[v6.1] KASAN: slab-out-of-bounds Read in dns_resolver_preparse
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syzbot
Jan 3, 2024, 9:33:30 AMJan 3
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: a507f147e6f0 Linux 6.1.70
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10990a09e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=374c4f371d017411
dashboard link: https://syzkaller.appspot.com/bug?extid=60eed284973197052313
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/941b73df0eaf/disk-a507f147.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/37f3d867ad6f/vmlinux-a507f147.xz
kernel image: https://storage.googleapis.com/syzbot-assets/aeb318de7a8d/bzImage-a507f147.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+60eed2...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in dns_resolver_preparse+0xcaf/0xd20 net/dns_resolver/dns_key.c:127
Read of size 1 at addr ffff888074b4db44 by task syz-executor.3/19807
CPU: 1 PID: 19807 Comm: syz-executor.3 Not tainted 6.1.70-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:395
kasan_report+0x136/0x160 mm/kasan/report.c:495
dns_resolver_preparse+0xcaf/0xd20 net/dns_resolver/dns_key.c:127
key_create_or_update+0x47b/0xbf0 security/keys/key.c:861
__do_sys_add_key security/keys/keyctl.c:134 [inline]
__se_sys_add_key+0x33b/0x480 security/keys/keyctl.c:74
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efe31a7cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efe3289f0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00007efe31b9bf80 RCX: 00007efe31a7cce9
RDX: 0000000020000080 RSI: 0000000000000000 RDI: 00000000200003c0
RBP: 00007efe31ac947a R08: 000000000238251f R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007efe31b9bf80 R15: 00007ffd6ea6df68
</TASK>
Allocated by task 19807:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:955 [inline]
__kmalloc_node+0xb3/0x230 mm/slab_common.c:962
kmalloc_node include/linux/slab.h:579 [inline]
kvmalloc_node+0x6e/0x180 mm/util.c:581
kvmalloc include/linux/slab.h:706 [inline]
__do_sys_add_key security/keys/keyctl.c:116 [inline]
__se_sys_add_key+0x26c/0x480 security/keys/keyctl.c:74
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff888074b4db40
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 4 bytes inside of
8-byte region [ffff888074b4db40, ffff888074b4db48)
The buggy address belongs to the physical page:
page:ffffea0001d2d340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74b4d
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0001ec7680 dead000000000002 ffff888012441280
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 26, tgid 26 (kworker/1:1), ts 261471784693, free_ts 261467680635
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513
prep_new_page mm/page_alloc.c:2520 [inline]
get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5545
alloc_slab_page+0x6a/0x150 mm/slub.c:1794
allocate_slab mm/slub.c:1939 [inline]
new_slab+0x84/0x2d0 mm/slub.c:1992
___slab_alloc+0xc20/0x1270 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
__kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437
__do_kmalloc_node mm/slab_common.c:954 [inline]
__kmalloc+0xa1/0x230 mm/slab_common.c:968
kmalloc_array include/linux/slab.h:605 [inline]
kcalloc include/linux/slab.h:636 [inline]
nsim_fib6_event_init drivers/net/netdevsim/fib.c:810 [inline]
nsim_fib6_prepare_event drivers/net/netdevsim/fib.c:947 [inline]
nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:1003 [inline]
nsim_fib_event_nb+0x1e3/0x1070 drivers/net/netdevsim/fib.c:1043
notifier_call_chain kernel/notifier.c:87 [inline]
atomic_notifier_call_chain+0x17c/0x2c0 kernel/notifier.c:225
call_fib_notifiers+0x2d/0x60 net/core/fib_notifier.c:35
call_fib6_entry_notifiers net/ipv6/ip6_fib.c:402 [inline]
fib6_add_rt2node net/ipv6/ip6_fib.c:1224 [inline]
fib6_add+0x1b66/0x3c80 net/ipv6/ip6_fib.c:1478
__ip6_ins_rt net/ipv6/route.c:1305 [inline]
ip6_ins_rt+0x102/0x170 net/ipv6/route.c:1315
__ipv6_ifa_notify+0x5bc/0x11d0 net/ipv6/addrconf.c:6169
ipv6_ifa_notify net/ipv6/addrconf.c:6208 [inline]
addrconf_dad_completed+0x17d/0xcb0 net/ipv6/addrconf.c:4224
addrconf_dad_work+0xd8e/0x16b0
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1440 [inline]
free_pcp_prepare mm/page_alloc.c:1490 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358
free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453
free_slab mm/slub.c:2031 [inline]
discard_slab mm/slub.c:2037 [inline]
__unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
put_cpu_partial+0x17b/0x250 mm/slub.c:2662
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
kmem_cache_alloc_node+0x136/0x310 mm/slub.c:3443
__alloc_skb+0xde/0x670 net/core/skbuff.c:505
alloc_skb include/linux/skbuff.h:1276 [inline]
alloc_skb_with_frags+0xa4/0x740 net/core/skbuff.c:6154
sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2738
sock_alloc_send_skb include/net/sock.h:1907 [inline]
mld_newpack+0x1c0/0xa90 net/ipv6/mcast.c:1748
add_grhead net/ipv6/mcast.c:1851 [inline]
add_grec+0x1492/0x19a0 net/ipv6/mcast.c:1989
mld_send_cr net/ipv6/mcast.c:2115 [inline]
mld_ifc_work+0x68f/0xc90 net/ipv6/mcast.c:2653
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
Memory state around the buggy address:
ffff888074b4da00: fb fc fc fc fc 05 fc fc fc fc 05 fc fc fc fc 05
ffff888074b4da80: fc fc fc fc 06 fc fc fc fc 05 fc fc fc fc fa fc
>ffff888074b4db00: fc fc fc 05 fc fc fc fc 04 fc fc fc fc fa fc fc
^
ffff888074b4db80: fc fc fb fc fc fc fc fb fc fc fc fc fb fc fc fc
ffff888074b4dc00: fc fb fc fc fc fc fa fc fc fc fc fa fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: a507f147e6f0 Linux 6.1.70
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10990a09e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=374c4f371d017411
dashboard link: https://syzkaller.appspot.com/bug?extid=60eed284973197052313
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/941b73df0eaf/disk-a507f147.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/37f3d867ad6f/vmlinux-a507f147.xz
kernel image: https://storage.googleapis.com/syzbot-assets/aeb318de7a8d/bzImage-a507f147.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+60eed2...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in dns_resolver_preparse+0xcaf/0xd20 net/dns_resolver/dns_key.c:127
Read of size 1 at addr ffff888074b4db44 by task syz-executor.3/19807
CPU: 1 PID: 19807 Comm: syz-executor.3 Not tainted 6.1.70-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:395
kasan_report+0x136/0x160 mm/kasan/report.c:495
dns_resolver_preparse+0xcaf/0xd20 net/dns_resolver/dns_key.c:127
key_create_or_update+0x47b/0xbf0 security/keys/key.c:861
__do_sys_add_key security/keys/keyctl.c:134 [inline]
__se_sys_add_key+0x33b/0x480 security/keys/keyctl.c:74
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efe31a7cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efe3289f0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00007efe31b9bf80 RCX: 00007efe31a7cce9
RDX: 0000000020000080 RSI: 0000000000000000 RDI: 00000000200003c0
RBP: 00007efe31ac947a R08: 000000000238251f R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007efe31b9bf80 R15: 00007ffd6ea6df68
</TASK>
Allocated by task 19807:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:955 [inline]
__kmalloc_node+0xb3/0x230 mm/slab_common.c:962
kmalloc_node include/linux/slab.h:579 [inline]
kvmalloc_node+0x6e/0x180 mm/util.c:581
kvmalloc include/linux/slab.h:706 [inline]
__do_sys_add_key security/keys/keyctl.c:116 [inline]
__se_sys_add_key+0x26c/0x480 security/keys/keyctl.c:74
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff888074b4db40
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 4 bytes inside of
8-byte region [ffff888074b4db40, ffff888074b4db48)
The buggy address belongs to the physical page:
page:ffffea0001d2d340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74b4d
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0001ec7680 dead000000000002 ffff888012441280
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 26, tgid 26 (kworker/1:1), ts 261471784693, free_ts 261467680635
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513
prep_new_page mm/page_alloc.c:2520 [inline]
get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5545
alloc_slab_page+0x6a/0x150 mm/slub.c:1794
allocate_slab mm/slub.c:1939 [inline]
new_slab+0x84/0x2d0 mm/slub.c:1992
___slab_alloc+0xc20/0x1270 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
__kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437
__do_kmalloc_node mm/slab_common.c:954 [inline]
__kmalloc+0xa1/0x230 mm/slab_common.c:968
kmalloc_array include/linux/slab.h:605 [inline]
kcalloc include/linux/slab.h:636 [inline]
nsim_fib6_event_init drivers/net/netdevsim/fib.c:810 [inline]
nsim_fib6_prepare_event drivers/net/netdevsim/fib.c:947 [inline]
nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:1003 [inline]
nsim_fib_event_nb+0x1e3/0x1070 drivers/net/netdevsim/fib.c:1043
notifier_call_chain kernel/notifier.c:87 [inline]
atomic_notifier_call_chain+0x17c/0x2c0 kernel/notifier.c:225
call_fib_notifiers+0x2d/0x60 net/core/fib_notifier.c:35
call_fib6_entry_notifiers net/ipv6/ip6_fib.c:402 [inline]
fib6_add_rt2node net/ipv6/ip6_fib.c:1224 [inline]
fib6_add+0x1b66/0x3c80 net/ipv6/ip6_fib.c:1478
__ip6_ins_rt net/ipv6/route.c:1305 [inline]
ip6_ins_rt+0x102/0x170 net/ipv6/route.c:1315
__ipv6_ifa_notify+0x5bc/0x11d0 net/ipv6/addrconf.c:6169
ipv6_ifa_notify net/ipv6/addrconf.c:6208 [inline]
addrconf_dad_completed+0x17d/0xcb0 net/ipv6/addrconf.c:4224
addrconf_dad_work+0xd8e/0x16b0
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1440 [inline]
free_pcp_prepare mm/page_alloc.c:1490 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358
free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453
free_slab mm/slub.c:2031 [inline]
discard_slab mm/slub.c:2037 [inline]
__unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
put_cpu_partial+0x17b/0x250 mm/slub.c:2662
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
kmem_cache_alloc_node+0x136/0x310 mm/slub.c:3443
__alloc_skb+0xde/0x670 net/core/skbuff.c:505
alloc_skb include/linux/skbuff.h:1276 [inline]
alloc_skb_with_frags+0xa4/0x740 net/core/skbuff.c:6154
sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2738
sock_alloc_send_skb include/net/sock.h:1907 [inline]
mld_newpack+0x1c0/0xa90 net/ipv6/mcast.c:1748
add_grhead net/ipv6/mcast.c:1851 [inline]
add_grec+0x1492/0x19a0 net/ipv6/mcast.c:1989
mld_send_cr net/ipv6/mcast.c:2115 [inline]
mld_ifc_work+0x68f/0xc90 net/ipv6/mcast.c:2653
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
Memory state around the buggy address:
ffff888074b4da00: fb fc fc fc fc 05 fc fc fc fc 05 fc fc fc fc 05
ffff888074b4da80: fc fc fc fc 06 fc fc fc fc 05 fc fc fc fc fa fc
>ffff888074b4db00: fc fc fc 05 fc fc fc fc 04 fc fc fc fc fa fc fc
^
ffff888074b4db80: fc fc fb fc fc fc fc fb fc fc fc fc fb fc fc fc
ffff888074b4dc00: fc fb fc fc fc fc fa fc fc fc fc fa fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Jan 3, 2024, 10:05:25 AMJan 3
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: a507f147e6f0 Linux 6.1.70
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17aafe19e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=af33470cb003e14e
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14b32409e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117c147ee80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7157b698190b/disk-a507f147.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/075d989b469b/vmlinux-a507f147.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f18b4225d20b/Image-a507f147.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+60eed2...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in dns_resolver_preparse+0xa98/0xaf8 net/dns_resolver/dns_key.c:127
Read of size 1 at addr ffff0000c2ee2304 by task syz-executor970/4221
CPU: 0 PID: 4221 Comm: syz-executor970 Not tainted 6.1.70-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x174/0x4c0 mm/kasan/report.c:395
kasan_report+0xd4/0x130 mm/kasan/report.c:495
__asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
dns_resolver_preparse+0xa98/0xaf8 net/dns_resolver/dns_key.c:127
key_create_or_update+0x43c/0xa38 security/keys/key.c:861
__do_sys_add_key security/keys/keyctl.c:134 [inline]
__se_sys_add_key security/keys/keyctl.c:74 [inline]
__arm64_sys_add_key+0x418/0x550 security/keys/keyctl.c:74
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Allocated by task 4221:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
kmalloc_node include/linux/slab.h:579 [inline]
kvmalloc_node+0x84/0x1e4 mm/util.c:581
__arm64_sys_add_key+0x29c/0x550 security/keys/keyctl.c:74
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Last potentially related work creation:
kasan_save_stack+0x40/0x70 mm/kasan/common.c:45
__kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496
kvfree_call_rcu+0xb4/0x714 kernel/rcu/tree.c:3368
kernfs_unlink_open_file+0x398/0x448 fs/kernfs/file.c:629
kernfs_fop_release+0x130/0x198 fs/kernfs/file.c:801
__fput+0x30c/0x7bc fs/file_table.c:320
____fput+0x20/0x30 fs/file_table.c:348
task_work_run+0x240/0x2f0 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x2148/0x3474 arch/arm64/kernel/signal.c:1132
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
The buggy address belongs to the object at ffff0000c2ee2300
which belongs to the cache kmalloc-128 of size 128
The buggy address belongs to the physical page:
page:00000000b5954f28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ee2
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000200 dead000000000100 dead000000000122 ffff0000c0002300
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
ffff0000c2ee2280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000c2ee2300: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff0000c2ee2380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c2ee2400: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: a507f147e6f0 Linux 6.1.70
git tree: linux-6.1.y
kernel config: https://syzkaller.appspot.com/x/.config?x=af33470cb003e14e
dashboard link: https://syzkaller.appspot.com/bug?extid=60eed284973197052313
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14b32409e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117c147ee80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7157b698190b/disk-a507f147.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/075d989b469b/vmlinux-a507f147.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f18b4225d20b/Image-a507f147.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+60eed2...@syzkaller.appspotmail.com
==================================================================
Read of size 1 at addr ffff0000c2ee2304 by task syz-executor970/4221
CPU: 0 PID: 4221 Comm: syz-executor970 Not tainted 6.1.70-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x174/0x4c0 mm/kasan/report.c:395
kasan_report+0xd4/0x130 mm/kasan/report.c:495
__asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
dns_resolver_preparse+0xa98/0xaf8 net/dns_resolver/dns_key.c:127
key_create_or_update+0x43c/0xa38 security/keys/key.c:861
__do_sys_add_key security/keys/keyctl.c:134 [inline]
__se_sys_add_key security/keys/keyctl.c:74 [inline]
__arm64_sys_add_key+0x418/0x550 security/keys/keyctl.c:74
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Allocated by task 4221:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:955 [inline]
__kmalloc_node+0xe0/0x1d0 mm/slab_common.c:962
__do_kmalloc_node mm/slab_common.c:955 [inline]
kmalloc_node include/linux/slab.h:579 [inline]
kvmalloc_node+0x84/0x1e4 mm/util.c:581
kvmalloc include/linux/slab.h:706 [inline]
__do_sys_add_key security/keys/keyctl.c:116 [inline]
__se_sys_add_key security/keys/keyctl.c:74 [inline]
__do_sys_add_key security/keys/keyctl.c:116 [inline]
__arm64_sys_add_key+0x29c/0x550 security/keys/keyctl.c:74
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Last potentially related work creation:
kasan_save_stack+0x40/0x70 mm/kasan/common.c:45
__kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496
kvfree_call_rcu+0xb4/0x714 kernel/rcu/tree.c:3368
kernfs_unlink_open_file+0x398/0x448 fs/kernfs/file.c:629
kernfs_fop_release+0x130/0x198 fs/kernfs/file.c:801
__fput+0x30c/0x7bc fs/file_table.c:320
____fput+0x20/0x30 fs/file_table.c:348
task_work_run+0x240/0x2f0 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x2148/0x3474 arch/arm64/kernel/signal.c:1132
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
The buggy address belongs to the object at ffff0000c2ee2300
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 4 bytes inside of
128-byte region [ffff0000c2ee2300, ffff0000c2ee2380)
The buggy address belongs to the physical page:
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000200 dead000000000100 dead000000000122 ffff0000c0002300
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c2ee2200: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
ffff0000c2ee2280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000c2ee2300: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff0000c2ee2380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c2ee2400: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
syzbot
Jan 9, 2024, 1:29:30 PMJan 9
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 26c690eff0a5 Linux 5.15.146
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15d5cf4de80000
kernel config: https://syzkaller.appspot.com/x/.config?x=dc70d39e176dd118
dashboard link: https://syzkaller.appspot.com/bug?extid=b0798878a9d0be878a54
disk image: https://storage.googleapis.com/syzbot-assets/40141853e0d3/disk-26c690ef.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/87e1356f3f98/vmlinux-26c690ef.xz
kernel image: https://storage.googleapis.com/syzbot-assets/77c63c93083b/bzImage-26c690ef.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b07988...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in dns_resolver_preparse+0xcaf/0xd20 net/dns_resolver/dns_key.c:127
Read of size 1 at addr ffff88802110d824 by task syz-executor.1/12991
CPU: 1 PID: 12991 Comm: syz-executor.1 Not tainted 5.15.146-syzkaller #0
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
dns_resolver_preparse+0xcaf/0xd20 net/dns_resolver/dns_key.c:127
key_create_or_update+0x47b/0xbf0 security/keys/key.c:861
__do_sys_add_key security/keys/keyctl.c:134 [inline]
__se_sys_add_key+0x33b/0x480 security/keys/keyctl.c:74
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fb5b8dc1d29
RAX: ffffffffffffffda RBX: 00007fb5b8ef0f80 RCX: 00007fb5b8dc1d29
</TASK>
Allocated by task 12991:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc_node+0x199/0x390 mm/slub.c:4455
kmalloc_node include/linux/slab.h:614 [inline]
kvmalloc_node+0x80/0x140 mm/util.c:619
kvmalloc include/linux/mm.h:805 [inline]
__do_sys_add_key security/keys/keyctl.c:116 [inline]
__se_sys_add_key+0x26c/0x480 security/keys/keyctl.c:74
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff88802110d820
which belongs to the cache kmalloc-8 of size 8
The buggy address belongs to the page:
page:ffffea0000844340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2110d
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5421
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
__kmalloc_node+0x1fa/0x390 mm/slub.c:4451
kmalloc_node include/linux/slab.h:614 [inline]
__vmalloc_area_node mm/vmalloc.c:2910 [inline]
__vmalloc_node_range+0x2e2/0x8c0 mm/vmalloc.c:3029
__vmalloc_node mm/vmalloc.c:3079 [inline]
vzalloc+0x75/0x80 mm/vmalloc.c:3149
__do_replace+0xc4/0xae0 net/ipv6/netfilter/ip6_tables.c:1065
do_replace net/ipv6/netfilter/ip6_tables.c:1156 [inline]
do_ip6t_set_ctl+0x2d9c/0x3f50 net/ipv6/netfilter/ip6_tables.c:1638
nf_setsockopt+0x28a/0x2b0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x2f9a/0x43a0 net/ipv6/ipv6_sockglue.c:1011
tcp_setsockopt+0x23f/0x3680 net/ipv4/tcp.c:3694
__sys_setsockopt+0x57e/0x990 net/socket.c:2196
__do_sys_setsockopt net/socket.c:2207 [inline]
__se_sys_setsockopt net/socket.c:2204 [inline]
__x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2204
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
__vunmap+0x8d4/0xa20 mm/vmalloc.c:2621
copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:884 [inline]
get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline]
do_ip6t_get_ctl+0x11db/0x1890 net/ipv6/netfilter/ip6_tables.c:1671
nf_getsockopt+0x28e/0x2b0 net/netfilter/nf_sockopt.c:116
ipv6_getsockopt+0x468/0x2ff0 net/ipv6/ipv6_sockglue.c:1489
tcp_getsockopt+0x26d/0x6c20 net/ipv4/tcp.c:4293
__sys_getsockopt+0x2a6/0x550 net/socket.c:2240
__do_sys_getsockopt net/socket.c:2255 [inline]
__se_sys_getsockopt net/socket.c:2252 [inline]
__x64_sys_getsockopt+0xb1/0xc0 net/socket.c:2252
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Memory state around the buggy address:
ffff88802110d700: fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc fc
ffff88802110d780: fa fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa
>ffff88802110d800: fc fc fc fc 04 fc fc fc fc fb fc fc fc fc fb fc
^
ffff88802110d880: fc fc fc fa fc fc fc fc 00 fc fc fc fc fa fc fc
ffff88802110d900: fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc
==================================================================
---
syzbot found the following issue on:
HEAD commit: 26c690eff0a5 Linux 5.15.146
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15d5cf4de80000
kernel config: https://syzkaller.appspot.com/x/.config?x=dc70d39e176dd118
dashboard link: https://syzkaller.appspot.com/bug?extid=b0798878a9d0be878a54
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/40141853e0d3/disk-26c690ef.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/87e1356f3f98/vmlinux-26c690ef.xz
kernel image: https://storage.googleapis.com/syzbot-assets/77c63c93083b/bzImage-26c690ef.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
==================================================================
BUG: KASAN: slab-out-of-bounds in dns_resolver_preparse+0xcaf/0xd20 net/dns_resolver/dns_key.c:127
Read of size 1 at addr ffff88802110d824 by task syz-executor.1/12991
CPU: 1 PID: 12991 Comm: syz-executor.1 Not tainted 5.15.146-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
dns_resolver_preparse+0xcaf/0xd20 net/dns_resolver/dns_key.c:127
key_create_or_update+0x47b/0xbf0 security/keys/key.c:861
__do_sys_add_key security/keys/keyctl.c:134 [inline]
__se_sys_add_key+0x33b/0x480 security/keys/keyctl.c:74
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fb5b8dc1d29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb5b73430c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00007fb5b8ef0f80 RCX: 00007fb5b8dc1d29
RDX: 0000000020000080 RSI: 0000000000000000 RDI: 00000000200003c0
RBP: 00007fb5b8e0e47a R08: 000000003ee61498 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb5b8ef0f80 R15: 00007ffeacf89218
</TASK>
Allocated by task 12991:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc_node+0x199/0x390 mm/slub.c:4455
kmalloc_node include/linux/slab.h:614 [inline]
kvmalloc_node+0x80/0x140 mm/util.c:619
kvmalloc include/linux/mm.h:805 [inline]
__do_sys_add_key security/keys/keyctl.c:116 [inline]
__se_sys_add_key+0x26c/0x480 security/keys/keyctl.c:74
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff88802110d820
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 4 bytes inside of
8-byte region [ffff88802110d820, ffff88802110d828)
The buggy address belongs to the page:
page:ffffea0000844340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2110d
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea00007e5e00 0000006400000002 ffff888011c41280
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 3558, ts 237777658315, free_ts 237777528402
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5421
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
__kmalloc_node+0x1fa/0x390 mm/slub.c:4451
kmalloc_node include/linux/slab.h:614 [inline]
__vmalloc_area_node mm/vmalloc.c:2910 [inline]
__vmalloc_node_range+0x2e2/0x8c0 mm/vmalloc.c:3029
__vmalloc_node mm/vmalloc.c:3079 [inline]
vzalloc+0x75/0x80 mm/vmalloc.c:3149
__do_replace+0xc4/0xae0 net/ipv6/netfilter/ip6_tables.c:1065
do_replace net/ipv6/netfilter/ip6_tables.c:1156 [inline]
do_ip6t_set_ctl+0x2d9c/0x3f50 net/ipv6/netfilter/ip6_tables.c:1638
nf_setsockopt+0x28a/0x2b0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x2f9a/0x43a0 net/ipv6/ipv6_sockglue.c:1011
tcp_setsockopt+0x23f/0x3680 net/ipv4/tcp.c:3694
__sys_setsockopt+0x57e/0x990 net/socket.c:2196
__do_sys_setsockopt net/socket.c:2207 [inline]
__se_sys_setsockopt net/socket.c:2204 [inline]
__x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2204
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
__vunmap+0x8d4/0xa20 mm/vmalloc.c:2621
copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:884 [inline]
get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline]
do_ip6t_get_ctl+0x11db/0x1890 net/ipv6/netfilter/ip6_tables.c:1671
nf_getsockopt+0x28e/0x2b0 net/netfilter/nf_sockopt.c:116
ipv6_getsockopt+0x468/0x2ff0 net/ipv6/ipv6_sockglue.c:1489
tcp_getsockopt+0x26d/0x6c20 net/ipv4/tcp.c:4293
__sys_getsockopt+0x2a6/0x550 net/socket.c:2240
__do_sys_getsockopt net/socket.c:2255 [inline]
__se_sys_getsockopt net/socket.c:2252 [inline]
__x64_sys_getsockopt+0xb1/0xc0 net/socket.c:2252
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Memory state around the buggy address:
ffff88802110d780: fa fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa
>ffff88802110d800: fc fc fc fc 04 fc fc fc fc fb fc fc fc fc fb fc
^
ffff88802110d880: fc fc fc fa fc fc fc fc 00 fc fc fc fc fa fc fc
ffff88802110d900: fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc
==================================================================
---
syzbot
Jan 10, 2024, 7:27:29 AMJan 10
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 26c690eff0a5 Linux 5.15.146
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1336c55de80000
kernel config: https://syzkaller.appspot.com/x/.config?x=ab948f7b303e76f8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12ddd1e5e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f29069e80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/33e6f3a42ce6/disk-26c690ef.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0224f0ff4ede/vmlinux-26c690ef.xz
kernel image: https://storage.googleapis.com/syzbot-assets/822737ca97e0/Image-26c690ef.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b07988...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in dns_resolver_preparse+0xa98/0xaf8 net/dns_resolver/dns_key.c:127
Read of size 1 at addr ffff0000c9641c04 by task syz-executor388/3965
CPU: 1 PID: 3965 Comm: syz-executor388 Not tainted 5.15.146-syzkaller #0
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x174/0x1e4 mm/kasan/report.c:451
__asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306
dns_resolver_preparse+0xa98/0xaf8 net/dns_resolver/dns_key.c:127
key_create_or_update+0x43c/0xa38 security/keys/key.c:861
__do_sys_add_key security/keys/keyctl.c:134 [inline]
__se_sys_add_key security/keys/keyctl.c:74 [inline]
__arm64_sys_add_key+0x440/0x578 security/keys/keyctl.c:74
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Allocated by task 3965:
__kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc_node+0x2c0/0x5b8 mm/slub.c:4455
kmalloc_node include/linux/slab.h:614 [inline]
kvmalloc_node+0x88/0x204 mm/util.c:619
__arm64_sys_add_key+0x29c/0x578 security/keys/keyctl.c:74
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
The buggy address belongs to the object at ffff0000c9641c00
which belongs to the cache kmalloc-128 of size 128
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
ffff0000c9641b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000c9641c00: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff0000c9641c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c9641d00: 05 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
HEAD commit: 26c690eff0a5 Linux 5.15.146
git tree: linux-5.15.y
kernel config: https://syzkaller.appspot.com/x/.config?x=ab948f7b303e76f8
dashboard link: https://syzkaller.appspot.com/bug?extid=b0798878a9d0be878a54
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12ddd1e5e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f29069e80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/33e6f3a42ce6/disk-26c690ef.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0224f0ff4ede/vmlinux-26c690ef.xz
kernel image: https://storage.googleapis.com/syzbot-assets/822737ca97e0/Image-26c690ef.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b07988...@syzkaller.appspotmail.com
==================================================================
Read of size 1 at addr ffff0000c9641c04 by task syz-executor388/3965
CPU: 1 PID: 3965 Comm: syz-executor388 Not tainted 5.15.146-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x174/0x1e4 mm/kasan/report.c:451
__asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306
dns_resolver_preparse+0xa98/0xaf8 net/dns_resolver/dns_key.c:127
key_create_or_update+0x43c/0xa38 security/keys/key.c:861
__do_sys_add_key security/keys/keyctl.c:134 [inline]
__se_sys_add_key security/keys/keyctl.c:74 [inline]
__arm64_sys_add_key+0x440/0x578 security/keys/keyctl.c:74
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Allocated by task 3965:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc_node+0x2c0/0x5b8 mm/slub.c:4455
kmalloc_node include/linux/slab.h:614 [inline]
kvmalloc_node+0x88/0x204 mm/util.c:619
kvmalloc include/linux/mm.h:805 [inline]
__do_sys_add_key security/keys/keyctl.c:116 [inline]
__se_sys_add_key security/keys/keyctl.c:74 [inline]
__do_sys_add_key security/keys/keyctl.c:116 [inline]
__arm64_sys_add_key+0x29c/0x578 security/keys/keyctl.c:74
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
The buggy address belongs to the object at ffff0000c9641c00
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 4 bytes inside of
128-byte region [ffff0000c9641c00, ffff0000c9641c80)
The buggy address belongs to the page:
page:00000000b441518f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109641
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000200 fffffc0003269700 0000000200000002 ffff0000c0002300
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c9641b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000c9641b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000c9641c00: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff0000c9641c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c9641d00: 05 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
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