[Android 5.10] KASAN: slab-out-of-bounds Read in xfrm_policy_inexact_list_reinsert
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syzbot
Jan 26, 2025, 4:48:27 PM1/26/25
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: fbe98d68b6b3 ANDROID: GKI: virtual_device: add blk_mq_quie..
git tree: android13-5.10-lts
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17feb9f8580000
kernel config: https://syzkaller.appspot.com/x/.config?x=bb5a3483ded8ee09
dashboard link: https://syzkaller.appspot.com/bug?extid=2a66123e41252788b0ca
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=1001b9f8580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=100cf5df980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d6f259919514/disk-fbe98d68.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d20d6e4a205a/vmlinux-fbe98d68.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c090817df96c/bzImage-fbe98d68.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2a6612...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:853
Read of size 1 at addr ffff88811ce0dbd8 by task syz-executor193/287
CPU: 1 PID: 287 Comm: syz-executor193 Not tainted 5.10.233-syzkaller-00881-gfbe98d68b6b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
print_address_description+0x81/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:435 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:452
__asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:853
xfrm_policy_inexact_node_merge net/xfrm/xfrm_policy.c:985 [inline]
xfrm_policy_inexact_insert_node+0x917/0xb00 net/xfrm/xfrm_policy.c:1041
xfrm_policy_inexact_alloc_chain+0x4ec/0xaf0 net/xfrm/xfrm_policy.c:1157
xfrm_policy_inexact_insert+0x6a/0x1160 net/xfrm/xfrm_policy.c:1200
xfrm_policy_insert+0xe7/0x940 net/xfrm/xfrm_policy.c:1583
xfrm_add_policy+0x4f2/0x980 net/xfrm/xfrm_user.c:1733
xfrm_user_rcv_msg+0x4e7/0x7c0 net/xfrm/xfrm_user.c:2789
netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2485
xfrm_netlink_rcv+0x72/0x90 net/xfrm/xfrm_user.c:2811
netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline]
netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1333
netlink_sendmsg+0xa46/0xd00 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:652 [inline]
__sock_sendmsg net/socket.c:664 [inline]
____sys_sendmsg+0x59e/0x8f0 net/socket.c:2376
___sys_sendmsg+0x252/0x2e0 net/socket.c:2430
__sys_sendmsg net/socket.c:2459 [inline]
__do_sys_sendmsg net/socket.c:2468 [inline]
__se_sys_sendmsg+0x1b1/0x280 net/socket.c:2466
__x64_sys_sendmsg+0x7b/0x90 net/socket.c:2466
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f47b7a51e29
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd09ba7498 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffd09ba7668 RCX: 00007f47b7a51e29
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000003
RBP: 00007f47b7ac5610 R08: 000000000000000a R09: 00007ffd09ba7668
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd09ba7658 R14: 0000000000000001 R15: 0000000000000001
Allocated by task 287:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:430 [inline]
____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518
kasan_kmalloc include/linux/kasan.h:254 [inline]
__kmalloc+0x1aa/0x330 mm/slub.c:4033
kmalloc include/linux/slab.h:557 [inline]
sk_prot_alloc+0xbe/0x370 net/core/sock.c:1716
sk_alloc+0x38/0x4d0 net/core/sock.c:1774
pfkey_create+0x12c/0x620 net/key/af_key.c:154
__sock_create+0x3a6/0x760 net/socket.c:1436
sock_create net/socket.c:1487 [inline]
__sys_socket+0x132/0x370 net/socket.c:1529
__do_sys_socket net/socket.c:1538 [inline]
__se_sys_socket net/socket.c:1536 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1536
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff88811ce0d800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 984 bytes inside of
1024-byte region [ffff88811ce0d800, ffff88811ce0dc00)
The buggy address belongs to the page:
page:ffffea0004738200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ce08
head:ffffea0004738200 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 281, ts 20884197848, free_ts 20877317649
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook mm/page_alloc.c:2456 [inline]
prep_new_page+0x166/0x180 mm/page_alloc.c:2462
get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
__alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348
allocate_slab mm/slub.c:1808 [inline]
new_slab+0x80/0x400 mm/slub.c:1869
new_slab_objects mm/slub.c:2627 [inline]
___slab_alloc+0x302/0x4b0 mm/slub.c:2791
__slab_alloc+0x63/0xa0 mm/slub.c:2831
slab_alloc_node mm/slub.c:2913 [inline]
slab_alloc mm/slub.c:2955 [inline]
__kmalloc_track_caller+0x1f8/0x320 mm/slub.c:4536
__kmalloc_reserve net/core/skbuff.c:144 [inline]
__alloc_skb+0xbc/0x510 net/core/skbuff.c:212
alloc_skb_fclone include/linux/skbuff.h:1176 [inline]
sk_stream_alloc_skb+0x1f8/0xae0 net/ipv4/tcp.c:892
tcp_sendmsg_locked+0xce3/0x3ae0 net/ipv4/tcp.c:1300
tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1452
inet_sendmsg+0xa1/0xc0 net/ipv4/af_inet.c:830
sock_sendmsg_nosec net/socket.c:652 [inline]
__sock_sendmsg net/socket.c:664 [inline]
sock_write_iter+0x39b/0x530 net/socket.c:1018
call_write_iter include/linux/fs.h:2058 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0xb4c/0xe70 fs/read_write.c:605
ksys_write+0x199/0x2c0 fs/read_write.c:658
__do_sys_write fs/read_write.c:670 [inline]
__se_sys_write fs/read_write.c:667 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:667
page last free stack trace:
reset_page_owner include/linux/page_owner.h:28 [inline]
free_pages_prepare mm/page_alloc.c:1349 [inline]
__free_pages_ok+0x82c/0x850 mm/page_alloc.c:1629
free_compound_page+0x73/0x90 mm/page_alloc.c:710
destroy_compound_page include/linux/mm.h:959 [inline]
__put_compound_page+0x73/0xb0 mm/swap.c:117
__put_page+0xc0/0xe0 mm/swap.c:133
put_page include/linux/mm.h:1257 [inline]
page_to_skb+0x3f6/0x900 drivers/net/virtio_net.c:453
receive_mergeable drivers/net/virtio_net.c:1019 [inline]
receive_buf+0xe79/0x53d0 drivers/net/virtio_net.c:1129
virtnet_receive drivers/net/virtio_net.c:1421 [inline]
virtnet_poll+0x5df/0x1240 drivers/net/virtio_net.c:1530
napi_poll net/core/dev.c:6873 [inline]
net_rx_action+0x516/0x10d0 net/core/dev.c:6943
__do_softirq+0x268/0x5bb kernel/softirq.c:309
Memory state around the buggy address:
ffff88811ce0da80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88811ce0db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88811ce0db80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
^
ffff88811ce0dc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88811ce0dc80: fc fc fc fc fc fc fc fc fc fc fc fc 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 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.
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: fbe98d68b6b3 ANDROID: GKI: virtual_device: add blk_mq_quie..
git tree: android13-5.10-lts
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17feb9f8580000
kernel config: https://syzkaller.appspot.com/x/.config?x=bb5a3483ded8ee09
dashboard link: https://syzkaller.appspot.com/bug?extid=2a66123e41252788b0ca
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=1001b9f8580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=100cf5df980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d6f259919514/disk-fbe98d68.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d20d6e4a205a/vmlinux-fbe98d68.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c090817df96c/bzImage-fbe98d68.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2a6612...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:853
Read of size 1 at addr ffff88811ce0dbd8 by task syz-executor193/287
CPU: 1 PID: 287 Comm: syz-executor193 Not tainted 5.10.233-syzkaller-00881-gfbe98d68b6b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
print_address_description+0x81/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:435 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:452
__asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:853
xfrm_policy_inexact_node_merge net/xfrm/xfrm_policy.c:985 [inline]
xfrm_policy_inexact_insert_node+0x917/0xb00 net/xfrm/xfrm_policy.c:1041
xfrm_policy_inexact_alloc_chain+0x4ec/0xaf0 net/xfrm/xfrm_policy.c:1157
xfrm_policy_inexact_insert+0x6a/0x1160 net/xfrm/xfrm_policy.c:1200
xfrm_policy_insert+0xe7/0x940 net/xfrm/xfrm_policy.c:1583
xfrm_add_policy+0x4f2/0x980 net/xfrm/xfrm_user.c:1733
xfrm_user_rcv_msg+0x4e7/0x7c0 net/xfrm/xfrm_user.c:2789
netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2485
xfrm_netlink_rcv+0x72/0x90 net/xfrm/xfrm_user.c:2811
netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline]
netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1333
netlink_sendmsg+0xa46/0xd00 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:652 [inline]
__sock_sendmsg net/socket.c:664 [inline]
____sys_sendmsg+0x59e/0x8f0 net/socket.c:2376
___sys_sendmsg+0x252/0x2e0 net/socket.c:2430
__sys_sendmsg net/socket.c:2459 [inline]
__do_sys_sendmsg net/socket.c:2468 [inline]
__se_sys_sendmsg+0x1b1/0x280 net/socket.c:2466
__x64_sys_sendmsg+0x7b/0x90 net/socket.c:2466
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f47b7a51e29
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd09ba7498 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffd09ba7668 RCX: 00007f47b7a51e29
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000003
RBP: 00007f47b7ac5610 R08: 000000000000000a R09: 00007ffd09ba7668
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd09ba7658 R14: 0000000000000001 R15: 0000000000000001
Allocated by task 287:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:430 [inline]
____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518
kasan_kmalloc include/linux/kasan.h:254 [inline]
__kmalloc+0x1aa/0x330 mm/slub.c:4033
kmalloc include/linux/slab.h:557 [inline]
sk_prot_alloc+0xbe/0x370 net/core/sock.c:1716
sk_alloc+0x38/0x4d0 net/core/sock.c:1774
pfkey_create+0x12c/0x620 net/key/af_key.c:154
__sock_create+0x3a6/0x760 net/socket.c:1436
sock_create net/socket.c:1487 [inline]
__sys_socket+0x132/0x370 net/socket.c:1529
__do_sys_socket net/socket.c:1538 [inline]
__se_sys_socket net/socket.c:1536 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1536
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff88811ce0d800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 984 bytes inside of
1024-byte region [ffff88811ce0d800, ffff88811ce0dc00)
The buggy address belongs to the page:
page:ffffea0004738200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ce08
head:ffffea0004738200 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 281, ts 20884197848, free_ts 20877317649
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook mm/page_alloc.c:2456 [inline]
prep_new_page+0x166/0x180 mm/page_alloc.c:2462
get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
__alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348
allocate_slab mm/slub.c:1808 [inline]
new_slab+0x80/0x400 mm/slub.c:1869
new_slab_objects mm/slub.c:2627 [inline]
___slab_alloc+0x302/0x4b0 mm/slub.c:2791
__slab_alloc+0x63/0xa0 mm/slub.c:2831
slab_alloc_node mm/slub.c:2913 [inline]
slab_alloc mm/slub.c:2955 [inline]
__kmalloc_track_caller+0x1f8/0x320 mm/slub.c:4536
__kmalloc_reserve net/core/skbuff.c:144 [inline]
__alloc_skb+0xbc/0x510 net/core/skbuff.c:212
alloc_skb_fclone include/linux/skbuff.h:1176 [inline]
sk_stream_alloc_skb+0x1f8/0xae0 net/ipv4/tcp.c:892
tcp_sendmsg_locked+0xce3/0x3ae0 net/ipv4/tcp.c:1300
tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1452
inet_sendmsg+0xa1/0xc0 net/ipv4/af_inet.c:830
sock_sendmsg_nosec net/socket.c:652 [inline]
__sock_sendmsg net/socket.c:664 [inline]
sock_write_iter+0x39b/0x530 net/socket.c:1018
call_write_iter include/linux/fs.h:2058 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0xb4c/0xe70 fs/read_write.c:605
ksys_write+0x199/0x2c0 fs/read_write.c:658
__do_sys_write fs/read_write.c:670 [inline]
__se_sys_write fs/read_write.c:667 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:667
page last free stack trace:
reset_page_owner include/linux/page_owner.h:28 [inline]
free_pages_prepare mm/page_alloc.c:1349 [inline]
__free_pages_ok+0x82c/0x850 mm/page_alloc.c:1629
free_compound_page+0x73/0x90 mm/page_alloc.c:710
destroy_compound_page include/linux/mm.h:959 [inline]
__put_compound_page+0x73/0xb0 mm/swap.c:117
__put_page+0xc0/0xe0 mm/swap.c:133
put_page include/linux/mm.h:1257 [inline]
page_to_skb+0x3f6/0x900 drivers/net/virtio_net.c:453
receive_mergeable drivers/net/virtio_net.c:1019 [inline]
receive_buf+0xe79/0x53d0 drivers/net/virtio_net.c:1129
virtnet_receive drivers/net/virtio_net.c:1421 [inline]
virtnet_poll+0x5df/0x1240 drivers/net/virtio_net.c:1530
napi_poll net/core/dev.c:6873 [inline]
net_rx_action+0x516/0x10d0 net/core/dev.c:6943
__do_softirq+0x268/0x5bb kernel/softirq.c:309
Memory state around the buggy address:
ffff88811ce0da80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88811ce0db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88811ce0db80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
^
ffff88811ce0dc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88811ce0dc80: fc fc fc fc fc fc fc fc fc fc fc fc 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 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.
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 30, 2025, 6:29:31 PM1/30/25
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 49530c73f82d Merge tag 'android12-5.4.289_r00' into androi..
syzbot found the following issue on:
git tree: android12-5.4
console+strace: https://syzkaller.appspot.com/x/log.txt?x=13b30518580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9bcfb44d32c96d73
dashboard link: https://syzkaller.appspot.com/bug?extid=a3eab7156d554167eeda
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=12329ddf980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=121765f8580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/731c43f65429/disk-49530c73.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/87ec0147c646/vmlinux-49530c73.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b343ee808aa1/bzImage-49530c73.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
==================================================================
BUG: KASAN: slab-out-of-bounds in xfrm_policy_inexact_list_reinsert+0x599/0x650 net/xfrm/xfrm_policy.c:855
Read of size 1 at addr ffff8881ef3473d8 by task syz-executor319/359
CPU: 0 PID: 359 Comm: syz-executor319 Not tainted 5.4.289-syzkaller-00025-g49530c73f82d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
print_address_description+0x8c/0x600 mm/kasan/report.c:384
__kasan_report+0xf3/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
xfrm_policy_inexact_list_reinsert+0x599/0x650 net/xfrm/xfrm_policy.c:855
xfrm_policy_inexact_node_merge net/xfrm/xfrm_policy.c:987 [inline]
xfrm_policy_inexact_insert_node+0x8f3/0xb00 net/xfrm/xfrm_policy.c:1043
xfrm_policy_inexact_alloc_chain+0x4f9/0xb10 net/xfrm/xfrm_policy.c:1159
xfrm_policy_inexact_insert+0x69/0x10e0 net/xfrm/xfrm_policy.c:1202
xfrm_policy_insert+0xe1/0x8a0 net/xfrm/xfrm_policy.c:1585
xfrm_add_policy+0x4f2/0x980 net/xfrm/xfrm_user.c:1720
xfrm_user_rcv_msg+0x689/0x9b0 net/xfrm/xfrm_user.c:2775
netlink_rcv_skb+0x1d5/0x420 net/netlink/af_netlink.c:2467
xfrm_netlink_rcv+0x6e/0x80 net/xfrm/xfrm_user.c:2797
netlink_unicast_kernel net/netlink/af_netlink.c:1306 [inline]
netlink_unicast+0x936/0xb20 net/netlink/af_netlink.c:1332
netlink_sendmsg+0xa18/0xcf0 net/netlink/af_netlink.c:1900
sock_sendmsg_nosec net/socket.c:638 [inline]
__sock_sendmsg net/socket.c:650 [inline]
____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2306
___sys_sendmsg net/socket.c:2360 [inline]
__sys_sendmsg+0x28b/0x380 net/socket.c:2406
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fc018754e29
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff32d0def8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fff32d0e0c8 RCX: 00007fc018754e29
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000003
RBP: 00007fc0187c8610 R08: 000000000000000a R09: 00007fff32d0e0c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff32d0e0b8 R14: 0000000000000001 R15: 0000000000000001
Allocated by task 359:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
kmalloc include/linux/slab.h:561 [inline]
sk_prot_alloc+0xbd/0x3e0 net/core/sock.c:1622
sk_alloc+0x35/0x2f0 net/core/sock.c:1680
pfkey_create+0x122/0x670 net/key/af_key.c:154
__sock_create+0x3cb/0x7a0 net/socket.c:1427
sock_create net/socket.c:1478 [inline]
__sys_socket+0x132/0x370 net/socket.c:1520
__do_sys_socket net/socket.c:1529 [inline]
__se_sys_socket net/socket.c:1527 [inline]
__x64_sys_socket+0x76/0x80 net/socket.c:1527
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 17:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook mm/slub.c:1494 [inline]
slab_free mm/slub.c:3080 [inline]
kfree+0x123/0x370 mm/slub.c:4071
__rcu_reclaim kernel/rcu/rcu.h:222 [inline]
rcu_do_batch+0x492/0xa00 kernel/rcu/tree.c:2167
rcu_core+0x4c8/0xcb0 kernel/rcu/tree.c:2387
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
The buggy address belongs to the object at ffff8881ef347000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 984 bytes inside of
1024-byte region [ffff8881ef347000, ffff8881ef347400)
The buggy address is located 984 bytes inside of
The buggy address belongs to the page:
page:ffffea0007bcd000 refcount:1 mapcount:0 mapping:ffff8881f5c02280 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c02280
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC)
page_owner tracks the page as allocated
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
alloc_slab_page+0x39/0x3c0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x440 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x2fe/0x490 mm/slub.c:2667
__slab_alloc+0x62/0xa0 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
__kmalloc+0x19b/0x2e0 mm/slub.c:3909
__kmalloc_node include/linux/slab.h:422 [inline]
kmalloc_node include/linux/slab.h:599 [inline]
kzalloc_node include/linux/slab.h:701 [inline]
blk_mq_alloc_hctx block/blk-mq.c:2498 [inline]
blk_mq_alloc_and_init_hctx block/blk-mq.c:2918 [inline]
blk_mq_realloc_hw_ctxs+0x303/0x13b0 block/blk-mq.c:2954
blk_mq_init_allocated_queue+0x52d/0x1990 block/blk-mq.c:3035
blk_mq_init_queue+0x49/0xa0 block/blk-mq.c:2857
scsi_mq_alloc_queue+0x40/0x110 drivers/scsi/scsi_lib.c:1881
scsi_alloc_sdev+0x654/0x960 drivers/scsi/scsi_scan.c:269
scsi_probe_and_add_lun+0x1aa/0x4010 drivers/scsi/scsi_scan.c:1079
__scsi_scan_target+0x1fb/0xe80 drivers/scsi/scsi_scan.c:1562
scsi_scan_channel drivers/scsi/scsi_scan.c:1650 [inline]
scsi_scan_host_selected+0x349/0x620 drivers/scsi/scsi_scan.c:1679
page_owner free stack trace missing
Memory state around the buggy address:
ffff8881ef347300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881ef347380: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
syzbot
Jan 30, 2025, 9:52:25 PM1/30/25
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: d1a25a6a4b3b Merge branch 'android13-5.15' into android13-..
syzbot found the following issue on:
git tree: android13-5.15-lts
console+strace: https://syzkaller.appspot.com/x/log.txt?x=156df324580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4793178448d1e380
dashboard link: https://syzkaller.appspot.com/bug?extid=f0208e23cec601282501
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=15b876b0580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=138ce5f8580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1a1b1d2652d4/disk-d1a25a6a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7c5899e5c53e/vmlinux-d1a25a6a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2daea3c964d0/bzImage-d1a25a6a.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
==================================================================
BUG: KASAN: slab-out-of-bounds in xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:853
Read of size 1 at addr ffff88810cc3cbf8 by task syz-executor221/294
CPU: 1 PID: 294 Comm: syz-executor221 Not tainted 5.15.176-syzkaller-00066-gd1a25a6a4b3b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
<TASK>
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
print_address_description+0x87/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:444
__asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:853
xfrm_policy_inexact_node_merge net/xfrm/xfrm_policy.c:985 [inline]
xfrm_policy_inexact_insert_node+0x917/0xb00 net/xfrm/xfrm_policy.c:1041
xfrm_policy_inexact_alloc_chain+0x4ec/0xaf0 net/xfrm/xfrm_policy.c:1157
xfrm_policy_inexact_insert+0x6a/0x1160 net/xfrm/xfrm_policy.c:1200
xfrm_policy_insert+0xe7/0x940 net/xfrm/xfrm_policy.c:1583
xfrm_add_policy+0x4f2/0x980 net/xfrm/xfrm_user.c:1832
xfrm_policy_inexact_list_reinsert+0x5b0/0x660 net/xfrm/xfrm_policy.c:853
xfrm_policy_inexact_node_merge net/xfrm/xfrm_policy.c:985 [inline]
xfrm_policy_inexact_insert_node+0x917/0xb00 net/xfrm/xfrm_policy.c:1041
xfrm_policy_inexact_alloc_chain+0x4ec/0xaf0 net/xfrm/xfrm_policy.c:1157
xfrm_policy_inexact_insert+0x6a/0x1160 net/xfrm/xfrm_policy.c:1200
xfrm_policy_insert+0xe7/0x940 net/xfrm/xfrm_policy.c:1583
xfrm_user_rcv_msg+0x4f3/0x7d0 net/xfrm/xfrm_user.c:2981
netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2493
xfrm_netlink_rcv+0x72/0x90 net/xfrm/xfrm_user.c:3003
netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline]
netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1341
netlink_sendmsg+0xa0a/0xd20 net/netlink/af_netlink.c:1909
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436
___sys_sendmsg+0x252/0x2e0 net/socket.c:2490
__sys_sendmsg net/socket.c:2519 [inline]
__do_sys_sendmsg net/socket.c:2528 [inline]
__se_sys_sendmsg+0x19a/0x260 net/socket.c:2526
__x64_sys_sendmsg+0x7b/0x90 net/socket.c:2526
x64_sys_call+0x16a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc2d688dbe9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffebe18c0e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffebe18c2b8 RCX: 00007fc2d688dbe9
RDX: 0000000000004000 RSI: 0000000020000580 RDI: 0000000000000005
RBP: 00007fc2d6901610 R08: 00007ffebe18c2b8 R09: 00007ffebe18c2b8
R10: 000000000000000a R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffebe18c2a8 R14: 0000000000000001 R15: 0000000000000001
</TASK>
Allocated by task 294:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:433 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521
kasan_kmalloc include/linux/kasan.h:227 [inline]
__kmalloc+0x13f/0x2c0 mm/slub.c:4431
kmalloc include/linux/slab.h:608 [inline]
sk_prot_alloc+0xf9/0x330 net/core/sock.c:1868
sk_alloc+0x38/0x430 net/core/sock.c:1925
pfkey_create+0x12c/0x620 net/key/af_key.c:152
__sock_create+0x3be/0x7e0 net/socket.c:1486
sock_create net/socket.c:1542 [inline]
__sys_socket+0x132/0x370 net/socket.c:1584
__do_sys_socket net/socket.c:1593 [inline]
__se_sys_socket net/socket.c:1591 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1591
x64_sys_call+0x147/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:42
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff88810cc3c800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 1016 bytes inside of
1024-byte region [ffff88810cc3c800, ffff88810cc3cc00)
The buggy address belongs to the page:
page:ffffea0004330e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10cc38
head:ffffea0004330e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 289, ts 22266998997, free_ts 17927860872
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605
prep_new_page+0x1b/0x110 mm/page_alloc.c:2611
get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485
__alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5780
allocate_slab mm/slub.c:1932 [inline]
new_slab+0x9a/0x4e0 mm/slub.c:1995
___slab_alloc+0x39e/0x830 mm/slub.c:3028
__slab_alloc+0x4a/0x90 mm/slub.c:3115
slab_alloc_node mm/slub.c:3206 [inline]
slab_alloc mm/slub.c:3250 [inline]
__kmalloc_track_caller+0x171/0x2c0 mm/slub.c:4949
kmalloc_reserve net/core/skbuff.c:357 [inline]
__alloc_skb+0x10c/0x550 net/core/skbuff.c:428
alloc_skb_fclone include/linux/skbuff.h:1233 [inline]
sk_stream_alloc_skb+0x1f8/0xad0 net/ipv4/tcp.c:889
tcp_sendmsg_locked+0xd34/0x3a90 net/ipv4/tcp.c:1314
tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1457
inet_sendmsg+0xa1/0xc0 net/ipv4/af_inet.c:830
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
sock_write_iter+0x39b/0x530 net/socket.c:1079
call_write_iter include/linux/fs.h:2206 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xd5d/0x1110 fs/read_write.c:594
ksys_write+0x199/0x2c0 fs/read_write.c:647
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1472 [inline]
free_pcp_prepare mm/page_alloc.c:1544 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534
free_unref_page+0xe8/0x750 mm/page_alloc.c:3616
free_the_page mm/page_alloc.c:805 [inline]
__free_pages+0x61/0xf0 mm/page_alloc.c:5856
__free_slab+0xec/0x1d0 mm/slub.c:2020
free_slab mm/slub.c:2035 [inline]
discard_slab mm/slub.c:2041 [inline]
__unfreeze_partials+0x165/0x1a0 mm/slub.c:2527
put_cpu_partial+0xc4/0x120 mm/slub.c:2607
__slab_free+0x1c8/0x290 mm/slub.c:3390
do_slab_free mm/slub.c:3509 [inline]
___cache_free+0x109/0x120 mm/slub.c:3530
qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
slab_alloc_node mm/slub.c:3240 [inline]
slab_alloc mm/slub.c:3250 [inline]
kmem_cache_alloc+0xf5/0x250 mm/slub.c:3255
getname_flags+0xba/0x520 fs/namei.c:138
user_path_at_empty+0x2d/0x1a0 fs/namei.c:2882
Memory state around the buggy address:
ffff88810cc3cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88810cc3cb80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
^
ffff88810cc3cc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88810cc3cc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
================================================================
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