[v6.1] KASAN: use-after-free Read in xsk_diag_dump
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syzbot
Aug 26, 2023, 5:22:52 PM8/26/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: cd363bb9548e Linux 6.1.48
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11ddfeb7a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=8b0031246c5324f8
dashboard link: https://syzkaller.appspot.com/bug?extid=792a78db83561ea94a48
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/9079b0aadfce/disk-cd363bb9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0def642f493c/vmlinux-cd363bb9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e5b64af6c613/bzImage-cd363bb9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+792a78...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline]
BUG: KASAN: use-after-free in xsk_diag_fill net/xdp/xsk_diag.c:114 [inline]
BUG: KASAN: use-after-free in xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163
Read of size 4 at addr ffff8880865060d8 by task syz-executor.3/12815
CPU: 1 PID: 12815 Comm: syz-executor.3 Not tainted 6.1.48-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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
xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline]
xsk_diag_fill net/xdp/xsk_diag.c:114 [inline]
xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163
netlink_dump+0x603/0xc50 net/netlink/af_netlink.c:2260
__netlink_dump_start+0x532/0x6f0 net/netlink/af_netlink.c:2365
netlink_dump_start include/linux/netlink.h:269 [inline]
xsk_diag_handler_dump+0x1d5/0x260 net/xdp/xsk_diag.c:190
sock_diag_rcv_msg+0xd5/0x400
netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2525
sock_diag_rcv+0x26/0x40 net/core/sock_diag.c:277
netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline]
netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1354
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1903
sock_sendmsg_nosec net/socket.c:716 [inline]
sock_sendmsg net/socket.c:736 [inline]
sock_write_iter+0x394/0x4e0 net/socket.c:1113
do_iter_write+0x6e6/0xc50 fs/read_write.c:861
vfs_writev fs/read_write.c:934 [inline]
do_writev+0x27b/0x460 fs/read_write.c:977
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+0x63/0xcd
RIP: 0033:0x7f7287c7cae9
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:00007f7288a210c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f7287d9bf80 RCX: 00007f7287c7cae9
RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f7287cc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7287d9bf80 R15: 00007ffeed6955a8
</TASK>
Allocated by task 11451:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x50/0x370 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
getname_flags+0xb8/0x4e0 fs/namei.c:139
do_sys_openat2+0xd2/0x500 fs/open.c:1312
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1345
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+0x63/0xcd
Freed by task 11451:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0x292/0x510 mm/slub.c:3683
do_sys_openat2+0x42b/0x500 fs/open.c:1327
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1345
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+0x63/0xcd
The buggy address belongs to the object at ffff888086505500
which belongs to the cache names_cache of size 4096
The buggy address is located 3032 bytes inside of
4096-byte region [ffff888086505500, ffff888086506500)
The buggy address belongs to the physical page:
page:ffffea0002194000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x86500
head:ffffea0002194000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888140009640
raw: 0000000000000000 0000000000070007 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 11451, tgid 11451 (udevd), ts 853455788699, free_ts 851617877252
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2533
prep_new_page mm/page_alloc.c:2540 [inline]
get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5559
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+0xa71/0x1080 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x1a5/0x2d0 mm/slub.c:3422
getname_flags+0xb8/0x4e0 fs/namei.c:139
user_path_at_empty+0x2a/0x180 fs/namei.c:2875
do_readlinkat+0x114/0x3a0 fs/stat.c:468
__do_sys_readlink fs/stat.c:501 [inline]
__se_sys_readlink fs/stat.c:498 [inline]
__x64_sys_readlink+0x7b/0x90 fs/stat.c:498
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+0x63/0xcd
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1460 [inline]
free_pcp_prepare mm/page_alloc.c:1510 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388
free_unref_page+0x98/0x570 mm/page_alloc.c:3484
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+0x116/0x180 mm/slub.c:2662
qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x162/0x180 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+0x50/0x370 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
getname_flags+0xb8/0x4e0 fs/namei.c:139
vfs_fstatat fs/stat.c:266 [inline]
__do_sys_newfstatat fs/stat.c:437 [inline]
__se_sys_newfstatat fs/stat.c:431 [inline]
__x64_sys_newfstatat+0x130/0x1e0 fs/stat.c:431
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+0x63/0xcd
Memory state around the buggy address:
ffff888086505f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888086506000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888086506080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888086506100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888086506180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
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If the bug is already fixed, let syzbot know by replying with:
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If you want to overwrite bug's subsystems, reply with:
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If the bug is a duplicate of another bug, reply with:
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If you want to undo deduplication, reply with:
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syzbot found the following issue on:
HEAD commit: cd363bb9548e Linux 6.1.48
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11ddfeb7a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=8b0031246c5324f8
dashboard link: https://syzkaller.appspot.com/bug?extid=792a78db83561ea94a48
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/9079b0aadfce/disk-cd363bb9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0def642f493c/vmlinux-cd363bb9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e5b64af6c613/bzImage-cd363bb9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+792a78...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline]
BUG: KASAN: use-after-free in xsk_diag_fill net/xdp/xsk_diag.c:114 [inline]
BUG: KASAN: use-after-free in xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163
Read of size 4 at addr ffff8880865060d8 by task syz-executor.3/12815
CPU: 1 PID: 12815 Comm: syz-executor.3 Not tainted 6.1.48-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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
xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline]
xsk_diag_fill net/xdp/xsk_diag.c:114 [inline]
xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163
netlink_dump+0x603/0xc50 net/netlink/af_netlink.c:2260
__netlink_dump_start+0x532/0x6f0 net/netlink/af_netlink.c:2365
netlink_dump_start include/linux/netlink.h:269 [inline]
xsk_diag_handler_dump+0x1d5/0x260 net/xdp/xsk_diag.c:190
sock_diag_rcv_msg+0xd5/0x400
netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2525
sock_diag_rcv+0x26/0x40 net/core/sock_diag.c:277
netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline]
netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1354
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1903
sock_sendmsg_nosec net/socket.c:716 [inline]
sock_sendmsg net/socket.c:736 [inline]
sock_write_iter+0x394/0x4e0 net/socket.c:1113
do_iter_write+0x6e6/0xc50 fs/read_write.c:861
vfs_writev fs/read_write.c:934 [inline]
do_writev+0x27b/0x460 fs/read_write.c:977
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+0x63/0xcd
RIP: 0033:0x7f7287c7cae9
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:00007f7288a210c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f7287d9bf80 RCX: 00007f7287c7cae9
RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f7287cc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7287d9bf80 R15: 00007ffeed6955a8
</TASK>
Allocated by task 11451:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x50/0x370 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
getname_flags+0xb8/0x4e0 fs/namei.c:139
do_sys_openat2+0xd2/0x500 fs/open.c:1312
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1345
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+0x63/0xcd
Freed by task 11451:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0x292/0x510 mm/slub.c:3683
do_sys_openat2+0x42b/0x500 fs/open.c:1327
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1345
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+0x63/0xcd
The buggy address belongs to the object at ffff888086505500
which belongs to the cache names_cache of size 4096
The buggy address is located 3032 bytes inside of
4096-byte region [ffff888086505500, ffff888086506500)
The buggy address belongs to the physical page:
page:ffffea0002194000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x86500
head:ffffea0002194000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888140009640
raw: 0000000000000000 0000000000070007 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 11451, tgid 11451 (udevd), ts 853455788699, free_ts 851617877252
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2533
prep_new_page mm/page_alloc.c:2540 [inline]
get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5559
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+0xa71/0x1080 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x1a5/0x2d0 mm/slub.c:3422
getname_flags+0xb8/0x4e0 fs/namei.c:139
user_path_at_empty+0x2a/0x180 fs/namei.c:2875
do_readlinkat+0x114/0x3a0 fs/stat.c:468
__do_sys_readlink fs/stat.c:501 [inline]
__se_sys_readlink fs/stat.c:498 [inline]
__x64_sys_readlink+0x7b/0x90 fs/stat.c:498
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+0x63/0xcd
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1460 [inline]
free_pcp_prepare mm/page_alloc.c:1510 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388
free_unref_page+0x98/0x570 mm/page_alloc.c:3484
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+0x116/0x180 mm/slub.c:2662
qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x162/0x180 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+0x50/0x370 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
getname_flags+0xb8/0x4e0 fs/namei.c:139
vfs_fstatat fs/stat.c:266 [inline]
__do_sys_newfstatat fs/stat.c:437 [inline]
__se_sys_newfstatat fs/stat.c:431 [inline]
__x64_sys_newfstatat+0x130/0x1e0 fs/stat.c:431
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+0x63/0xcd
Memory state around the buggy address:
ffff888086505f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888086506000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888086506080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888086506100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888086506180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
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syzbot
Aug 30, 2023, 8:02:53 AM8/30/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 5ddfe5cc8716 Linux 5.15.128
syzbot found the following issue on:
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=172eab18680000
kernel config: https://syzkaller.appspot.com/x/.config?x=1b6ad98d397fbe23
dashboard link: https://syzkaller.appspot.com/bug?extid=4132131bd0924c752121
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/9a542b09fbaf/disk-5ddfe5cc.raw.xz
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
vmlinux: https://storage.googleapis.com/syzbot-assets/4452fc1a4542/vmlinux-5ddfe5cc.xz
kernel image: https://storage.googleapis.com/syzbot-assets/90dc6d0c61df/bzImage-5ddfe5cc.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
==================================================================
BUG: KASAN: use-after-free in xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline]
BUG: KASAN: use-after-free in xsk_diag_fill net/xdp/xsk_diag.c:114 [inline]
BUG: KASAN: use-after-free in xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163
CPU: 0 PID: 23920 Comm: syz-executor.5 Not tainted 5.15.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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
xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline]
xsk_diag_fill net/xdp/xsk_diag.c:114 [inline]
xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163
netlink_dump+0x606/0xc40 net/netlink/af_netlink.c:2279
xsk_diag_fill net/xdp/xsk_diag.c:114 [inline]
xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163
__netlink_dump_start+0x52f/0x6f0 net/netlink/af_netlink.c:2384
netlink_dump_start include/linux/netlink.h:258 [inline]
xsk_diag_handler_dump+0x1d5/0x260 net/xdp/xsk_diag.c:190
sock_diag_rcv_msg+0xd5/0x400
netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2505
sock_diag_rcv+0x26/0x40 net/core/sock_diag.c:276
netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1356
netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1924
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg net/socket.c:724 [inline]
sock_write_iter+0x39b/0x530 net/socket.c:1060
do_iter_readv_writev+0x594/0x7a0
do_iter_write+0x1ea/0x760 fs/read_write.c:855
vfs_writev fs/read_write.c:928 [inline]
do_writev+0x281/0x470 fs/read_write.c:971
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
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
RIP: 0033:0x7f2340a27ae9
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:00007f233efa90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f2340b46f80 RCX: 00007f2340a27ae9
RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00007f2340a7347a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f2340b46f80 R15: 00007ffc20de4038
</TASK>
Allocated by task 7635:
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_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
xfs_trans_dup+0xba/0x620 fs/xfs/xfs_trans.c:98
xfs_trans_roll+0x11c/0x4b0 fs/xfs/xfs_trans.c:1000
xfs_defer_trans_roll+0x46f/0x990 fs/xfs/libxfs/xfs_defer.c:297
xfs_defer_finish_noroll+0x3f6/0x1df0 fs/xfs/libxfs/xfs_defer.c:483
__xfs_trans_commit+0x4d1/0xdd0 fs/xfs/xfs_trans.c:852
xfs_iomap_write_unwritten+0x602/0xbf0 fs/xfs/xfs_iomap.c:580
xfs_end_ioend+0x239/0x670 fs/xfs/xfs_aops.c:130
xfs_end_io+0x2e1/0x360 fs/xfs/xfs_aops.c:159
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
The buggy address belongs to the object at ffff888015fe4000
which belongs to the cache xfs_trans of size 232
The buggy address is located 208 bytes inside of
232-byte region [ffff888015fe4000, ffff888015fe40e8)
The buggy address belongs to the page:
page:ffffea000057f900 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888015fe4378 pfn:0x15fe4
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 0000000100000001 ffff8881466313c0
raw: ffff888015fe4378 00000000800d0000 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 13604, ts 1020344626222, free_ts 1020337276562
page_owner tracks the page as allocated
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]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
xfs_trans_alloc+0x7d/0x7f0 fs/xfs/xfs_trans.c:266
xfs_trans_alloc_inode+0x129/0x450 fs/xfs/xfs_trans.c:1047
xfs_attr_set+0x848/0x1460 fs/xfs/libxfs/xfs_attr.c:772
__xfs_set_acl+0x251/0x3d0 fs/xfs/xfs_acl.c:205
xfs_set_acl+0x267/0x650 fs/xfs/xfs_acl.c:271
set_posix_acl fs/posix_acl.c:947 [inline]
posix_acl_xattr_set+0x33b/0x3a0 fs/posix_acl.c:966
__vfs_removexattr+0x3ce/0x410 fs/xattr.c:470
__vfs_removexattr_locked+0x1fe/0x410 fs/xattr.c:505
vfs_removexattr+0xff/0x2a0 fs/xattr.c:527
ovl_workdir_create+0x4f1/0x7d0 fs/overlayfs/super.c:823
ovl_get_indexdir+0x182/0x450 fs/overlayfs/super.c:1556
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_list+0x1f7/0x8e0 mm/page_alloc.c:3433
release_pages+0x1bb9/0x1f40 mm/swap.c:963
__pagevec_release+0x80/0xf0 mm/swap.c:983
pagevec_release include/linux/pagevec.h:81 [inline]
truncate_inode_pages_range+0x48b/0x1290 mm/truncate.c:329
kill_bdev block/bdev.c:77 [inline]
blkdev_flush_mapping+0x182/0x340 block/bdev.c:659
blkdev_put_whole block/bdev.c:690 [inline]
blkdev_put+0x4f1/0x790 block/bdev.c:954
deactivate_locked_super+0xa0/0x110 fs/super.c:335
cleanup_mnt+0x44e/0x500 fs/namespace.c:1143
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Memory state around the buggy address:
ffff888015fe4000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888015fe4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
^
ffff888015fe4100: fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb
ffff888015fe4180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
syzbot
Dec 9, 2023, 1:57:13 PM12/9/23
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
syzbot
Dec 15, 2023, 10:15:19 PM12/15/23
to syzkaller...@googlegroups.com
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