From: syzbot <[email protected]>
To: [email protected], [email protected],
[email protected], [email protected],
[email protected]
Subject: [syzbot] KASAN: use-after-free Read in io_wqe_worker (2)
Date: Sun, 08 Jan 2023 22:03:44 -0800 [thread overview]
Message-ID: <[email protected]> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 9b43a525db12 Merge tag 'nfs-for-6.2-2' of git://git.linux-..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=161784d2480000
kernel config: https://syzkaller.appspot.com/x/.config?x=ff5cf657dd0e7643
dashboard link: https://syzkaller.appspot.com/bug?extid=ad53b671c30ddaba634d
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=160480ba480000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14cddc6a480000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ddf8271f0077/disk-9b43a525.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5a43fe665720/vmlinux-9b43a525.xz
kernel image: https://storage.googleapis.com/syzbot-assets/323f0f0f7267/bzImage-9b43a525.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xec/0x110 lib/list_debug.c:62
Read of size 8 at addr ffff88807ba8f020 by task iou-wrk-10331/10338
CPU: 0 PID: 10338 Comm: iou-wrk-10331 Not tainted 6.2.0-rc2-syzkaller-00313-g9b43a525db12 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:306 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:417
kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
__list_del_entry_valid+0xec/0x110 lib/list_debug.c:62
__list_del_entry include/linux/list.h:134 [inline]
list_del_rcu include/linux/rculist.h:157 [inline]
io_worker_exit io_uring/io-wq.c:229 [inline]
io_wqe_worker+0x852/0xe40 io_uring/io-wq.c:661
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Allocated by task 10331:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:371 [inline]
____kasan_kmalloc mm/kasan/common.c:330 [inline]
__kasan_kmalloc+0xa5/0xb0 mm/kasan/common.c:380
kmalloc_node include/linux/slab.h:606 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
create_io_worker+0x10c/0x630 io_uring/io-wq.c:801
io_wqe_create_worker io_uring/io-wq.c:310 [inline]
io_wqe_enqueue+0x6c3/0xbc0 io_uring/io-wq.c:936
io_queue_iowq+0x282/0x5c0 io_uring/io_uring.c:475
io_queue_sqe_fallback+0xf3/0x190 io_uring/io_uring.c:2059
io_submit_sqe io_uring/io_uring.c:2281 [inline]
io_submit_sqes+0x11db/0x1e60 io_uring/io_uring.c:2397
__do_sys_io_uring_enter+0xc1d/0x2540 io_uring/io_uring.c:3345
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488
task_work_add+0x7f/0x2c0 kernel/task_work.c:48
io_queue_worker_create+0x41d/0x660 io_uring/io-wq.c:373
io_wqe_dec_running+0x1e4/0x240 io_uring/io-wq.c:410
io_wq_worker_sleeping+0xa6/0xc0 io_uring/io-wq.c:698
sched_submit_work kernel/sched/core.c:6597 [inline]
schedule+0x16e/0x1b0 kernel/sched/core.c:6628
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6690
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
io_ring_submit_lock io_uring/io_uring.h:215 [inline]
io_file_get_fixed io_uring/io_uring.c:1966 [inline]
io_assign_file io_uring/io_uring.c:1834 [inline]
io_assign_file io_uring/io_uring.c:1828 [inline]
io_wq_submit_work+0x5f7/0xdc0 io_uring/io_uring.c:1916
io_worker_handle_work+0xc41/0x1c60 io_uring/io-wq.c:587
io_wqe_worker+0xa5b/0xe40 io_uring/io-wq.c:632
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to the object at ffff88807ba8f000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 32 bytes inside of
512-byte region [ffff88807ba8f000, ffff88807ba8f200)
The buggy address belongs to the physical page:
page:ffffea0001eea300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ba8c
head:ffffea0001eea300 order:2 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff888012441c80 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 10143, tgid 10077 (syz-executor429), ts 196666481357, free_ts 195660604482
prep_new_page mm/page_alloc.c:2531 [inline]
get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283
__alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549
__alloc_pages_node include/linux/gfp.h:237 [inline]
alloc_slab_page mm/slub.c:1853 [inline]
allocate_slab+0xa7/0x350 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3193
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
__slab_alloc_node mm/slub.c:3345 [inline]
slab_alloc_node mm/slub.c:3442 [inline]
__kmem_cache_alloc_node+0x1a4/0x430 mm/slub.c:3491
kmalloc_node_trace+0x21/0x60 mm/slab_common.c:1075
kmalloc_node include/linux/slab.h:606 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
create_io_worker+0x10c/0x630 io_uring/io-wq.c:801
io_wqe_create_worker io_uring/io-wq.c:310 [inline]
io_wqe_enqueue+0x6c3/0xbc0 io_uring/io-wq.c:936
io_queue_iowq+0x282/0x5c0 io_uring/io_uring.c:475
io_queue_sqe_fallback+0xf3/0x190 io_uring/io_uring.c:2059
io_submit_sqe io_uring/io_uring.c:2281 [inline]
io_submit_sqes+0x11db/0x1e60 io_uring/io_uring.c:2397
__do_sys_io_uring_enter+0xc1d/0x2540 io_uring/io_uring.c:3345
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 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:1446 [inline]
free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1496
free_unref_page_prepare mm/page_alloc.c:3369 [inline]
free_unref_page+0x1d/0x490 mm/page_alloc.c:3464
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:302
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:761 [inline]
slab_alloc_node mm/slub.c:3452 [inline]
slab_alloc mm/slub.c:3460 [inline]
__kmem_cache_alloc_lru mm/slub.c:3467 [inline]
kmem_cache_alloc+0x1e4/0x430 mm/slub.c:3476
kmem_cache_zalloc include/linux/slab.h:710 [inline]
taskstats_tgid_alloc kernel/taskstats.c:583 [inline]
taskstats_exit+0x5f3/0xb80 kernel/taskstats.c:622
do_exit+0x822/0x2950 kernel/exit.c:852
do_group_exit+0xd4/0x2a0 kernel/exit.c:1012
__do_sys_exit_group kernel/exit.c:1023 [inline]
__se_sys_exit_group kernel/exit.c:1021 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1021
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff88807ba8ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807ba8ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807ba8f000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ba8f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ba8f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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next reply other threads:[~2023-01-09 6:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-09 6:03 syzbot [this message]
2023-01-09 13:09 ` [syzbot] KASAN: use-after-free Read in io_wqe_worker (2) Pavel Begunkov
2023-01-09 18:55 ` syzbot
2023-03-11 15:15 ` [syzbot] [io-uring?] " syzbot
2023-03-15 12:20 ` Aleksandr Nogikh
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