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Subject[syzbot] KASAN: use-after-free Read in pipe_release
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Hello,

syzbot found the following issue on:

HEAD commit: cb71b93c2dc3 Add linux-next specific files for 20220628
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10e58ff4080000
kernel config: https://syzkaller.appspot.com/x/.config?x=badbc1adb2d582eb
dashboard link: https://syzkaller.appspot.com/bug?extid=2c2316612d8ce40d6e4a
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2c2316612d8ce40d6e4a@syzkaller.appspotmail.com

==================================================================
BUG: KASAN: use-after-free in __wake_up_common+0x637/0x650 kernel/sched/wait.c:100
Read of size 8 at addr ffff88807b2f09b0 by task syz-executor.5/8273

CPU: 0 PID: 8273 Comm: syz-executor.5 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:317 [inline]
print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
kasan_report+0xbe/0x1f0 mm/kasan/report.c:495
__wake_up_common+0x637/0x650 kernel/sched/wait.c:100
__wake_up_common_lock+0xd0/0x130 kernel/sched/wait.c:137
pipe_release+0x188/0x310 fs/pipe.c:728
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xaf1/0x29f0 kernel/exit.c:795
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x2542/0x2600 kernel/signal.c:2857
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fbb65e89109
Code: Unable to access opcode bytes at RIP 0x7fbb65e890df.
RSP: 002b:00007fbb67042168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002fe RBX: 00007fbb65f9c100 RCX: 00007fbb65e89109
RDX: 0000000001000000 RSI: 00000000000002fe RDI: 0000000000000007
RBP: 00007fbb65ee305d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe29a8142f R14: 00007fbb67042300 R15: 0000000000022000
</TASK>

Allocated by task 8273:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
____kasan_kmalloc mm/kasan/common.c:515 [inline]
____kasan_kmalloc mm/kasan/common.c:474 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524
kmalloc include/linux/slab.h:600 [inline]
__io_queue_proc+0x2dc/0x950 io_uring/poll.c:429
poll_wait include/linux/poll.h:49 [inline]
pipe_poll+0x294/0x7d0 fs/pipe.c:667
vfs_poll include/linux/poll.h:88 [inline]
__io_arm_poll_handler+0x488/0x1060 io_uring/poll.c:511
io_arm_poll_handler+0x5c6/0xce0 io_uring/poll.c:638
io_queue_async+0xc1/0x3e0 io_uring/io_uring.c:1753
io_queue_sqe io_uring/io_uring.c:1787 [inline]
io_submit_sqe io_uring/io_uring.c:2036 [inline]
io_submit_sqes+0x15fc/0x1ec0 io_uring/io_uring.c:2147
__do_sys_io_uring_enter+0xb85/0x1eb0 io_uring/io_uring.c:3087
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0

Freed by task 8273:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:200 [inline]
slab_free_hook mm/slub.c:1754 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780
slab_free mm/slub.c:3534 [inline]
kfree+0xe2/0x4d0 mm/slub.c:4562
io_clean_op+0x1b1/0xa40 io_uring/io_uring.c:1555
io_dismantle_req io_uring/io_uring.c:930 [inline]
__io_req_complete_put+0x649/0x8b0 io_uring/io_uring.c:801
__io_req_complete_post io_uring/io_uring.c:812 [inline]
io_req_complete_post+0x98/0x260 io_uring/io_uring.c:820
handle_tw_list+0xa8/0x420 io_uring/io_uring.c:1009
tctx_task_work+0x11b/0x420 io_uring/io_uring.c:1062
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
get_signal+0x1c5/0x2600 kernel/signal.c:2634
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0

The buggy address belongs to the object at ffff88807b2f0980
which belongs to the cache kmalloc-64 of size 64
The buggy address is located 48 bytes inside of
64-byte region [ffff88807b2f0980, ffff88807b2f09c0)

The buggy address belongs to the physical page:
page:ffffea0001ecbc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7b2f0
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888011841640
raw: 0000000000000000 0000000000200020 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 0x112820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 4744, tgid 4744 (kworker/u4:22), ts 430287601091, free_ts 430006695756
prep_new_page mm/page_alloc.c:2535 [inline]
get_page_from_freelist+0x210d/0x3a30 mm/page_alloc.c:4282
__alloc_pages+0x1c7/0x510 mm/page_alloc.c:5506
alloc_pages+0x1aa/0x310 mm/mempolicy.c:2280
alloc_slab_page mm/slub.c:1824 [inline]
allocate_slab+0x27e/0x3d0 mm/slub.c:1969
new_slab mm/slub.c:2029 [inline]
___slab_alloc+0x89d/0xef0 mm/slub.c:3031
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118
slab_alloc_node mm/slub.c:3209 [inline]
slab_alloc mm/slub.c:3251 [inline]
__kmalloc+0x3a2/0x450 mm/slub.c:4420
kmalloc include/linux/slab.h:605 [inline]
ieee802_11_parse_elems_crc+0x14d/0x1050 net/mac80211/util.c:1508
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2269 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1606 [inline]
ieee80211_ibss_rx_queued_mgmt+0xc82/0x30d0 net/mac80211/ibss.c:1640
ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline]
ieee80211_iface_work+0xa7f/0xd20 net/mac80211/iface.c:1648
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1453 [inline]
free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1503
free_unref_page_prepare mm/page_alloc.c:3383 [inline]
free_unref_page+0x19/0x4d0 mm/page_alloc.c:3479
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2548
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446
kasan_slab_alloc include/linux/kasan.h:224 [inline]
slab_post_alloc_hook mm/slab.h:736 [inline]
slab_alloc_node mm/slub.c:3243 [inline]
slab_alloc mm/slub.c:3251 [inline]
__kmem_cache_alloc_lru mm/slub.c:3258 [inline]
kmem_cache_alloc+0x2d6/0x4c0 mm/slub.c:3268
kmem_cache_zalloc include/linux/slab.h:723 [inline]
alloc_buffer_head+0x20/0x140 fs/buffer.c:2973
jbd2_journal_write_metadata_buffer+0xcc/0xba0 fs/jbd2/journal.c:364
jbd2_journal_commit_transaction+0x173b/0x6a70 fs/jbd2/commit.c:700
kjournald2+0x1d0/0x930 fs/jbd2/journal.c:213
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302

Memory state around the buggy address:
ffff88807b2f0880: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
ffff88807b2f0900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88807b2f0980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
^
ffff88807b2f0a00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff88807b2f0a80: fa fb fb fb fb fb fb fb 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.
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syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

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