Re: [syzbot] WARNING in io_cqring_event_overflow

syzbot
2023-01-12T11:05:25Z

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in io_cqring_event_overflow

------------[ cut here ]------------
WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:
CPU: 1 PID: 2836 Comm: kworker/u4:4 Not tainted 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0
x28: ffff0000c655e578
x27: ffff80000d49b000

x26: 0000000000000000
x25: 0000000000000000
x24: 0000000000000000

x23: 0000000000000000
x22: 0000000000000000
x21: 0000000000000000

x20: 0000000000000000
x19: ffff0000d1727000
x18: 00000000000000c0

x17: ffff80000df48158
x16: ffff80000dd86118
x15: ffff0000c60dce00

x14: 0000000000000110
x13: 00000000ffffffff
x12: ffff0000c60dce00

x11: ff808000095945e8
x10: 0000000000000000
x9 : ffff8000095945e8

x8 : ffff0000c60dce00
x7 : ffff80000c1090e0
x6 : 0000000000000000

x5 : 0000000000000000
x4 : 0000000000000000
x3 : 0000000000000000

x2 : 0000000000000000
x1 : 0000000000000000
x0 : 0000000000000000

Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 576210
hardirqs last enabled at (576209): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (576209): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (576210): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (576168): [<ffff80000bfd4634>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last enabled at (576168): [<ffff80000bfd4634>] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471
softirqs last disabled at (576166): [<ffff80000bfd44c4>] spin_lock_bh include/linux/spinlock.h:355 [inline]
softirqs last disabled at (576166): [<ffff80000bfd44c4>] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:

CPU: 0 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work

pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0
x28: ffff0000c3a36f78
x27: ffff80000d49b000

x26: 0000000000000000
x25: 0000000000000000
x24: 0000000000000000

x23: 0000000000000000
x22: 0000000000000000
x21: 0000000000000000

x20: 0000000000000000
x19: ffff0000c70e9000
x18: 0000000000000232

x17: ffff80000c15d8bc
x16: ffff80000dd86118
x15: ffff0000c60dce00

x14: 0000000000000110
x13: 00000000ffffffff
x12: ffff0000c60dce00

x11: ff808000095945e8
x10: 0000000000000000
x9 : ffff8000095945e8

x8 : ffff0000c60dce00
x7 : ffff80000c1090e0
x6 : 0000000000000000

x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 587416
hardirqs last enabled at (587415): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (587415): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (587416): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (587360): [<ffff80000bfd4634>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last enabled at (587360): [<ffff80000bfd4634>] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471
softirqs last disabled at (587358): [<ffff80000bfd44c4>] spin_lock_bh include/linux/spinlock.h:355 [inline]
softirqs last disabled at (587358): [<ffff80000bfd44c4>] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:
CPU: 0 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0 x28: ffff0000cc27dc78 x27: ffff80000d49b000
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: ffff0000c60f2000 x18: 0000000000000364
x17: ffff80000c15d8bc x16: ffff80000dd86118 x15: ffff0000c60dce00
x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00
x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8
x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 588956
hardirqs last enabled at (588955): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (588955): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (588956): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (587754): [<ffff80000b811ff8>] sock_orphan include/net/sock.h:2098 [inline]
softirqs last enabled at (587754): [<ffff80000b811ff8>] unix_release_sock+0x15c/0x544 net/unix/af_unix.c:604
softirqs last disabled at (587752): [<ffff80000b811fdc>] sock_orphan include/net/sock.h:2094 [inline]
softirqs last disabled at (587752): [<ffff80000b811fdc>] unix_release_sock+0x140/0x544 net/unix/af_unix.c:604
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:

CPU: 1 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work

pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0
x28: ffff0000cc1fb478
x27: ffff80000d49b000

x26: 0000000000000000
x25: 0000000000000000
x24: 0000000000000000

x23: 0000000000000000
x22: 0000000000000000
x21: 0000000000000000

x20: 0000000000000000
x19: ffff0000c7bf0000
x18: 0000000000000191

x17: ffff80000c15d8bc
x16: ffff80000dd86118
x15: ffff0000c60dce00

x14: 0000000000000110
x13: 00000000ffffffff
x12: ffff0000c60dce00

x11: ff808000095945e8
x10: 0000000000000000
x9 : ffff8000095945e8

x8 : ffff0000c60dce00
x7 : ffff80000c1090e0
x6 : 0000000000000000

x5 : 0000000000000000
x4 : 0000000000000000
x3 : 0000000000000000

x2 : 0000000000000000
x1 : 0000000000000000
x0 : 0000000000000000

Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 598112
hardirqs last enabled at (598111): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (598111): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (598112): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (597426): [<ffff80000bfd4634>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last enabled at (597426): [<ffff80000bfd4634>] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471
softirqs last disabled at (597424): [<ffff80000bfd44c4>] spin_lock_bh include/linux/spinlock.h:355 [inline]
softirqs last disabled at (597424): [<ffff80000bfd44c4>] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:
CPU: 0 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work

pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0
x28: ffff0000c39dbe78
x27: ffff80000d49b000

x26: 0000000000000000
x25: 0000000000000000
x24: 0000000000000000

x23: 0000000000000000
x22: 0000000000000000
x21: 0000000000000000

x20: 0000000000000000
x19: ffff0000c82e1000
x18: 000000000000032e

x17: ffff80000c15d8bc
x16: ffff80000dd86118
x15: ffff0000c60dce00

x14: 0000000000000110
x13: 00000000ffffffff
x12: ffff0000c60dce00

x11: ff808000095945e8
x10: 0000000000000000
x9 : ffff8000095945e8

x8 : ffff0000c60dce00
x7 : ffff80000c1090e0
x6 : 0000000000000000

x5 : 0000000000000000
x4 : 0000000000000000
x3 : 0000000000000000

x2 : 0000000000000000
x1 : 0000000000000000
x0 : 0000000000000000
Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 600672
hardirqs last enabled at (600671): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (600671): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (600672): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (600626): [<ffff80000bfd4634>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last enabled at (600626): [<ffff80000bfd4634>] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471
softirqs last disabled at (600624): [<ffff80000bfd44c4>] spin_lock_bh include/linux/spinlock.h:355 [inline]
softirqs last disabled at (600624): [<ffff80000bfd44c4>] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:

CPU: 0 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work

pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0
x28: ffff0000cc27d878
x27: ffff80000d49b000

x26: 0000000000000000
x25: 0000000000000000
x24: 0000000000000000

x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000

x20: 0000000000000000
x19: ffff0000d1727000
x18: 0000000000000315

x17: ffff80000c15d8bc
x16: ffff80000dd86118
x15: ffff0000c60dce00

x14: 0000000000000110
x13: 00000000ffffffff
x12: ffff0000c60dce00

x11: ff808000095945e8
x10: 0000000000000000
x9 : ffff8000095945e8

x8 : ffff0000c60dce00
x7 : ffff80000c1090e0
x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 603390
hardirqs last enabled at (603389): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (603389): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (603390): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (603380): [<ffff80000bfd4634>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last enabled at (603380): [<ffff80000bfd4634>] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471
softirqs last disabled at (603378): [<ffff80000bfd44c4>] spin_lock_bh include/linux/spinlock.h:355 [inline]
softirqs last disabled at (603378): [<ffff80000bfd44c4>] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:
CPU: 1 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0 x28: ffff0000c63c7478 x27: ffff80000d49b000
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: ffff0000c9364000 x18: 0000000000000150
x17: ffff8001f1b6b000 x16: ffff80000dd86118 x15: ffff0000c60dce00
x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00
x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8
x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 613556
hardirqs last enabled at (613555): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (613555): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (613556): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (613530): [<ffff80000bd93034>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last enabled at (613530): [<ffff80000bd93034>] ieee80211_ibss_work+0x184/0x9f0 net/mac80211/ibss.c:1701
softirqs last disabled at (613528): [<ffff80000bd92f18>] spin_lock_bh include/linux/spinlock.h:355 [inline]
softirqs last disabled at (613528): [<ffff80000bd92f18>] ieee80211_ibss_work+0x68/0x9f0 net/mac80211/ibss.c:1690
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:
CPU: 1 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work

pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0
x28: ffff0000cc1fb378
x27: ffff80000d49b000

x26: 0000000000000000
x25: 0000000000000000
x24: 0000000000000000

x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: ffff0000c70e9000 x18: 000000000000028f
x17: 0000000000000075 x16: ffff80000dd86118 x15: ffff0000c60dce00
x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00
x11: ff808000095945e8
x10: 0000000000000000
x9 : ffff8000095945e8

x8 : ffff0000c60dce00
x7 : ffff80000c1090e0
x6 : 0000000000000000

x5 : 0000000000000000
x4 : 0000000000000000
x3 : 0000000000000000

x2 : 0000000000000000
x1 : 0000000000000000
x0 : 0000000000000000

Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 621634
hardirqs last enabled at (621633): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (621633): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (621634): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (621566): [<ffff80000bfd4634>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last enabled at (621566): [<ffff80000bfd4634>] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471
softirqs last disabled at (621564): [<ffff80000bfd44c4>] spin_lock_bh include/linux/spinlock.h:355 [inline]
softirqs last disabled at (621564): [<ffff80000bfd44c4>] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
Modules linked in:

CPU: 1 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound io_ring_exit_work

pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
sp : ffff8000164abad0
x29: ffff8000164abad0
x28: ffff0000c4c59b78
x27: ffff80000d49b000

x26: 0000000000000000
x25: 0000000000000000
x24: 0000000000000000

x23: 0000000000000000
x22: 0000000000000000
x21: 0000000000000000

x20: 0000000000000000
x19: ffff0000c70eb000
x18: 000000000000036d

x17: ffff80000c15d8bc
x16: ffff80000dd86118
x15: ffff0000c60dce00

x14: 0000000000000110
x13: 00000000ffffffff
x12: ffff0000c60dce00

x11: ff808000095945e8
x10: 0000000000000000
x9 : ffff8000095945e8

x8 : ffff0000c60dce00
x7 : ffff80000c1090e0
x6 : 0000000000000000

x5 : 0000000000000000
x4 : 0000000000000000
x3 : 0000000000000000

x2 : 0000000000000000
x1 : 0000000000000000
x0 : 0000000000000000

Call trace:
io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734
io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773
io_fill_cqe_req io_uring/io_uring.h:168 [inline]
io_do_iopoll+0x474/0x62c io_uring/rw.c:1065
io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513
io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056
io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
irq event stamp: 623186
hardirqs last enabled at (623185): [<ffff80000c1238f8>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (623185): [<ffff80000c1238f8>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (623186): [<ffff80000c110630>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (623164): [<ffff80000bd93034>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last enabled at (623164): [<ffff80000bd93034>] ieee80211_ibss_work+0x184/0x9f0 net/mac80211/ibss.c:1701
softirqs last disabled at (623162): [<ffff80000bd92f18>] spin_lock_bh include/linux/spinlock.h:355 [inline]
softirqs last disabled at (623162): [<ffff80000bd92f18>] ieee80211_ibss_work+0x68/0x9f0 net/mac80211/ibss.c:1690
---[ end trace 0000000000000000 ]---

Tested on:

commit: 0af4af97 io_uring/poll: add hash if ready poll request..
git tree: git://git.kernel.dk/linux.git syztest
console output: https://syzkaller.appspot.com/x/log.txt?x=1415a902480000
kernel config: https://syzkaller.appspot.com/x/.config?x=965a23481ff8fa50
dashboard link: https://syzkaller.appspot.com/bug?extid=6805087452d72929404e
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64

Note: no patches were applied.