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WARNING in io_get_cqe_overflow

Status: fixed on 2023/06/08 14:41
Subsystems: io-uring
[Documentation on labels]
Reported-by: syzbot+200ab9a0f030458682a9@syzkaller.appspotmail.com
Fix commit: e12d7a46f65a io_uring/msg_ring: fix missing lock on overflow for IOPOLL
First crash: 736d, last: 736d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] WARNING in io_get_cqe_overflow 1 (2) 2023/01/23 14:16
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in io_get_cqe_overflow (2) io-uring C done 9 84d 84d 0/28 closed as invalid on 2024/12/28 20:58

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8481 at io_uring/io_uring.h:108 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
Modules linked in:
CPU: 1 PID: 8481 Comm: syz-executor.2 Not tainted 6.2.0-rc4-syzkaller-16807-gedb2f0dc90f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
lr : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
sp : ffff800013cfbb70
x29: ffff800013cfbb70 x28: ffff000119bb0778 x27: 0000000000000000
x26: ffff000119b53400 x25: 0000000000000001 x24: 0000000000000801
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: ffff00012219e000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000dd97118 x15: ffff000119b53400
x14: 0000000000000100 x13: 00000000ffffffff x12: 0000000000040000
x11: 000000000000129a x10: ffff800017e49000 x9 : ffff80000959f4d8
x8 : 000000000000129b x7 : ffff8000095986e8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80000cd89cfd
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
 io_get_cqe io_uring/io_uring.h:125 [inline]
 io_fill_cqe_aux io_uring/io_uring.c:832 [inline]
 __io_post_aux_cqe+0x58/0x190 io_uring/io_uring.c:880
 io_post_aux_cqe+0x40/0x58 io_uring/io_uring.c:890
 io_msg_ring_data+0x104/0x164 io_uring/msg_ring.c:74
 io_msg_ring+0x8c/0x2cc io_uring/msg_ring.c:227
 io_issue_sqe+0x1c4/0x518 io_uring/io_uring.c:1856
 io_queue_sqe io_uring/io_uring.c:2028 [inline]
 io_submit_sqe io_uring/io_uring.c:2286 [inline]
 io_submit_sqes+0x18c/0x454 io_uring/io_uring.c:2397
 __do_sys_io_uring_enter+0x168/0x9ac io_uring/io_uring.c:3345
 __se_sys_io_uring_enter io_uring/io_uring.c:3277 [inline]
 __arm64_sys_io_uring_enter+0x30/0x40 io_uring/io_uring.c:3277
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
irq event stamp: 662
hardirqs last  enabled at (661): [<ffff800008589058>] mod_objcg_state+0x19c/0x204 mm/memcontrol.c:3220
hardirqs last disabled at (662): [<ffff80000c118a7c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (612): [<ffff80000801c9f4>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (610): [<ffff80000801c9c0>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8481 at io_uring/io_uring.h:108 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
Modules linked in:
CPU: 0 PID: 8481 Comm: syz-executor.2 Tainted: G        W          6.2.0-rc4-syzkaller-16807-gedb2f0dc90f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
lr : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
sp : ffff800013cfbb70
x29: ffff800013cfbb70 x28: ffff000129dd9478 x27: 0000000000000000
x26: ffff000119b53400 x25: 0000000000000001 x24: 0000000000000801
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: ffff00012219e000 x18: 00000000000003fd
x17: ffff80000c16e8bc x16: ffff80000dd97118 x15: ffff000119b53400
x14: 0000000000000100 x13: 00000000ffffffff x12: 0000000000040000
x11: 000000000001dfc0 x10: ffff800017e49000 x9 : ffff80000959f4d8
x8 : 000000000001dfc1 x7 : ffff8000095986e8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
 io_get_cqe io_uring/io_uring.h:125 [inline]
 io_fill_cqe_aux io_uring/io_uring.c:832 [inline]
 __io_post_aux_cqe+0x58/0x190 io_uring/io_uring.c:880
 io_post_aux_cqe+0x40/0x58 io_uring/io_uring.c:890
 io_msg_ring_data+0x104/0x164 io_uring/msg_ring.c:74
 io_msg_ring+0x8c/0x2cc io_uring/msg_ring.c:227
 io_issue_sqe+0x1c4/0x518 io_uring/io_uring.c:1856
 io_queue_sqe io_uring/io_uring.c:2028 [inline]
 io_submit_sqe io_uring/io_uring.c:2286 [inline]
 io_submit_sqes+0x18c/0x454 io_uring/io_uring.c:2397
 __do_sys_io_uring_enter+0x168/0x9ac io_uring/io_uring.c:3345
 __se_sys_io_uring_enter io_uring/io_uring.c:3277 [inline]
 __arm64_sys_io_uring_enter+0x30/0x40 io_uring/io_uring.c:3277
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
irq event stamp: 892
hardirqs last  enabled at (891): [<ffff80000816eb44>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline]
hardirqs last  enabled at (891): [<ffff80000816eb44>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:5052
hardirqs last disabled at (892): [<ffff80000c118a7c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (888): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (665): [<ffff800008017c88>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8481 at io_uring/io_uring.h:108 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
Modules linked in:
CPU: 1 PID: 8481 Comm: syz-executor.2 Tainted: G        W          6.2.0-rc4-syzkaller-16807-gedb2f0dc90f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
lr : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
sp : ffff800013cfbb70
x29: ffff800013cfbb70 x28: ffff000129dd9f78 x27: 0000000000000000
x26: ffff000119b53400 x25: 0000000000000001 x24: 0000000000000801
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: ffff00012219e000 x18: 000000000000035a
x17: 0000000000000000 x16: ffff80000dd97118 x15: ffff000119b53400
x14: 0000000000000100 x13: 00000000ffffffff x12: 0000000000040000
x11: 00000000000399ac x10: ffff800017e49000 x9 : ffff80000959f4d8
x8 : 00000000000399ad x7 : ffff8000095986e8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
 io_get_cqe io_uring/io_uring.h:125 [inline]
 io_fill_cqe_aux io_uring/io_uring.c:832 [inline]
 __io_post_aux_cqe+0x58/0x190 io_uring/io_uring.c:880
 io_post_aux_cqe+0x40/0x58 io_uring/io_uring.c:890
 io_msg_ring_data+0x104/0x164 io_uring/msg_ring.c:74
 io_msg_ring+0x8c/0x2cc io_uring/msg_ring.c:227
 io_issue_sqe+0x1c4/0x518 io_uring/io_uring.c:1856
 io_queue_sqe io_uring/io_uring.c:2028 [inline]
 io_submit_sqe io_uring/io_uring.c:2286 [inline]
 io_submit_sqes+0x18c/0x454 io_uring/io_uring.c:2397
 __do_sys_io_uring_enter+0x168/0x9ac io_uring/io_uring.c:3345
 __se_sys_io_uring_enter io_uring/io_uring.c:3277 [inline]
 __arm64_sys_io_uring_enter+0x30/0x40 io_uring/io_uring.c:3277
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
irq event stamp: 974
hardirqs last  enabled at (973): [<ffff80000816eb44>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline]
hardirqs last  enabled at (973): [<ffff80000816eb44>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:5052
hardirqs last disabled at (974): [<ffff80000c118a7c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (970): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (895): [<ffff800008017c88>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8481 at io_uring/io_uring.h:108 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
Modules linked in:
CPU: 1 PID: 8481 Comm: syz-executor.2 Tainted: G        W          6.2.0-rc4-syzkaller-16807-gedb2f0dc90f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
lr : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
sp : ffff800013cfbb70
x29: ffff800013cfbb70 x28: ffff000129dd9d78 x27: 0000000000000000
x26: ffff000119b53400 x25: 0000000000000001 x24: 0000000000000801
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: ffff00012219e000 x18: 000000000000ba7e
x17: ffff80000c16e8bc x16: ffff80000dd97118 x15: ffff000119b53400
x14: 0000000000000100 x13: 00000000ffffffff x12: 0000000000040000
x11: 000000000003ffff x10: ffff800017e49000 x9 : ffff80000959f4d8
x8 : 0000000000040000 x7 : ffff8000095986e8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
 io_get_cqe io_uring/io_uring.h:125 [inline]
 io_fill_cqe_aux io_uring/io_uring.c:832 [inline]
 __io_post_aux_cqe+0x58/0x190 io_uring/io_uring.c:880
 io_post_aux_cqe+0x40/0x58 io_uring/io_uring.c:890
 io_msg_ring_data+0x104/0x164 io_uring/msg_ring.c:74
 io_msg_ring+0x8c/0x2cc io_uring/msg_ring.c:227
 io_issue_sqe+0x1c4/0x518 io_uring/io_uring.c:1856
 io_queue_sqe io_uring/io_uring.c:2028 [inline]
 io_submit_sqe io_uring/io_uring.c:2286 [inline]
 io_submit_sqes+0x18c/0x454 io_uring/io_uring.c:2397
 __do_sys_io_uring_enter+0x168/0x9ac io_uring/io_uring.c:3345
 __se_sys_io_uring_enter io_uring/io_uring.c:3277 [inline]
 __arm64_sys_io_uring_enter+0x30/0x40 io_uring/io_uring.c:3277
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
irq event stamp: 1012
hardirqs last  enabled at (1011): [<ffff80000816eb44>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline]
hardirqs last  enabled at (1011): [<ffff80000816eb44>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:5052
hardirqs last disabled at (1012): [<ffff80000c118a7c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1008): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (977): [<ffff800008017c88>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8481 at io_uring/io_uring.h:108 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
Modules linked in:
CPU: 1 PID: 8481 Comm: syz-executor.2 Tainted: G        W          6.2.0-rc4-syzkaller-16807-gedb2f0dc90f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
lr : io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
sp : ffff800013cfbb70
x29: ffff800013cfbb70 x28: ffff000129dd9e78 x27: 0000000000000000
x26: ffff000119b53400 x25: 0000000000000001 x24: 0000000000000801
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: ffff00012219e000 x18: 000000000000ba7e
x17: ffff80000c16e8bc x16: ffff80000dd97118 x15: ffff000119b53400
x14: 0000000000000100 x13: 00000000ffffffff x12: 0000000000040000
x11: 000000000003ffff x10: ffff800017e49000 x9 : ffff80000959f4d8
x8 : 0000000000040000 x7 : ffff8000095986e8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 io_get_cqe_overflow+0x1c4/0x1f0 io_uring/io_uring.h:108
 io_get_cqe io_uring/io_uring.h:125 [inline]
 io_fill_cqe_aux io_uring/io_uring.c:832 [inline]
 __io_post_aux_cqe+0x58/0x190 io_uring/io_uring.c:880
 io_post_aux_cqe+0x40/0x58 io_uring/io_uring.c:890
 io_msg_ring_data+0x104/0x164 io_uring/msg_ring.c:74
 io_msg_ring+0x8c/0x2cc io_uring/msg_ring.c:227
 io_issue_sqe+0x1c4/0x518 io_uring/io_uring.c:1856
 io_queue_sqe io_uring/io_uring.c:2028 [inline]
 io_submit_sqe io_uring/io_uring.c:2286 [inline]
 io_submit_sqes+0x18c/0x454 io_uring/io_uring.c:2397
 __do_sys_io_uring_enter+0x168/0x9ac io_uring/io_uring.c:3345
 __se_sys_io_uring_enter io_uring/io_uring.c:3277 [inline]
 __arm64_sys_io_uring_enter+0x30/0x40 io_uring/io_uring.c:3277
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
irq event stamp: 1220
hardirqs last  enabled at (1219): [<ffff80000816eb44>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline]
hardirqs last  enabled at (1219): [<ffff80000816eb44>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:5052
hardirqs last disabled at (1220): [<ffff80000c118a7c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1216): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (1015): [<ffff800008017c88>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/01/22 06:40 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci edb2f0dc90f2 559a440a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in io_get_cqe_overflow
* Struck through repros no longer work on HEAD.