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linux-5.15.y test error: Internal error in lookup_ioctx

Status: upstream: reported on 2025/08/28 15:36
Reported-by: syzbot+7bc2b1c6268d7ff840ed@syzkaller.appspotmail.com
First crash: 327d, last: 1d03h

Sample crash report:
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4210 Comm: syz.2.157 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : lookup_ioctx+0x10c/0x7c0 fs/aio.c:1070
lr : lookup_ioctx+0xe8/0x7c0 fs/aio.c:1070
sp : ffff80001fa27cf0
x29: ffff80001fa27cf0 x28: ffff0000cc7351c0 x27: 0000000000000000
x26: 1fffe000198e6a38 x25: 0000000000400040 x24: ffff0000dbb1b980
x23: dfff800000000000 x22: 00000000fffffff2 x21: 0000000000000000
x20: ffff0000cc7351c0 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008a2fed0 x15: 0000000000000000
x14: 0000000000000003 x13: 1ffff0000287e02b x12: 0000000082d2c423
x11: ff80800008a2feac x10: 0000000000000000 x9 : 0000ffffffffffff
x8 : 0000000000000000 x7 : ffff8000087623bc x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 lookup_ioctx+0x10c/0x7c0 fs/aio.c:1070
 __do_sys_io_cancel fs/aio.c:2150 [inline]
 __se_sys_io_cancel fs/aio.c:2136 [inline]
 __arm64_sys_io_cancel+0x160/0x33c fs/aio.c:2136
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: d503229f 2a1f03f6 2a1f03e0 b8400953 (2a1603e1) 
---[ end trace 6627e56209c29ed8 ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1f03f6 	mov	w22, wzr
   8:	2a1f03e0 	mov	w0, wzr
   c:	b8400953 	ldtr	w19, [x10]
* 10:	2a1603e1 	mov	w1, w22 <-- trapping instruction

Crashes (200):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/21 10:40 linux-5.15.y c86c4726e7f0 7c5de9c3 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/18 04:26 linux-5.15.y c86c4726e7f0 72524a66 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/17 16:22 linux-5.15.y c86c4726e7f0 8aaff637 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/17 03:50 linux-5.15.y c86c4726e7f0 7f27c57a .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/16 12:32 linux-5.15.y c86c4726e7f0 71b49442 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/15 08:29 linux-5.15.y c86c4726e7f0 a4ed0f4f .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/14 00:35 linux-5.15.y c86c4726e7f0 2130f682 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/13 11:54 linux-5.15.y c86c4726e7f0 cc4833d0 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/11 02:50 linux-5.15.y c86c4726e7f0 d78ea535 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/10 14:20 linux-5.15.y c86c4726e7f0 99e64375 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/07 13:00 linux-5.15.y c86c4726e7f0 76cdc0c0 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/07 00:42 linux-5.15.y c86c4726e7f0 8e71ce95 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/06 12:14 linux-5.15.y c86c4726e7f0 88b240e4 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/04 13:17 linux-5.15.y c86c4726e7f0 fcece630 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/03 04:11 linux-5.15.y eceeec79dbc6 58bf2096 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/02 17:00 linux-5.15.y eceeec79dbc6 2b70b115 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/07/01 02:37 linux-5.15.y eceeec79dbc6 00a5cf1c .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/30 14:14 linux-5.15.y eceeec79dbc6 00e8b0fd .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/29 11:21 linux-5.15.y eceeec79dbc6 6a0c72dc .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/24 00:12 linux-5.15.y eceeec79dbc6 042555ff .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/23 11:57 linux-5.15.y eceeec79dbc6 4b1d8f01 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/22 18:01 linux-5.15.y eceeec79dbc6 5a630be6 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/19 20:25 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/19 12:14 linux-5.15.y eceeec79dbc6 570c59ee .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/19 07:52 linux-5.15.y dc027a595035 570c59ee .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/18 10:05 linux-5.15.y dc027a595035 a776b0d0 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/17 15:52 linux-5.15.y dc027a595035 b62b3ded .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/16 23:38 linux-5.15.y dc027a595035 62cc6db3 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/16 11:22 linux-5.15.y dc027a595035 a3998659 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/15 13:31 linux-5.15.y dc027a595035 50bb0618 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/13 08:10 linux-5.15.y dc027a595035 1d2f3589 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/12 16:50 linux-5.15.y dc027a595035 1d2f3589 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/11 14:13 linux-5.15.y dc027a595035 d93a6ab6 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/10 12:21 linux-5.15.y dc027a595035 f79bac11 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/09 23:59 linux-5.15.y dc027a595035 34dab4be .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/09 11:45 linux-5.15.y dc027a595035 c36c07f6 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/05 11:29 linux-5.15.y dc027a595035 48b6c3fa .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/04 01:23 linux-5.15.y dc027a595035 197909be .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/03 12:31 linux-5.15.y dc027a595035 234057e5 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/03 00:13 linux-5.15.y dc027a595035 3c0d2131 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/02 11:47 linux-5.15.y dc027a595035 62fe1528 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/01 21:14 linux-5.15.y dc027a595035 1095583b .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/01 17:01 linux-5.15.y dc027a595035 8d8eeb3a .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/06/01 08:56 linux-5.15.y 241d66fa280c 8d8eeb3a .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/05/29 12:09 linux-5.15.y 241d66fa280c 6b4a8443 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/05/29 00:18 linux-5.15.y 241d66fa280c 4624854e .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/05/28 12:00 linux-5.15.y 241d66fa280c 681715f7 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/05/27 23:42 linux-5.15.y 241d66fa280c 4c36e7e5 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/05/27 12:27 linux-5.15.y 241d66fa280c 8777bdc3 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/05/26 22:08 linux-5.15.y 241d66fa280c 2b01f00e .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2026/05/26 08:39 linux-5.15.y 241d66fa280c a3e47276 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
2025/08/28 15:36 linux-5.15.y 01879f56bdde e12e5ba4 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in lookup_ioctx
* Struck through repros no longer work on HEAD.