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: 389d, last: 3d13h

Sample crash report:
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4279 Comm: syz.0.226 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
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 : ffff80001faf7cf0
x29: ffff80001faf7cf0 x28: ffff0000d91b51c0 x27: 0000000000000000
x26: 1fffe0001b236a38 x25: 0000000000400040 x24: ffff0000d57ef300
x23: dfff800000000000 x22: 00000000fffffff2 x21: 0000000000000000
x20: ffff0000d91b51c0 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008a323f0 x15: 0000000000000000
x14: 0000000000000003 x13: 1ffff0000288202b x12: 0000000097863b1e
x11: ff80800008a323cc x10: 0000000000000000 x9 : 0000ffffffffffff
x8 : 0000000000000000 x7 : ffff800008764494 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 9c4ab059bcb1e51b ]---
----------------
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 (252):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/18 07:52 linux-5.15.y 0248c33e835e 853b104b .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
2026/09/17 17:14 linux-5.15.y 0248c33e835e 8d7d05f1 .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
2026/09/15 14:50 linux-5.15.y 0248c33e835e 2daa4bb5 .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
2026/09/14 14:40 linux-5.15.y 0248c33e835e 81a27d1a .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
2026/09/12 01:44 linux-5.15.y 0996e0926f6b 70a60e12 .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
2026/09/09 18:18 linux-5.15.y 0996e0926f6b 4e8b1cc6 .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
2026/09/09 04:44 linux-5.15.y 0996e0926f6b 8387c273 .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
2026/09/08 15:52 linux-5.15.y 0996e0926f6b 243b72f1 .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
2026/09/04 10:11 linux-5.15.y 0996e0926f6b f65209a4 .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
2026/09/03 21:30 linux-5.15.y 0996e0926f6b 801f0966 .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
2026/09/03 04:40 linux-5.15.y 0996e0926f6b 6a988719 .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
2026/09/02 15:40 linux-5.15.y 0996e0926f6b 85995287 .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
2026/09/02 13:19 linux-5.15.y 28c35638ec51 85995287 .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
2026/09/01 11:06 linux-5.15.y 28c35638ec51 587f6b29 .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
2026/08/31 16:47 linux-5.15.y 28c35638ec51 316d9396 .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
2026/08/28 21:43 linux-5.15.y 28c35638ec51 2f52988a .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
2026/08/28 07:53 linux-5.15.y 28c35638ec51 69a01293 .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
2026/08/27 12:57 linux-5.15.y 4a1eaf96ee5c 69a01293 .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
2026/08/27 11:17 linux-5.15.y 945fa863f02c 69a01293 .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
2026/08/26 14:29 linux-5.15.y 945fa863f02c a2b77b9e .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
2026/08/26 02:34 linux-5.15.y 945fa863f02c 6a91adb4 .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
2026/08/25 12:22 linux-5.15.y 945fa863f02c a9a1fc32 .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
2026/08/25 00:02 linux-5.15.y 945fa863f02c 614e416a .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
2026/08/24 11:47 linux-5.15.y 945fa863f02c b55bd4c3 .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
2026/08/19 16:19 linux-5.15.y 0eb903b5b519 1e72964b .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
2026/08/18 00:20 linux-5.15.y aabd761612db 1e72964b .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
2026/08/17 11:37 linux-5.15.y aabd761612db 905244d6 .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
2026/08/15 00:16 linux-5.15.y aabd761612db 746171ee .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
2026/08/14 12:38 linux-5.15.y aabd761612db 6f9b3e89 .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
2026/08/13 18:37 linux-5.15.y aabd761612db b13552fe .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
2026/08/12 19:06 linux-5.15.y aabd761612db 359b2492 .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
2026/08/11 13:57 linux-5.15.y aabd761612db 71790083 .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
2026/08/08 04:51 linux-5.15.y aabd761612db 5d63f80b .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
2026/08/07 10:30 linux-5.15.y aabd761612db e4ef95d6 .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
2026/08/07 06:40 linux-5.15.y aabd761612db c38879ea .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
2026/08/06 19:00 linux-5.15.y 9c7634c60784 c38879ea .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
2026/08/06 15:19 linux-5.15.y 6e2fd6534337 c38879ea .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
2026/08/04 13:36 linux-5.15.y 6e2fd6534337 d4abbeac .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
2026/08/03 23:36 linux-5.15.y 6e2fd6534337 9451e17e .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
2026/08/01 03:17 linux-5.15.y 6e2fd6534337 e611ffe1 .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
2026/07/31 13:40 linux-5.15.y 6e2fd6534337 7664cf44 .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
2026/07/30 18:33 linux-5.15.y 6e2fd6534337 aaffb173 .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
2026/07/30 08:00 linux-5.15.y 674f684f7c61 2377cd3d .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.