syzbot


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

Status: upstream: reported on 2025/08/28 20:08
Reported-by: syzbot+0f7e9581a8ceed4f72fa@syzkaller.appspotmail.com
First crash: 151d, last: 3d11h

Sample crash report:
cgroup: Unknown subsys name 'net'
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4032 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : copy_mount_options fs/namespace.c:3255 [inline]
pc : __do_sys_mount fs/namespace.c:3580 [inline]
pc : __se_sys_mount fs/namespace.c:3562 [inline]
pc : __arm64_sys_mount+0x2f0/0x5f0 fs/namespace.c:3562
lr : copy_mount_options fs/namespace.c:3255 [inline]
lr : __do_sys_mount fs/namespace.c:3580 [inline]
lr : __se_sys_mount fs/namespace.c:3562 [inline]
lr : __arm64_sys_mount+0x2cc/0x5f0 fs/namespace.c:3562
sp : ffff80001be77c80
x29: ffff80001be77d20 x28: 0000000000400100 x27: 00000000fffffff2
x26: 0000000000000eaf x25: 0000000000000000 x24: 0000fffffebbe151
x23: ffff0000c1348000 x22: 0000fffffebbf000 x21: dfff800000000000
x20: 00000000fffffeaf x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000896c9ac x15: 0000000000000000
x14: 0000000000000000 x13: 1ffff0000285202b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000fffffebbf000
x8 : 0000fffffebbf000 x7 : ffff800008758124 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 copy_mount_options fs/namespace.c:3255 [inline]
 __do_sys_mount fs/namespace.c:3580 [inline]
 __se_sys_mount fs/namespace.c:3562 [inline]
 __arm64_sys_mount+0x2f0/0x5f0 fs/namespace.c:3562
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x13c 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 2a1903fb 2a1903e0 38400933 (2a1b03e1) 
---[ end trace 342728db520f85a8 ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1903fb 	mov	w27, w25
   8:	2a1903e0 	mov	w0, w25
   c:	38400933 	ldtrb	w19, [x9]
* 10:	2a1b03e1 	mov	w1, w27 <-- trapping instruction

Crashes (13):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/23 10:30 linux-5.15.y 9eec9a14ee10 e2b1b6e6 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/11/26 14:21 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/11/25 01:58 linux-5.15.y cc5ec8769306 64219f15 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/11/19 18:21 linux-5.15.y cc5ec8769306 26ee5237 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/10/22 03:31 linux-5.15.y ac56c046adf4 252fbbad .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/10/17 22:14 linux-5.15.y 29e53a5b1c4f 1c8c8cd8 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/10/17 09:59 linux-5.15.y 29e53a5b1c4f 7adf5298 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/10/07 00:03 linux-5.15.y 29e53a5b1c4f 8ef35d49 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/10/06 11:07 linux-5.15.y 29e53a5b1c4f 91305dbe .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/09/19 10:48 linux-5.15.y 43bb85222e53 67c37560 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/09/04 02:21 linux-5.15.y 01879f56bdde d291dd2d .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/09/02 13:52 linux-5.15.y 01879f56bdde 96a211bc .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
2025/08/28 20:08 linux-5.15.y 01879f56bdde d401b9d7 .config console log report [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 linux-5.15.y test error: Internal error in sys_mount
* Struck through repros no longer work on HEAD.