general protection fault in raid5

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision
f7f4c3a1	assessment-security	DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	general protection fault in raid5_quiesce	2026/09/30 07:55	2026/09/30 07:55	2026/09/30 08:10	7808aef4

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	general protection fault in raid5_quiesce	2				1	9d11h	9d11h	0/3	upstream: reported on 2026/09/23 05:05

Kernel

Title

Rank 🛈

linux-5.15

general protection fault in raid5_quiesce

9d11h

0/3

upstream: reported on 2026/09/23 05:05

Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 0 UID: 0 PID: 11285 Comm: syz.4.1557 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 80 b0 29 09 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc90019cff708 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffffffff8b5ad0e3 RCX: 8000000000000001 RDX: 0000000000000000 RSI: ffffffff8b5ad0e3 RDI: 000000000000000c RBP: ffffc90019cff870 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffffff87fdad00 R12: 0000000000000060 R13: 0000000000000000 R14: 0000000000000060 R15: 0000000000000001 FS: 00007fcc1fc556c0(0000) GS:ffff888125bc4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e73d16300 CR3: 000000005e1e4000 CR4: 00000000003526f0 Call Trace: <TASK> __kasan_check_byte+0x12/0x40 mm/kasan/common.c:573 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x7d/0x350 kernel/locking/lockdep.c:5916 rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56 spin_lock_irq include/linux/spinlock_rt.h:96 [inline] lock_all_device_hash_locks_irq drivers/md/raid5.c:107 [inline] raid5_quiesce+0xc2/0x8a0 drivers/md/raid5.c:-1 __md_stop_writes+0xeb/0x4b0 drivers/md/md.c:7038 md_set_readonly+0x330/0x560 drivers/md/md.c:7138 array_state_store+0x584/0xe90 drivers/md/md.c:4720 md_attr_store+0x3b7/0x640 drivers/md/md.c:6158 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x61e/0xbb0 fs/read_write.c:687 ksys_write+0x156/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcc21a1e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcc1fc55028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fcc21ca6090 RCX: 00007fcc21a1e159 RDX: 0000000000000008 RSI: 0000200000000c00 RDI: 0000000000000007 RBP: 00007fcc21ab506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcc21ca6128 R14: 00007fcc21ca6090 R15: 00007ffd54d55a88 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 80 b0 29 09 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc90019cff708 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffffffff8b5ad0e3 RCX: 8000000000000001 RDX: 0000000000000000 RSI: ffffffff8b5ad0e3 RDI: 000000000000000c RBP: ffffc90019cff870 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffffff87fdad00 R12: 0000000000000060 R13: 0000000000000000 R14: 0000000000000060 R15: 0000000000000001 FS: 00007fcc1fc556c0(0000) GS:ffff888125bc4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fea63543480 CR3: 000000005e1e4000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 0f 1f 40 00 nopl 0x0(%rax) 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 0f 1f 40 d6 nopl -0x2a(%rax) 18: 48 c1 ef 03 shr $0x3,%rdi 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df * 26: 0f b6 04 07 movzbl (%rdi,%rax,1),%eax <-- trapping instruction 2a: 3c 08 cmp $0x8,%al 2c: 0f 92 c0 setb %al 2f: e9 80 b0 29 09 jmp 0x929b0b4 34: cc int3 35: 66 data16 36: 66 data16 37: 66 data16 38: 66 data16 39: 66 data16 3a: 66 data16 3b: 2e cs

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/09/28 10:52	upstream	72d3fcf802c4	a3c7249d	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-smack-root	general protection fault in raid5_quiesce

Crashes (1):

Assets (help?)