syzbot

 sign-in | mailing list | source | docs
🐞 Open [121]
🐞 Fixed [23]
🐞 Invalid [357]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

general protection fault in update_sit_entry

Status: upstream: reported C repro on 2024/11/24 02:28
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+74f4db0e3f48b4592d48@syzkaller.appspotmail.com
First crash: 455d, last: 13h56m
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/11/24 android13-5.15-lts (ToT) 101e665d55a8 C [report] general protection fault in update_sit_entry
2024/11/24 lts (merge base) 584a40a22cb9 C Didn't crash
2024/11/24 upstream (ToT) 9f16d5e6f220 C Didn't crash
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 general protection fault in update_sit_entry origin:lts-only 8 C error 18 33d 498d 0/3 upstream: reported C repro on 2024/10/11 17:04
linux-4.14 general protection fault in update_sit_entry f2fs 2 C 9 1085d 1198d 0/1 upstream: reported C repro on 2022/11/12 02:17
android-5-10 general protection fault in update_sit_entry 2 C 28 1d02h 449d 0/2 upstream: reported C repro on 2024/11/29 11:40
linux-6.1 general protection fault in update_sit_entry origin:lts-only 8 C done 17 29d 411d 0/3 upstream: reported C repro on 2025/01/07 01:40
android-6-1 general protection fault in update_sit_entry origin:downstream 2 C 28 13d 440d 0/2 upstream: reported C repro on 2024/12/08 18:16
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/12/30 20:33 16m retest repro android13-5.15-lts report log
2025/12/30 20:33 10m retest repro android13-5.15-lts report log
2025/12/30 20:33 15m retest repro android13-5.15-lts report log
2025/12/30 20:33 9m retest repro android13-5.15-lts report log
2025/12/30 20:33 8m retest repro android13-5.15-lts report log
2025/11/06 00:52 20m retest repro android13-5.15-lts report log
2025/11/06 00:52 18m retest repro android13-5.15-lts report log
2025/11/06 00:52 15m retest repro android13-5.15-lts report log
2025/10/22 22:54 37m retest repro android13-5.15-lts report log
2025/10/22 22:54 15m retest repro android13-5.15-lts report log
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/03/28 05:10 1h40m bisect fix android13-5.15-lts OK (0) job log log

Sample crash report:
F2FS-fs (loop4): Start checkpoint disabled!
F2FS-fs (loop4): Mounted with checkpoint version = 48b305e6
general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 426 Comm: syz.4.21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2946 [inline]
RIP: 0010:update_sit_entry+0x5b4/0xf70 fs/f2fs/segment.c:2256
Code: 00 00 49 8d 5d 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 5a 70 90 ff 48 8b 1b 48 03 5d b0 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 a9 08 00 00 44 0f b6 33 44 89 f0 44 8b
RSP: 0018:ffffc90001b57260 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000037 RCX: ffff8881129793c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001b572e0 R08: ffff8881129793c0 R09: 0000000000000003
R10: 00000000ffffffff R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88811379d990 R14: 0000000000000000 R15: ffff888113d86000
FS:  00007f9dd2b1a6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9dd2af8ff8 CR3: 000000011eba4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_allocate_data_block+0x15e8/0x3240 fs/f2fs/segment.c:3457
 __allocate_data_block+0x54d/0xa40 fs/f2fs/data.c:1405
 f2fs_map_blocks+0xf01/0x38f0 fs/f2fs/data.c:1577
 expand_inode_data+0x4b6/0x890 fs/f2fs/file.c:1776
 f2fs_fallocate+0x41c/0x880 fs/f2fs/file.c:1879
 vfs_fallocate+0x4b4/0x590 fs/open.c:309
 ioctl_preallocate fs/ioctl.c:294 [inline]
 file_ioctl fs/ioctl.c:334 [inline]
 do_vfs_ioctl+0x19f8/0x1d80 fs/ioctl.c:853
 __do_sys_ioctl fs/ioctl.c:872 [inline]
 __se_sys_ioctl+0x9f/0x1a0 fs/ioctl.c:860
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860
 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9dd2cb7629
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:00007f9dd2b1a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9dd2f30fa0 RCX: 00007f9dd2cb7629
RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000004
RBP: 00007f9dd2d4db39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dd2f31038 R14: 00007f9dd2f30fa0 R15: 00007ffeb1ffab78
 </TASK>
Modules linked in:
---[ end trace e1db86aeec8df789 ]---
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2946 [inline]
RIP: 0010:update_sit_entry+0x5b4/0xf70 fs/f2fs/segment.c:2256
Code: 00 00 49 8d 5d 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 5a 70 90 ff 48 8b 1b 48 03 5d b0 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 a9 08 00 00 44 0f b6 33 44 89 f0 44 8b
RSP: 0018:ffffc90001b57260 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000037 RCX: ffff8881129793c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001b572e0 R08: ffff8881129793c0 R09: 0000000000000003
R10: 00000000ffffffff R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88811379d990 R14: 0000000000000000 R15: ffff888113d86000
FS:  00007f9dd2b1a6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb32431d000 CR3: 000000011eba4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	49 8d 5d 18          	lea    0x18(%r13),%rbx
   6:	48 89 d8             	mov    %rbx,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  12:	74 08                	je     0x1c
  14:	48 89 df             	mov    %rbx,%rdi
  17:	e8 5a 70 90 ff       	call   0xff907076
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	48 03 5d b0          	add    -0x50(%rbp),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 a9 08 00 00    	jne    0x8e0
  37:	44 0f b6 33          	movzbl (%rbx),%r14d
  3b:	44 89 f0             	mov    %r14d,%eax
  3e:	44                   	rex.R
  3f:	8b                   	.byte 0x8b

Crashes (52):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/20 01:17 android13-5.15-lts 13d6d33696ef c8d8c52d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/11/24 08:52 android13-5.15-lts 057fdbf6d3c7 4fb8ef37 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/06/20 22:24 android13-5.15-lts e678c93d43cc 804b3919 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/06/19 05:46 android13-5.15-lts e678c93d43cc ed3e87f7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/06/18 11:17 android13-5.15-lts e678c93d43cc e77fae15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/06/18 08:25 android13-5.15-lts e678c93d43cc e77fae15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/06/03 07:29 android13-5.15-lts 4032a894ccb2 a30356b7 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/05/31 17:27 android13-5.15-lts 4032a894ccb2 3d2f584d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2024/11/24 08:49 android13-5.15-lts 101e665d55a8 68da6d95 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-5-15 general protection fault in update_sit_entry
2024/11/24 06:33 android13-5.15-lts 101e665d55a8 68da6d95 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-5-15 general protection fault in update_sit_entry
2024/11/24 04:39 android13-5.15-lts 101e665d55a8 68da6d95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-5-15 general protection fault in update_sit_entry
2024/11/24 02:21 android13-5.15-lts 101e665d55a8 68da6d95 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-5-15 general protection fault in update_sit_entry
2025/12/11 10:26 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/06/22 04:59 android13-5.15-lts e678c93d43cc d6cdfb8a .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2025/06/18 06:19 android13-5.15-lts e678c93d43cc e77fae15 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 general protection fault in update_sit_entry
2024/11/24 11:06 android13-5.15-lts 101e665d55a8 68da6d95 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-5-15 general protection fault in update_sit_entry
2026/02/21 16:27 android13-5.15-lts 13d6d33696ef 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2026/02/15 12:04 android13-5.15-lts 13d6d33696ef 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2026/02/08 17:52 android13-5.15-lts b5b90d209864 4c131dc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2026/01/29 17:58 android13-5.15-lts 7e1070528954 aeb6fdd5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2026/01/15 16:44 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2026/01/08 02:00 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2026/01/03 21:39 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2026/01/01 01:46 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/12/16 04:30 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/12/12 04:22 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/12/02 19:33 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/21 13:00 android13-5.15-lts 8d934e0056f7 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:33 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:32 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:32 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:32 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:32 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:31 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:30 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:30 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/09/07 17:30 android13-5.15-lts 0f3772eee002 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:37 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:35 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:35 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:31 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:31 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:30 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:27 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:25 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:25 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:20 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/08/06 20:19 android13-5.15-lts f32b52534f1d ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/05/31 16:46 android13-5.15-lts 4032a894ccb2 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2025/01/12 19:06 android13-5.15-lts 19092c8155b4 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2024/12/01 14:53 android13-5.15-lts 548ca9fbf844 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
2024/11/24 00:35 android13-5.15-lts 101e665d55a8 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in update_sit_entry
* Struck through repros no longer work on HEAD.