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general protection fault in step_into

Status: upstream: reported C repro on 2023/05/14 14:12
Reported-by: syzbot+0eeb26335ddeb506c6d0@syzkaller.appspotmail.com
First crash: 738d, last: 5d16h
Cause bisection: introduced by (bisect log) :
commit 6be5b06e4195b002c52a1c2c82573ea7a76ce111
Author: Daniel Rosenberg <drosen@google.com>
Date: Thu Dec 2 22:38:56 2021 +0000

  ANDROID: fuse-bpf v1

Crash: general protection fault in step_into (log)
Repro: C syz .config
  
▶ ▼ Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 general protection fault in step_into origin:lts-only C done 205 20h09m 403d 0/3 upstream: reported C repro on 2024/04/13 08:21
upstream general protection fault in step_into fs 1 1725d 1721d 0/28 auto-closed as invalid on 2020/11/28 01:59
linux-6.1 KASAN: null-ptr-deref Read in step_into origin:lts-only C inconclusive 51 18d 410d 0/3 upstream: reported C repro on 2024/04/06 11:08
android-5-15 general protection fault in step_into origin:downstream C done 88 3d08h 738d 0/2 upstream: reported C repro on 2023/05/14 14:01
android-6-1 general protection fault in step_into origin:downstream C done 76 3d00h 738d 0/2 upstream: reported C repro on 2023/05/14 14:12
upstream BUG: unable to handle kernel paging request in step_into ntfs3 C error done 5 502d 868d 0/28 auto-obsoleted due to no activity on 2024/05/25 15:27
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2024/12/19 21:22 21m retest repro android13-5.10-lts report log
2024/12/19 21:22 12m retest repro android13-5.10-lts report log
2024/12/19 21:22 5m retest repro android13-5.10-lts report log
2024/12/19 21:22 6m retest repro android13-5.10-lts report log
2024/12/19 21:22 11m retest repro android13-5.10-lts report log
2024/11/02 21:14 6m retest repro android13-5.10-lts report log
2024/11/02 21:14 5m retest repro android13-5.10-lts report log
2024/11/02 21:14 7m retest repro android13-5.10-lts report log
2024/11/02 21:14 5m retest repro android13-5.10-lts report log
2024/11/02 21:14 10m retest repro android13-5.10-lts report log

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 275 Comm: syz-executor366 Not tainted 5.10.236-syzkaller-00012-gab07aeb2c93d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:traverse_mounts fs/namei.c:1357 [inline]
RIP: 0010:handle_mounts fs/namei.c:1477 [inline]
RIP: 0010:step_into+0x122/0xcf0 fs/namei.c:1782
Code: c6 44 24 5f 00 43 0f b6 44 25 00 84 c0 48 8b 54 24 08 0f 85 51 0a 00 00 44 8b 32 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 56 0a 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90000b27940 EFLAGS: 00010247
RAX: 0000000000000000 RBX: ffffc90000b27b60 RCX: ffff88810c998000
RDX: ffffc90000b27b98 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000b27a28 R08: 0000000000000000 R09: ffffed10234fa525
R10: ffffed10234fa525 R11: 1ffff110234fa524 R12: dffffc0000000000
R13: 1ffff92000164f73 R14: 0000000000000008 R15: 0000000000000005
FS:  00007f15670e16c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561b7f704c98 CR3: 000000011be8d000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 walk_component+0x26a/0x460 fs/namei.c:1958
 lookup_last fs/namei.c:2403 [inline]
 path_lookupat+0x180/0x490 fs/namei.c:2427
 filename_lookup+0x1d5/0x600 fs/namei.c:2460
 user_path_at_empty+0x43/0x50 fs/namei.c:2740
 user_path_at include/linux/namei.h:60 [inline]
 path_removexattr+0xb3/0x350 fs/xattr.c:797
 __do_sys_lremovexattr fs/xattr.c:822 [inline]
 __se_sys_lremovexattr fs/xattr.c:819 [inline]
 __x64_sys_lremovexattr+0x5d/0x70 fs/xattr.c:819
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f1567140639
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f15670e1218 EFLAGS: 00000246 ORIG_RAX: 00000000000000c6
RAX: ffffffffffffffda RBX: 00007f15671cd3f8 RCX: 00007f1567140639
RDX: 00007f1567140639 RSI: 0000000000000000 RDI: 0000200000000580
RBP: 00007f15671cd3f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f156719a02c
R13: 000020000000c280 R14: 0000200000000580 R15: 00007ffce28eee78
Modules linked in:
---[ end trace f629eaf84bb612db ]---
RIP: 0010:traverse_mounts fs/namei.c:1357 [inline]
RIP: 0010:handle_mounts fs/namei.c:1477 [inline]
RIP: 0010:step_into+0x122/0xcf0 fs/namei.c:1782
Code: c6 44 24 5f 00 43 0f b6 44 25 00 84 c0 48 8b 54 24 08 0f 85 51 0a 00 00 44 8b 32 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 56 0a 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90000b27940 EFLAGS: 00010247
RAX: 0000000000000000 RBX: ffffc90000b27b60 RCX: ffff88810c998000
RDX: ffffc90000b27b98 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000b27a28 R08: 0000000000000000 R09: ffffed10234fa525
R10: ffffed10234fa525 R11: 1ffff110234fa524 R12: dffffc0000000000
R13: 1ffff92000164f73 R14: 0000000000000008 R15: 0000000000000005
FS:  00007f15670e16c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f156711f980 CR3: 000000011be8d000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c6 44 24 5f 00       	movb   $0x0,0x5f(%rsp)
   5:	43 0f b6 44 25 00    	movzbl 0x0(%r13,%r12,1),%eax
   b:	84 c0                	test   %al,%al
   d:	48 8b 54 24 08       	mov    0x8(%rsp),%rdx
  12:	0f 85 51 0a 00 00    	jne    0xa69
  18:	44 8b 32             	mov    (%rdx),%r14d
  1b:	4c 8b bc 24 88 00 00 	mov    0x88(%rsp),%r15
  22:	00
  23:	4c 89 f8             	mov    %r15,%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 56 0a 00 00    	jne    0xa8d
  37:	45 8b 3f             	mov    (%r15),%r15d
  3a:	44 89 fe             	mov    %r15d,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0

Crashes (226):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/30 04:48 android13-5.10-lts ab07aeb2c93d 85a5a23f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/02/26 22:56 android13-5.10-lts 3f5f2283d684 6a8fcbc4 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/24 13:25 android13-5.10-lts fbe98d68b6b3 521b0ce3 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/10/13 05:39 android13-5.10-lts e5e5644ea27f 084d8178 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/06/28 20:25 android13-5.10-lts a4a2b7a82ee4 757f06b1 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/06/03 19:03 android13-5.10-lts d3c4d815bf09 0aba2352 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/02/22 21:32 android13-5.10-lts dd976ecce2ce 8d446f15 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/01/08 07:08 android13-5.10-lts f7977422e132 d0304e9c .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/01/03 16:31 android13-5.10-lts f7977422e132 fb427a07 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-5-10 general protection fault in step_into
2023/09/25 03:22 android13-5.10-lts a27512601c2d 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2023/09/23 08:27 android13-5.10-lts a27512601c2d 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2023/08/26 11:26 android13-5.10-lts c6a1fbd8e4aa 7ba13a15 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2023/05/14 14:41 android13-5.10-lts 43c801dc3325 2b9ba477 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2023/05/14 14:19 android13-5.10-lts 43c801dc3325 2b9ba477 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2023/05/14 14:02 android13-5.10-lts 43c801dc3325 2b9ba477 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/05/16 08:36 android13-5.10-lts 7e2543346ff7 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/05/11 01:14 android13-5.10-lts 7e2543346ff7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/05/04 21:47 android13-5.10-lts ab07aeb2c93d b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/05/03 14:20 android13-5.10-lts ab07aeb2c93d b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/04/27 06:59 android13-5.10-lts ba8b8b193394 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/04/19 00:33 android13-5.10-lts ba8b8b193394 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/04/15 14:39 android13-5.10-lts ba8b8b193394 23b969b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/04/14 13:02 android13-5.10-lts e0b88ee5f09c 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/04/11 02:28 android13-5.10-lts e0b88ee5f09c 1ef3ab4d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/04/10 15:21 android13-5.10-lts e0b88ee5f09c 988b336c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/04/07 05:25 android13-5.10-lts 094fc3778d6b 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/03/25 12:51 android13-5.10-lts 094fc3778d6b 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/03/25 01:00 android13-5.10-lts 094fc3778d6b 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/03/16 10:24 android13-5.10-lts fc9aa81462ee e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/03/06 19:48 android13-5.10-lts 3f5f2283d684 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/03/04 07:42 android13-5.10-lts 3f5f2283d684 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/02/27 08:06 android13-5.10-lts 3f5f2283d684 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/02/25 16:38 android13-5.10-lts 3f5f2283d684 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/02/23 22:21 android13-5.10-lts 3f5f2283d684 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/02/20 01:01 android13-5.10-lts 6686f2996d23 b257a9b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/02/19 13:08 android13-5.10-lts 6686f2996d23 9a14138f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/02/16 04:26 android13-5.10-lts 6686f2996d23 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/02/13 21:25 android13-5.10-lts 6686f2996d23 a98a8417 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/31 16:09 android13-5.10-lts fbe98d68b6b3 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/24 12:38 android13-5.10-lts fbe98d68b6b3 521b0ce3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/19 22:30 android13-5.10-lts fbe98d68b6b3 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/11 16:08 android13-5.10-lts 49e8ba0a684f 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/09 04:06 android13-5.10-lts 49e8ba0a684f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/08 14:02 android13-5.10-lts 49e8ba0a684f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/03 04:48 android13-5.10-lts 49e8ba0a684f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2025/01/02 04:31 android13-5.10-lts 49e8ba0a684f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/12/28 10:30 android13-5.10-lts 4055d754db6f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/12/05 19:25 android13-5.10-lts 220ce693f83f 29f61fce .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/11/30 19:27 android13-5.10-lts 139a6bb26d9d 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/11/28 15:29 android13-5.10-lts 139a6bb26d9d 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/11/24 12:57 android13-5.10-lts b14940b90491 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/11/23 08:24 android13-5.10-lts b14940b90491 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/11/17 11:16 android13-5.10-lts 6a01908517df cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/11/07 09:11 android13-5.10-lts e5e5644ea27f df3dc63b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/11/07 01:11 android13-5.10-lts e5e5644ea27f df3dc63b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/10/19 15:47 android13-5.10-lts e5e5644ea27f cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/10/14 19:11 android13-5.10-lts e5e5644ea27f 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/10/13 05:13 android13-5.10-lts e5e5644ea27f 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2024/09/22 21:02 android13-5.10-lts 8d23314f588a 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
2023/05/14 13:45 android13-5.10-lts 43c801dc3325 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in step_into
* Struck through repros no longer work on HEAD.