syzbot


general protection fault in security_inode_getattr

Status: upstream: reported C repro on 2024/03/26 18:25
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+c58fbb225bcffe111d4a@syzkaller.appspotmail.com
First crash: 524d, last: 11d
Bug presence (3)
Date Name Commit Repro Result
2024/03/27 android14-6.1 (ToT) eef3b6e52937 C [report] general protection fault in security_inode_getattr
2024/03/27 lts (merge base) 883d1a956208 C Didn't crash
2024/04/10 upstream (ToT) 2c71fdf02a95 C Didn't crash
Similar bugs (11)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in security_inode_getattr overlayfs 2 C done inconclusive 55 842d 1860d 0/29 auto-obsoleted due to no activity on 2023/08/23 09:02
linux-5.15 general protection fault in security_inode_getattr 2 1 654d 654d 0/3 auto-obsoleted due to no activity on 2024/02/25 11:36
android-54 general protection fault in security_inode_getattr 2 C 3 155d 1819d 0/2 upstream: reported C repro on 2020/09/08 02:23
linux-6.1 BUG: unable to handle kernel paging request in security_inode_getattr 8 6 209d 341d 0/3 auto-obsoleted due to no activity on 2025/05/15 11:02
linux-5.15 general protection fault in security_inode_getattr (3) 8 9 167d 367d 0/3 auto-obsoleted due to no activity on 2025/06/26 02:46
linux-6.1 general protection fault in security_inode_getattr (2) 2 1 103d 103d 0/3 auto-obsoleted due to no activity on 2025/08/29 15:51
android-5-15 general protection fault in security_inode_getattr origin:downstream 2 C error 8 8d04h 523d 0/2 upstream: reported C repro on 2024/03/27 12:21
linux-5.15 general protection fault in security_inode_getattr (2) 2 4 492d 532d 0/3 auto-obsoleted due to no activity on 2024/08/05 16:40
linux-4.19 general protection fault in security_inode_getattr 2 C error 29 1061d 1842d 0/1 upstream: reported C repro on 2020/08/16 14:26
linux-6.1 general protection fault in security_inode_getattr 2 4 449d 497d 0/3 auto-obsoleted due to no activity on 2024/09/17 16:33
android-5-10 general protection fault in security_inode_getattr 2 C 22 14d 524d 0/2 upstream: reported C repro on 2024/03/26 17:56
Last patch testing requests (4)
Created Duration User Patch Repo Result
2025/08/07 13:35 6m retest repro android14-6.1 report log
2025/08/07 13:35 13m retest repro android14-6.1 report log
2025/05/21 20:23 6m retest repro android14-6.1 report log
2025/04/05 12:51 6m retest repro android14-6.1 report log
Fix bisection attempts (9)
Created Duration User Patch Repo Result
2025/06/21 19:45 2h35m bisect fix android14-6.1 OK (0) job log log
2025/05/06 23:41 1h27m bisect fix android14-6.1 OK (0) job log log
2025/03/01 19:25 1h46m bisect fix android14-6.1 OK (0) job log log
2025/01/28 20:51 43m bisect fix android14-6.1 OK (0) job log log
2024/12/21 07:15 1h05m bisect fix android14-6.1 OK (0) job log log
2024/11/07 04:13 1h14m bisect fix android14-6.1 OK (0) job log log
2024/10/05 18:48 1h23m bisect fix android14-6.1 OK (0) job log log
2024/08/23 14:23 38m bisect fix android14-6.1 OK (0) job log log
2024/07/15 02:31 39m bisect fix android14-6.1 OK (0) job log log

Sample crash report:
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: 290 Comm: syz-executor314 Not tainted 6.1.141-syzkaller-00041-gde932537be34 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline]
RIP: 0010:security_inode_getattr+0x47/0x140 security/security.c:1359
Code: 3c ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 07 5f 80 ff 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 ea 5e 80 ff 4d 8b 36 49 83 c6 0c
RSP: 0018:ffffc90000e07040 EFLAGS: 00010206
RAX: 0000000000000006 RBX: ffffc90000e07410 RCX: ffff888107b8d100
RDX: 0000000000000000 RSI: ffffc90000e07420 RDI: ffffc90000e07410
RBP: ffffc90000e07068 R08: dffffc0000000000 R09: ffffc90000e07410
R10: 0000000000000000 R11: 0000000000000028 R12: ffffc90000e07410
R13: dffffc0000000000 R14: 0000000000000030 R15: 0000000000048002
FS:  0000555575069380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001600 CR3: 00000001040cf000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_getattr+0x29/0x310 fs/stat.c:158
 ovl_copy_up_one fs/overlayfs/copy_up.c:974 [inline]
 ovl_copy_up_flags+0x3c8/0x24b0 fs/overlayfs/copy_up.c:1060
 ovl_maybe_copy_up+0x160/0x190 fs/overlayfs/copy_up.c:1092
 ovl_open+0xf7/0x2e0 fs/overlayfs/file.c:155
 do_dentry_open+0x88e/0x1260 fs/open.c:884
 vfs_open fs/open.c:1015 [inline]
 dentry_open+0xbb/0x100 fs/open.c:1031
 file_open+0x298/0x630 fs/incfs/vfs.c:1501
 do_dentry_open+0x88e/0x1260 fs/open.c:884
 vfs_open+0x73/0x80 fs/open.c:1015
 do_open fs/namei.c:3625 [inline]
 path_openat+0x2681/0x2f50 fs/namei.c:3782
 do_filp_open+0x1c1/0x3c0 fs/namei.c:3809
 do_sys_openat2+0x185/0x7e0 fs/open.c:1341
 do_sys_open fs/open.c:1357 [inline]
 __do_sys_creat fs/open.c:1435 [inline]
 __se_sys_creat fs/open.c:1429 [inline]
 __x64_sys_creat+0x8e/0xb0 fs/open.c:1429
 x64_sys_call+0x116/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:86
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb6e6f29569
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc8785ee18 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007fb6e6f29569
RDX: 00007fb6e6f29569 RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00002000000000c0 R08: 00007ffc8785eff8 R09: 00007ffc8785eff8
R10: 00007ffc8785eff8 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 00007ffc8785efe8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline]
RIP: 0010:security_inode_getattr+0x47/0x140 security/security.c:1359
Code: 3c ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 07 5f 80 ff 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 ea 5e 80 ff 4d 8b 36 49 83 c6 0c
RSP: 0018:ffffc90000e07040 EFLAGS: 00010206
RAX: 0000000000000006 RBX: ffffc90000e07410 RCX: ffff888107b8d100
RDX: 0000000000000000 RSI: ffffc90000e07420 RDI: ffffc90000e07410
RBP: ffffc90000e07068 R08: dffffc0000000000 R09: ffffc90000e07410
R10: 0000000000000000 R11: 0000000000000028 R12: ffffc90000e07410
R13: dffffc0000000000 R14: 0000000000000030 R15: 0000000000048002
FS:  0000555575069380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001600 CR3: 00000001040cf000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	3c ff                	cmp    $0xff,%al
   2:	4c 8d 73 08          	lea    0x8(%rbx),%r14
   6:	4c 89 f0             	mov    %r14,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  12:	74 08                	je     0x1c
  14:	4c 89 f7             	mov    %r14,%rdi
  17:	e8 07 5f 80 ff       	call   0xff805f23
  1c:	4d 8b 36             	mov    (%r14),%r14
  1f:	49 83 c6 30          	add    $0x30,%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 ea 5e 80 ff       	call   0xff805f23
  39:	4d 8b 36             	mov    (%r14),%r14
  3c:	49 83 c6 0c          	add    $0xc,%r14

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/22 10:28 android14-6.1 de932537be34 1555463b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in security_inode_getattr
2025/03/22 10:35 android14-6.1 5145d157731f c6512ef7 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in security_inode_getattr
2024/03/26 18:22 android14-6.1 8790a94475c9 bcd9b39f .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in security_inode_getattr
2025/08/21 06:40 android14-6.1 26fad7be44e2 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in security_inode_getattr
2024/06/03 19:46 android14-6.1 997e6b3f6a21 0aba2352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in security_inode_getattr
2024/04/22 06:26 android14-6.1 dcb09569bbff af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in security_inode_getattr
2024/04/09 21:41 android14-6.1 5dc2bc296647 171ec371 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 general protection fault in security_inode_getattr
* Struck through repros no longer work on HEAD.