syzbot


general protection fault in security_inode_getattr (3)

Status: upstream: reported on 2024/08/30 08:49
Reported-by: syzbot+55f71ab000ad04739b30@syzkaller.appspotmail.com
First crash: 258d, last: 59d
Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 general protection fault in security_inode_getattr origin:downstream C 5 9d02h 415d 0/2 upstream: reported C repro on 2024/03/26 18:25
upstream general protection fault in security_inode_getattr overlayfs C done inconclusive 55 733d 1751d 0/28 auto-obsoleted due to no activity on 2023/08/23 09:02
linux-5.15 general protection fault in security_inode_getattr 1 545d 545d 0/3 auto-obsoleted due to no activity on 2024/02/25 11:36
android-54 general protection fault in security_inode_getattr C 3 46d 1711d 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 6 100d 232d 0/3 auto-obsoleted due to no activity on 2025/05/15 11:02
android-5-15 general protection fault in security_inode_getattr origin:downstream C error 4 35d 414d 0/2 upstream: reported C repro on 2024/03/27 12:21
linux-5.15 general protection fault in security_inode_getattr (2) 4 383d 423d 0/3 auto-obsoleted due to no activity on 2024/08/05 16:40
linux-4.19 general protection fault in security_inode_getattr C error 29 952d 1733d 0/1 upstream: reported C repro on 2020/08/16 14:26
linux-6.1 general protection fault in security_inode_getattr 4 340d 389d 0/3 auto-obsoleted due to no activity on 2024/09/17 16:33
android-5-10 general protection fault in security_inode_getattr C 18 12d 415d 0/2 upstream: reported C repro on 2024/03/26 17:56

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]
CPU: 0 PID: 4288 Comm: syz.1.15 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline]
RIP: 0010:security_inode_getattr+0x42/0x120 security/security.c:1346
Code: b2 fd 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 8c 20 fc fd 48 8b 2b 48 83 c5 68 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 ef e8 6f 20 fc fd 48 8b 6d 00 48 83 c5
RSP: 0018:ffffc90003227180 EFLAGS: 00010202
RAX: 000000000000000d RBX: ffffc900032275f8 RCX: 0000000000080000
RDX: ffffc9000defa000 RSI: 000000000000090c RDI: 000000000000090d
RBP: 0000000000000068 R08: dffffc0000000000 R09: ffffc900032275f0
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90003227600 R14: 0000000000000000 R15: ffffc900032275f0
FS:  00007fca1f3356c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000dcd000 CR3: 00000000750a9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_getattr+0x26/0x360 fs/stat.c:157
 ovl_copy_up_one fs/overlayfs/copy_up.c:965 [inline]
 ovl_copy_up_flags+0x5e7/0x3000 fs/overlayfs/copy_up.c:1051
 ovl_maybe_copy_up+0x14e/0x180 fs/overlayfs/copy_up.c:1083
 ovl_open+0xa4/0x200 fs/overlayfs/file.c:149
 do_dentry_open+0x807/0xfb0 fs/open.c:826
 do_open fs/namei.c:3608 [inline]
 path_openat+0x2705/0x2f20 fs/namei.c:3742
 do_filp_open+0x21c/0x460 fs/namei.c:3769
 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fca214ed169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fca1f335038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fca21706080 RCX: 00007fca214ed169
RDX: 0000000000000002 RSI: 0000400000000080 RDI: 0000000000000007
RBP: 00007fca2156e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fca21706080 R15: 00007ffe47270468
 </TASK>
Modules linked in:
---[ end trace a7d40de2fad6fb21 ]---
RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline]
RIP: 0010:security_inode_getattr+0x42/0x120 security/security.c:1346
Code: b2 fd 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 8c 20 fc fd 48 8b 2b 48 83 c5 68 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 ef e8 6f 20 fc fd 48 8b 6d 00 48 83 c5
RSP: 0018:ffffc90003227180 EFLAGS: 00010202
RAX: 000000000000000d RBX: ffffc900032275f8 RCX: 0000000000080000
RDX: ffffc9000defa000 RSI: 000000000000090c RDI: 000000000000090d
RBP: 0000000000000068 R08: dffffc0000000000 R09: ffffc900032275f0
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90003227600 R14: 0000000000000000 R15: ffffc900032275f0
FS:  00007fca1f3356c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3041aff8 CR3: 00000000750a9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	b2 fd                	mov    $0xfd,%dl
   2:	49 8d 5f 08          	lea    0x8(%r15),%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 8c 20 fc fd       	call   0xfdfc20a8
  1c:	48 8b 2b             	mov    (%rbx),%rbp
  1f:	48 83 c5 68          	add    $0x68,%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 ef             	mov    %rbp,%rdi
  34:	e8 6f 20 fc fd       	call   0xfdfc20a8
  39:	48 8b 6d 00          	mov    0x0(%rbp),%rbp
  3d:	48                   	rex.W
  3e:	83                   	.byte 0x83
  3f:	c5                   	.byte 0xc5

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/18 02:46 linux-5.15.y 0c935c049b5c ce3352cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in security_inode_getattr
2025/01/16 17:38 linux-5.15.y 4735586da88e f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in security_inode_getattr
2025/01/13 17:28 linux-5.15.y 4735586da88e 249ceea9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in security_inode_getattr
2024/12/17 23:30 linux-5.15.y 963e654022cc a0626d3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in security_inode_getattr
2024/12/12 06:40 linux-5.15.y 0a51d2d4527b 6f1b0fa8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in security_inode_getattr
2024/10/24 13:56 linux-5.15.y 74cdd62cb470 0d144d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in security_inode_getattr
2024/09/23 12:41 linux-5.15.y 3a5928702e71 89298aad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in security_inode_getattr
2024/08/30 08:48 linux-5.15.y fa93fa65db6e ee2602b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in security_inode_getattr
2024/12/02 09:01 linux-5.15.y 0a51d2d4527b 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in security_inode_getattr
* Struck through repros no longer work on HEAD.