syzbot


general protection fault in security_inode_getattr

Status: upstream: reported C repro on 2024/03/26 17:56
Reported-by: syzbot+bc21724b4b0f821fa06b@syzkaller.appspotmail.com
First crash: 88d, last: 15d
Similar bugs (8)
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 4 19d 88d 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 406d 1424d 0/27 auto-obsoleted due to no activity on 2023/08/23 09:02
linux-5.15 general protection fault in security_inode_getattr 1 218d 218d 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 2d22h 1383d 0/2 upstream: reported C repro on 2020/09/08 02:23
android-5-15 general protection fault in security_inode_getattr origin:downstream C 1 11d 87d 0/2 upstream: reported C repro on 2024/03/27 12:21
linux-5.15 general protection fault in security_inode_getattr (2) 4 56d 96d 0/3 upstream: reported on 2024/03/18 14:23
linux-4.19 general protection fault in security_inode_getattr C error 29 625d 1406d 0/1 upstream: reported C repro on 2020/08/16 14:26
linux-6.1 general protection fault in security_inode_getattr 4 13d 61d 0/3 upstream: reported on 2024/04/22 01:07
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/05/20 22:13 11m retest repro android13-5.10-lts error OK
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/06/07 09:21 32m bisect fix android13-5.10-lts job log (0) 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: 0 PID: 286 Comm: syz-executor290 Not tainted 5.10.209-syzkaller-00001-ge7daca75b4c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:d_backing_inode include/linux/dcache.h:558 [inline]
RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1265
Code: 3f ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 87 d6 7c ff 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 6a d6 7c ff 48 8b 1b 48 83 c3 0c
RSP: 0018:ffffc90000bc6f90 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88811ee8bb40
RDX: 0000000000000000 RSI: ffffc90000bc7400 RDI: ffffc90000bc73f0
RBP: ffffc90000bc6fb8 R08: dffffc0000000000 R09: ffffc90000bc73f0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000bc7400
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc90000bc73f0
FS:  0000555556717480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011932e000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vfs_getattr+0x26/0x70 fs/stat.c:129
 ovl_copy_up_one fs/overlayfs/copy_up.c:882 [inline]
 ovl_copy_up_flags+0x5af/0x2700 fs/overlayfs/copy_up.c:964
 ovl_maybe_copy_up+0x15a/0x190 fs/overlayfs/copy_up.c:996
 ovl_open+0xad/0x210 fs/overlayfs/file.c:156
 do_dentry_open+0x7c1/0x10d0 fs/open.c:819
 vfs_open fs/open.c:942 [inline]
 dentry_open+0xb8/0x100 fs/open.c:958
 file_open+0x2a7/0x650 fs/incfs/vfs.c:1450
 do_dentry_open+0x7c1/0x10d0 fs/open.c:819
 vfs_open+0x73/0x80 fs/open.c:942
 do_open fs/namei.c:3397 [inline]
 path_openat+0x2660/0x3000 fs/namei.c:3515
 do_filp_open+0x21c/0x460 fs/namei.c:3542
 do_sys_openat2+0x13f/0x6f0 fs/open.c:1217
 do_sys_open fs/open.c:1233 [inline]
 __do_sys_openat fs/open.c:1249 [inline]
 __se_sys_openat fs/open.c:1244 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1244
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f3367ffa019
Code: 48 83 c4 28 c3 e8 67 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:00007ffe3f58e9d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffe3f58e9e0 RCX: 00007f3367ffa019
RDX: 0000000000000002 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007ffe3f58e9e8 R08: 00007f3367fc70a0 R09: 00007f3367fc70a0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe3f58ec48 R14: 0000000000000001 R15: 0000000000000001
Modules linked in:
---[ end trace 084dfe476fed37d8 ]---
RIP: 0010:d_backing_inode include/linux/dcache.h:558 [inline]
RIP: 0010:security_inode_getattr+0x47/0x130 security/security.c:1265
Code: 3f ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 87 d6 7c ff 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 6a d6 7c ff 48 8b 1b 48 83 c3 0c
RSP: 0018:ffffc90000bc6f90 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88811ee8bb40
RDX: 0000000000000000 RSI: ffffc90000bc7400 RDI: ffffc90000bc73f0
RBP: ffffc90000bc6fb8 R08: dffffc0000000000 R09: ffffc90000bc73f0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000bc7400
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc90000bc73f0
FS:  0000555556717480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011932e000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	ff 49 8d             	decl   -0x73(%rcx)
   3:	5f                   	pop    %rdi
   4:	08 48 89             	or     %cl,-0x77(%rax)
   7:	d8 48 c1             	fmuls  -0x3f(%rax)
   a:	e8 03 42 80 3c       	call   0x3c804212
   f:	28 00                	sub    %al,(%rax)
  11:	74 08                	je     0x1b
  13:	48 89 df             	mov    %rbx,%rdi
  16:	e8 87 d6 7c ff       	call   0xff7cd6a2
  1b:	48 8b 1b             	mov    (%rbx),%rbx
  1e:	48 83 c3 30          	add    $0x30,%rbx
  22:	48 89 d8             	mov    %rbx,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 6a d6 7c ff       	call   0xff7cd6a2
  38:	48 8b 1b             	mov    (%rbx),%rbx
  3b:	48 83 c3 0c          	add    $0xc,%rbx

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/26 17:55 android13-5.10-lts e7daca75b4c3 bcd9b39f .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in security_inode_getattr
2024/05/06 18:33 android13-5.10-lts 70b6ab09a34b d884b519 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in security_inode_getattr
2024/04/25 06:41 android13-5.10-lts 70b6ab09a34b 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in security_inode_getattr
2024/04/12 10:50 android13-5.10-lts 4e1bc8d8e8ae 27de0a5c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in security_inode_getattr
2024/04/10 01:34 android13-5.10-lts 4e1bc8d8e8ae 171ec371 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in security_inode_getattr
2024/04/04 01:34 android13-5.10-lts e7daca75b4c3 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in security_inode_getattr
2024/03/26 17:30 android13-5.10-lts e7daca75b4c3 bcd9b39f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in security_inode_getattr
* Struck through repros no longer work on HEAD.