syzbot


general protection fault in open_xa_dir (2)

Status: auto-closed as invalid on 2022/07/04 17:03
Reported-by: syzbot+8f108cb55aab961d8ce0@syzkaller.appspotmail.com
First crash: 234d, last: 234d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel paging request in open_xa_dir C 54 2d19h 82d 0/24 upstream: reported C repro on 2022/09/05 08:53
upstream general protection fault in open_xa_dir C done 3 775d 786d 17/24 fixed on 2020/11/16 12:12
linux-4.14 general protection fault in open_xa_dir C done 1 795d 795d 1/1 fixed on 2020/10/22 20:19
linux-4.19 general protection fault in open_xa_dir C unreliable 1 787d 787d 0/1 upstream: reported C repro on 2020/09/30 05:05

Sample crash report:
general protection fault, probably for non-canonical address 0xf1287c058b117d2a: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0x8944002c588be950-0x8944002c588be957]
CPU: 0 PID: 12710 Comm: syz-executor.2 Not tainted 5.18.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xcf/0x2b00 kernel/locking/lockdep.c:4899
Code: 85 d1 1d 00 00 83 3d 53 54 ba 0c 00 48 89 9c 24 b8 00 00 00 0f 84 9d 11 00 00 83 3d aa 9a 57 0b 00 74 2d 48 89 f8 48 c1 e8 03 <80> 3c 30 00 74 14 e8 c6 b2 70 00 48 8b 7c 24 40 48 be 00 00 00 00
RSP: 0018:ffffc9000eaef200 EFLAGS: 00010803
RAX: 112880058b117d2a RBX: 1ffff92001d5de58 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 8944002c588be955
RBP: ffffc9000eaef350 R08: 0000000000000001 R09: 0000000000000000
R10: fffffbfff1c426fe R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f09e97fe700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8086b691b8 CR3: 0000000076f34000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000009448
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5641
 down_write_nested+0xa1/0x180 kernel/locking/rwsem.c:1624
 inode_lock_nested include/linux/fs.h:783 [inline]
 open_xa_root fs/reiserfs/xattr.c:127 [inline]
 open_xa_dir+0x132/0x5e0 fs/reiserfs/xattr.c:152
 xattr_lookup+0x24/0x280 fs/reiserfs/xattr.c:395
 reiserfs_xattr_get+0xfb/0x4f0 fs/reiserfs/xattr.c:684
 reiserfs_get_acl+0x7b/0x690 fs/reiserfs/xattr_acl.c:214
 get_acl+0x154/0x2e0 fs/posix_acl.c:152
 check_acl fs/namei.c:305 [inline]
 acl_permission_check fs/namei.c:350 [inline]
 generic_permission+0x3a4/0x710 fs/namei.c:403
 do_inode_permission fs/namei.c:457 [inline]
 inode_permission+0x2b6/0x6b0 fs/namei.c:524
 may_open+0x228/0x3e0 fs/namei.c:3101
 do_open fs/namei.c:3474 [inline]
 path_openat+0x25ad/0x3690 fs/namei.c:3609
 do_filp_open+0x277/0x4f0 fs/namei.c:3636
 do_sys_openat2+0x13b/0x500 fs/open.c:1213
 do_sys_open fs/open.c:1229 [inline]
 __do_sys_openat fs/open.c:1245 [inline]
 __se_sys_openat fs/open.c:1240 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1240
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f09ea83bf64
Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44
RSP: 002b:00007f09e97fdf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f09ea83bf64
RDX: 0000000000010000 RSI: 0000000020000100 RDI: 00000000ffffff9c
RBP: 0000000020000100 R08: 0000000000000000 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000
R13: 0000000020000100 R14: 00007f09e97fdfe0 R15: 000000002006d200
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xcf/0x2b00 kernel/locking/lockdep.c:4899
Code: 85 d1 1d 00 00 83 3d 53 54 ba 0c 00 48 89 9c 24 b8 00 00 00 0f 84 9d 11 00 00 83 3d aa 9a 57 0b 00 74 2d 48 89 f8 48 c1 e8 03 <80> 3c 30 00 74 14 e8 c6 b2 70 00 48 8b 7c 24 40 48 be 00 00 00 00
RSP: 0018:ffffc9000eaef200 EFLAGS: 00010803
RAX: 112880058b117d2a RBX: 1ffff92001d5de58 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 8944002c588be955
RBP: ffffc9000eaef350 R08: 0000000000000001 R09: 0000000000000000
R10: fffffbfff1c426fe R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f09e97fe700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8086b691b8 CR3: 0000000076f34000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000009448
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	85 d1                	test   %edx,%ecx
   2:	1d 00 00 83 3d       	sbb    $0x3d830000,%eax
   7:	53                   	push   %rbx
   8:	54                   	push   %rsp
   9:	ba 0c 00 48 89       	mov    $0x8948000c,%edx
   e:	9c                   	pushfq
   f:	24 b8                	and    $0xb8,%al
  11:	00 00                	add    %al,(%rax)
  13:	00 0f                	add    %cl,(%rdi)
  15:	84 9d 11 00 00 83    	test   %bl,-0x7cffffef(%rbp)
  1b:	3d aa 9a 57 0b       	cmp    $0xb579aaa,%eax
  20:	00 74 2d 48          	add    %dh,0x48(%rbp,%rbp,1)
  24:	89 f8                	mov    %edi,%eax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 30 00          	cmpb   $0x0,(%rax,%rsi,1) <-- trapping instruction
  2e:	74 14                	je     0x44
  30:	e8 c6 b2 70 00       	callq  0x70b2fb
  35:	48 8b 7c 24 40       	mov    0x40(%rsp),%rdi
  3a:	48                   	rex.W
  3b:	be 00 00 00 00       	mov    $0x0,%esi

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2022/04/05 17:02 upstream 312310928417 0127c10f .config log report info general protection fault in open_xa_dir
* Struck through repros no longer work on HEAD.