syzbot


general protection fault in gfs2_evict_inode

Status: upstream: reported C repro on 2022/12/31 21:41
Subsystems: gfs2
[Documentation on labels]
Reported-by: syzbot+4bd2cd6bcb83d43d8106@syzkaller.appspotmail.com
First crash: 423d, last: 407d
Fix bisection: failed (error log, bisect log)
  
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in gfs2_evict_inode gfs2 2 844d 815d 0/26 auto-closed as invalid on 2022/03/06 05:03
linux-5.15 general protection fault in gfs2_evict_inode C done 4 269d 320d 3/3 fixed on 2023/07/07 16:05
upstream general protection fault in gfs2_evict_inode (2) gfs2 C error done 134 290d 610d 22/26 fixed on 2023/07/01 16:05
linux-6.1 BUG: unable to handle kernel paging request in gfs2_evict_inode origin:lts-only C inconclusive 3 269d 298d 0/3 upstream: reported C repro on 2023/05/05 09:09

Sample crash report:
RBP: 00007ffdb8973030 R08: 0000000000000001 R09: 00007ffdb8973040
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007ffdb8973070 R14: 00007ffdb8973050 R15: 0000000000000001
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8134 Comm: syz-executor224 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__lock_acquire+0x1eb/0x3ff0 kernel/locking/lockdep.c:3295
Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 20 f2 66 8c 0f 84 65 ff ff
RSP: 0018:ffff8880afe37670 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880af918340 R14: 0000000000000038 R15: 0000000000000001
FS:  0000555556630300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6f9dc6138 CR3: 00000000a2996000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
 spin_lock include/linux/spinlock.h:329 [inline]
 glock_clear_object fs/gfs2/glock.h:297 [inline]
 gfs2_evict_inode+0x773/0x14b0 fs/gfs2/super.c:1711
 evict+0x2ed/0x760 fs/inode.c:559
 iput_final fs/inode.c:1555 [inline]
 iput+0x4f1/0x860 fs/inode.c:1581
 gfs2_inode_lookup+0x45b/0xa50 fs/gfs2/inode.c:214
 gfs2_lookup_by_inum+0x44/0x170 fs/gfs2/inode.c:225
 gfs2_get_dentry fs/gfs2/export.c:140 [inline]
 gfs2_fh_to_dentry fs/gfs2/export.c:163 [inline]
 gfs2_fh_to_dentry+0x20c/0x290 fs/gfs2/export.c:147
 exportfs_decode_fh+0x126/0x7e0 fs/exportfs/expfs.c:433
 do_handle_to_path fs/fhandle.c:152 [inline]
 handle_to_path fs/fhandle.c:207 [inline]
 do_handle_open+0x2f4/0x650 fs/fhandle.c:223
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fb6f9d41a19
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdb8973008 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb6f9d41a19
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007ffdb8973030 R08: 0000000000000001 R09: 00007ffdb8973040
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007ffdb8973070 R14: 00007ffdb8973050 R15: 0000000000000001
Modules linked in:
---[ end trace a2b629d592e65574 ]---
RIP: 0010:__lock_acquire+0x1eb/0x3ff0 kernel/locking/lockdep.c:3295
Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 20 f2 66 8c 0f 84 65 ff ff
RSP: 0018:ffff8880afe37670 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880af918340 R14: 0000000000000038 R15: 0000000000000001
FS:  0000555556630300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6f9dc6138 CR3: 00000000a2996000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	2b 29                	sub    (%rcx),%ebp
   2:	00 00                	add    %al,(%rax)
   4:	48 81 c4 98 01 00 00 	add    $0x198,%rsp
   b:	44 89 f8             	mov    %r15d,%eax
   e:	5b                   	pop    %rbx
   f:	5d                   	pop    %rbp
  10:	41 5c                	pop    %r12
  12:	41 5d                	pop    %r13
  14:	41 5e                	pop    %r14
  16:	41 5f                	pop    %r15
  18:	c3                   	retq
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 f2             	mov    %r14,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 b3 2a 00 00    	jne    0x2ae7
  34:	49 81 3e 20 f2 66 8c 	cmpq   $0xffffffff8c66f220,(%r14)
  3b:	0f                   	.byte 0xf
  3c:	84 65 ff             	test   %ah,-0x1(%rbp)
  3f:	ff                   	.byte 0xff

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/01/14 09:44 linux-4.19.y 3f8a27f9e27b 529798b0 .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci2-linux-4-19 general protection fault in gfs2_evict_inode
2022/12/31 21:56 linux-4.19.y 3f8a27f9e27b ab32d508 .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci2-linux-4-19 general protection fault in gfs2_evict_inode
2023/01/17 01:14 linux-4.19.y 3f8a27f9e27b a63719e7 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 general protection fault in gfs2_evict_inode
2023/01/06 07:57 linux-4.19.y 3f8a27f9e27b 1dac8c7a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 general protection fault in gfs2_evict_inode
2022/12/31 21:40 linux-4.19.y 3f8a27f9e27b ab32d508 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 general protection fault in gfs2_evict_inode
* Struck through repros no longer work on HEAD.