syzbot


general protection fault in do_journal_end

Status: upstream: reported C repro on 2022/11/30 04:17
Subsystems: reiserfs
[Documentation on labels]
Reported-by: syzbot+757cbeb62a22b9a7cc96@syzkaller.appspotmail.com
First crash: 738d, last: 689d
Fix bisection: failed (error log, bisect log)
  
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 general protection fault in do_journal_end reiserfs C 2 665d 702d 0/1 upstream: reported C repro on 2023/01/05 12:44
linux-6.1 BUG: unable to handle kernel paging request in do_journal_end origin:upstream C error 12 32d 474d 0/3 upstream: reported C repro on 2023/08/21 09:50
upstream KASAN: null-ptr-deref Read in do_journal_end (2) reiserfs C error done 40699 334d 860d 0/28 auto-obsoleted due to no activity on 2024/03/18 13:22
linux-5.15 KASAN: null-ptr-deref Read in do_journal_end origin:upstream C error 6 62d 611d 0/3 upstream: reported C repro on 2023/04/06 14:35
upstream KASAN: null-ptr-deref Read in do_journal_end reiserfs 1 1140d 1136d 0/28 auto-closed as invalid on 2022/02/20 18:03

Sample crash report:
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
audit: type=1800 audit(1674004439.429:2): pid=8115 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor337" name="bus" dev="loop0" ino=4 res=0
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: 8115 Comm: syz-executor337 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:317 [inline]
RIP: 0010:set_buffer_uptodate include/linux/buffer_head.h:120 [inline]
RIP: 0010:do_journal_end+0x12cd/0x4840 fs/reiserfs/journal.c:4093
Code: 0f 85 cf 2b 00 00 48 8b 7b 18 b9 08 00 00 00 e8 79 c6 d9 ff 48 89 c2 48 89 44 24 78 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 92 2b 00 00 4c 8b 74 24 78 31 ff 49 8b 1e 83 e3
RSP: 0018:ffff88809520fa08 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffc90001b22000 RCX: ffffffff81b0a8f6
RDX: 0000000000000000 RSI: ffffffff81b0ac88 RDI: 0000000000000005
RBP: ffff888089d4e000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000001e R14: ffff88809520fb50 R15: ffffc90001b22000
FS:  00005555560ad300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbcb2ca74e8 CR3: 0000000009e6d000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 reiserfs_sync_fs+0xf8/0x120 fs/reiserfs/super.c:78
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem+0x105/0x250 fs/sync.c:64
 generic_shutdown_super+0x70/0x370 fs/super.c:442
 kill_block_super+0x97/0xf0 fs/super.c:1185
 deactivate_locked_super+0x94/0x160 fs/super.c:329
 deactivate_super+0x174/0x1a0 fs/super.c:360
 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xbf3/0x2be0 kernel/exit.c:870
 do_group_exit+0x125/0x310 kernel/exit.c:967
 __do_sys_exit_group kernel/exit.c:978 [inline]
 __se_sys_exit_group kernel/exit.c:976 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fbcb2c62ae9
Code: Bad RIP value.
RSP: 002b:00007ffc5cebb4c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fbcb2cd8350 RCX: 00007fbcb2c62ae9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fbcb2cd2e40
R10: 000080001d00c0d0 R11: 0000000000000246 R12: 00007fbcb2cd8350
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
Modules linked in:
---[ end trace 2c86fcfc4d357a50 ]---
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:317 [inline]
RIP: 0010:set_buffer_uptodate include/linux/buffer_head.h:120 [inline]
RIP: 0010:do_journal_end+0x12cd/0x4840 fs/reiserfs/journal.c:4093
Code: 0f 85 cf 2b 00 00 48 8b 7b 18 b9 08 00 00 00 e8 79 c6 d9 ff 48 89 c2 48 89 44 24 78 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 92 2b 00 00 4c 8b 74 24 78 31 ff 49 8b 1e 83 e3
RSP: 0018:ffff88809520fa08 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffc90001b22000 RCX: ffffffff81b0a8f6
RDX: 0000000000000000 RSI: ffffffff81b0ac88 RDI: 0000000000000005
RBP: ffff888089d4e000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000001e R14: ffff88809520fb50 R15: ffffc90001b22000
FS:  00005555560ad300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbcb2c62abf CR3: 0000000009e6d000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f 85 cf 2b 00 00    	jne    0x2bd5
   6:	48 8b 7b 18          	mov    0x18(%rbx),%rdi
   a:	b9 08 00 00 00       	mov    $0x8,%ecx
   f:	e8 79 c6 d9 ff       	callq  0xffd9c68d
  14:	48 89 c2             	mov    %rax,%rdx
  17:	48 89 44 24 78       	mov    %rax,0x78(%rsp)
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 92 2b 00 00    	jne    0x2bc6
  34:	4c 8b 74 24 78       	mov    0x78(%rsp),%r14
  39:	31 ff                	xor    %edi,%edi
  3b:	49 8b 1e             	mov    (%r14),%rbx
  3e:	83                   	.byte 0x83
  3f:	e3                   	.byte 0xe3

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/01/18 01:15 linux-4.19.y 3f8a27f9e27b 42660d9e .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci2-linux-4-19 general protection fault in do_journal_end
2023/01/09 10:49 linux-4.19.y 3f8a27f9e27b 1dac8c7a .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci2-linux-4-19 general protection fault in do_journal_end
2022/11/30 04:17 linux-4.19.y 3f8a27f9e27b 579a3740 .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci2-linux-4-19 general protection fault in do_journal_end
* Struck through repros no longer work on HEAD.