syzbot


general protection fault in diRead

Status: upstream: reported on 2024/05/12 02:35
Reported-by: syzbot+2cf961f89e1c3a110b76@syzkaller.appspotmail.com
First crash: 43d, last: 40d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in diRead jfs C error error 4 395d 562d 0/27 auto-obsoleted due to no activity on 2023/09/03 06:21
upstream general protection fault in diRead (2) jfs 3 56d 154d 0/27 upstream: reported on 2024/01/22 18:21

Sample crash report:
loop0: detected capacity change from 0 to 32768
general protection fault, probably for non-canonical address 0xdffffc0000000104: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000820-0x0000000000000827]
CPU: 0 PID: 23247 Comm: syz-executor.0 Not tainted 6.1.90-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2662 [inline]
RIP: 0010:diRead+0x152/0xad0 fs/jfs/jfs_imap.c:316
Code: 8b 6d 80 48 89 6c 24 20 4c 8d b5 98 fc ff ff 4c 89 f7 be 01 00 00 00 e8 6c c4 65 fe 49 8d 9d 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 2f 10 de fe 4c 8b 3b 49 8d 6f 28
RSP: 0018:ffffc90005d17740 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff8880535c0430 R08: dffffc0000000000 R09: ffffed100a6b801b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000020
R13: 0000000000000000 R14: ffff8880535c00c8 R15: dffffc0000000000
FS:  00007fb05c8ba6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 000000005eced000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_iget+0x88/0x3b0 fs/jfs/inode.c:35
 jfs_lookup+0x222/0x400 fs/jfs/namei.c:1467
 __lookup_slow+0x27e/0x3d0 fs/namei.c:1690
 lookup_slow+0x53/0x70 fs/namei.c:1707
 walk_component+0x2d0/0x400 fs/namei.c:1998
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x16f/0x450 fs/namei.c:2479
 filename_lookup+0x251/0x600 fs/namei.c:2508
 user_path_at_empty+0x3e/0x60 fs/namei.c:2907
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3391 [inline]
 __do_sys_mount fs/namespace.c:3602 [inline]
 __se_sys_mount+0x296/0x3c0 fs/namespace.c:3579
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb05ba7dd69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb05c8ba0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb05bbabf80 RCX: 00007fb05ba7dd69
RDX: 0000000020000340 RSI: 0000000020000300 RDI: 0000000000000000
RBP: 00007fb05baca49e R08: 0000000020000500 R09: 0000000000000000
R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb05bbabf80 R15: 00007ffe5cf0d838
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2662 [inline]
RIP: 0010:diRead+0x152/0xad0 fs/jfs/jfs_imap.c:316
Code: 8b 6d 80 48 89 6c 24 20 4c 8d b5 98 fc ff ff 4c 89 f7 be 01 00 00 00 e8 6c c4 65 fe 49 8d 9d 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 2f 10 de fe 4c 8b 3b 49 8d 6f 28
RSP: 0018:ffffc90005d17740 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff8880535c0430 R08: dffffc0000000000 R09: ffffed100a6b801b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000020
R13: 0000000000000000 R14: ffff8880535c00c8 R15: dffffc0000000000
FS:  00007fb05c8ba6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555596b788 CR3: 000000005eced000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8b 6d 80             	mov    -0x80(%rbp),%ebp
   3:	48 89 6c 24 20       	mov    %rbp,0x20(%rsp)
   8:	4c 8d b5 98 fc ff ff 	lea    -0x368(%rbp),%r14
   f:	4c 89 f7             	mov    %r14,%rdi
  12:	be 01 00 00 00       	mov    $0x1,%esi
  17:	e8 6c c4 65 fe       	call   0xfe65c488
  1c:	49 8d 9d 20 08 00 00 	lea    0x820(%r13),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 2f 10 de fe       	call   0xfede1068
  39:	4c 8b 3b             	mov    (%rbx),%r15
  3c:	49 8d 6f 28          	lea    0x28(%r15),%rbp

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/15 04:02 linux-6.1.y 909ba1f1b414 fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in diRead
2024/05/12 02:34 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in diRead
* Struck through repros no longer work on HEAD.