syzbot


general protection fault in diRead (2)

Status: upstream: reported on 2024/01/22 18:21
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+8f731999dc47797f064f@syzkaller.appspotmail.com
First crash: 84d, last: 81d
Discussions (2)
Title Replies (including bot) Last reply
Re: [syzbot] [jfs?] general protection fault in diRead (2) 1 (1) 2024/03/07 07:10
[syzbot] [jfs?] general protection fault in diRead (2) 0 (1) 2024/01/22 18:21
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in diRead jfs C error error 4 325d 492d 0/26 auto-obsoleted due to no activity on 2023/09/03 06:21

Sample crash report:
loop2: 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: 1 PID: 15012 Comm: syz-executor.2 Not tainted 6.8.0-rc1-syzkaller-00037-g443b349019f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2662 [inline]
RIP: 0010:diRead+0x158/0xae0 fs/jfs/jfs_imap.c:316
Code: 8d 5d 80 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 69 d4 d7 fe 4c 8b 2b 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 49 d4 d7 fe 4c 8b 3b 49 8d 5f 28
RSP: 0018:ffffc9000615f718 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88804879e9f0 R08: ffff88804879e697 R09: 1ffff110090f3cd2
R10: dffffc0000000000 R11: ffffed10090f3cd3 R12: 0000000000000020
R13: 0000000000000000 R14: ffff88804879e688 R15: dffffc0000000000
FS:  00007f6c6172e6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c5fdddf00 CR3: 000000001f7ca000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_iget+0x8c/0x3b0 fs/jfs/inode.c:35
 jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469
 __lookup_slow+0x282/0x3e0 fs/namei.c:1693
 lookup_slow+0x53/0x70 fs/namei.c:1710
 walk_component+0x2d0/0x400 fs/namei.c:2001
 lookup_last fs/namei.c:2458 [inline]
 path_lookupat+0x16f/0x450 fs/namei.c:2482
 filename_lookup+0x255/0x610 fs/namei.c:2511
 user_path_at_empty+0x42/0x60 fs/namei.c:2920
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3689 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x29a/0x3c0 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f6c60a7cda9
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:00007f6c6172e0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6c60babf80 RCX: 00007f6c60a7cda9
RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000000000000
RBP: 00007f6c60ac947a R08: 0000000020002680 R09: 0000000000000000
R10: 0000000000020000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6c60babf80 R15: 00007fff0835b838
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2662 [inline]
RIP: 0010:diRead+0x158/0xae0 fs/jfs/jfs_imap.c:316
Code: 8d 5d 80 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 69 d4 d7 fe 4c 8b 2b 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 49 d4 d7 fe 4c 8b 3b 49 8d 5f 28
RSP: 0018:ffffc9000615f718 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88804879e9f0 R08: ffff88804879e697 R09: 1ffff110090f3cd2
R10: dffffc0000000000 R11: ffffed10090f3cd3 R12: 0000000000000020
R13: 0000000000000000 R14: ffff88804879e688 R15: dffffc0000000000
FS:  00007f6c6172e6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff2508d5000 CR3: 000000001f7ca000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8d 5d 80             	lea    -0x80(%rbp),%ebx
   3:	48 89 d8             	mov    %rbx,%rax
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
   f:	74 08                	je     0x19
  11:	48 89 df             	mov    %rbx,%rdi
  14:	e8 69 d4 d7 fe       	call   0xfed7d482
  19:	4c 8b 2b             	mov    (%rbx),%r13
  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 49 d4 d7 fe       	call   0xfed7d482
  39:	4c 8b 3b             	mov    (%rbx),%r15
  3c:	49 8d 5f 28          	lea    0x28(%r15),%rbx

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/01/25 07:50 upstream 443b349019f2 1e153dc8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in diRead
2024/01/22 13:33 upstream 6613476e225e 9bd8dcda .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in diRead
* Struck through repros no longer work on HEAD.