syzbot


BUG: unable to handle kernel paging request in udf_free_inode
Status: auto-closed as invalid on 2022/01/25 11:13
Reported-by: syzbot+1c559989cf06354d17bc@syzkaller.appspotmail.com
First crash: 212d, last: 212d

Sample crash report:
BUG: unable to handle page fault for address: ffffed101d6c9d0e
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffef067 P4D 23ffef067 PUD 13fff6067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 26830 Comm: syz-executor.5 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:le32_add_cpu include/linux/byteorder/generic.h:151 [inline]
RIP: 0010:udf_free_inode+0xe8/0x350 fs/udf/ialloc.c:40
Code: 2e 97 bc fe 66 41 81 fe 00 40 0f 84 89 01 00 00 e8 5d 90 bc fe 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a6
RSP: 0018:ffffc9000473fc70 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffff8880873cbb00 RCX: 0000000000000000
RDX: 1ffff1101d6c9d0e RSI: ffffffff82ba5cb3 RDI: ffff8880eb64e870
RBP: ffff8880eb64e850 R08: 0000000000000000 R09: 0000000000008000
R10: ffffffff82ba5ca2 R11: 0000000000004000 R12: ffff888076740000
R13: ffff88807761d8c0 R14: 0000000000008000 R15: ffff888076740678
FS:  00005555571a4400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed101d6c9d0e CR3: 0000000019995000 CR4: 0000000000350ee0
Call Trace:
 udf_evict_inode+0x348/0x580 fs/udf/inode.c:164
 evict+0x2ed/0x6b0 fs/inode.c:588
 iput_final fs/inode.c:1664 [inline]
 iput.part.0+0x539/0x850 fs/inode.c:1690
 iput+0x58/0x70 fs/inode.c:1680
 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:376
 __dentry_kill+0x3c0/0x640 fs/dcache.c:582
 dentry_kill fs/dcache.c:720 [inline]
 dput+0x66b/0xbc0 fs/dcache.c:888
 __fput+0x3ad/0x9f0 fs/file_table.c:293
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f124f83367b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffe9ecb9180 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f124f83367b
RDX: 00007f124f989540 RSI: 00000000000f4240 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f124f9893c0
R10: 00007ffe9ed32090 R11: 0000000000000293 R12: 0000000000092dde
R13: 00000000000003e8 R14: 00007f124f983f60 R15: 0000000000092a2f
Modules linked in:
CR2: ffffed101d6c9d0e
---[ end trace 644a8be848efdff4 ]---
RIP: 0010:le32_add_cpu include/linux/byteorder/generic.h:151 [inline]
RIP: 0010:udf_free_inode+0xe8/0x350 fs/udf/ialloc.c:40
Code: 2e 97 bc fe 66 41 81 fe 00 40 0f 84 89 01 00 00 e8 5d 90 bc fe 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a6
RSP: 0018:ffffc9000473fc70 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffff8880873cbb00 RCX: 0000000000000000
RDX: 1ffff1101d6c9d0e RSI: ffffffff82ba5cb3 RDI: ffff8880eb64e870
RBP: ffff8880eb64e850 R08: 0000000000000000 R09: 0000000000008000
R10: ffffffff82ba5ca2 R11: 0000000000004000 R12: ffff888076740000
R13: ffff88807761d8c0 R14: 0000000000008000 R15: ffff888076740678
FS:  00005555571a4400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed101d6c9d0e CR3: 0000000019995000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess):
   0:	2e 97                	cs xchg %eax,%edi
   2:	bc fe 66 41 81       	mov    $0x814166fe,%esp
   7:	fe 00                	incb   (%rax)
   9:	40 0f 84 89 01 00 00 	rex je 0x199
  10:	e8 5d 90 bc fe       	callq  0xfebc9072
  15:	48 8d 7d 20          	lea    0x20(%rbp),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx <-- trapping instruction
  2e:	48 89 f8             	mov    %rdi,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 08                	jl     0x43
  3b:	84 d2                	test   %dl,%dl
  3d:	0f                   	.byte 0xf
  3e:	85                   	.byte 0x85
  3f:	a6                   	cmpsb  %es:(%rdi),%ds:(%rsi)

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2021/10/27 11:12 upstream d25f27432f80 d50eb50a .config log report info BUG: unable to handle kernel paging request in udf_free_inode