find_entry called with index = 0
read_mapping_page failed!
ERROR: (device loop0): txAbort: 
 ... Log Wrap ... Log Wrap ... Log Wrap ...
 ... Log Wrap ... Log Wrap ... Log Wrap ...
BUG: kernel NULL pointer dereference, address: 0000000000000040
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 8000000135ecd067 P4D 8000000135ecd067 PUD 135b52067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 1 PID: 4575 Comm: syz-executor.0 Not tainted 5.1.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:314 [inline]
RIP: 0010:txBegin+0x136/0x3a0 fs/jfs/jfs_txnmgr.c:379
Code: 48 8b 45 a0 e8 cb 60 e1 00 e8 76 32 ba ff 48 8d 75 a8 48 c7 c7 08 99 c3 83 e8 56 b9 bb ff 48 c7 c7 e0 e5 0d 83 e8 7a 5f e1 00 <49> 8b 44 24 40 a8 04 0f 85 c7 00 00 00 49 8b 44 24 40 a8 08 0f 85
RSP: 0018:ffffc90000f3ba48 EFLAGS: 00010246
RAX: 0000000000000138 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 000000008e3e83d0 RDI: ffffffff830de5e0
RBP: ffffc90000f3bad8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff830de5f8 R11: 00000000000006d8 R12: 0000000000000000
R13: ffffffff810ec820 R14: ffffffff83c39900 R15: 0000000024cd3118
FS:  00007fd18ff496c0(0000) GS:ffff88813bb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000040 CR3: 00000001329e8000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 jfs_create+0xca/0x360 fs/jfs/namei.c:111
 lookup_open+0x2cd/0x8a0 fs/namei.c:3232
 do_last fs/namei.c:3322 [inline]
 path_openat+0x50a/0xc40 fs/namei.c:3533
 do_filp_open+0x8e/0x100 fs/namei.c:3563
 do_sys_open+0x17d/0x220 fs/open.c:1069
 __do_sys_openat fs/open.c:1096 [inline]
 __se_sys_openat fs/open.c:1090 [inline]
 __x64_sys_openat+0x1b/0x20 fs/open.c:1090
 do_syscall_64+0x55/0x170 arch/x86/entry/common.c:298
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fd1903c7e69
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:00007fd18ff490c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fd1904f5f80 RCX: 00007fd1903c7e69
RDX: 000000000000275a RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007fd19041447a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007fd1904f5f80 R15: 00007ffcb2348c38
Modules linked in:
CR2: 0000000000000040
---[ end trace 74d77e8c7e5b5ddd ]---
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:314 [inline]
RIP: 0010:txBegin+0x136/0x3a0 fs/jfs/jfs_txnmgr.c:379
Code: 48 8b 45 a0 e8 cb 60 e1 00 e8 76 32 ba ff 48 8d 75 a8 48 c7 c7 08 99 c3 83 e8 56 b9 bb ff 48 c7 c7 e0 e5 0d 83 e8 7a 5f e1 00 <49> 8b 44 24 40 a8 04 0f 85 c7 00 00 00 49 8b 44 24 40 a8 08 0f 85
RSP: 0018:ffffc90000f3ba48 EFLAGS: 00010246
RAX: 0000000000000138 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 000000008e3e83d0 RDI: ffffffff830de5e0
RBP: ffffc90000f3bad8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff830de5f8 R11: 00000000000006d8 R12: 0000000000000000
R13: ffffffff810ec820 R14: ffffffff83c39900 R15: 0000000024cd3118
FS:  00007fd18ff496c0(0000) GS:ffff88813bb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000040 CR3: 00000001329e8000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 8b 45 a0          	mov    -0x60(%rbp),%rax
   4:	e8 cb 60 e1 00       	call   0xe160d4
   9:	e8 76 32 ba ff       	call   0xffba3284
   e:	48 8d 75 a8          	lea    -0x58(%rbp),%rsi
  12:	48 c7 c7 08 99 c3 83 	mov    $0xffffffff83c39908,%rdi
  19:	e8 56 b9 bb ff       	call   0xffbbb974
  1e:	48 c7 c7 e0 e5 0d 83 	mov    $0xffffffff830de5e0,%rdi
  25:	e8 7a 5f e1 00       	call   0xe15fa4
* 2a:	49 8b 44 24 40       	mov    0x40(%r12),%rax <-- trapping instruction
  2f:	a8 04                	test   $0x4,%al
  31:	0f 85 c7 00 00 00    	jne    0xfe
  37:	49 8b 44 24 40       	mov    0x40(%r12),%rax
  3c:	a8 08                	test   $0x8,%al
  3e:	0f                   	.byte 0xf
  3f:	85                   	.byte 0x85