syzbot

Oops: stack segment: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 122 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:folio_flags include/linux/page-flags.h:360 [inline]
RIP: 0010:folio_trylock include/linux/pagemap.h:1133 [inline]
RIP: 0010:folio_lock include/linux/pagemap.h:1169 [inline]
RIP: 0010:release_metapage+0x9e/0xab0 fs/jfs/jfs_metapage.c:870
Code: 04 00 00 e8 b4 04 77 fe 48 c7 c7 f3 e1 36 8d be 90 04 00 00 e8 d3 b2 47 fe 2e 2e 2e 31 c0 49 8d 5c 24 08 48 89 dd 48 c1 ed 03 <42> 80 7c 2d 00 00 74 08 48 89 df e8 c2 68 db fe 4c 8b 3b 4c 89 fe
RSP: 0018:ffffc900039d76d8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8d592237 RDI: ffffffff8b85e800
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100b1e89d2 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888058f44e68 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000003c434000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 xtTruncate+0xecd/0x2f20 fs/jfs/jfs_xtree.c:-1
 jfs_free_zero_link+0x35b/0x4c0 fs/jfs/namei.c:759
 jfs_evict_inode+0x363/0x440 fs/jfs/inode.c:159
 evict+0x61e/0xb10 fs/inode.c:837
 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
 jfs_lazycommit+0x3ef/0xa10 fs/jfs/jfs_txnmgr.c:2734
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_flags include/linux/page-flags.h:360 [inline]
RIP: 0010:folio_trylock include/linux/pagemap.h:1133 [inline]
RIP: 0010:folio_lock include/linux/pagemap.h:1169 [inline]
RIP: 0010:release_metapage+0x9e/0xab0 fs/jfs/jfs_metapage.c:870
Code: 04 00 00 e8 b4 04 77 fe 48 c7 c7 f3 e1 36 8d be 90 04 00 00 e8 d3 b2 47 fe 2e 2e 2e 31 c0 49 8d 5c 24 08 48 89 dd 48 c1 ed 03 <42> 80 7c 2d 00 00 74 08 48 89 df e8 c2 68 db fe 4c 8b 3b 4c 89 fe
RSP: 0018:ffffc900039d76d8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8d592237 RDI: ffffffff8b85e800
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100b1e89d2 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888058f44e68 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000003c434000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	04 00                	add    $0x0,%al
   2:	00 e8                	add    %ch,%al
   4:	b4 04                	mov    $0x4,%ah
   6:	77 fe                	ja     0x6
   8:	48 c7 c7 f3 e1 36 8d 	mov    $0xffffffff8d36e1f3,%rdi
   f:	be 90 04 00 00       	mov    $0x490,%esi
  14:	e8 d3 b2 47 fe       	call   0xfe47b2ec
  19:	2e 2e 2e 31 c0       	cs cs cs xor %eax,%eax
  1e:	49 8d 5c 24 08       	lea    0x8(%r12),%rbx
  23:	48 89 dd             	mov    %rbx,%rbp
  26:	48 c1 ed 03          	shr    $0x3,%rbp
* 2a:	42 80 7c 2d 00 00    	cmpb   $0x0,0x0(%rbp,%r13,1) <-- trapping instruction
  30:	74 08                	je     0x3a
  32:	48 89 df             	mov    %rbx,%rdi
  35:	e8 c2 68 db fe       	call   0xfedb68fc
  3a:	4c 8b 3b             	mov    (%rbx),%r15
  3d:	4c 89 fe             	mov    %r15,%rsi