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 10/25/2025 RIP: 0010:folio_flags include/linux/page-flags.h:360 [inline] RIP: 0010:folio_trylock include/linux/pagemap.h:1122 [inline] RIP: 0010:folio_lock include/linux/pagemap.h:1158 [inline] RIP: 0010:release_metapage+0x9e/0xab0 fs/jfs/jfs_metapage.c:870 Code: 04 00 00 e8 f4 b2 7f fe 48 c7 c7 33 2e e3 8c be 85 04 00 00 e8 73 d7 51 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 02 ea e1 fe 4c 8b 3b 4c 89 fe RSP: 0018:ffffc9000396f6d8 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000046 RDX: 0000000000000000 RSI: ffffffff8cfdeef6 RDI: ffffffff8b3f57e0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100b6c8012 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88805b640068 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888126def000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f326ff29000 CR3: 00000000331f0000 CR4: 00000000003526f0 Call Trace: xtTruncate+0xe84/0x2e70 fs/jfs/jfs_xtree.c:-1 jfs_free_zero_link+0x33a/0x4a0 fs/jfs/namei.c:759 jfs_evict_inode+0x363/0x440 fs/jfs/inode.c:159 evict+0x5f4/0xae0 fs/inode.c:837 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x3f1/0xa10 fs/jfs/jfs_txnmgr.c:2734 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 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:1122 [inline] RIP: 0010:folio_lock include/linux/pagemap.h:1158 [inline] RIP: 0010:release_metapage+0x9e/0xab0 fs/jfs/jfs_metapage.c:870 Code: 04 00 00 e8 f4 b2 7f fe 48 c7 c7 33 2e e3 8c be 85 04 00 00 e8 73 d7 51 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 02 ea e1 fe 4c 8b 3b 4c 89 fe RSP: 0018:ffffc9000396f6d8 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000046 RDX: 0000000000000000 RSI: ffffffff8cfdeef6 RDI: ffffffff8b3f57e0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100b6c8012 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88805b640068 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f112ff4c368 CR3: 000000001fb3a000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: e8 f4 b2 7f fe call 0xfe7fb2fb 7: 48 c7 c7 33 2e e3 8c mov $0xffffffff8ce32e33,%rdi e: be 85 04 00 00 mov $0x485,%esi 13: e8 73 d7 51 fe call 0xfe51d78b 18: 2e 2e 2e 31 c0 cs cs cs xor %eax,%eax 1d: 49 8d 5c 24 08 lea 0x8(%r12),%rbx 22: 48 89 dd mov %rbx,%rbp 25: 48 c1 ed 03 shr $0x3,%rbp * 29: 42 80 7c 2d 00 00 cmpb $0x0,0x0(%rbp,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 02 ea e1 fe call 0xfee1ea3b 39: 4c 8b 3b mov (%rbx),%r15 3c: 4c 89 fe mov %r15,%rsi