bn = 72c, index = 96 bn = 0, index = 0 bn = 72c, index = 96 bn = 0, index = 0 bn = 72c, index = 96 bn = 0, index = 0 bn = 0, index = 0 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 20315 Comm: syz.8.2867 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:metapage_write_folio+0x9d/0xe10 fs/jfs/jfs_metapage.c:428 Code: 48 8d 7b 18 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 0b 0c 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 18 48 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 df 0b 00 00 48 8b 6d 00 48 8d 45 28 48 89 c2 48 RSP: 0018:ffffc9000d2df6a0 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: ffffea00026fb0c0 RCX: ffffc9000604a000 RDX: 0000000000000000 RSI: ffffffff83a389e3 RDI: ffffea00026fb0d8 RBP: 0000000000000000 R08: 0000000000000001 R09: fffff940004df61e R10: ffffea00026fb0f7 R11: 0000000000000000 R12: ffffea00026fb0f4 R13: ffffc9000d2df7c8 R14: 0000000000000081 R15: 0000000000000001 FS: 00007f8a011856c0(0000) GS:ffff888124439000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f61a79ff000 CR3: 0000000032b49000 CR4: 0000000000350ef0 Call Trace: metapage_write_one+0x300/0x4a0 fs/jfs/jfs_metapage.c:818 release_metapage+0x6cd/0x990 fs/jfs/jfs_metapage.c:884 dtSearch+0x1a5a/0x21b0 fs/jfs/jfs_dtree.c:793 jfs_symlink+0xb31/0x10f0 fs/jfs/namei.c:1018 vfs_symlink fs/namei.c:5621 [inline] vfs_symlink+0x178/0x4d0 fs/namei.c:5600 filename_symlinkat+0x2a6/0x560 fs/namei.c:5646 __do_sys_symlink fs/namei.c:5673 [inline] __se_sys_symlink fs/namei.c:5669 [inline] __x64_sys_symlink+0x79/0xb0 fs/namei.c:5669 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8a0039c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8a01185028 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 00007f8a00615fa0 RCX: 00007f8a0039c819 RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000001640 RBP: 00007f8a00432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8a00616038 R14: 00007f8a00615fa0 R15: 00007fff20e4f898 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:metapage_write_folio+0x9d/0xe10 fs/jfs/jfs_metapage.c:428 Code: 48 8d 7b 18 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 0b 0c 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 18 48 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 df 0b 00 00 48 8b 6d 00 48 8d 45 28 48 89 c2 48 RSP: 0018:ffffc9000d2df6a0 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: ffffea00026fb0c0 RCX: ffffc9000604a000 RDX: 0000000000000000 RSI: ffffffff83a389e3 RDI: ffffea00026fb0d8 RBP: 0000000000000000 R08: 0000000000000001 R09: fffff940004df61e R10: ffffea00026fb0f7 R11: 0000000000000000 R12: ffffea00026fb0f4 R13: ffffc9000d2df7c8 R14: 0000000000000081 R15: 0000000000000001 FS: 00007f8a011856c0(0000) GS:ffff888124339000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4850176000 CR3: 0000000032b49000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 48 8d 7b 18 lea 0x18(%rbx),%rdi 4: 48 89 f8 mov %rdi,%rax 7: 48 c1 e8 03 shr $0x3,%rax b: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) f: 0f 85 0b 0c 00 00 jne 0xc20 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 8b 6b 18 mov 0x18(%rbx),%rbp 23: 48 89 ea mov %rbp,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 df 0b 00 00 jne 0xc13 34: 48 8b 6d 00 mov 0x0(%rbp),%rbp 38: 48 8d 45 28 lea 0x28(%rbp),%rax 3c: 48 89 c2 mov %rax,%rdx 3f: 48 rex.W