Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 UID: 0 PID: 112 Comm: jfsCommit Not tainted 6.16.0-rc3-syzkaller-00329-gdfba48a70cb6 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] RIP: 0010:lmLogSync+0xfb/0x9d0 fs/jfs/jfs_logmgr.c:935 Code: c7 7e fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 c3 59 e2 fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 a7 59 e2 fe 49 8b 3f e8 5f 93 b5 fe RSP: 0018:ffffc90002d67b00 EFLAGS: 00010206 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff88801d705a00 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90002d67c08 R08: 0000000000000003 R09: 0000000000000000 R10: ffffc90002d67b60 R11: fffff520005acf70 R12: ffff88802ab53000 R13: dffffc0000000000 R14: ffff88802ed43238 R15: 0000000000000030 FS: 0000000000000000(0000) GS:ffff888126751000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fa6a8bcbe0 CR3: 000000007ee02000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_syncpt+0x7b/0x90 fs/jfs/jfs_logmgr.c:1041 txEnd+0x2e5/0x520 fs/jfs/jfs_txnmgr.c:549 txLazyCommit fs/jfs/jfs_txnmgr.c:2684 [inline] jfs_lazycommit+0x5ba/0xa90 fs/jfs/jfs_txnmgr.c:2733 kthread+0x711/0x890 kernel/kthread.c:464 ret_from_fork+0x3f5/0x760 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] RIP: 0010:lmLogSync+0xfb/0x9d0 fs/jfs/jfs_logmgr.c:935 Code: c7 7e fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 c3 59 e2 fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 a7 59 e2 fe 49 8b 3f e8 5f 93 b5 fe RSP: 0018:ffffc90002d67b00 EFLAGS: 00010206 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff88801d705a00 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90002d67c08 R08: 0000000000000003 R09: 0000000000000000 R10: ffffc90002d67b60 R11: fffff520005acf70 R12: ffff88802ab53000 R13: dffffc0000000000 R14: ffff88802ed43238 R15: 0000000000000030 FS: 0000000000000000(0000) GS:ffff888126651000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd8e2ca408 CR3: 0000000077f86000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 7e fe jle 0x0 2: 4d 8d 7e d8 lea -0x28(%r14),%r15 6: 4c 89 f8 mov %r15,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 11: 74 08 je 0x1b 13: 4c 89 ff mov %r15,%rdi 16: e8 c3 59 e2 fe call 0xfee259de 1b: 4d 8b 3f mov (%r15),%r15 1e: 49 83 c7 30 add $0x30,%r15 22: 4c 89 f8 mov %r15,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2d: 74 08 je 0x37 2f: 4c 89 ff mov %r15,%rdi 32: e8 a7 59 e2 fe call 0xfee259de 37: 49 8b 3f mov (%r15),%rdi 3a: e8 5f 93 b5 fe call 0xfeb5939e