Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 UID: 0 PID: 5823 Comm: syz-executor139 Not tainted 6.16.0-rc3-syzkaller-00042-g78f4e737a53e #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+0x1f1/0x9d0 fs/jfs/jfs_logmgr.c:937 Code: 43 82 fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 9d 9b e3 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 81 9b e3 fe 49 8b 3f e8 09 09 b9 fe RSP: 0018:ffffc9000407fa80 EFLAGS: 00010206 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88802ccc3c00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000407fb88 R08: ffffc9000407f9df R09: 0000000000000000 R10: ffffc9000407f868 R11: fffff5200080ff3c R12: ffff888030a10800 R13: dffffc0000000000 R14: ffff8880313d9838 R15: 0000000000000030 FS: 000055555acdb380(0000) GS:ffff888125c83000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6185150000 CR3: 00000000772ae000 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 jfs_sync_fs+0x87/0xa0 fs/jfs/super.c:650 sync_filesystem+0xeb/0x230 fs/sync.c:56 generic_shutdown_super+0x6f/0x2c0 fs/super.c:622 kill_block_super+0x44/0x90 fs/super.c:1755 deactivate_locked_super+0xbc/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417 task_work_run+0x1d1/0x260 kernel/task_work.c:227 ptrace_notify+0x281/0x2c0 kernel/signal.c:2520 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc6/0x1d0 kernel/entry/common.c:173 syscall_exit_to_user_mode_work include/linux/entry-common.h:412 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2ad/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3bf03114f7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc7101e0c8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00000000000154c6 RCX: 00007f3bf03114f7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc7101e180 RBP: 00007ffc7101e180 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffc7101f1f0 R13: 000055555acdc6c0 R14: 0000000000000001 R15: 431bde82d7b634db Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] RIP: 0010:lmLogSync+0x1f1/0x9d0 fs/jfs/jfs_logmgr.c:937 Code: 43 82 fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 9d 9b e3 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 81 9b e3 fe 49 8b 3f e8 09 09 b9 fe RSP: 0018:ffffc9000407fa80 EFLAGS: 00010206 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88802ccc3c00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000407fb88 R08: ffffc9000407f9df R09: 0000000000000000 R10: ffffc9000407f868 R11: fffff5200080ff3c R12: ffff888030a10800 R13: dffffc0000000000 R14: ffff8880313d9838 R15: 0000000000000030 FS: 000055555acdb380(0000) GS:ffff888125c83000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc0d71cb58 CR3: 00000000772ae000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 43 82 rex.XB (bad) 2: fe 4d 8d decb -0x73(%rbp) 5: 7e d8 jle 0xffffffdf 7: 4c 89 f8 mov %r15,%rax a: 48 c1 e8 03 shr $0x3,%rax e: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 12: 74 08 je 0x1c 14: 4c 89 ff mov %r15,%rdi 17: e8 9d 9b e3 fe call 0xfee39bb9 1c: 4d 8b 3f mov (%r15),%r15 1f: 49 83 c7 30 add $0x30,%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ff mov %r15,%rdi 33: e8 81 9b e3 fe call 0xfee39bb9 38: 49 8b 3f mov (%r15),%rdi 3b: e8 09 09 b9 fe call 0xfeb90949