general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 PID: 3610 Comm: syz-executor589 Not tainted 6.0.0-rc7-syzkaller-00180-g70575e77839f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:lmLogSync+0x227/0xb00 fs/jfs/jfs_logmgr.c:937 Code: b2 fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 27 57 da fe 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 0a 57 da fe 48 8b 3b e8 22 7a b2 RSP: 0018:ffffc900039cfae0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 43432418fa979a00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900039cfbe8 R08: ffffffff81b29a43 R09: ffffc900039cfa30 R10: fffff52000739f49 R11: 1ffff92000739f46 R12: dffffc0000000000 R13: ffff888077eb7000 R14: 0000000000000000 R15: ffff888012e3f838 FS: 000055555716d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc1c4c6f28 CR3: 000000001cd7c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_syncpt+0x79/0x90 fs/jfs/jfs_logmgr.c:1041 jfs_sync_fs+0x86/0xa0 fs/jfs/super.c:685 sync_filesystem+0xe8/0x220 fs/sync.c:56 generic_shutdown_super+0x6b/0x300 fs/super.c:474 kill_block_super+0x79/0xd0 fs/super.c:1427 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x4ce/0x560 fs/namespace.c:1186 task_work_run+0x146/0x1c0 kernel/task_work.c:177 ptrace_notify+0x29a/0x340 kernel/signal.c:2353 ptrace_report_syscall include/linux/ptrace.h:420 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline] syscall_exit_work+0x8c/0xe0 kernel/entry/common.c:249 syscall_exit_to_user_mode_prepare+0x63/0xc0 kernel/entry/common.c:276 __syscall_exit_to_user_mode_work kernel/entry/common.c:281 [inline] syscall_exit_to_user_mode+0xa/0x60 kernel/entry/common.c:294 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f78bc0b2907 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 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc1c4c7668 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f78bc0b2907 RDX: 00007ffc1c4c7729 RSI: 000000000000000a RDI: 00007ffc1c4c7720 RBP: 00007ffc1c4c7720 R08: 00000000ffffffff R09: 00007ffc1c4c7500 R10: 000055555716e653 R11: 0000000000000202 R12: 00007ffc1c4c8790 R13: 000055555716e5f0 R14: 00007ffc1c4c7690 R15: 0000000000000002 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:lmLogSync+0x227/0xb00 fs/jfs/jfs_logmgr.c:937 Code: b2 fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 27 57 da fe 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 0a 57 da fe 48 8b 3b e8 22 7a b2 RSP: 0018:ffffc900039cfae0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 43432418fa979a00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900039cfbe8 R08: ffffffff81b29a43 R09: ffffc900039cfa30 R10: fffff52000739f49 R11: 1ffff92000739f46 R12: dffffc0000000000 R13: ffff888077eb7000 R14: 0000000000000000 R15: ffff888012e3f838 FS: 000055555716d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc8cda3d98 CR3: 000000001cd7c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: b2 fe mov $0xfe,%dl 2: 49 8d 5f f0 lea -0x10(%r15),%rbx 6: 48 89 d8 mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 27 57 da fe callq 0xfeda5743 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 30 add $0x30,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 0a 57 da fe callq 0xfeda5743 39: 48 8b 3b mov (%rbx),%rdi 3c: e8 .byte 0xe8 3d: 22 7a b2 and -0x4e(%rdx),%bh