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: 5066 Comm: syz-executor334 Not tainted 6.2.0-rc4-syzkaller-00031-g6e50979a9c87 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x7e7/0xec0 fs/jfs/jfs_logmgr.c:1573 Code: ac fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d7 61 d5 fe 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 ba 61 d5 fe 48 8b 3b e8 b2 b6 ac RSP: 0018:ffffc90003d2fb20 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 26a64364b5795c00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003d2fc60 R08: ffffffff81b8dde3 R09: ffffc90003d2fa70 R10: fffff520007a5f51 R11: 1ffff920007a5f4e R12: 1ffff920007a5f70 R13: dffffc0000000000 R14: ffff888027139800 R15: ffff888148db5a38 FS: 0000555556775300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555677e628 CR3: 000000002c2de000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_umount+0x16b/0x3b0 fs/jfs/jfs_umount.c:58 jfs_put_super+0x86/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x310 fs/super.c:492 kill_block_super+0x79/0xd0 fs/super.c:1386 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1291 task_work_run+0x243/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe48486fe37 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:00007ffca04f38e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe48486fe37 RDX: 00007ffca04f39a9 RSI: 000000000000000a RDI: 00007ffca04f39a0 RBP: 00007ffca04f39a0 R08: 00000000ffffffff R09: 00007ffca04f3780 R10: 0000555556776653 R11: 0000000000000206 R12: 00007ffca04f4a10 R13: 00005555567765f0 R14: 00007ffca04f3910 R15: 0000000000000001 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x7e7/0xec0 fs/jfs/jfs_logmgr.c:1573 Code: ac fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d7 61 d5 fe 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 ba 61 d5 fe 48 8b 3b e8 b2 b6 ac RSP: 0018:ffffc90003d2fb20 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 26a64364b5795c00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003d2fc60 R08: ffffffff81b8dde3 R09: ffffc90003d2fa70 R10: fffff520007a5f51 R11: 1ffff920007a5f4e R12: 1ffff920007a5f70 R13: dffffc0000000000 R14: ffff888027139800 R15: ffff888148db5a38 FS: 0000555556775300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005582b9754008 CR3: 000000002c2de000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ac lods %ds:(%rsi),%al 1: fe 49 8d decb -0x73(%rcx) 4: 5f pop %rdi 5: f0 48 89 d8 lock mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 d7 61 d5 fe callq 0xfed561f3 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 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 ba 61 d5 fe callq 0xfed561f3 39: 48 8b 3b mov (%rbx),%rdi 3c: e8 .byte 0xe8 3d: b2 b6 mov $0xb6,%dl 3f: ac lods %ds:(%rsi),%al