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: 3552 Comm: syz-executor.4 Not tainted 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x80d/0xec0 fs/jfs/jfs_logmgr.c:1581 Code: c4 fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 61 34 e6 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 44 34 e6 fe 48 8b 3b e8 fc 00 c4 RSP: 0018:ffffc90002e6fbc0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 4cda69e3ddae4e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002e6fcf0 R08: ffffffff81a738a6 R09: ffffc90002e6fb28 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920005cdf84 R13: dffffc0000000000 R14: ffff88807c359000 R15: ffff888074351638 FS: 000055555703e480(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f00bc037000 CR3: 00000000436a6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_umount+0xf4/0x370 fs/jfs/jfs_umount.c:58 jfs_put_super+0x86/0x180 fs/jfs/super.c:194 generic_shutdown_super+0x136/0x2c0 fs/super.c:475 kill_block_super+0x7a/0xe0 fs/super.c:1405 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f04eda9de57 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc8bd23258 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f04eda9de57 RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc8bd23310 RBP: 00007ffc8bd23310 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc8bd243d0 R13: 00007f04edae73b9 R14: 0000000000072f0f R15: 0000000000000002 Modules linked in: ---[ end trace 07af55aa844ae7cb ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x80d/0xec0 fs/jfs/jfs_logmgr.c:1581 Code: c4 fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 61 34 e6 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 44 34 e6 fe 48 8b 3b e8 fc 00 c4 RSP: 0018:ffffc90002e6fbc0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 4cda69e3ddae4e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002e6fcf0 R08: ffffffff81a738a6 R09: ffffc90002e6fb28 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920005cdf84 R13: dffffc0000000000 R14: ffff88807c359000 R15: ffff888074351638 FS: 000055555703e480(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c01095c9ae CR3: 00000000436a6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: fe 49 8d decb -0x73(%rcx) 3: 5f pop %rdi 4: f0 48 89 d8 lock mov %rbx,%rax 8: 48 c1 e8 03 shr $0x3,%rax c: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 11: 74 08 je 0x1b 13: 48 89 df mov %rbx,%rdi 16: e8 61 34 e6 fe call 0xfee6347c 1b: 48 8b 1b mov (%rbx),%rbx 1e: 48 83 c3 30 add $0x30,%rbx 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 44 34 e6 fe call 0xfee6347c 38: 48 8b 3b mov (%rbx),%rdi 3b: e8 .byte 0xe8 3c: fc cld 3d: 00 c4 add %al,%ah