general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 PID: 5074 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] RIP: 0010:jfs_flush_journal+0x95d/0xec0 fs/jfs/jfs_logmgr.c:1582 Code: 00 00 49 8d 5f d8 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d1 b9 d2 fe 4c 8b 33 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 b4 b9 d2 fe 49 8b 3e e8 bc 9a a7 RSP: 0018:ffffc9000458fb20 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffff88801e336c10 RCX: ffff888021f3da00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000458fc48 R08: ffffffff81c9d38a R09: 0000000000000000 R10: ffffc9000458fa70 R11: fffff520008b1f51 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000030 R15: ffff88801e336c38 FS: 000055555e63f480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f697f97b2b8 CR3: 0000000024360000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_umount+0x170/0x3a0 fs/jfs/jfs_umount.c:58 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 deactivate_locked_super+0xc4/0x130 fs/super.c:472 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:108 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0x168/0x360 kernel/entry/common.c:212 do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fd4d707f197 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:00007ffcad1ca428 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd4d707f197 RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffcad1ca4e0 RBP: 00007ffcad1ca4e0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcad1cb5a0 R13: 00007fd4d70c93b9 R14: 00000000000141b6 R15: 0000000000000005 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] RIP: 0010:jfs_flush_journal+0x95d/0xec0 fs/jfs/jfs_logmgr.c:1582 Code: 00 00 49 8d 5f d8 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d1 b9 d2 fe 4c 8b 33 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 b4 b9 d2 fe 49 8b 3e e8 bc 9a a7 RSP: 0018:ffffc9000458fb20 EFLAGS: 00010206 RAX: 0000000000000006 RBX: ffff88801e336c10 RCX: ffff888021f3da00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000458fc48 R08: ffffffff81c9d38a R09: 0000000000000000 R10: ffffc9000458fa70 R11: fffff520008b1f51 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000030 R15: ffff88801e336c38 FS: 000055555e63f480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbb642d66e4 CR3: 0000000024360000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 49 8d 5f d8 lea -0x28(%r15),%rbx 6: 48 89 d8 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 d1 b9 d2 fe call 0xfed2b9ed 1c: 4c 8b 33 mov (%rbx),%r14 1f: 49 83 c6 30 add $0x30,%r14 23: 4c 89 f0 mov %r14,%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: 4c 89 f7 mov %r14,%rdi 34: e8 b4 b9 d2 fe call 0xfed2b9ed 39: 49 8b 3e mov (%r14),%rdi 3c: e8 .byte 0xe8 3d: bc .byte 0xbc 3e: 9a (bad) 3f: a7 cmpsl %es:(%rdi),%ds:(%rsi)