general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 PID: 3557 Comm: syz-executor.0 Not tainted 6.1.87-syzkaller #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:208 [inline] RIP: 0010:jfs_flush_journal+0x80e/0xec0 fs/jfs/jfs_logmgr.c:1573 Code: ad fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 b0 db d8 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 93 db d8 fe 48 8b 3b e8 6b d6 ad RSP: 0018:ffffc90003b0fb20 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 1a93c8de1aff6400 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003b0fc58 R08: ffffffff81b6fec6 R09: ffffc90003b0fa70 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000761f70 R13: dffffc0000000000 R14: ffff888076d6d800 R15: ffff888073c76638 FS: 00005555569c5480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0031a20a0 CR3: 0000000060fb6000 CR4: 00000000003506f0 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+0x130/0x340 fs/super.c:501 kill_block_super+0x7a/0xe0 fs/super.c:1459 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5031e7f1d7 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:00007ffed67041f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f5031e7f1d7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffed67042b0 RBP: 00007ffed67042b0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffed6705370 R13: 00007f5031ec93b9 R14: 000000000000f151 R15: 0000000000000015 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x80e/0xec0 fs/jfs/jfs_logmgr.c:1573 Code: ad fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 b0 db d8 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 93 db d8 fe 48 8b 3b e8 6b d6 ad RSP: 0018:ffffc90003b0fb20 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 1a93c8de1aff6400 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003b0fc58 R08: ffffffff81b6fec6 R09: ffffc90003b0fa70 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000761f70 R13: dffffc0000000000 R14: ffff888076d6d800 R15: ffff888073c76638 FS: 00005555569c5480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560412a04cd8 CR3: 0000000060fb6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ad lods %ds:(%rsi),%eax 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 b0 db d8 fe call 0xfed8dbcc 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 93 db d8 fe call 0xfed8dbcc 39: 48 8b 3b mov (%rbx),%rdi 3c: e8 .byte 0xe8 3d: 6b d6 ad imul $0xffffffad,%esi,%edx