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: 6784 Comm: syz.0.882 Not tainted 5.15.161-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 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: c2 fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 11 c5 e4 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 f4 c4 e4 fe 48 8b 3b e8 cc 8f c2 RSP: 0018:ffffc900035a79e0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 59ac50e0882dcc00 RDX: ffffc900055c1000 RSI: 000000000000ba6b RDI: 000000000000ba6c RBP: ffffc900035a7b10 R08: ffffffff81a7f176 R09: ffffc900035a7948 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920006b4f48 R13: dffffc0000000000 R14: ffff888021559800 R15: ffff88801d0a8238 FS: 00007f44a7ea96c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f51aff8 CR3: 0000000075621000 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_fill_super+0x938/0xc70 fs/jfs/super.c:605 mount_bdev+0x2c9/0x3f0 fs/super.c:1387 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f44a942a22a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f44a7ea8e78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f44a7ea8f00 RCX: 00007f44a942a22a RDX: 00000000200002c0 RSI: 0000000020000180 RDI: 00007f44a7ea8ec0 RBP: 00000000200002c0 R08: 00007f44a7ea8f00 R09: 000000000300401a R10: 000000000300401a R11: 0000000000000206 R12: 0000000020000180 R13: 00007f44a7ea8ec0 R14: 00000000000060ed R15: 0000000020000100 Modules linked in: ---[ end trace 8b10d1e89bc85561 ]--- 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: c2 fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 11 c5 e4 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 f4 c4 e4 fe 48 8b 3b e8 cc 8f c2 RSP: 0018:ffffc900035a79e0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 59ac50e0882dcc00 RDX: ffffc900055c1000 RSI: 000000000000ba6b RDI: 000000000000ba6c RBP: ffffc900035a7b10 R08: ffffffff81a7f176 R09: ffffc900035a7948 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920006b4f48 R13: dffffc0000000000 R14: ffff888021559800 R15: ffff88801d0a8238 FS: 00007f44a7ea96c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7f3519ab8 CR3: 0000000075621000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c2 fe 49 ret $0x49fe 3: 8d 5f f0 lea -0x10(%rdi),%ebx 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 11 c5 e4 fe call 0xfee4c52d 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 f4 c4 e4 fe call 0xfee4c52d 39: 48 8b 3b mov (%rbx),%rdi 3c: e8 .byte 0xe8 3d: cc int3 3e: 8f c2 pop %rdx