kasan: CONFIG_KASAN_INLINE enabled NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 7959 Comm: syz-executor106 Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 task: ffff8880b48f8640 task.stack: ffff8880963b0000 RIP: 0010:lock_accessed kernel/locking/lockdep.c:979 [inline] RIP: 0010:__bfs.part.0+0x20e/0x470 kernel/locking/lockdep.c:1045 RSP: 0018:ffff8880963b7370 EFLAGS: 00010007 RAX: 0000000001d0dd96 RBX: ffffffff8bc82250 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000010 RBP: ffff8880963b7428 R08: 0000000000000000 R09: 0000000000001c0e R10: 0000000000000002 R11: 0000000000000001 R12: ffffffff8140f610 R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000555557184300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000144 CR3: 00000000a92a6000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __bfs kernel/locking/lockdep.c:1424 [inline] __bfs_backwards kernel/locking/lockdep.c:1082 [inline] find_usage_backwards kernel/locking/lockdep.c:1424 [inline] check_usage_backwards+0x167/0x2c0 kernel/locking/lockdep.c:2713 mark_lock_irq kernel/locking/lockdep.c:2804 [inline] mark_lock+0x3c7/0x1050 kernel/locking/lockdep.c:3194 mark_irqflags kernel/locking/lockdep.c:3078 [inline] __lock_acquire+0x594/0x3f20 kernel/locking/lockdep.c:3448 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 nilfs_bmap_lookup_at_level+0x6b/0x380 fs/nilfs2/bmap.c:77 nilfs_bmap_lookup fs/nilfs2/bmap.h:179 [inline] nilfs_mdt_submit_block.constprop.0+0x152/0x970 fs/nilfs2/mdt.c:151 nilfs_mdt_read_block+0x7c/0x320 fs/nilfs2/mdt.c:184 nilfs_mdt_get_block+0xc7/0xb90 fs/nilfs2/mdt.c:259 nilfs_palloc_get_block+0xb2/0x250 fs/nilfs2/alloc.c:225 nilfs_palloc_get_entry_block+0x17d/0x230 fs/nilfs2/alloc.c:327 nilfs_ifile_get_inode_block+0xb4/0x150 fs/nilfs2/ifile.c:152 __nilfs_read_inode fs/nilfs2/inode.c:492 [inline] nilfs_iget+0x1c2/0x810 fs/nilfs2/inode.c:601 nilfs_get_root_dentry+0x24/0x1f0 fs/nilfs2/super.c:918 nilfs_fill_super fs/nilfs2/super.c:1092 [inline] nilfs_mount+0x984/0xd00 fs/nilfs2/super.c:1331 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f5b3cecd55a RSP: 002b:00007ffc1e9af8e8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f5b3cecd55a RDX: 0000000020000140 RSI: 0000000020000100 RDI: 00007ffc1e9af900 RBP: 00007ffc1e9af900 R08: 00007ffc1e9af940 R09: 00005555571842c0 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 R13: 00007ffc1e9af940 R14: 000000000000003a R15: 0000000020000770 Code: 78 01 00 00 4d 8b 36 4c 39 f3 74 78 49 8d 7e 10 4c 89 f0 4c 8b 0d a3 69 a7 0a 48 89 fa 48 2d 60 9a c8 8b 48 c1 ea 03 48 c1 f8 06 <42> 80 3c 3a 00 0f 85 28 01 00 00 49 8b 4e 10 4c 8d 41 2c 4c 89 RIP: lock_accessed kernel/locking/lockdep.c:979 [inline] RSP: ffff8880963b7370 RIP: __bfs.part.0+0x20e/0x470 kernel/locking/lockdep.c:1045 RSP: ffff8880963b7370 ---[ end trace ed54b10684919e04 ]--- ---------------- Code disassembly (best guess): 0: 78 01 js 0x3 2: 00 00 add %al,(%rax) 4: 4d 8b 36 mov (%r14),%r14 7: 4c 39 f3 cmp %r14,%rbx a: 74 78 je 0x84 c: 49 8d 7e 10 lea 0x10(%r14),%rdi 10: 4c 89 f0 mov %r14,%rax 13: 4c 8b 0d a3 69 a7 0a mov 0xaa769a3(%rip),%r9 # 0xaa769bd 1a: 48 89 fa mov %rdi,%rdx 1d: 48 2d 60 9a c8 8b sub $0xffffffff8bc89a60,%rax 23: 48 c1 ea 03 shr $0x3,%rdx 27: 48 c1 f8 06 sar $0x6,%rax * 2b: 42 80 3c 3a 00 cmpb $0x0,(%rdx,%r15,1) <-- trapping instruction 30: 0f 85 28 01 00 00 jne 0x15e 36: 49 8b 4e 10 mov 0x10(%r14),%rcx 3a: 4c 8d 41 2c lea 0x2c(%rcx),%r8 3e: 4c rex.WR 3f: 89 .byte 0x89