general protection fault, probably for non-canonical address 0xdffffc000000003d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000001e8-0x00000000000001ef] CPU: 1 PID: 9988 Comm: segctord Not tainted 6.4.0-rc2-syzkaller-00330-g0dd2a6fb1e34 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 RIP: 0010:__lock_acquire+0xdce/0x5df0 kernel/locking/lockdep.c:4942 Code: 00 00 3b 05 04 82 59 0f 0f 87 42 0a 00 00 41 be 01 00 00 00 e9 83 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 19 32 00 00 48 81 3b 20 08 16 90 0f 84 06 f3 ff RSP: 0018:ffffc900055ef618 EFLAGS: 00010012 RAX: dffffc0000000000 RBX: 00000000000001e8 RCX: 0000000000000000 RDX: 000000000000003d RSI: 0000000000000000 RDI: 00000000000001e8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880213d8000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e85e000 CR3: 000000001e6d1000 CR4: 0000000000350ee0 Call Trace: lock_acquire kernel/locking/lockdep.c:5691 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5656 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] folio_create_empty_buffers+0xb0/0x470 fs/buffer.c:1615 nilfs_lookup_dirty_data_buffers+0x580/0x6f0 fs/nilfs2/segment.c:730 nilfs_segctor_scan_file+0x1b1/0x6f0 fs/nilfs2/segment.c:1075 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1197 [inline] nilfs_segctor_collect fs/nilfs2/segment.c:1524 [inline] nilfs_segctor_do_construct+0x267f/0x7200 fs/nilfs2/segment.c:2070 nilfs_segctor_construct+0x8e3/0xb30 fs/nilfs2/segment.c:2404 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2512 [inline] nilfs_segctor_thread+0x3c7/0xf30 fs/nilfs2/segment.c:2595 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0xdce/0x5df0 kernel/locking/lockdep.c:4942 Code: 00 00 3b 05 04 82 59 0f 0f 87 42 0a 00 00 41 be 01 00 00 00 e9 83 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 19 32 00 00 48 81 3b 20 08 16 90 0f 84 06 f3 ff RSP: 0018:ffffc900055ef618 EFLAGS: 00010012 RAX: dffffc0000000000 RBX: 00000000000001e8 RCX: 0000000000000000 RDX: 000000000000003d RSI: 0000000000000000 RDI: 00000000000001e8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880213d8000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e85e000 CR3: 000000001e6d1000 CR4: 0000000000350ee0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 3b 05 04 82 59 0f cmp 0xf598204(%rip),%eax # 0xf59820c 8: 0f 87 42 0a 00 00 ja 0xa50 e: 41 be 01 00 00 00 mov $0x1,%r14d 14: e9 83 00 00 00 jmpq 0x9c 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 19 32 00 00 jne 0x324d 34: 48 81 3b 20 08 16 90 cmpq $0xffffffff90160820,(%rbx) 3b: 0f .byte 0xf 3c: 84 06 test %al,(%rsi) 3e: f3 repz 3f: ff .byte 0xff