syzbot


general protection fault in list_lru_del

Status: auto-closed as invalid on 2020/12/02 22:17
Reported-by: syzbot+9c4a4351802de72fd74b@syzkaller.appspotmail.com
First crash: 1582d, last: 1582d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in list_lru_del mm 1 1734d 1730d 0/28 auto-closed as invalid on 2020/07/04 08:24
linux-4.19 general protection fault in list_lru_del (2) 1 1449d 1449d 0/1 auto-closed as invalid on 2021/04/15 03:57

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8509 Comm: syz-executor.4 Not tainted 4.19.136-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0x81/0xef lib/list_debug.c:51
Code: 0f 84 df 00 00 00 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 97 00 00 00 49 8d 7d
RSP: 0018:ffff8882112a7c88 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff888000805358 RCX: ffffffff815255bb
RDX: 0000000000000000 RSI: ffffffff81912ecf RDI: ffff888000805360
RBP: ffff888000805358 R08: 0000000000000001 R09: ffffed1015281eb8
R10: ffff8880a940f5c3 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888000805360 R15: ffff8880008051e8
FS:  0000000001a01940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30c2f000 CR3: 00000000a03b7000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del_init include/linux/list.h:159 [inline]
 list_lru_del+0x11b/0x570 mm/list_lru.c:156
 inode_lru_list_del fs/inode.c:434 [inline]
 iput_final fs/inode.c:1552 [inline]
 iput+0x4c0/0x860 fs/inode.c:1581
 dentry_unlink_inode+0x265/0x320 fs/dcache.c:374
 d_delete+0x210/0x280 fs/dcache.c:2370
 __debugfs_remove.part.0+0xb9/0x1b0 fs/debugfs/inode.c:656
 __debugfs_remove include/linux/dcache.h:322 [inline]
 debugfs_remove_recursive fs/debugfs/inode.c:763 [inline]
 debugfs_remove_recursive+0x37a/0x4c0 fs/debugfs/inode.c:709
 kvm_vcpu_release+0x58/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2638
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4167f1
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fff2097a800 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00000000004167f1
RDX: 0000000000000000 RSI: ffffffff873cf158 RDI: 0000000000000005
RBP: 0000000000000001 R08: ffffffff81020e9b R09: 0000000068e3f068
R10: 00007fff2097a8f0 R11: 0000000000000293 R12: 000000000078c900
R13: 000000000078c900 R14: ffffffffffffffff R15: 000000000078c04c
Modules linked in:
---[ end trace be083b257a7244d5 ]---
RIP: 0010:__list_del_entry_valid+0x81/0xef lib/list_debug.c:51
Code: 0f 84 df 00 00 00 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 97 00 00 00 49 8d 7d
RSP: 0018:ffff8882112a7c88 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff888000805358 RCX: ffffffff815255bb
RDX: 0000000000000000 RSI: ffffffff81912ecf RDI: ffff888000805360
RBP: ffff888000805358 R08: 0000000000000001 R09: ffffed1015281eb8
R10: ffff8880a940f5c3 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888000805360 R15: ffff8880008051e8
FS:  0000000001a01940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30c2f000 CR3: 00000000a03b7000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/08/04 22:16 linux-4.19.y 13af6c74b14a 02034dac .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.