syzbot


general protection fault in proc_invalidate_siblings_dcache

Status: auto-closed as invalid on 2021/11/08 05:37
Reported-by: syzbot+56c8f1ff9d8233cb6532@syzkaller.appspotmail.com
First crash: 477d, last: 477d

Sample crash report:
general protection fault, probably for non-canonical address 0xe0e0dce0e0e0e0e1: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0x0707070707070708-0x070707070707070f]
CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.14.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:hlist_unhashed include/linux/list.h:808 [inline]
RIP: 0010:hlist_del_init_rcu include/linux/rculist.h:192 [inline]
RIP: 0010:proc_invalidate_siblings_dcache+0xca/0x610 fs/proc/inode.c:128
Code: 00 00 00 fc ff df 48 c1 e8 03 48 01 e8 48 89 44 24 10 e8 d9 be 86 ff 4c 89 ff e8 61 1a 3e 07 48 8d 7b 08 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 bd 04 00 00 4c 8b 63 08 4d 85 e4 74 5e e8 ae be
RSP: 0018:ffffc90000cd7760 EFLAGS: 00010207
RAX: 00e0e0e0e0e0e0e1 RBX: 0707070707070707 RCX: ffffffff815b9420
RDX: 1ffffffff1769162 RSI: 0000000000000004 RDI: 070707070707070f
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000003
R10: fffff5200019aede R11: 000000000000002a R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888000171c48 R15: ffffffff8bb48b00
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff01953760 CR3: 0000000029414000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 proc_sys_invalidate_dcache fs/proc/proc_sysctl.c:269 [inline]
 start_unregistering fs/proc/proc_sysctl.c:294 [inline]
 drop_sysctl_table+0x169/0x4e0 fs/proc/proc_sysctl.c:1643
 unregister_sysctl_table fs/proc/proc_sysctl.c:1685 [inline]
 unregister_sysctl_table+0xc2/0x190 fs/proc/proc_sysctl.c:1660
 neigh_sysctl_unregister+0x5b/0x80 net/core/neighbour.c:3719
 devinet_sysctl_unregister net/ipv4/devinet.c:2624 [inline]
 inetdev_destroy net/ipv4/devinet.c:324 [inline]
 inetdev_event+0xcfe/0x15d0 net/ipv4/devinet.c:1598
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123
 call_netdevice_notifiers_extack net/core/dev.c:2135 [inline]
 call_netdevice_notifiers net/core/dev.c:2149 [inline]
 unregister_netdevice_many+0x951/0x1790 net/core/dev.c:11093
 sit_exit_batch_net+0x530/0x750 net/ipv6/sit.c:1949
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:178
 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace e85f7b47135fffcb ]---
RIP: 0010:hlist_unhashed include/linux/list.h:808 [inline]
RIP: 0010:hlist_del_init_rcu include/linux/rculist.h:192 [inline]
RIP: 0010:proc_invalidate_siblings_dcache+0xca/0x610 fs/proc/inode.c:128
Code: 00 00 00 fc ff df 48 c1 e8 03 48 01 e8 48 89 44 24 10 e8 d9 be 86 ff 4c 89 ff e8 61 1a 3e 07 48 8d 7b 08 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 bd 04 00 00 4c 8b 63 08 4d 85 e4 74 5e e8 ae be
RSP: 0018:ffffc90000cd7760 EFLAGS: 00010207
RAX: 00e0e0e0e0e0e0e1 RBX: 0707070707070707 RCX: ffffffff815b9420
RDX: 1ffffffff1769162 RSI: 0000000000000004 RDI: 070707070707070f
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000003
R10: fffff5200019aede R11: 000000000000002a R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888000171c48 R15: ffffffff8bb48b00
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff01953760 CR3: 0000000029414000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-386 2021/08/10 05:37 upstream 9a73fa375d58 6972b106 .config log report info general protection fault in proc_invalidate_siblings_dcache
* Struck through repros no longer work on HEAD.