syzbot


BUG: unable to handle kernel paging request in batadv_nc_purge_paths

Status: auto-closed as invalid on 2019/10/25 08:48
Subsystems: batman
[Documentation on labels]
Reported-by: syzbot+b1b8f4196e00e7fcfb2e@syzkaller.appspotmail.com
First crash: 1788d, last: 1788d

Sample crash report:
BUG: unable to handle page fault for address: ffff88808ba40480
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD b401067 P4D b401067 PUD 21ffff067 PMD 9645e063 PTE ffffffff8b1de200
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9967 Comm: kworker/u4:7 Not tainted 5.2.0-rc3+ #32
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:batadv_nc_purge_paths+0xea/0x370 net/batman-adv/network-coding.c:442
Code: 48 8b 45 c8 48 6b db 38 48 03 58 08 48 89 df 48 89 5d b8 e8 88 85 1c 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 0f 85 e0 01 00 00 <4d> 8b 24 24 eb 30 e8 8b d4 6d fa e8 86 2e 86 fe 31 ff 41 89 c7 89
RSP: 0018:ffff888066537c60 EFLAGS: 00010246
RAX: 1ffff11011748090 RBX: ffff88809381dc40 RCX: ffffffff81585bea
RDX: 1ffff11012703b8a RSI: 0000000000000004 RDI: ffff888066537bc8
RBP: ffff888066537cd0 R08: 1ffff1100cca6f79 R09: ffffed100cca6f7a
R10: ffffed100cca6f79 R11: 0000000000000003 R12: ffff88808ba40480
R13: dffffc0000000000 R14: ffffffff8702de10 R15: ffff8880a13c43c0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88808ba40480 CR3: 000000006836a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 batadv_nc_worker+0x29c/0x760 net/batman-adv/network-coding.c:719
 process_one_work+0x989/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: ffff88808ba40480
---[ end trace 12a529f611a917cc ]---
RIP: 0010:batadv_nc_purge_paths+0xea/0x370 net/batman-adv/network-coding.c:442
Code: 48 8b 45 c8 48 6b db 38 48 03 58 08 48 89 df 48 89 5d b8 e8 88 85 1c 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 0f 85 e0 01 00 00 <4d> 8b 24 24 eb 30 e8 8b d4 6d fa e8 86 2e 86 fe 31 ff 41 89 c7 89
RSP: 0018:ffff888066537c60 EFLAGS: 00010246
RAX: 1ffff11011748090 RBX: ffff88809381dc40 RCX: ffffffff81585bea
RDX: 1ffff11012703b8a RSI: 0000000000000004 RDI: ffff888066537bc8
RBP: ffff888066537cd0 R08: 1ffff1100cca6f79 R09: ffffed100cca6f7a
R10: ffffed100cca6f79 R11: 0000000000000003 R12: ffff88808ba40480
R13: dffffc0000000000 R14: ffffffff8702de10 R15: ffff8880a13c43c0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88808ba40480 CR3: 000000006836a000 CR4: 00000000001406f0
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
2019/06/15 08:04 net-next-old 877cd9ffbc9c 442206d7 .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.