syzbot


general protection fault in tcf_action_destroy (3)

Status: closed as invalid on 2021/12/14 20:22
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 741d, last: 741d

Cause bisection: failed (bisect log)

Fix bisection: failed (bisect log)
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 general protection fault in tcf_action_destroy C done 15 1157d 1178d 1/1 fixed on 2019/12/11 14:03
upstream general protection fault in tcf_action_destroy (2) C done done 29 784d 997d 17/24 fixed on 2020/11/16 12:12
upstream general protection fault in tcf_action_destroy 128 1161d 1179d 14/24 fixed on 2019/10/15 23:40
linux-4.19 general protection fault in tcf_action_destroy (2) 1 1000d 1000d 0/1 auto-closed as invalid on 2020/07/06 08:55

Sample crash report:
general protection fault, probably for non-canonical address 0xfe03fc3c1e04003c: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0xf02001e0f02001e0-0xf02001e0f02001e7]
CPU: 1 PID: 47 Comm: kworker/u4:3 Not tainted 5.10.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: tc_filter_workqueue tcindex_destroy_rexts_work
RIP: 0010:tcf_action_destroy+0xbc/0x1b0 net/sched/act_api.c:714
Code: 83 c4 01 bf 20 00 00 00 48 83 c3 08 44 89 e6 e8 1a 9b 5d fa 41 83 fc 20 0f 84 ac 00 00 00 e8 bb a2 5d fa 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 ac 00 00 00 48 8b 2b 48 85 ed 0f 84 89 00 00
RSP: 0018:ffffc90000f27c88 EFLAGS: 00010a06
RAX: 1e04003c1e04003c RBX: f02001e0f02001e0 RCX: 0000000000000000
RDX: ffff888011298080 RSI: ffffffff87128ea5 RDI: f02001e0f02001e0
RBP: ffff888038c00008 R08: 0000000000000000 R09: ffffffff8c92a8e7
R10: fffffbfff192551c R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 0000000019a1f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tcf_exts_destroy+0x42/0xc0 net/sched/cls_api.c:3040
 __tcindex_destroy_rexts+0x16/0x210 net/sched/cls_tcindex.c:162
 tcindex_destroy_rexts_work+0x17/0x20 net/sched/cls_tcindex.c:175
 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2020/11/22 13:17 upstream a349e4c65960 0d27f508 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/11/22 12:43 upstream a349e4c65960 0d27f508 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/11/22 08:49 upstream a349e4c65960 0d27f508 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/11/22 08:43 upstream a349e4c65960 0d27f508 .config log report info
* Struck through repros no longer work on HEAD.