syzbot


WARNING in ieee80211_ibss_csa_beacon

Status: upstream: reported C repro on 2020/11/08 18:28
Reported-by: syzbot+80e54ae109d8e7c3d947@syzkaller.appspotmail.com
First crash: 644d, last: 28d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_ibss_csa_beacon C error 3664 8h23m 675d 0/23 upstream: reported C repro on 2020/10/08 07:40
linux-4.19 WARNING in ieee80211_ibss_csa_beacon syz error 635 8h48m 630d 0/1 upstream: reported syz repro on 2020/11/22 05:50

Sample crash report:
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
------------[ cut here ]------------
WARNING: CPU: 0 PID: 715 at net/mac80211/ibss.c:506 ieee80211_ibss_csa_beacon+0x523/0x670 net/mac80211/ibss.c:506
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 715 Comm: kworker/u4:3 Not tainted 4.14.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy3 ieee80211_csa_finalize_work
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:ieee80211_ibss_csa_beacon+0x523/0x670 net/mac80211/ibss.c:506
RSP: 0018:ffff8880b4097ca0 EFLAGS: 00010297
RAX: ffff8880b4044440 RBX: ffff888094155b40 RCX: 1ffff110168089b1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880b4044cc4
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888094156630 R14: ffff888094bb9160 R15: ffff888094156068
 ieee80211_set_after_csa_beacon net/mac80211/cfg.c:2909 [inline]
 __ieee80211_csa_finalize+0x677/0xca0 net/mac80211/cfg.c:2965
 ieee80211_csa_finalize net/mac80211/cfg.c:2988 [inline]
 ieee80211_csa_finalize_work+0x105/0x130 net/mac80211/cfg.c:3013
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2022/07/17 23:37 linux-4.14.y 424a46ea058e cba33199 .config log report syz C
ci2-linux-4-14 2022/06/17 23:04 linux-4.14.y 84bae26850e3 cba33199 .config log report syz C
ci2-linux-4-14 2022/05/18 20:56 linux-4.14.y dffb5c6ff09c cba33199 .config log report syz C
ci2-linux-4-14 2022/04/18 20:23 linux-4.14.y 74766a973637 cba33199 .config log report syz C
ci2-linux-4-14 2022/03/19 19:24 linux-4.14.y eb045674aab3 cba33199 .config log report syz C
ci2-linux-4-14 2022/02/17 18:57 linux-4.14.y a35d65bedfbc cba33199 .config log report syz C
ci2-linux-4-14 2022/01/18 18:28 linux-4.14.y 4ba8e26127c3 cba33199 .config log report syz C
ci2-linux-4-14 2021/12/19 17:53 linux-4.14.y 9dfbac0e6b86 cba33199 .config log report syz C
ci2-linux-4-14 2021/11/19 17:25 linux-4.14.y 5f9f3b0057d5 cba33199 .config log report syz C
ci2-linux-4-14 2021/10/20 16:53 linux-4.14.y 2760370b1649 cba33199 .config log report syz C
ci2-linux-4-14 2021/09/20 16:22 linux-4.14.y f96eb53cbd76 cba33199 .config log report syz C
ci2-linux-4-14 2021/08/21 15:55 linux-4.14.y 162b95d01320 cba33199 .config log report syz C
ci2-linux-4-14 2021/07/22 15:04 linux-4.14.y 964f3712e6a7 cba33199 .config log report syz C
ci2-linux-4-14 2021/06/22 12:20 linux-4.14.y cfb41ef9deb1 cba33199 .config log report syz C
ci2-linux-4-14 2021/05/22 21:54 linux-4.14.y 96afcb20f36f cba33199 .config log report syz C
ci2-linux-4-14 2021/04/22 19:30 linux-4.14.y cf256fbcbe34 cba33199 .config log report syz C
ci2-linux-4-14 2021/03/23 18:56 linux-4.14.y cb83ddcd5332 cba33199 .config log report syz C
ci2-linux-4-14 2021/02/21 12:29 linux-4.14.y 29c52025152b cba33199 .config log report syz C
ci2-linux-4-14 2021/01/07 20:06 linux-4.14.y 1752938529c6 cba33199 .config log report syz C
ci2-linux-4-14 2020/12/08 19:10 linux-4.14.y 47cbf4cc32db cba33199 .config log report syz C
Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/11/08 18:27 linux-4.14.y 6b6446efedb2 cba33199 .config log report syz C