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WARNING in ieee80211_start_next_roc

Status: upstream: reported C repro on 2020/11/08 18:11
Reported-by: syzbot+c63745cb0e718ef69011@syzkaller.appspotmail.com
First crash: 812d, last: 10d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in ieee80211_start_next_roc C error 72 12d 751d 0/1 upstream: reported C repro on 2021/01/09 02:54
upstream WARNING in ieee80211_start_next_roc C unreliable 456 1d09h 782d 0/24 upstream: reported C repro on 2020/12/09 02:03

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 22 at net/mac80211/offchannel.c:419 ieee80211_start_next_roc+0x1ca/0x220 net/mac80211/offchannel.c:419
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 22 Comm: kworker/u4:1 Not tainted 4.14.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy3 ieee80211_scan_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_start_next_roc+0x1ca/0x220 net/mac80211/offchannel.c:419
RSP: 0018:ffff8880b55ffbd0 EFLAGS: 00010297
RAX: ffff8880b55ee5c0 RBX: ffff888093edfc80 RCX: 1ffffffff1279f18
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff888093edfca0
RBP: ffff8880a37a8fa0 R08: ffffffff8b9c4298 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880a37a9e48 R14: ffff8880a8cd8840 R15: ffff8880a37a9fe8
 __ieee80211_scan_completed+0x7bf/0x14d0 net/mac80211/scan.c:415
 ieee80211_scan_work+0x300/0x15a0 net/mac80211/scan.c:962
 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 Assets Title
ci2-linux-4-14 2023/01/19 13:04 linux-4.14.y 97205fccccdc cba33199 .config console log report syz C
ci2-linux-4-14 2022/10/26 09:18 linux-4.14.y 9d5c0b3a8e1a cba33199 .config console log report syz C
ci2-linux-4-14 2022/09/16 00:06 linux-4.14.y 5df8b4735177 cba33199 .config console log report syz C
ci2-linux-4-14 2022/08/16 23:30 linux-4.14.y b641242202ed cba33199 .config console log report syz C
ci2-linux-4-14 2022/07/17 22:56 linux-4.14.y 424a46ea058e cba33199 .config console log report syz C
ci2-linux-4-14 2022/06/17 22:34 linux-4.14.y 84bae26850e3 cba33199 .config console log report syz C
ci2-linux-4-14 2022/05/18 20:28 linux-4.14.y dffb5c6ff09c cba33199 .config console log report syz C
ci2-linux-4-14 2022/04/18 19:24 linux-4.14.y 74766a973637 cba33199 .config console log report syz C
ci2-linux-4-14 2022/03/19 18:45 linux-4.14.y eb045674aab3 cba33199 .config console log report syz C
ci2-linux-4-14 2022/02/17 18:24 linux-4.14.y a35d65bedfbc cba33199 .config console log report syz C
ci2-linux-4-14 2022/01/18 17:54 linux-4.14.y 4ba8e26127c3 cba33199 .config console log report syz C
ci2-linux-4-14 2021/12/19 17:16 linux-4.14.y 9dfbac0e6b86 cba33199 .config console log report syz C
ci2-linux-4-14 2021/11/19 16:45 linux-4.14.y 5f9f3b0057d5 cba33199 .config console log report syz C
ci2-linux-4-14 2021/10/20 16:10 linux-4.14.y 2760370b1649 cba33199 .config console log report syz C
ci2-linux-4-14 2021/09/20 15:48 linux-4.14.y f96eb53cbd76 cba33199 .config console log report syz C
ci2-linux-4-14 2021/08/21 15:21 linux-4.14.y 162b95d01320 cba33199 .config console log report syz C
ci2-linux-4-14 2021/07/22 14:31 linux-4.14.y 964f3712e6a7 cba33199 .config console log report syz C
ci2-linux-4-14 2021/06/22 11:45 linux-4.14.y cfb41ef9deb1 cba33199 .config console log report syz C
ci2-linux-4-14 2021/05/22 20:38 linux-4.14.y 96afcb20f36f cba33199 .config console log report syz C
ci2-linux-4-14 2021/04/22 17:57 linux-4.14.y cf256fbcbe34 cba33199 .config console log report syz C
ci2-linux-4-14 2021/03/23 17:32 linux-4.14.y cb83ddcd5332 cba33199 .config console log report syz C
ci2-linux-4-14 2021/02/21 11:55 linux-4.14.y 29c52025152b cba33199 .config console log report syz C
ci2-linux-4-14 2021/01/07 18:55 linux-4.14.y 1752938529c6 cba33199 .config console log report syz C
ci2-linux-4-14 2020/12/08 18:33 linux-4.14.y 47cbf4cc32db cba33199 .config console log report syz C
* Struck through repros no longer work on HEAD.
Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-linux-4-14 2020/11/08 18:10 linux-4.14.y 6b6446efedb2 cba33199 .config console log report syz C
* Struck through repros no longer work on HEAD.