syzbot


WARNING in ieee80211_tx_h_rate_ctrl

Status: upstream: reported on 2025/11/07 15:30
Reported-by: syzbot+35ad01f7f3622937dc14@syzkaller.appspotmail.com
First crash: 85d, last: 17d
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in ieee80211_tx_h_rate_ctrl -1 2 44d 57d 0/3 upstream: reported on 2025/12/04 23:51
upstream WARNING in ieee80211_tx_h_rate_ctrl wireless -1 648 10d 247d 0/29 upstream: reported on 2025/05/29 12:33

Sample crash report:
------------[ cut here ]------------
wlan1: Dropped data frame as no usable bitrate found while scanning and associated. Target station: 08:02:11:00:00:00 on 5 GHz band
WARNING: CPU: 1 PID: 2933 at net/mac80211/tx.c:769 ieee80211_tx_h_rate_ctrl+0xc7e/0x1770 net/mac80211/tx.c:762
Modules linked in:
CPU: 1 PID: 2933 Comm: kworker/u4:7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:ieee80211_tx_h_rate_ctrl+0xc7e/0x1770 net/mac80211/tx.c:762
Code: 8b 36 45 31 f6 83 e6 07 41 0f 95 c6 31 ff e8 39 69 9e f7 43 8d 4c 76 02 48 c7 c7 80 9c be 8b 48 89 de 4c 89 fa e8 62 c7 68 f7 <0f> 0b 41 bf 01 00 00 00 e9 eb 02 00 00 e8 60 65 9e f7 e9 70 fa ff
RSP: 0018:ffffc9000bdc74e0 EFLAGS: 00010246
RAX: ad26f6fa6d241600 RBX: ffff8880664515b0 RCX: ffff88802bb30000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc9000bdc7650 R08: ffffc9000bdc70e7 R09: 1ffff920017b8e1c
R10: dffffc0000000000 R11: fffff520017b8e1d R12: dffffc0000000000
R13: ffffc9000bdc7808 R14: 0000000000000001 R15: ffff88805f617444
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8ba8ffaf98 CR3: 000000005d90a000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 invoke_tx_handlers_late+0xb6/0x1810 net/mac80211/tx.c:1862
 ieee80211_tx+0x2ad/0x420 net/mac80211/tx.c:1983
 __ieee80211_tx_skb_tid_band+0x4d5/0x610 net/mac80211/tx.c:6081
 ieee80211_tx_skb_tid_band net/mac80211/ieee80211_i.h:2276 [inline]
 ieee80211_send_scan_probe_req net/mac80211/scan.c:641 [inline]
 ieee80211_scan_state_send_probe+0x560/0x930 net/mac80211/scan.c:669
 ieee80211_scan_work+0x4e8/0x1c30 net/mac80211/scan.c:1139
 cfg80211_wiphy_work+0x225/0x260 net/wireless/core.c:437
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/13 23:32 linux-6.6.y c596736dadab d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_tx_h_rate_ctrl
2025/12/04 23:48 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_tx_h_rate_ctrl
2025/11/08 12:50 linux-6.6.y 0a805b6ea8cd 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_tx_h_rate_ctrl
2025/11/08 01:35 linux-6.6.y 0a805b6ea8cd 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_tx_h_rate_ctrl
2025/11/07 15:30 linux-6.6.y 0a805b6ea8cd 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_tx_h_rate_ctrl
* Struck through repros no longer work on HEAD.