syzbot
WARNING in cfg80211_wext_siwrate
Status:
upstream: reported C repro on 2026/08/07 00:01
Subsystems:
wireless
Labels:
prio:low
[Documentation on labels]
Reported-by: syzbot+af177aa139efdd13a9da@syzkaller.appspotmail.com
First crash: 11d, last: 2d18h
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Last patch testing requests (1)
| Created |
Duration |
User |
Patch |
Repo |
Result |
| 2026/08/11 14:58 |
55m
|
nogikh@google.com
|
|
bpf |
report
job log
log
|
Sample crash report:
warning: `syz-executor384' uses wireless extensions which will stop working for Wi-Fi 7 hardware; use nl80211
------------[ cut here ]------------
wlan3: Failed check-sdata-in-driver check, flags: 0x0
WARNING: net/mac80211/driver-ops.h:884 at drv_set_bitrate_mask net/mac80211/driver-ops.h:884 [inline], CPU#1: syz-executor384/5956
WARNING: net/mac80211/driver-ops.h:884 at ieee80211_set_bitrate_mask+0x1034/0x1320 net/mac80211/cfg.c:4134, CPU#1: syz-executor384/5956
Modules linked in:
CPU: 1 UID: 0 PID: 5956 Comm: syz-executor384 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:drv_set_bitrate_mask net/mac80211/driver-ops.h:884 [inline]
RIP: 0010:ieee80211_set_bitrate_mask+0x1084/0x1320 net/mac80211/cfg.c:4134
Code: 20 01 00 00 48 85 c0 49 0f 44 ee 48 b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 0f 85 3b 01 00 00 41 8b 17 4c 89 ef 48 89 ee <67> 48 0f b9 3a e9 c3 fd ff ff e8 9d 71 82 f6 90 0f 0b 90 e9 41 fe
RSP: 0018:ffffc9000374f778 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff1100ff9eb25 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffff88807fcf4120 RDI: ffffffff90698350
RBP: ffff88807fcf4120 R08: ffff888073d00faf R09: 1ffff1100e7a01f5
R10: dffffc0000000000 R11: ffffed100e7a01f6 R12: ffff888073d00740
R13: ffffffff90698350 R14: ffff88807fcf5938 R15: ffff88807fcf5928
FS: 000055555d18b400(0000) GS:ffff888125055000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0604dea286 CR3: 00000000784fe000 CR4: 00000000003526f0
Call Trace:
<TASK>
rdev_set_bitrate_mask net/wireless/rdev-ops.h:683 [inline]
cfg80211_wext_siwrate+0x78d/0x9d0 net/wireless/wext-compat.c:1238
ioctl_standard_call+0xc5/0x160 net/wireless/wext-core.c:1042
wireless_process_ioctl net/wireless/wext-core.c:-1 [inline]
wext_ioctl_dispatch+0xee/0x410 net/wireless/wext-core.c:1013
wext_handle_ioctl+0x110/0x1d0 net/wireless/wext-core.c:1074
sock_ioctl+0x159/0x7e0 net/socket.c:1353
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3f2a1ec9eb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007fff6cea1560 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3f2a1ec9eb
RDX: 00007fff6cea15c0 RSI: 0000000000008b20 RDI: 0000000000000003
RBP: 00007fff6cea1640 R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff6cea15e0
R13: 00007f3f2a248aa1 R14: 00007f3f2a270cc0 R15: 0000000000000002
</TASK>
----------------
Code disassembly (best guess):
0: 20 01 and %al,(%rcx)
2: 00 00 add %al,(%rax)
4: 48 85 c0 test %rax,%rax
7: 49 0f 44 ee cmove %r14,%rbp
b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
12: fc ff df
15: 0f b6 04 03 movzbl (%rbx,%rax,1),%eax
19: 84 c0 test %al,%al
1b: 0f 85 3b 01 00 00 jne 0x15c
21: 41 8b 17 mov (%r15),%edx
24: 4c 89 ef mov %r13,%rdi
27: 48 89 ee mov %rbp,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: e9 c3 fd ff ff jmp 0xfffffdf7
34: e8 9d 71 82 f6 call 0xf68271d6
39: 90 nop
3a: 0f 0b ud2
3c: 90 nop
3d: e9 .byte 0xe9
3e: 41 rex.B
3f: fe .byte 0xfe
* Struck through repros no longer work on HEAD.