syzbot


WARNING in ieee80211_determine_chantype

Status: upstream: reported on 2025/08/19 20:56
Reported-by: syzbot+0c89109adfe3d5737326@syzkaller.appspotmail.com
First crash: 8d13h, last: 8d13h

Sample crash report:
wlan1: authenticate with 08:02:11:00:00:00
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7770 at net/mac80211/mlme.c:335 ieee80211_determine_chantype+0x7d4/0xef0 net/mac80211/mlme.c:335
Modules linked in:
CPU: 1 PID: 7770 Comm: syz.5.1040 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : ieee80211_determine_chantype+0x7d4/0xef0 net/mac80211/mlme.c:335
lr : ieee80211_determine_chantype+0x7d4/0xef0 net/mac80211/mlme.c:335
sp : ffff80001fe86660
x29: ffff80001fe867c0 x28: 0000000000000001 x27: 0000000000000003
x26: 1fffe0001e424a51 x25: 0000000000010810 x24: 1fffe0001aa8a6ae
x23: 0000000000000000 x22: ffff80001fe86938 x21: ffff0000f2125288
x20: ffff80001fe86930 x19: dfff800000000000 x18: 0000000000000000
x17: 0000000000000002 x16: ffff800010a19950 x15: 000000000000000c
x14: 0000000000ff0100 x13: ffffffffffffffff x12: 0000000000080000
x11: 000000000000392b x10: ffff80002b608000 x9 : ffff800010c2c868
x8 : 000000000000392c x7 : 0000096c00000000 x6 : ffff0000d5453570
x5 : ffff80001fe86720 x4 : ffff80001fe86950 x3 : ffff800010c2c3bc
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 ieee80211_determine_chantype+0x7d4/0xef0 net/mac80211/mlme.c:335
 ieee80211_prep_channel net/mac80211/mlme.c:5160 [inline]
 ieee80211_prep_connection+0x1e18/0x2fd0 net/mac80211/mlme.c:5373
 ieee80211_mgd_auth+0x858/0xbf0 net/mac80211/mlme.c:5538
 ieee80211_auth+0x28/0x38 net/mac80211/cfg.c:2550
 rdev_auth net/wireless/rdev-ops.h:458 [inline]
 cfg80211_mlme_auth+0x378/0x8a0 net/wireless/mlme.c:273
 cfg80211_conn_do_work+0x3c0/0x980 net/wireless/sme.c:171
 cfg80211_sme_connect net/wireless/sme.c:594 [inline]
 cfg80211_connect+0x1250/0x1c7c net/wireless/sme.c:1277
 nl80211_connect+0xfb0/0x1434 net/wireless/nl80211.c:10950
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0x8b4/0xb6c net/netlink/genetlink.c:792
 netlink_rcv_skb+0x208/0x3c4 net/netlink/af_netlink.c:2507
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x624/0x8b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x6e8/0x9cc net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x61c/0x920 net/socket.c:2436
 ___sys_sendmsg+0x1d0/0x240 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg net/socket.c:2526 [inline]
 __arm64_sys_sendmsg+0x1a8/0x254 net/socket.c:2526
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 880
hardirqs last  enabled at (879): [<ffff80000870d06c>] mod_lruvec_page_state include/linux/vmstat.h:497 [inline]
hardirqs last  enabled at (879): [<ffff80000870d06c>] kmalloc_order+0xc4/0x160 mm/slab_common.c:989
hardirqs last disabled at (880): [<ffff8000111b7ff8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (850): [<ffff80001096ca2c>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (850): [<ffff80001096ca2c>] cfg80211_get_bss+0x824/0xc68 net/wireless/scan.c:1547
softirqs last disabled at (848): [<ffff80001096c328>] spin_lock_bh include/linux/spinlock.h:368 [inline]
softirqs last disabled at (848): [<ffff80001096c328>] cfg80211_get_bss+0x120/0xc68 net/wireless/scan.c:1521
---[ end trace 40cf47969fce8aa9 ]---
wlan1: send auth to 08:02:11:00:00:00 (try 1/3)

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/19 20:56 linux-5.15.y c79648372d02 254a27c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ieee80211_determine_chantype
* Struck through repros no longer work on HEAD.