WARNING in ieee80211_link_release_channel

Status: upstream: reported C repro on 2025/08/02 09:20
Reported-by: syzbot+15b80e0eb09fd5403e49@syzkaller.appspotmail.com
First crash: 452d, last: 10m
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2026/09/03 upstream (ToT) 940de590b839 C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_link_release_channel wireless -1 syz done done 3 1112d 1152d 0/29 auto-obsoleted due to no activity on 2024/01/21 00:13
linux-6.6 WARNING in ieee80211_link_release_channel -1 157 17h17m 450d 0/2 upstream: reported on 2025/08/04 22:09

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7411 at net/mac80211/chan.c:2017 ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2017
Modules linked in:
CPU: 0 PID: 7411 Comm: syz.3.1077 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2017
Code: 7c 2d 00 00 74 08 48 89 df e8 0c 17 19 f8 bf 18 1e 00 00 48 03 3b 5b 41 5c 41 5d 41 5e 41 5f 5d e9 15 19 81 00 e8 30 d2 c7 f7 <0f> 0b eb c5 48 c7 c1 24 e9 20 8e 80 e1 07 80 c1 03 38 c1 0f 8c 51
RSP: 0018:ffffc900060bf250 EFLAGS: 00010293
RAX: ffffffff89ba60b0 RBX: ffff88807a62d5a8 RCX: ffff88802dbd8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8e20b46f R09: 1ffffffff1c4168d
R10: dffffc0000000000 R11: fffffbfff1c4168e R12: ffff88807a62eab0
R13: 1ffff1100f4c5ab5 R14: ffff88807a62e228 R15: dffffc0000000000
FS:  00007fcaf85e36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555c33ba38 CR3: 000000001d3c6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_teardown_sdata net/mac80211/iface.c:861 [inline]
 ieee80211_if_change_type+0x205/0xa80 net/mac80211/iface.c:2001
 ieee80211_change_iface+0x58/0x4c0 net/mac80211/cfg.c:217
 rdev_change_virtual_intf net/wireless/rdev-ops.h:74 [inline]
 cfg80211_change_iface+0x786/0xf10 net/wireless/util.c:1209
 nl80211_set_interface+0x601/0x860 net/wireless/nl80211.c:4242
 genl_family_rcv_msg_doit+0x22f/0x350 net/netlink/genetlink.c:756
 genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]
 genl_rcv_msg+0x601/0x790 net/netlink/genetlink.c:850
 netlink_rcv_skb+0x1ef/0x440 net/netlink/af_netlink.c:2516
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:861
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x7ad/0x920 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ad/0xbd0 net/netlink/af_netlink.c:1877
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5ed/0x9a0 net/socket.c:2519
 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2573
 __sys_sendmsg net/socket.c:2602 [inline]
 __do_sys_sendmsg net/socket.c:2611 [inline]
 __se_sys_sendmsg+0x1c3/0x2b0 net/socket.c:2609
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcaf779e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcaf85e3028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fcaf7a25fa0 RCX: 00007fcaf779e159
RDX: 0000000000000000 RSI: 0000200000000500 RDI: 0000000000000003
RBP: 00007fcaf783506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcaf7a26038 R14: 00007fcaf7a25fa0 R15: 00007ffe19e28bc8
 </TASK>

Crashes (280):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/21 17:16 linux-6.1.y 1a8763b93150 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/30 15:50 linux-6.1.y 1a8763b93150 7808aef4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/27 01:58 linux-6.1.y 1a8763b93150 a3c7249d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/29 07:27 linux-6.1.y 79807e970724 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/28 16:28 linux-6.1.y 79807e970724 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/28 14:37 linux-6.1.y 79807e970724 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/27 20:15 linux-6.1.y 79807e970724 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/23 09:29 linux-6.1.y 79807e970724 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/22 16:43 linux-6.1.y 79807e970724 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/22 14:58 linux-6.1.y 79807e970724 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/21 16:02 linux-6.1.y 79807e970724 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/21 09:14 linux-6.1.y 79807e970724 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/17 03:27 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/16 19:29 linux-6.1.y 79807e970724 4c840a2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/16 14:43 linux-6.1.y 79807e970724 4c840a2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/15 06:47 linux-6.1.y a500ba24937a 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/14 16:29 linux-6.1.y a500ba24937a 1a71827b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/13 12:30 linux-6.1.y a500ba24937a 5a1eeac4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/09 21:44 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/08 21:52 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/08 07:45 linux-6.1.y a500ba24937a 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/07 19:38 linux-6.1.y a500ba24937a 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/07 12:57 linux-6.1.y a500ba24937a 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/06 03:07 linux-6.1.y a500ba24937a f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/05 16:24 linux-6.1.y a500ba24937a af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/03 16:40 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/03 14:41 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/02 20:34 linux-6.1.y 1a8763b93150 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/02 10:45 linux-6.1.y 1a8763b93150 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/02 04:18 linux-6.1.y 1a8763b93150 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/01 16:03 linux-6.1.y 1a8763b93150 f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/30 22:49 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/30 21:45 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/30 08:57 linux-6.1.y 1a8763b93150 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/29 21:58 linux-6.1.y 1a8763b93150 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/29 20:31 linux-6.1.y 1a8763b93150 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/26 06:36 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/25 08:33 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/25 05:50 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/24 18:52 linux-6.1.y 1a8763b93150 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/24 08:50 linux-6.1.y 1a8763b93150 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/24 08:45 linux-6.1.y 1a8763b93150 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/02 09:19 linux-6.1.y 3594f306da12 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/10/27 08:44 linux-6.1.y 79807e970724 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/10/14 19:25 linux-6.1.y a500ba24937a 1a71827b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/10/14 17:48 linux-6.1.y a500ba24937a 1a71827b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/10/12 21:23 linux-6.1.y a500ba24937a 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/10/12 19:02 linux-6.1.y a500ba24937a 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/10/10 00:13 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/10/05 16:51 linux-6.1.y a500ba24937a af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/10/04 06:53 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/10/02 22:22 linux-6.1.y 1a8763b93150 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/29 10:29 linux-6.1.y 1a8763b93150 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/26 07:57 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/03/26 09:07 linux-6.1.y 1989cd3d56e2 c6143aac .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
* Struck through repros no longer work on HEAD.