bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on 8b3eaf58f88f0e0a776866110d9baf8367dde8f0
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636 with gcc (GCC) 8.1.0
kernel signature: 750851731106300a61c844913169fe3dd33a9932aae698b9b5c609e199fdcfe2
all runs: crashed: WARNING in ieee80211_check_rate_mask
testing current HEAD 2d2791fce891fc20709232d49a6bae075b9a77f8
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8 with gcc (GCC) 8.1.0
kernel signature: 5988a54e8bb2aa784dea7ec9b783e15addd3c41c173431c8f1a3d172f49bafcd
all runs: crashed: WARNING in ieee80211_check_rate_mask
revisions tested: 2, total time: 22m3.943476961s (build: 15m56.907044634s, test: 5m37.072794973s)
the crash still happens on HEAD
commit msg: Linux 4.14.217
crash: WARNING in ieee80211_check_rate_mask
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'.
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9181 at net/mac80211/rate.c:279 ieee80211_check_rate_mask+0x1f3/0x2c0 net/mac80211/rate.c:276
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 9181 Comm: syz-executor.2 Not tainted 4.14.217-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x14b/0x1e7 lib/dump_stack.c:58
 panic+0x1b0/0x358 kernel/panic.c:183
 __warn.cold.7+0x25/0x25 kernel/panic.c:547
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 do_error_trap+0x1bd/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:ieee80211_check_rate_mask+0x1f3/0x2c0 net/mac80211/rate.c:279
RSP: 0018:ffff8881ddee74f8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8881e883d580 RCX: 0000000000000000
RDX: 1ffff1103d107cb2 RSI: ffff8881d2b532a0 RDI: ffff8881e883e590
RBP: ffff8881ddee7530 R08: ffff8881e1c37361 R09: 0000000000000004
R10: ffffed103a56a657 R11: 0000000000000000 R12: ffff8881d2b53378
R13: ffff8881e883d580 R14: 0000000000000000 R15: ffff8881ddee75d8
 ieee80211_change_bss+0x409/0x930 net/mac80211/cfg.c:2052
 rdev_change_bss net/wireless/rdev-ops.h:380 [inline]
 nl80211_set_bss+0x658/0xdd0 net/wireless/nl80211.c:5690
 genl_family_rcv_msg+0x57f/0xfe0 net/netlink/genetlink.c:600
 genl_rcv_msg+0xa7/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x12f/0x3b0 net/netlink/af_netlink.c:2433
 genl_rcv+0x23/0x40 net/netlink/genetlink.c:636
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x40b/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x657/0xc60 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xac/0xf0 net/socket.c:656
 ___sys_sendmsg+0x625/0x920 net/socket.c:2062
 __sys_sendmsg+0xc1/0x140 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0xd/0x20 net/socket.c:2103
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45de59
RSP: 002b:00007f0ab4fd1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002b8c0 RCX: 000000000045de59
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffc5bbacbbf R14: 00007f0ab4fd29c0 R15: 000000000118bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..