bisecting fixing commit since b94de4d19498b454645b72d08a05d32fa9074fb5 building syzkaller on cba33199be220cbf61f7c0c8223d88a25a913d6f testing commit b94de4d19498b454645b72d08a05d32fa9074fb5 with gcc (GCC) 8.1.0 kernel signature: 0465f932977ccccf88f2ee60cd4e134667a6edf3df2337edbd287edc9ef357c0 all runs: crashed: WARNING in ieee80211_check_rate_mask testing current HEAD 3207316b3beec7e38e5dbe2f463df0cec71e0b97 testing commit 3207316b3beec7e38e5dbe2f463df0cec71e0b97 with gcc (GCC) 8.1.0 kernel signature: 1d3afdba9721c5e7aef52a8c1582332d14b95c1ca2aa1f664276a54e66564df8 all runs: crashed: WARNING in ieee80211_check_rate_mask revisions tested: 2, total time: 23m9.496402127s (build: 16m47.073950547s, test: 5m49.593712039s) the crash still happens on HEAD commit msg: Linux 4.19.164 crash: WARNING in ieee80211_check_rate_mask IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'. WARNING: CPU: 0 PID: 9301 at net/mac80211/rate.c:279 ieee80211_check_rate_mask+0x1f3/0x2c0 net/mac80211/rate.c:293 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9301 Comm: syz-executor.3 Not tainted 4.19.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x17c/0x22a lib/dump_stack.c:118 panic+0x1cd/0x375 kernel/panic.c:186 __warn.cold.7+0x1b/0x3e kernel/panic.c:541 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:ieee80211_check_rate_mask+0x1f3/0x2c0 net/mac80211/rate.c:279 Code: 89 e2 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 c6 00 00 00 41 89 86 c8 09 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b eb ed 4c 89 e7 89 4d d4 e8 9e 91 40 fa 8b 4d d4 e9 93 fe ff RSP: 0018:ffff8881d426f4e0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8881d30d5300 RCX: 0000000000000000 RDX: 1ffff1103a61ac59 RSI: ffff8881d2b93468 RDI: ffff8881d30d62c8 RBP: ffff8881d426f518 R08: ffff8881e7f3a2e1 R09: 0000000000000004 R10: ffffed103a572690 R11: 0000000000000000 R12: ffff8881d2b93558 R13: ffff8881d30d5300 R14: 0000000000000000 R15: ffff8881d426f5c8 ieee80211_change_bss+0x409/0x930 net/mac80211/cfg.c:2066 rdev_change_bss net/wireless/rdev-ops.h:380 [inline] nl80211_set_bss+0x675/0xce0 net/wireless/nl80211.c:6029 genl_family_rcv_msg+0x599/0x1000 net/netlink/genetlink.c:602 genl_rcv_msg+0xa7/0x140 net/netlink/genetlink.c:627 netlink_rcv_skb+0x13e/0x3d0 net/netlink/af_netlink.c:2455 genl_rcv+0x23/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x443/0x660 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x666/0xc50 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xac/0xf0 net/socket.c:632 ___sys_sendmsg+0x647/0x950 net/socket.c:2115 __sys_sendmsg+0xd9/0x180 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2160 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45deb9 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f44b5ad5c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002b8c0 RCX: 000000000045deb9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffe4ccaee0f R14: 00007f44b5ad69c0 R15: 000000000118bf2c Kernel Offset: disabled Rebooting in 86400 seconds..