bisecting fixing commit since 811218eceeaa7618652e1b8d11caeff67ab42072 building syzkaller on 624dad51316f9973e1349b6c71e789737d1e00d9 testing commit 811218eceeaa7618652e1b8d11caeff67ab42072 with gcc (GCC) 8.4.1 20210217 kernel signature: 76b6e944920cb4967d31dcd3a4ac3ac6b2cdaf117c95473e747a194270837b78 all runs: crashed: WARNING in sta_info_alloc testing current HEAD 2034d6f0838e465dd8f120c4e946d8444b4bb5df testing commit 2034d6f0838e465dd8f120c4e946d8444b4bb5df with gcc (GCC) 8.4.1 20210217 kernel signature: 24cde9dbe214bb500622e8dcfc8a088d873cbe2b77fb648356567a05fa512062 all runs: crashed: WARNING in sta_info_alloc revisions tested: 2, total time: 26m37.192352537s (build: 19m39.67444232s, test: 6m28.060014982s) the crash still happens on HEAD commit msg: Linux 4.19.184 crash: WARNING in sta_info_alloc IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready WARNING: CPU: 0 PID: 9929 at net/mac80211/ieee80211_i.h:1414 rcu_read_lock include/linux/rcupdate.h:628 [inline] WARNING: CPU: 0 PID: 9929 at net/mac80211/ieee80211_i.h:1414 ieee80211_get_sband net/mac80211/ieee80211_i.h:1411 [inline] WARNING: CPU: 0 PID: 9929 at net/mac80211/ieee80211_i.h:1414 sta_info_alloc+0x118b/0x15a0 net/mac80211/sta_info.c:416 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9929 Comm: syz-executor.0 Not tainted 4.19.184-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/0x226 lib/dump_stack.c:118 panic+0x1cd/0x375 kernel/panic.c:186 __warn.cold.7+0x1b/0x36 kernel/panic.c:541 report_bug+0x1a1/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [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_get_sband net/mac80211/ieee80211_i.h:1414 [inline] RIP: 0010:sta_info_alloc+0x118b/0x15a0 net/mac80211/sta_info.c:416 Code: 0f 85 08 fc ff ff 48 c7 c2 20 31 f6 88 be 75 02 00 00 48 c7 c7 80 31 f6 88 c6 05 62 52 77 03 01 e8 80 c7 56 00 e9 e4 fb ff ff <0f> 0b e8 6e ef 20 fa 85 c0 74 09 80 3d 45 52 77 03 00 74 2f e8 4c RSP: 0018:ffff88809eeff458 EFLAGS: 00010246 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffed1016884148 RDX: 1ffffffff1322499 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff88809eeff4b0 R08: 1ffff11016884148 R09: ffffed1017444552 R10: ffffed1017444552 R11: ffff8880ba222a93 R12: ffff8880a8da19e0 R13: dffffc0000000000 R14: ffff88809edda848 R15: ffff88809edda2c0 ieee80211_add_station+0x1fe/0x500 net/mac80211/cfg.c:1435 rdev_add_station net/wireless/rdev-ops.h:176 [inline] nl80211_new_station+0x8db/0x15a0 net/wireless/nl80211.c:5601 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+0x667/0xc60 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: 0033:0x465b09 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f623e723188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd330c337f R14: 00007f623e723300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..