bisecting fixing commit since 2c746135a12e3f329171ed168ca0078d468f6d85 building syzkaller on 0d27f508b6b35d3b12b9fafebd40a1f36950c8f3 testing commit 2c746135a12e3f329171ed168ca0078d468f6d85 with gcc (GCC) 8.1.0 kernel signature: 384c6d277f21c2c7931e689259aae29b98bf9346f1ee3c19c1fb6488ce1e8f04 all runs: crashed: WARNING in sta_info_alloc testing current HEAD 2263955bf7e71ca8419b64d7a60510aad29002f6 testing commit 2263955bf7e71ca8419b64d7a60510aad29002f6 with gcc (GCC) 8.1.0 kernel signature: d4232c7fd339f8a0d4447e18d93ae006c0384cb7e713667b7b6e7f788d5260e0 all runs: crashed: WARNING in sta_info_alloc revisions tested: 2, total time: 22m55.256447705s (build: 16m8.109149683s, test: 6m18.969674678s) the crash still happens on HEAD commit msg: Linux 4.19.170 crash: WARNING in sta_info_alloc IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes 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: 'syz-executor.0': attribute type 16 has an invalid length. WARNING: CPU: 0 PID: 9300 at net/mac80211/ieee80211_i.h:1413 rcu_read_lock include/linux/rcupdate.h:628 [inline] WARNING: CPU: 0 PID: 9300 at net/mac80211/ieee80211_i.h:1413 ieee80211_get_sband net/mac80211/ieee80211_i.h:1410 [inline] WARNING: CPU: 0 PID: 9300 at net/mac80211/ieee80211_i.h:1413 sta_info_alloc+0x118b/0x15a0 net/mac80211/sta_info.c:416 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9300 Comm: syz-executor.0 Not tainted 4.19.170-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+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_get_sband net/mac80211/ieee80211_i.h:1413 [inline] RIP: 0010:sta_info_alloc+0x118b/0x15a0 net/mac80211/sta_info.c:416 Code: 0f 85 08 fc ff ff 48 c7 c2 80 0a f6 88 be 75 02 00 00 48 c7 c7 e0 0a f6 88 c6 05 5e bf 78 03 01 e8 a3 a8 56 00 e9 e4 fb ff ff <0f> 0b e8 4e 79 22 fa 85 c0 74 09 80 3d 41 bf 78 03 00 74 2f e8 ec RSP: 0018:ffff8881d29c7460 EFLAGS: 00010246 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffed103cd7b918 RDX: 1ffffffff1322461 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff8881d29c74b8 R08: 1ffff1103cd7b918 R09: ffffed103ec84552 R10: ffffed103ec84552 R11: ffff8881f6422a93 R12: ffff8881da0f9b20 R13: dffffc0000000000 R14: ffff8881ce91f0c8 R15: ffff8881ce91eb40 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+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:00007f7551db7c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002bb00 RCX: 000000000045deb9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffed61c2edf R14: 00007f7551db89c0 R15: 000000000118bf2c Kernel Offset: disabled Rebooting in 86400 seconds..