ci starts bisection 2022-12-26 01:25:08.394919559 +0000 UTC m=+273116.718101732 bisecting fixing commit since c00c5e1d157bec0ef0b0b59aa5482eb8dc7e8e49 building syzkaller on 131df97d431404458e805009bda794abfb00f45f ensuring issue is reproducible on original commit c00c5e1d157bec0ef0b0b59aa5482eb8dc7e8e49 testing commit c00c5e1d157bec0ef0b0b59aa5482eb8dc7e8e49 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 6e91c4cd91b8d227f48e47b0adad06858d2de4eba8aee1599f6f0b8e8cc958d5 all runs: crashed: WARNING in __rate_control_send_low testing current HEAD 1b929c02afd37871d5afb9d498426f83432e71c2 testing commit 1b929c02afd37871d5afb9d498426f83432e71c2 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 15ab68b3e9301e3dac4d5664bd935137f33348d78e3eaf4cecc05c91b8893bb3 all runs: crashed: WARNING in __rate_control_send_low revisions tested: 2, total time: 28m10.274129305s (build: 14m55.42138975s, test: 12m2.081201342s) the crash still happens on HEAD commit msg: Linux 6.2-rc1 crash: WARNING in __rate_control_send_low ------------[ cut here ]------------ no supported rates for sta (null) (0xffffffff, band 0) in rate_mask 0x0 with flags 0x0 WARNING: CPU: 1 PID: 400 at net/mac80211/rate.c:379 __rate_control_send_low+0x53d/0x8f0 net/mac80211/rate.c:379 Modules linked in: CPU: 1 PID: 400 Comm: syz-executor418 Not tainted 6.2.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__rate_control_send_low+0x53d/0x8f0 net/mac80211/rate.c:379 Code: 44 24 10 8b 4c 24 08 41 8b 94 9a d4 00 00 00 44 8b 04 24 45 89 e9 4c 89 d6 48 89 44 24 08 48 c7 c7 a0 12 25 8a e8 2a 06 6c 00 <0f> 0b 48 8b 44 24 08 e9 57 fd ff ff 48 89 4c 24 48 4c 89 54 24 40 RSP: 0018:ffffc900001e09b0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 000000000000000c RCX: 0000000000000000 RDX: 0000000000000101 RSI: ffffffff89663400 RDI: fffff5200003c128 RBP: ffff8880241e9b68 R08: 0000000000000001 R09: ffffc900001e07d7 R10: fffff5200003c0fa R11: 0000000000000001 R12: ffff88801df5b3c8 R13: 0000000000000000 R14: ffff88801d6fd590 R15: dffffc0000000000 FS: 0000555556b37300(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000180 CR3: 0000000024d2e000 CR4: 0000000000350ee0 Call Trace: rate_control_send_low+0x220/0x770 net/mac80211/rate.c:404 rate_control_get_rate+0x189/0x5c0 net/mac80211/rate.c:916 ieee80211_beacon_get_finish+0x3e1/0x740 net/mac80211/tx.c:5179 __ieee80211_beacon_get+0x6a4/0x1990 net/mac80211/tx.c:5369 ieee80211_beacon_get_tim+0x87/0x3d0 net/mac80211/tx.c:5398 ieee80211_beacon_get include/net/mac80211.h:5275 [inline] mac80211_hwsim_beacon_tx+0x165/0x940 drivers/net/wireless/mac80211_hwsim.c:2086 __iterate_interfaces+0x101/0x370 net/mac80211/util.c:799 ieee80211_iterate_active_interfaces_atomic+0x53/0xf0 net/mac80211/util.c:835 mac80211_hwsim_beacon+0xdd/0x1f0 drivers/net/wireless/mac80211_hwsim.c:2142 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x56e/0xcc0 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x340 kernel/time/hrtimer.c:1766 __do_softirq+0x1f7/0xad8 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:skb_tailroom include/linux/skbuff.h:2663 [inline] RIP: 0010:nla_put+0x60/0x140 lib/nlattr.c:1061 Code: 97 00 00 00 8b 45 74 31 ff 85 c0 75 67 48 8d bd c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 89 f8 49 c1 e8 03 41 0f b6 04 00 <84> c0 74 08 3c 03 0f 8e a6 00 00 00 48 8d bd bc 00 00 00 8b 9d c0 RSP: 0018:ffffc900049df508 EFLAGS: 00000212 RAX: 0000000000000000 RBX: ffff8880261d8288 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000000000000001e RDI: ffff8880241e9d40 RBP: ffff8880241e9c80 R08: 1ffff1100483d3a8 R09: ffffc900049df618 R10: fffff5200093bec7 R11: 0000000000000000 R12: 000000000000001a R13: ffffc900049df5d8 R14: dffffc0000000000 R15: ffffed100483d3a9 nla_nest_start_noflag include/net/netlink.h:1816 [inline] ctrl_fill_info+0x767/0xb80 net/netlink/genetlink.c:1118 ctrl_build_family_msg+0x53/0x90 net/netlink/genetlink.c:1247 ctrl_getfamily+0x2cc/0x490 net/netlink/genetlink.c:1323 genl_family_rcv_msg_doit.isra.0+0x1b8/0x290 net/netlink/genetlink.c:968 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline] genl_rcv_msg+0x3c5/0x6c0 net/netlink/genetlink.c:1065 netlink_rcv_skb+0x126/0x380 net/netlink/af_netlink.c:2564 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x433/0x710 net/netlink/af_netlink.c:1356 netlink_sendmsg+0x782/0xc30 net/netlink/af_netlink.c:1932 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:734 __sys_sendto+0x1bb/0x290 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:2125 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f27144abe66 Code: 48 c7 c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 72 c3 90 55 48 83 ec 30 44 89 4c 24 2c 4c 89 RSP: 002b:00007ffe1d10eac8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ffe1d10eb80 RCX: 00007f27144abe66 RDX: 0000000000000020 RSI: 00007ffe1d10ebd0 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007ffe1d10eae4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d10eb3c R13: 00007ffe1d10ebd0 R14: 0000000000000005 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 97 xchg %eax,%edi 1: 00 00 add %al,(%rax) 3: 00 8b 45 74 31 ff add %cl,-0xce8bbb(%rbx) 9: 85 c0 test %eax,%eax b: 75 67 jne 0x74 d: 48 8d bd c0 00 00 00 lea 0xc0(%rbp),%rdi 14: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1b: fc ff df 1e: 49 89 f8 mov %rdi,%r8 21: 49 c1 e8 03 shr $0x3,%r8 25: 41 0f b6 04 00 movzbl (%r8,%rax,1),%eax * 2a: 84 c0 test %al,%al <-- trapping instruction 2c: 74 08 je 0x36 2e: 3c 03 cmp $0x3,%al 30: 0f 8e a6 00 00 00 jle 0xdc 36: 48 8d bd bc 00 00 00 lea 0xbc(%rbp),%rdi 3d: 8b .byte 0x8b 3e: 9d popfq 3f: c0 .byte 0xc0