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Message-ID: <CANp29Y68ZaQnb0R2fZSLjcCxiOE3uZyW4b7wLEYMAycF0WHNUg@mail.gmail.com> Date: Tue, 17 Jun 2025 11:34:27 +0200 From: Aleksandr Nogikh <nogikh@...gle.com> To: syzbot <syzbot+468656785707b0e995df@...kaller.appspotmail.com> Cc: johannes@...solutions.net, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [wireless?] WARNING: net/mac80211/tx.c:LINE at __ieee80211_beacon_get, CPU: syz.NUM.NUM/NUM #syz dup: WARNING in __ieee80211_beacon_get On Tue, Jun 17, 2025 at 4:32 AM syzbot <syzbot+468656785707b0e995df@...kaller.appspotmail.com> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 050f8ad7b58d Add linux-next specific files for 20250616 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=125e190c580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d2efc7740224b93a > dashboard link: https://syzkaller.appspot.com/bug?extid=468656785707b0e995df > compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/49faa18d2f53/disk-050f8ad7.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/7c6f9cd7fe5d/vmlinux-050f8ad7.xz > kernel image: https://storage.googleapis.com/syzbot-assets/84a08d6403ee/bzImage-050f8ad7.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+468656785707b0e995df@...kaller.appspotmail.com > > ------------[ cut here ]------------ > WARNING: net/mac80211/tx.c:5024 at __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5024 [inline], CPU#1: syz.4.243/6807 > WARNING: net/mac80211/tx.c:5024 at __ieee80211_beacon_get+0x125d/0x1630 net/mac80211/tx.c:5453, CPU#1: syz.4.243/6807 > Modules linked in: > CPU: 1 UID: 0 PID: 6807 Comm: syz.4.243 Not tainted 6.16.0-rc2-next-20250616-syzkaller #0 PREEMPT(full) > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 > RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5024 [inline] > RIP: 0010:__ieee80211_beacon_get+0x125d/0x1630 net/mac80211/tx.c:5453 > Code: e7 e8 27 f2 2f f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 78 fe ff ff e8 92 bf d6 f6 90 0f 0b 90 e9 e0 f7 ff ff e8 84 bf d6 f6 90 <0f> 0b 90 e9 38 fb ff ff e8 76 bf d6 f6 48 c7 c7 a0 5c 79 8f 4c 89 > RSP: 0018:ffffc90000a089f8 EFLAGS: 00010246 > RAX: ffffffff8ae9aaac RBX: ffffffff8ae99886 RCX: ffff888025e8da00 > RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 > RBP: 0000000000000000 R08: ffff888025e8da00 R09: 0000000000000003 > R10: 0000000000000007 R11: 0000000000000100 R12: ffff888058976500 > R13: dffffc0000000000 R14: ffff8880589769d0 R15: ffff888032955024 > FS: 00007fbd84f5b6c0(0000) GS:ffff888125d40000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000555570bf35c8 CR3: 000000002eed6000 CR4: 00000000003526f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <IRQ> > ieee80211_beacon_get_tim+0xb4/0x2b0 net/mac80211/tx.c:5580 > ieee80211_beacon_get include/net/mac80211.h:5638 [inline] > mac80211_hwsim_beacon_tx+0x3ce/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2319 > __iterate_interfaces+0x2a8/0x590 net/mac80211/util.c:761 > ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 > mac80211_hwsim_beacon+0xbb/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2353 > __run_hrtimer kernel/time/hrtimer.c:1761 [inline] > __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825 > hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 > handle_softirqs+0x283/0x870 kernel/softirq.c:579 > __do_softirq kernel/softirq.c:613 [inline] > invoke_softirq kernel/softirq.c:453 [inline] > __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 > irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 > instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] > sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 > </IRQ> > <TASK> > asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 > RIP: 0010:finish_wait+0x5/0x1f0 kernel/sched/wait.c:358 > Code: 0f 1e fa 44 89 ef e8 7a 68 f5 ff eb 96 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 10 48 89 f3 49 89 fd 48 bd 00 > RSP: 0018:ffffc9001bccf5f0 EFLAGS: 00000246 > RAX: 7fffffffffffffff RBX: dffffc0000000000 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffffc9001bccf640 RDI: ffff888028058700 > RBP: ffffc9001bccf6f0 R08: ffffffff8fa14ff7 R09: 1ffffffff1f429fe > R10: dffffc0000000000 R11: fffffbfff1f429ff R12: ffff888028058700 > R13: ffffc9001bccf640 R14: 1ffff92003799ec4 R15: 7fffffffffffffff > unix_wait_for_peer+0x22f/0x2e0 net/unix/af_unix.c:1587 > unix_dgram_sendmsg+0xb1f/0x1870 net/unix/af_unix.c:2188 > sock_sendmsg_nosec net/socket.c:712 [inline] > __sock_sendmsg+0x219/0x270 net/socket.c:727 > ____sys_sendmsg+0x52d/0x830 net/socket.c:2566 > ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 > __sys_sendmmsg+0x227/0x430 net/socket.c:2709 > __do_sys_sendmmsg net/socket.c:2736 [inline] > __se_sys_sendmmsg net/socket.c:2733 [inline] > __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2733 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7fbd8418e929 > 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 a8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007fbd84f5b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 > RAX: ffffffffffffffda RBX: 00007fbd843b5fa0 RCX: 00007fbd8418e929 > RDX: 0400000000000041 RSI: 0000200000000000 RDI: 0000000000000005 > RBP: 00007fbd84210b39 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 0000000000000000 R14: 00007fbd843b5fa0 R15: 00007ffe98cac8e8 > </TASK> > ---------------- > Code disassembly (best guess): > 0: 0f 1e fa nop %edx > 3: 44 89 ef mov %r13d,%edi > 6: e8 7a 68 f5 ff call 0xfff56885 > b: eb 96 jmp 0xffffffa3 > d: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) > 14: 00 > 15: 90 nop > 16: 90 nop > 17: 90 nop > 18: 90 nop > 19: 90 nop > 1a: 90 nop > 1b: 90 nop > 1c: 90 nop > 1d: 90 nop > 1e: 90 nop > 1f: 90 nop > 20: 90 nop > 21: 90 nop > 22: 90 nop > 23: 90 nop > 24: 90 nop > 25: f3 0f 1e fa endbr64 > 29: 55 push %rbp > * 2a: 41 57 push %r15 <-- trapping instruction > 2c: 41 56 push %r14 > 2e: 41 55 push %r13 > 30: 41 54 push %r12 > 32: 53 push %rbx > 33: 48 83 ec 10 sub $0x10,%rsp > 37: 48 89 f3 mov %rsi,%rbx > 3a: 49 89 fd mov %rdi,%r13 > 3d: 48 rex.W > 3e: bd .byte 0xbd > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@...glegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@...glegroups.com. > To view this discussion visit https://groups.google.com/d/msgid/syzkaller-bugs/6850d3bd.a70a0220.395abc.01fa.GAE%40google.com.
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