watchdog: BUG: soft lockup - CPU#1 stuck for 122s! [syz.5.29:6287] Modules linked in: irq event stamp: 10344023 hardirqs last enabled at (10344022): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (10344023): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (53256): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (53256): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (53256): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (53259): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (53259): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (53259): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6287 Comm: syz.5.29 Not tainted 6.15.0-rc4-syzkaller-gd0445d7dd3fd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:__cant_sleep+0x85/0x210 kernel/sched/core.c:8833 Code: f2 f2 f2 4b 89 04 3c 66 43 c7 44 3c 09 f3 f3 43 c6 44 3c 0b f3 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 f6 44 24 41 02 74 56 <65> 8b 05 24 f6 e2 10 25 ff ff ff 7f 39 d0 7f 46 48 c7 c0 00 12 c1 RSP: 0000:ffffc90000a077c0 EFLAGS: 00000202 RAX: f2f2f200f1f1f1f1 RBX: 0000000000000001 RCX: ffff88802f28bc00 RDX: 0000000000000000 RSI: 0000000000000072 RDI: ffffffff8b7032e0 RBP: ffffc90000a07870 R08: 0000000000000001 R09: ffff8880b8932608 R10: dffffc0000000000 R11: fffff91ffffba205 R12: 1ffff92000140ef8 R13: 1ffff92000140f1c R14: ffff8880b8932608 R15: dffffc0000000000 FS: 00007fd018d756c0(0000) GS:ffff8881261ca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c27b4da CR3: 0000000041cf6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: trace_call_bpf+0x89/0x850 kernel/trace/bpf_trace.c:114 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10788 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5829 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:548 kvfree_call_rcu+0xbb/0x410 mm/slab_common.c:1962 cfg80211_update_known_bss+0x634/0x1330 net/wireless/scan.c:1925 __cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1972 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2363 cfg80211_inform_bss_data+0x1f6/0x3ad0 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x362/0x700 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x527/0x9b0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5179 [inline] ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5416 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5439 ieee80211_rx include/net/mac80211.h:5179 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 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:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:222 Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 RSP: 0000:ffffc90003e475d8 EFLAGS: 00000246 RAX: ffffffff81cad4a4 RBX: 0000000000000000 RCX: ffff88802f28bc00 RDX: ffffc9001c48a000 RSI: 000000000000043e RDI: ffffffff8bc1d040 RBP: ffffc90003e476d8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81cad457 R12: 0000000000000001 R13: 1ffff920007c8ec8 R14: ffffffff81cad457 R15: ffffffff8de0aa00 rcu_read_lock include/linux/rcupdate.h:842 [inline] trace_call_bpf+0x104/0x850 kernel/trace/bpf_trace.c:145 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10788 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5829 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4229 sock_alloc_inode+0x28/0xc0 net/socket.c:309 alloc_inode+0x67/0x1b0 fs/inode.c:346 new_inode_pseudo include/linux/fs.h:3309 [inline] sock_alloc net/socket.c:622 [inline] __sock_create+0x12d/0x9f0 net/socket.c:1505 sock_create net/socket.c:1599 [inline] __sys_socket_create net/socket.c:1636 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1683 __do_sys_socket net/socket.c:1697 [inline] __se_sys_socket net/socket.c:1695 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1695 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd017f8e969 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:00007fd018d75038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fd0181b6160 RCX: 00007fd017f8e969 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000010 RBP: 00007fd018010ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd0181b6160 R15: 00007ffce04d1cb8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 3398 Comm: kworker/R-bat_e Not tainted 6.15.0-rc4-syzkaller-gd0445d7dd3fd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: bat_events batadv_nc_worker RIP: 0010:do_perf_trace_lock include/trace/events/lock.h:50 [inline] RIP: 0010:perf_trace_lock+0xd0/0x3b0 include/trace/events/lock.h:50 Code: 00 48 8b 03 48 85 c0 48 c7 c7 c0 cd 6a 8b 48 0f 45 f8 48 89 7c 24 28 e8 ce 99 b4 09 49 89 c5 49 8d 5e 60 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 61 76 84 00 48 8b 03 48 89 44 24 RSP: 0018:ffffc90000007b20 EFLAGS: 00000806 RAX: 1ffffffff1bc1574 RBX: ffffffff8de0aba0 RCX: 000000008b6bb905 RDX: ffffffff81cad457 RSI: ffffffff8df3b860 RDI: ffffffff8b6bb960 RBP: ffffc90000007c08 R08: ffffc90000007d0f R09: 0000000000000000 R10: ffffc90000007d00 R11: ffffffffa0005ad8 R12: 1ffff92000000f6c R13: 000000000000000d R14: ffffffff8de0ab40 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881260ca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f34c8f51e80 CR3: 000000002fa62000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5877 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] trace_call_bpf+0x5a9/0x850 kernel/trace/bpf_trace.c:148 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10788 do_perf_trace_preemptirq_template include/trace/events/preemptirq.h:14 [inline] perf_trace_preemptirq_template+0x280/0x340 include/trace/events/preemptirq.h:14 __do_trace_irq_disable include/trace/events/preemptirq.h:36 [inline] trace_irq_disable+0xee/0x110 include/trace/events/preemptirq.h:36 handle_softirqs+0x5ce/0x870 kernel/softirq.c:594 do_softirq+0xec/0x180 kernel/softirq.c:480 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:407 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_nc_purge_paths+0x318/0x3b0 net/batman-adv/network-coding.c:471 batadv_nc_worker+0x328/0x610 net/batman-adv/network-coding.c:720 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 rescuer_thread+0x53c/0xdd0 kernel/workqueue.c:3496 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245