watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.2.18:5994] Modules linked in: irq event stamp: 11470865 hardirqs last enabled at (11470864): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (11470865): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (118444): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (118444): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (118444): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (118447): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (118447): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (118447): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 5994 Comm: syz.2.18 Not tainted 6.16.0-rc3-syzkaller-ge34a79b96ab9 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x1315/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 <4c> 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8 RSP: 0018:ffffc90000006bf8 EFLAGS: 00000246 RAX: fffffffff1d06088 RBX: ffffffff8fb55020 RCX: dffffc0000000000 RDX: ffffffff8fb55020 RSI: ffffffff9030f8dc RDI: ffffffff8be28ce0 RBP: ffffffff8fb55020 R08: 0000000000000001 R09: ffffffff81728af5 R10: dffffc0000000000 R11: fffff91ffff8ef9d R12: ffffffff8185b40b R13: ffffffff8fb55020 R14: ffffc90000006cc8 R15: ffffffff8fb55020 FS: 00007fd8d1ed56c0(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000843000 CR3: 0000000077d78000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kfree+0x18e/0x440 mm/slub.c:4842 ieee80211_inform_bss+0xbd9/0x10a0 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd05/0x1ac0 net/wireless/scan.c:2367 cfg80211_inform_bss_data+0x1fb/0x3b20 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3313 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5183 [inline] ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5420 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5443 ieee80211_rx include/net/mac80211.h:5185 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441 tasklet_action_common+0x36c/0x580 kernel/softirq.c:829 handle_softirqs+0x286/0x870 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x3a/0xb0 kernel/rcu/tree.c:745 Code: e8 6b be bf 09 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 60 7c ba 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 cc be 7c 00 48 c7 c3 58 2f 9e 92 49 03 1e 48 89 RSP: 0018:ffffc9000471ecc0 EFLAGS: 00000246 RAX: 1ffffffff1b74f8c RBX: 0000000000000000 RCX: 3a6b25518579ca00 RDX: ffff88807eb53c00 RSI: ffffffff8be28d20 RDI: ffffffff8be28ce0 RBP: ffffc9000471edd8 R08: 0000000000000000 R09: ffffffff81cb7ef7 R10: dffffc0000000000 R11: fffff91ffff8eb9d R12: 0000000000000001 R13: 1ffff920008e3da8 R14: ffffffff8dba7c60 R15: dffffc0000000000 rcu_read_lock include/linux/rcupdate.h:842 [inline] trace_call_bpf+0xfb/0x850 kernel/trace/bpf_trace.c:145 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891 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:5834 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] percpu_ref_tryget_many include/linux/percpu-refcount.h:241 [inline] percpu_ref_tryget+0x31/0x180 include/linux/percpu-refcount.h:266 css_tryget include/linux/cgroup_refcnt.h:45 [inline] get_mem_cgroup_from_mm+0x102/0x2a0 mm/memcontrol.c:944 __mem_cgroup_charge+0x15/0x80 mm/memcontrol.c:4786 mem_cgroup_charge include/linux/memcontrol.h:652 [inline] folio_prealloc+0x51/0x180 mm/memory.c:1073 wp_page_copy mm/memory.c:3569 [inline] do_wp_page+0x1231/0x5800 mm/memory.c:4030 handle_pte_fault mm/memory.c:6085 [inline] __handle_mm_fault+0x1144/0x5620 mm/memory.c:6212 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6381 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: 00 04 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 e9 4f 00 04 00 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc9000471f698 EFLAGS: 00050206 RAX: ffffffff84bf1001 RBX: ffff8880594a00e8 RCX: 000000000000c340 RDX: 0000000000000000 RSI: ffff8880594a3f78 RDI: 0000200000843000 RBP: ffffc9000471f800 R08: ffff8880594b02b7 R09: 1ffff1100b296056 R10: dffffc0000000000 R11: ffffed100b296057 R12: 1ffff920008e3fbf R13: 000020000083f170 R14: ffffc9000471fe08 R15: 00000000000101d0 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] copy_to_user_iter lib/iov_iter.c:25 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x24c/0x16f0 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:220 [inline] simple_copy_to_iter net/core/datagram.c:521 [inline] __skb_datagram_iter+0xf8/0x990 net/core/datagram.c:402 skb_copy_datagram_iter+0xc5/0x230 net/core/datagram.c:535 skb_copy_datagram_msg include/linux/skbuff.h:4132 [inline] tipc_recvstream+0x72d/0xe70 net/tipc/socket.c:2067 sock_recvmsg_nosec net/socket.c:1017 [inline] sock_recvmsg+0x229/0x270 net/socket.c:1039 ____sys_recvmsg+0x1c9/0x460 net/socket.c:2786 ___sys_recvmsg+0x1b5/0x510 net/socket.c:2828 __sys_recvmsg net/socket.c:2861 [inline] __do_sys_recvmsg net/socket.c:2867 [inline] __se_sys_recvmsg net/socket.c:2864 [inline] __x64_sys_recvmsg+0x198/0x260 net/socket.c:2864 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: 0033:0x7fd8d0f8e929 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:00007fd8d1ed5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fd8d11b5fa0 RCX: 00007fd8d0f8e929 RDX: 0000000000001f00 RSI: 0000200000000500 RDI: 000000000000000a RBP: 00007fd8d1010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd8d11b5fa0 R15: 00007ffd313571c8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 3398 Comm: kworker/R-bat_e Not tainted 6.16.0-rc3-syzkaller-ge34a79b96ab9 #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:put_recursion_context kernel/events/internal.h:229 [inline] RIP: 0010:perf_swevent_put_recursion_context kernel/events/core.c:10583 [inline] RIP: 0010:perf_trace_run_bpf_submit+0x117/0x170 kernel/events/core.c:10892 Code: 00 48 83 c4 20 eb 38 e8 67 0a d0 ff eb 05 e8 60 0a d0 ff 65 48 8b 04 25 08 00 9d 92 0f b6 cb 48 8d 1c 08 48 81 c3 2c 14 00 00 <48> 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 75 30 fe 0b 48 83 c4 10 5b RSP: 0018:ffffc90000a088a8 EFLAGS: 00000086 RAX: ffff888031201e00 RBX: ffff88803120322d RCX: 0000000000000001 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffc90000a0882f R09: 0000000000000000 R10: ffffc90000a08820 R11: ffffffffa0202f8c R12: ffffe8ffffd77cc0 R13: ffffffff8e1a0540 R14: ffff8880b8732a08 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff44b2ff7c CR3: 000000007dc4e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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 seqcount_lockdep_reader_access+0xe8/0x1c0 include/linux/seqlock.h:71 ktime_get_with_offset+0x8c/0x2a0 kernel/time/timekeeping.c:819 ktime_get_real include/linux/timekeeping.h:87 [inline] mac80211_hwsim_get_tsf_raw drivers/net/wireless/virtual/mac80211_hwsim.c:1208 [inline] __mac80211_hwsim_beacon_tx+0x2b8/0x6b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2257 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323 __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+0x286/0x870 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline] RIP: 0010:__local_bh_enable_ip+0x135/0x1c0 kernel/softirq.c:414 Code: 8b e8 7f 41 e1 09 65 66 8b 05 af 6e 17 11 66 85 c0 75 5a bf 01 00 00 00 e8 a8 32 0b 00 e8 f3 48 42 00 fb 65 8b 05 8b 6e 17 11 <85> c0 75 05 e8 c2 04 ae ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00 RSP: 0018:ffffc9000c7278c0 EFLAGS: 00000282 RAX: 0000000080000000 RBX: 0000000000000201 RCX: 3d137c06ea6f1c00 RDX: 0000000000000006 RSI: ffffffff8d982385 RDI: ffffffff8be28d40 RBP: ffffc9000c727958 R08: ffffffff8fa10cf7 R09: 1ffffffff1f4219e R10: dffffc0000000000 R11: fffffbfff1f4219f R12: ffffffff8b34ef68 R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff920018e4f18 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+0x369/0x610 net/batman-adv/network-coding.c:722 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 rescuer_thread+0x53c/0xdd0 kernel/workqueue.c:3498 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245