INFO: task syz.0.224:1053 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.224 state:D stack:0 pid:1053 tgid:1052 ppid:295 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:6027 [inline]
__schedule+0x14ce/0x2100 kernel/sched/core.c:7894
__schedule_loop kernel/sched/core.c:7975 [inline]
schedule+0xc5/0x240 kernel/sched/core.c:7990
super_lock+0x168/0x330 fs/super.c:117
super_lock_shared fs/super.c:142 [inline]
iterate_supers+0x8a/0x560 fs/super.c:937
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:939 [inline]
__se_sys_quotactl+0x34e/0x7e0 fs/quota/quota.c:918
__x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7faae999ce59
RSP: 002b:00007faaea7b5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007faae9c15fa0 RCX: 00007faae999ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007faae9a32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faae9c16038 R14: 00007faae9c15fa0 R15: 00007fff5cf50d58
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2ba/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xdad/0xf00 kernel/hung_task.c:423
kthread+0x2c9/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 525 Comm: kworker/0:4 Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: mld mld_dad_work
RIP: 0010:check_region_inline mm/kasan/generic.c:174 [inline]
RIP: 0010:kasan_check_range+0x30/0x2b0 mm/kasan/generic.c:189
Code: 48 85 f6 0f 84 c0 01 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 4c 8d 04 37 49 39 f8 0f 82 29 02 00 00 49 89 f9 49 c1 e9 2f <41> 81 f9 ff ff 01 00 0f 82 15 02 00 00 49 89 ff 49 c1 ef 03 49 ba
RSP: 0018:ffffc90000006fc8 EFLAGS: 00000a06
RAX: 0000000000000001 RBX: 0000000000000058 RCX: ffffffff847e55c8
RDX: 0000000000000001 RSI: 0000000000000058 RDI: ffff88815279a6c0
RBP: ffffc90000006ff0 R08: ffff88815279a718 R09: 000000000001ffff
R10: dffffc0000000000 R11: ffffed102a4f3443 R12: 0000000000000000
R13: ffffffff847e55c8 R14: ffff88815279a1c0 R15: ffff88815279a6c0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000010c7be000 CR4: 00000000003526b0
DR0: 000000000000002a DR1: ffffffffff7fff00 DR2: 0000000080000001
DR3: 0000000000000005 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__asan_memcpy+0x48/0x80 mm/kasan/shadow.c:106
__copy_skb_header+0x3a8/0x4e0 net/core/skbuff.c:1541
__skb_clone+0x64/0x7a0 net/core/skbuff.c:1583
skb_clone+0x260/0x460 net/core/skbuff.c:2089
dev_queue_xmit_nit+0x1ad/0xae0 net/core/dev.c:2393
xmit_one net/core/dev.c:3686 [inline]
dev_hard_start_xmit+0x187/0x760 net/core/dev.c:3709
__dev_queue_xmit+0x1927/0x3680 net/core/dev.c:4549
dev_queue_xmit include/linux/netdevice.h:3141 [inline]
br_dev_queue_push_xmit+0x55c/0x700 net/bridge/br_forward.c:53
NF_HOOK include/linux/netfilter.h:317 [inline]
br_forward_finish net/bridge/br_forward.c:66 [inline]
NF_HOOK include/linux/netfilter.h:317 [inline]
__br_forward+0x25c/0x390 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver net/bridge/br_forward.c:191 [inline]
br_flood+0x50e/0x730 net/bridge/br_forward.c:237
br_handle_frame_finish+0x11eb/0x17a0 net/bridge/br_input.c:215
nf_hook_bridge_pre net/bridge/br_input.c:301 [inline]
br_handle_frame+0x5a6/0xba0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xfae/0x3ab0 net/core/dev.c:5695
__netif_receive_skb_one_core net/core/dev.c:5799 [inline]
__netif_receive_skb net/core/dev.c:5914 [inline]
process_backlog+0x3e5/0xad0 net/core/dev.c:6250
__napi_poll+0xd0/0x610 net/core/dev.c:6901
napi_poll net/core/dev.c:6970 [inline]
net_rx_action+0x5ea/0xd80 net/core/dev.c:7092
handle_softirqs+0x1aa/0x630 kernel/softirq.c:621
__do_softirq+0xf/0x16 kernel/softirq.c:659
do_softirq+0xb8/0x110 kernel/softirq.c:503
__local_bh_enable_ip+0x74/0x80 kernel/softirq.c:430
local_bh_enable include/linux/bottom_half.h:33 [inline]
ip6t_do_table+0x130c/0x14d0 net/ipv6/netfilter/ip6_tables.c:375
ip6t_mangle_out net/ipv6/netfilter/ip6table_mangle.c:49 [inline]
ip6table_mangle_hook+0x26d/0x730 net/ipv6/netfilter/ip6table_mangle.c:72
nf_hook_entry_hookfn include/linux/netfilter.h:155 [inline]
nf_hook_slow+0xd5/0x240 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:272 [inline]
NF_HOOK include/linux/netfilter.h:315 [inline]
mld_sendpack+0xcd5/0xd50 net/ipv6/mcast.c:1824
mld_send_initial_cr+0x1c0/0x320 net/ipv6/mcast.c:2241
mld_dad_work+0x43/0x4e0 net/ipv6/mcast.c:2264
process_one_work kernel/workqueue.c:3261 [inline]
process_scheduled_works+0x7d4/0x1020 kernel/workqueue.c:3342
worker_thread+0xc51/0x1370 kernel/workqueue.c:3423
kthread+0x2c9/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244