INFO: task kworker/0:0:25909 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-00136-gc8a5c731fd12 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack:22672 pid:25909 tgid:25909 ppid:2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752
addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4686
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Showing all locks held in the system:
2 locks held by init/1:
1 lock held by khungtaskd/30:
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:3/49:
2 locks held by kswapd0/86:
1 lock held by kswapd1/87:
1 lock held by jbd2/sda1-8/4487:
3 locks held by udevd/4524:
3 locks held by dhcpcd/4737:
2 locks held by getty/4831:
#0: ffff888029b7d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-fuzzer/5065:
2 locks held by syz-fuzzer/5067:
2 locks held by syz-fuzzer/5099:
2 locks held by kworker/u4:0/11943:
2 locks held by syz-executor.1/17531:
3 locks held by kworker/0:0/25909:
#0: ffff88802992a538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff88802992a538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc9000979fd20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc9000979fd20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4686
3 locks held by kworker/1:1/9390:
#0: ffff88802992a538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff88802992a538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc900037c7d20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc900037c7d20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4686
2 locks held by syz-executor.1/14135:
2 locks held by syz-executor.1/14145:
1 lock held by syz-executor.2/14146:
#0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3506
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.8.0-rc7-syzkaller-00136-gc8a5c731fd12 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4524 Comm: udevd Not tainted 6.8.0-rc7-syzkaller-00136-gc8a5c731fd12 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:zs_can_compact mm/zsmalloc.c:1985 [inline]
RIP: 0010:zs_shrinker_count+0x133/0x200 mm/zsmalloc.c:2117
Code: bc 24 c4 00 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 84 00 00 00 49 63 8c 24 c4 00 00 00 4c 89 e8 31 d2 48 f7 f1 <49> 89 c5 49 81 c4 c8 00 00 00 4c 89 e0 48 c1 e8 03 42 0f b6 04 30
RSP: 0000:ffffc90003186888 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000011
RDX: 000000000000000d RSI: 0000000000000004 RDI: ffff88802e9fb8c4
RBP: 000000000000002b R08: ffffffff8200d88d R09: 1ffffffff1f0ad85
R10: dffffc0000000000 R11: ffffffff8200d790 R12: ffff88802e9fb800
R13: 000000000000000d R14: dffffc0000000000 R15: ffff88802e8a0160
FS: 00007f48b30b9c80(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000471fe0 CR3: 000000002417c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_shrink_slab+0x82/0x1140 mm/shrinker.c:382
shrink_slab+0x1092/0x14d0 mm/shrinker.c:662
shrink_one+0x423/0x7e0 mm/vmscan.c:4767
shrink_many mm/vmscan.c:4828 [inline]
lru_gen_shrink_node mm/vmscan.c:4929 [inline]
shrink_node+0x375e/0x3e20 mm/vmscan.c:5888
shrink_zones mm/vmscan.c:6141 [inline]
do_try_to_free_pages+0x7f7/0x1bb0 mm/vmscan.c:6203
try_to_free_pages+0x451/0xff0 mm/vmscan.c:6438
__perform_reclaim mm/page_alloc.c:3768 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:3790 [inline]
__alloc_pages_slowpath+0xdd5/0x2400 mm/page_alloc.c:4195
__alloc_pages+0x417/0x680 mm/page_alloc.c:4580
alloc_pages_mpol+0x3de/0x650 mm/mempolicy.c:2133
alloc_pages mm/mempolicy.c:2204 [inline]
folio_alloc+0x12a/0x330 mm/mempolicy.c:2211
filemap_alloc_folio+0xde/0x500 mm/filemap.c:975
__filemap_get_folio+0x431/0xbc0 mm/filemap.c:1919
filemap_fault+0xb10/0x1680 mm/filemap.c:3255
__do_fault+0x135/0x460 mm/memory.c:4396
do_read_fault mm/memory.c:4758 [inline]
do_fault mm/memory.c:4888 [inline]
do_pte_missing mm/memory.c:3745 [inline]
handle_pte_fault mm/memory.c:5164 [inline]
__handle_mm_fault+0x49e6/0x72d0 mm/memory.c:5305
handle_mm_fault+0x3c1/0x8a0 mm/memory.c:5470
do_user_addr_fault arch/x86/mm/fault.c:1355 [inline]
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x456/0x870 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f48b2d23457
Code: Unable to access opcode bytes at 0x7f48b2d2342d.
RSP: 002b:00007ffea4426e88 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 00007ffea4426f88 RCX: 00007f48b2d23457
RDX: 0000000000000008 RSI: 00007ffea4426f88 RDI: 000000000000000b
RBP: 000055f649475b00 R08: 0000000000000007 R09: f634c7b0c9949c53
R10: 00000000ffffffff R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
SLUB: Unable to allocate memory on node -1, gfp=0x820(GFP_ATOMIC)
cache: skbuff_head_cache, object size: 240, buffer size: 320, default order: 0, min order: 0
node 0: slabs: 4471, objs: 53652, free: 0
node 1: slabs: 397, objs: 4764, free: 18
SLUB: Unable to allocate memory on node -1, gfp=0x820(GFP_ATOMIC)
cache: skbuff_head_cache, object size: 240, buffer size: 320, default order: 0, min order: 0
node 0: slabs: 4472, objs: 53664, free: 0
node 1: slabs: 397, objs: 4764, free: 18