Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudDec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller da[ 103.547476][ T113] emon.err dhcpcd[[ 103.550158][ T113] WARNING: possible circular locking dependency detected 5647]: libudev: [ 103.552342][ T113] 6.13.0-rc2-syzkaller-g2d8308bf5b67 #0 Not tainted received NULL de[ 103.557769][ T113] kswapd0/113 is trying to acquire lock: vice Dec 15 01:[ 103.559623][ T113] ffff8880265abb58 (&q->q_usage_counter(io)#68){++++}-{0:0}, at: __submit_bio+0x384/0x540 block/blk-core.c:629 45:32 syzkaller [ 103.562586][ T113] daemon.err dhcpc[ 103.562590][ T113] ffffffff8e350380 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0xcd9/0x18f0 mm/vmscan.c:6990 d[5647]: libudev[ 103.567608][ T113] : received NULL [ 103.572973][ T113] device Dec 15 01:45:32 syzkalle[ 103.575229][ T113] __fs_reclaim_acquire mm/page_alloc.c:3851 [inline] Dec 15 01:45:32 syzkalle[ 103.575229][ T113] fs_reclaim_acquire+0x102/0x150 mm/page_alloc.c:3865 r daemon.err dhc[ 103.575258][ T113] __kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:650 pcd[5647]: libud[ 103.575278][ T113] scsi_realloc_sdev_budget_map+0x2c7/0x610 drivers/scsi/scsi_scan.c:246 ev: received NUL[ 103.575306][ T113] scsi_probe_and_add_lun+0x4fa/0xda0 drivers/scsi/scsi_scan.c:1287 L device Dec 15[ 103.575333][ T113] ata_scsi_scan_host+0x215/0x780 drivers/ata/libata-scsi.c:4575 01:45:32 syzkal[ 103.575356][ T113] process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 ler daemon.err d[ 103.575376][ T113] kthread+0x2c1/0x3a0 kernel/kthread.c:389 hcpcd[5647]: lib[ 103.575388][ T113] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 udev: received N[ 103.575411][ T113] ULL device Dec [ 103.575428][ T113] check_prev_add kernel/locking/lockdep.c:3161 [inline] Dec [ 103.575428][ T113] check_prevs_add kernel/locking/lockdep.c:3280 [inline] Dec [ 103.575428][ T113] validate_chain kernel/locking/lockdep.c:3904 [inline] Dec [ 103.575428][ T113] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 15 01:45:32 syzk[ 103.575438][ T113] lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 aller daemon.err[ 103.575448][ T113] bio_queue_enter block/blk.h:75 [inline] aller daemon.err[ 103.575448][ T113] blk_mq_submit_bio+0x1fb6/0x24c0 block/blk-mq.c:3090 dhcpcd[5647]: l[ 103.575458][ T113] __submit_bio+0x384/0x540 block/blk-core.c:629 ibudev: received[ 103.575466][ T113] __submit_bio_noacct_mq block/blk-core.c:710 [inline] ibudev: received[ 103.575466][ T113] submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739 Dec 15 01:45:32 [ 103.575474][ T113] submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868 syzkaller daemon[ 103.575482][ T113] swap_writepage_bdev_async mm/page_io.c:451 [inline] syzkaller daemon[ 103.575482][ T113] __swap_writepage+0x3a3/0xf50 mm/page_io.c:474 .err dhcpcd[5647[ 103.575496][ T113] swap_writepage+0x403/0x1120 mm/page_io.c:289 ]: libudev: rece[ 103.575509][ T113] shmem_writepage+0xf8f/0x14b0 mm/shmem.c:1575 ived NULL device[ 103.575522][ T113] pageout+0x3b2/0xaa0 mm/vmscan.c:689 Dec 15 01:45:3[ 103.575534][ T113] shrink_folio_list+0x3025/0x42d0 mm/vmscan.c:1367 2 syzkaller daem[ 103.575547][ T113] evict_folios+0x6e3/0x19c0 mm/vmscan.c:4593 on.err dhcpcd[56[ 103.575559][ T113] try_to_shrink_lruvec+0x61e/0xa80 mm/vmscan.c:4789 47]: libudev: re[ 103.575572][ T113] shrink_one+0x3e3/0x7b0 mm/vmscan.c:4834 ceived NULL devi[ 103.575585][ T113] shrink_many mm/vmscan.c:4897 [inline] ceived NULL devi[ 103.575585][ T113] lru_gen_shrink_node mm/vmscan.c:4975 [inline] ceived NULL devi[ 103.575585][ T113] shrink_node+0x2763/0x3e60 mm/vmscan.c:5956 ce Dec 15 01:45[ 103.575598][ T113] kswapd_shrink_node mm/vmscan.c:6785 [inline] Dec 15 01:45[ 103.575598][ T113] balance_pgdat+0xc1f/0x18f0 mm/vmscan.c:6977 :32 syzkaller da[ 103.575612][ T113] kswapd+0x605/0xc00 mm/vmscan.c:7246 emon.err dhcpcd[[ 103.575619][ T113] kthread+0x2c1/0x3a0 kernel/kthread.c:389 5647]: libudev: [ 103.575630][ T113] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 received NULL de[ 103.575639][ T113] ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 vice Dec 15 01:[ 103.575652][ T113] 45:32 syzkaller [ 103.575655][ T113] Possible unsafe locking scenario: daemon.err dhcpc[ 103.575660][ T113] ---- ---- d[5647]: libudev[ 103.575662][ T113] lock(fs_reclaim); : received NULL [ 103.575668][ T113] lock(&q->q_usage_counter(io)#68); device Dec 15 0[ 103.575678][ T113] lock(fs_reclaim); 1:45:32 syzkalle[ 103.575684][ T113] rlock(&q->q_usage_counter(io)#68); r daemon.err dhc[ 103.575693][ T113] pcd[5647]: libud[ 103.575695][ T113] 1 lock held by kswapd0/113: ev: received NUL[ 103.575701][ T113] #0: ffffffff8e350380 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0xcd9/0x18f0 mm/vmscan.c:6990 L device Dec 15[ 103.575729][ T113] 01:45:32 syzkal[ 103.575732][ T113] CPU: 2 UID: 0 PID: 113 Comm: kswapd0 Not tainted 6.13.0-rc2-syzkaller-g2d8308bf5b67 #0 ler daemon.err d[ 103.575744][ T113] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 hcpcd[5647]: lib[ 103.575750][ T113] Call Trace: udev: received N[ 103.575754][ T113] ULL device Dec [ 103.575758][ T113] __dump_stack lib/dump_stack.c:94 [inline] Dec [ 103.575758][ T113] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 15 01:45:32 syzk[ 103.575772][ T113] print_circular_bug+0x419/0x5d0 kernel/locking/lockdep.c:2074 aller daemon.err[ 103.575783][ T113] check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206 dhcpcd[5647]: l[ 103.575793][ T113] ? __pfx_check_noncircular+0x10/0x10 kernel/locking/lockdep.c:1933 ibudev: received[ 103.575803][ T113] ? mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4727 NULL device De[ 103.575812][ T113] ? __pfx___lock_acquire+0x10/0x10 kernel/locking/lockdep.c:4387 c 15 01:45:32 sy[ 103.575824][ T113] ? instrument_atomic_read_write include/linux/instrumented.h:96 [inline] c 15 01:45:32 sy[ 103.575824][ T113] ? atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1301 [inline] c 15 01:45:32 sy[ 103.575824][ T113] ? queued_spin_lock include/asm-generic/qspinlock.h:111 [inline] c 15 01:45:32 sy[ 103.575824][ T113] ? lockdep_lock+0xc6/0x200 kernel/locking/lockdep.c:144 zkaller daemon.e[ 103.575838][ T113] ? __pfx_lockdep_lock+0x10/0x10 kernel/locking/lockdep.c:2088 rr dhcpcd[5647]:[ 103.575851][ T113] ? lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 libudev: receiv[ 103.575862][ T113] check_prev_add kernel/locking/lockdep.c:3161 [inline] libudev: receiv[ 103.575862][ T113] check_prevs_add kernel/locking/lockdep.c:3280 [inline] libudev: receiv[ 103.575862][ T113] validate_chain kernel/locking/lockdep.c:3904 [inline] libudev: receiv[ 103.575862][ T113] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 Dec 15 01:45:32 [ 103.575874][ T113] ? __pfx___lock_acquire+0x10/0x10 kernel/locking/lockdep.c:4387 syzkaller daemon[ 103.575884][ T113] ? instrument_atomic_read include/linux/instrumented.h:68 [inline] syzkaller daemon[ 103.575884][ T113] ? _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] syzkaller daemon[ 103.575884][ T113] ? hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228 .err dhcpcd[5647[ 103.575897][ T113] ? mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4727 ]: libudev: rece[ 103.575908][ T113] lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 ived NULL device[ 103.575919][ T113] ? __submit_bio+0x384/0x540 block/blk-core.c:629 Dec 15 01:45:3[ 103.575928][ T113] ? __pfx_lock_acquire.part.0+0x10/0x10 kernel/locking/lockdep.c:122 2 syzkaller daem[ 103.575939][ T113] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] 2 syzkaller daem[ 103.575939][ T113] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:737 on.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL de[ 103.701057][ T113] ? trace_lock_acquire+0x14e/0x1f0 include/trace/events/lock.h:24 vice Dec 15 01:[ 103.701081][ T113] ? __submit_bio+0x384/0x540 block/blk-core.c:629 45:32 syzkaller [ 103.701091][ T113] ? lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5820 daemon.err dhcpc[ 103.701111][ T113] bio_queue_enter block/blk.h:75 [inline] daemon.err dhcpc[ 103.701111][ T113] blk_mq_submit_bio+0x1fb6/0x24c0 block/blk-mq.c:3090 d[5647]: libudev[ 103.701121][ T113] ? __submit_bio+0x384/0x540 block/blk-core.c:629 : received NULL [ 103.701131][ T113] ? __pfx_blk_mq_submit_bio+0x10/0x10 include/linux/blkdev.h:902 device Dec 15 0[ 103.701141][ T113] ? __pfx_mark_lock+0x10/0x10 kernel/locking/lockdep.c:232 1:45:32 syzkalle[ 103.701153][ T113] __submit_bio+0x384/0x540 block/blk-core.c:629 r daemon.err dhc[ 103.701162][ T113] ? __pfx___submit_bio+0x10/0x10 block/blk-core.c:1241 pcd[5647]: libud[ 103.701172][ T113] ? seqcount_lockdep_reader_access include/linux/seqlock.h:74 [inline] pcd[5647]: libud[ 103.701172][ T113] ? ktime_get+0x206/0x300 kernel/time/timekeeping.c:811 ev: received NUL[ 103.701182][ T113] ? lockdep_hardirqs_on+0x7c/0x110 kernel/locking/lockdep.c:4468 L device Dec 15[ 103.701195][ T113] ? __submit_bio_noacct_mq block/blk-core.c:710 [inline] Dec 15[ 103.701195][ T113] ? submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739 01:45:32 syzkal[ 103.701204][ T113] __submit_bio_noacct_mq block/blk-core.c:710 [inline] 01:45:32 syzkal[ 103.701204][ T113] submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739 ler daemon.err d[ 103.701214][ T113] ? __pfx_submit_bio_noacct_nocheck+0x10/0x10 block/blk-core.c:1241 hcpcd[5647]: lib[ 103.701224][ T113] ? __pfx___might_resched+0x10/0x10 kernel/sched/core.c:5880 udev: received N[ 103.701237][ T113] ? __pfx___folio_start_writeback+0x10/0x10 mm/page-writeback.c:2165 ULL device Dec [ 103.701251][ T113] submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868 15 01:45:32 syzk[ 103.701261][ T113] swap_writepage_bdev_async mm/page_io.c:451 [inline] 15 01:45:32 syzk[ 103.701261][ T113] __swap_writepage+0x3a3/0xf50 mm/page_io.c:474 aller daemon.err dhcpcd[5647]: lDec 15 01:45:32 [ 103.701276][ T113] ? __pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5370 syzkaller daemon.err dhcpcd[5647[ 103.701287][ T113] swap_writepage+0x403/0x1120 mm/page_io.c:289 Dec 15 01:45:32 [ 103.701303][ T113] shmem_writepage+0xf8f/0x14b0 mm/shmem.c:1575 syzkaller daemon[ 103.701317][ T113] ? __pfx_shmem_writepage+0x10/0x10 mm/shmem.c:1359 .err dhcpcd[5647[ 103.701332][ T113] ? inode_to_bdi+0x9e/0x160 mm/backing-dev.c:1210 ]: libudev: rece[ 103.701342][ T113] ? arch_test_and_clear_bit arch/x86/include/asm/bitops.h:161 [inline] ]: libudev: rece[ 103.701342][ T113] ? test_and_clear_bit include/asm-generic/bitops/instrumented-atomic.h:86 [inline] ]: libudev: rece[ 103.701342][ T113] ? folio_test_clear_dirty include/linux/page-flags.h:514 [inline] ]: libudev: rece[ 103.701342][ T113] ? folio_clear_dirty_for_io+0x112/0x800 mm/page-writeback.c:3054 ived NULL device[ 103.701356][ T113] pageout+0x3b2/0xaa0 mm/vmscan.c:689 Dec 15 01:45:32 [ 103.701370][ T113] ? __pfx_pageout+0x10/0x10 arch/x86/include/asm/atomic.h:23 syzkaller daemon[ 103.701387][ T113] ? __pfx_folio_referenced_one+0x10/0x10 include/linux/page-flags.h:689 .err dhcpcd[5647[ 103.701398][ T113] ? __pfx_folio_lock_anon_vma_read+0x10/0x10 arch/x86/include/asm/atomic.h:23 ]: libudev: rece[ 103.701410][ T113] ? __pfx_invalid_folio_referenced_vma+0x10/0x10 include/linux/page-flags.h:221 ived NULL device[ 103.701421][ T113] ? lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5820 Dec 15 01:45:3[ 103.701431][ T113] ? rcu_lock_acquire include/linux/rcupdate.h:337 [inline] Dec 15 01:45:3[ 103.701431][ T113] ? rcu_read_lock include/linux/rcupdate.h:849 [inline] Dec 15 01:45:3[ 103.701431][ T113] ? folio_evictable+0x2e/0x270 mm/internal.h:434 2 syzkaller daem[ 103.701444][ T113] shrink_folio_list+0x3025/0x42d0 mm/vmscan.c:1367 on.err dhcpcd[56[ 103.701458][ T113] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] on.err dhcpcd[56[ 103.701458][ T113] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:737 Dec 15 01:45:32 [ 103.701472][ T113] ? __pfx_shrink_folio_list+0x10/0x10 mm/vmscan.c:3367 syzkaller daemon[ 103.701486][ T113] ? scan_folios mm/vmscan.c:4459 [inline] syzkaller daemon[ 103.701486][ T113] ? isolate_folios+0x1c57/0x3830 mm/vmscan.c:4550 .err dhcpcd[5647[ 103.701501][ T113] ? instrument_atomic_read include/linux/instrumented.h:68 [inline] .err dhcpcd[5647[ 103.701501][ T113] ? _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] .err dhcpcd[5647[ 103.701501][ T113] ? hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228 ]: libudev: rece[ 103.701527][ T113] ? mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4321 ived NULL device[ 103.701538][ T113] evict_folios+0x6e3/0x19c0 mm/vmscan.c:4593 Dec 15 01:45:3[ 103.701553][ T113] ? __pfx_evict_folios+0x10/0x10 include/trace/events/vmscan.h:349 2 syzkaller daem[ 103.701569][ T113] ? instrument_atomic_read include/linux/instrumented.h:68 [inline] 2 syzkaller daem[ 103.701569][ T113] ? atomic_long_read include/linux/atomic/atomic-instrumented.h:3188 [inline] 2 syzkaller daem[ 103.701569][ T113] ? get_nr_swap_pages include/linux/swap.h:476 [inline] 2 syzkaller daem[ 103.701569][ T113] ? mem_cgroup_get_nr_swap_pages+0x20/0x120 mm/memcontrol.c:5102 on.err dhcpcd[56[ 103.701584][ T113] ? mem_cgroup_swappiness include/linux/swap.h:629 [inline] on.err dhcpcd[56[ 103.701584][ T113] ? sc_swappiness+0xd4/0x190 mm/vmscan.c:250 47]: libudev: re[ 103.701597][ T113] try_to_shrink_lruvec+0x61e/0xa80 mm/vmscan.c:4789 ceived NULL devi[ 103.701612][ T113] ? find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:5339 ce Dec 15 01:45[ 103.701625][ T113] ? __pfx_try_to_shrink_lruvec+0x10/0x10 mm/vmscan.c:5384 :32 syzkaller da[ 103.701640][ T113] ? rcu_lock_release include/linux/rcupdate.h:347 [inline] :32 syzkaller da[ 103.701640][ T113] ? rcu_read_unlock include/linux/rcupdate.h:880 [inline] :32 syzkaller da[ 103.701640][ T113] ? shrink_many mm/vmscan.c:4895 [inline] :32 syzkaller da[ 103.701640][ T113] ? lru_gen_shrink_node mm/vmscan.c:4975 [inline] :32 syzkaller da[ 103.701640][ T113] ? shrink_node+0x2743/0x3e60 mm/vmscan.c:5956 emon.err dhcpcd[[ 103.701655][ T113] shrink_one+0x3e3/0x7b0 mm/vmscan.c:4834 5647]: libudev: [ 103.701668][ T113] ? rcu_lock_release include/linux/rcupdate.h:347 [inline] 5647]: libudev: [ 103.701668][ T113] ? rcu_read_unlock include/linux/rcupdate.h:880 [inline] 5647]: libudev: [ 103.701668][ T113] ? shrink_many mm/vmscan.c:4895 [inline] 5647]: libudev: [ 103.701668][ T113] ? lru_gen_shrink_node mm/vmscan.c:4975 [inline] 5647]: libudev: [ 103.701668][ T113] ? shrink_node+0x2743/0x3e60 mm/vmscan.c:5956 received NULL de[ 103.701683][ T113] shrink_many mm/vmscan.c:4897 [inline] received NULL de[ 103.701683][ T113] lru_gen_shrink_node mm/vmscan.c:4975 [inline] received NULL de[ 103.701683][ T113] shrink_node+0x2763/0x3e60 mm/vmscan.c:5956 vice Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULDec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL de[ 103.701698][ T113] ? rcu_lock_acquire include/linux/rcupdate.h:337 [inline] Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL de[ 103.701698][ T113] ? rcu_read_lock include/linux/rcupdate.h:849 [inline] Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL de[ 103.701698][ T113] ? shrink_many mm/vmscan.c:4872 [inline] Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL de[ 103.701698][ T113] ? lru_gen_shrink_node mm/vmscan.c:4975 [inline] Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL de[ 103.701698][ T113] ? shrink_node+0x24b0/0x3e60 mm/vmscan.c:5956 vice Dec 15 01:[ 103.701713][ T113] ? __pfx_shrink_node+0x10/0x10 include/linux/list_nulls.h:110 45:32 syzkaller [ 103.701727][ T113] ? __pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5370 daemon.err dhcpc[ 103.701737][ T113] ? rcu_lock_acquire include/linux/rcupdate.h:337 [inline] daemon.err dhcpc[ 103.701737][ T113] ? rcu_read_lock include/linux/rcupdate.h:849 [inline] daemon.err dhcpc[ 103.701737][ T113] ? percpu_ref_put_many.constprop.0+0x1b/0x150 include/linux/percpu-refcount.h:330 d[5647]: libudev[ 103.701754][ T113] ? kswapd_shrink_node mm/vmscan.c:6785 [inline] d[5647]: libudev[ 103.701754][ T113] ? balance_pgdat+0xc1f/0x18f0 mm/vmscan.c:6977 : received NULL [ 103.701768][ T113] kswapd_shrink_node mm/vmscan.c:6785 [inline] : received NULL [ 103.701768][ T113] balance_pgdat+0xc1f/0x18f0 mm/vmscan.c:6977 device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 [ 103.701783][ T113] ? __pfx_balance_pgdat+0x10/0x10 mm/vmscan.c:2356 syzkaller daemon[ 103.701798][ T113] ? __switch_to+0x749/0x1190 arch/x86/kernel/process_64.c:712 .err dhcpcd[5647[ 103.701811][ T113] ? context_switch kernel/sched/core.c:5372 [inline] .err dhcpcd[5647[ 103.701811][ T113] ? __schedule+0xe60/0x5ad0 kernel/sched/core.c:6756 ]: libudev: rece[ 103.701821][ T113] ? __pfx___lock_acquire+0x10/0x10 kernel/locking/lockdep.c:4387 ived NULL device[ 103.701835][ T113] ? __pfx___might_resched+0x10/0x10 kernel/sched/core.c:5880 Dec 15 01:45:3[ 103.701847][ T113] ? set_pgdat_percpu_threshold+0xc3/0x330 mm/vmstat.c:330 2 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzk[ 103.701862][ T113] kswapd+0x605/0xc00 mm/vmscan.c:7246 aller daemon.err[ 103.701872][ T113] ? __pfx_kswapd+0x10/0x10 mm/vmscan.c:7042 dhcpcd[5647]: l[ 103.701886][ T113] ? __pfx_autoremove_wake_function+0x10/0x10 include/linux/list.h:183 ibudev: received[ 103.701897][ T113] ? lockdep_hardirqs_on+0x7c/0x110 kernel/locking/lockdep.c:4468 NULL device De[ 103.701908][ T113] ? __kthread_parkme+0x148/0x220 kernel/kthread.c:293 c 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL deDec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:3[ 103.701922][ T113] ? __pfx_kswapd+0x10/0x10 mm/vmscan.c:7042 2 syzkaller daem[ 103.701936][ T113] kthread+0x2c1/0x3a0 kernel/kthread.c:389 on.err dhcpcd[56[ 103.701948][ T113] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] on.err dhcpcd[56[ 103.701948][ T113] ? _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 47]: libudev: re[ 103.701959][ T113] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373 ceived NULL devi[ 103.701972][ T113] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ce Dec 15 01:45:32 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller kern.warn kernel: [ 103.547476][ T113] Dec 15 01:45:33 syzkaller daemon.err dhcpcd[5647]: libudev: received NULL device Dec 15 01:45:33 syzkaller kern.warn kernel: [ 103.548262][ T113] ======================================================