Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: lSep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL deviceSep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpc[ 503.870550][ T30] INFO: task syz.1.381:7442 blocked for more than 143 seconds. d[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 [ 503.909433][ T4657] audit: audit_backlog=66 > audit_backlog_limit=64 syzkaller daemon.err dhcpcd[4889[ 503.926801][ T30] Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0 ]: libudev: rece[ 503.935324][ T29] audit: type=1400 audit(1727191272.826:31233): avc: denied { read } for pid=4657 comm="syslogd" name="log" dev="sda1" ino=1915 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=0 ived NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkal[ 503.990000][ T4889] audit: audit_lost=244 audit_rate_limit=0 audit_backlog_limit=64 ler daemon.err dhcpcd[4889]: libudev: received NULL device Sep [ 504.003507][ T4889] audit: backlog limit exceeded 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: re[ 504.034351][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. ceived NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkal[ 504.067514][ T4657] audit: audit_lost=245 audit_rate_limit=0 audit_backlog_limit=64 ler daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889[ 504.123893][ T7193] audit: audit_backlog=65 > audit_backlog_limit=64 ]: libudev: rece[ 504.131855][ T7193] audit: audit_lost=246 audit_rate_limit=0 audit_backlog_limit=64 Sep 24 15:21:12 [ 504.135353][ T7514] audit: audit_backlog=65 > audit_backlog_limit=64 Sep 24 15:21:12 Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 1[ 504.178317][ T30] Call Trace: 5:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: l[ 504.199211][ T30] ibudev: received[ 504.203522][ T30] context_switch kernel/sched/core.c:5188 [inline] ibudev: received[ 504.203522][ T30] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:1[ 504.224885][ T30] ? __pfx___lock_acquire+0x10/0x10 kernel/locking/lockdep.c:4339 2 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpc[ 504.247155][ T30] ? instrument_atomic_read include/linux/instrumented.h:68 [inline] Sep 24 15:21:12 syzkaller daemon.err dhcpc[ 504.247155][ T30] ? _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] Sep 24 15:21:12 syzkaller daemon.err dhcpc[ 504.247155][ T30] ? hlock_class+0x4e/0x130 kernel/locking/lockdep.c:227 d[4889]: libudevSep 24 15:21:12 [ 504.255515][ T30] ? mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4655 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daem[ 504.267688][ T30] ? __pfx___lock_acquire+0x10/0x10 kernel/locking/lockdep.c:4339 on.err dhcpcd[48[ 504.273844][ T30] ? __pfx___schedule+0x10/0x10 89]: libudev: reSep 24 15:21:12 [ 504.282255][ T30] ? sched_submit_work kernel/sched/core.c:6587 [inline] 89]: libudev: reSep 24 15:21:12 [ 504.282255][ T30] ? schedule+0x298/0x350 kernel/sched/core.c:6620 Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: receSep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 syzkaller kern.notice kernel: [ 503.725455][ T29] audit: type[ 504.301562][ T30] ? __pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5280 =1400 audit(1727[ 504.307222][ T30] ? rwsem_down_read_slowpath+0x2c4/0xb20 kernel/locking/rwsem.c:1064 191272.796:31232): avc: denied { read } for pid=4889 comm="dhcpcd" scontext=sSep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: Sep 24 15:21:12 Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daem[ 504.351467][ T30] __schedule_loop kernel/sched/core.c:6606 [inline] Sep 24 15:21:12 syzkaller daem[ 504.351467][ T30] schedule+0xe7/0x350 kernel/sched/core.c:6621 on.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[[ 504.363878][ T30] schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev[ 504.377838][ T30] rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086 : received NULL [ 504.384174][ T30] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24Sep 24 15:21:12 Sep 24 15:21:12 Sep 24 15:21:12 [ 504.403419][ T30] ? __pfx___might_resched+0x10/0x10 kernel/sched/core.c:5685 syzkaller daemon.err dhcpcd[4889[ 504.409413][ T30] __down_read_common kernel/locking/rwsem.c:1250 [inline] syzkaller daemon.err dhcpcd[4889[ 504.409413][ T30] __down_read kernel/locking/rwsem.c:1263 [inline] syzkaller daemon.err dhcpcd[4889[ 504.409413][ T30] down_read+0x124/0x330 kernel/locking/rwsem.c:1528 ]: libudev: rece[ 504.409449][ T30] ? __pfx_down_read+0x10/0x10 ived NULL device[ 504.409491][ T30] filemap_invalidate_lock_shared include/linux/fs.h:870 [inline] ived NULL device[ 504.409491][ T30] page_cache_ra_unbounded+0x12b/0x5a0 mm/readahead.c:225 Sep 24 15:21:1[ 504.409531][ T30] ? find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:5249 2 syzkaller daem[ 504.409572][ T30] do_page_cache_ra mm/readahead.c:303 [inline] 2 syzkaller daem[ 504.409572][ T30] page_cache_ra_order+0x6b5/0xb80 mm/readahead.c:488 on.err dhcpcd[48[ 504.409628][ T30] page_cache_sync_ra+0x4b4/0x9c0 mm/readahead.c:576 89]: libudev: re[ 504.409673][ T30] page_cache_sync_readahead include/linux/pagemap.h:1298 [inline] 89]: libudev: re[ 504.409673][ T30] filemap_get_pages+0xbfb/0x1830 mm/filemap.c:2529 ceived NULL devi[ 504.409720][ T30] ? __pfx_filemap_get_pages+0x10/0x10 arch/x86/include/asm/bitops.h:206 ce Sep 24 15:21[ 504.409759][ T30] ? __pfx___might_resched+0x10/0x10 kernel/sched/core.c:5685 :12 syzkaller da[ 504.409786][ T30] ? stack_depot_save_flags+0x31b/0x8f0 lib/stackdepot.c:662 emon.err dhcpcd[[ 504.409830][ T30] filemap_read+0x3a9/0xd00 mm/filemap.c:2625 4889]: libudev: [ 504.409857][ T30] ? kasan_save_stack+0x42/0x60 mm/kasan/common.c:48 received NULL de[ 504.410013][ T30] ? kasan_kmalloc include/linux/kasan.h:211 [inline] received NULL de[ 504.410013][ T30] ? __do_kmalloc_node mm/slub.c:4159 [inline] received NULL de[ 504.410013][ T30] ? __kmalloc_noprof+0x1e8/0x400 mm/slub.c:4171 vice Sep 24 15:[ 504.410040][ T30] ? vfs_readv+0x19b/0x890 fs/read_write.c:1011 21:12 syzkaller [ 504.410067][ T30] ? __do_sys_preadv2 fs/read_write.c:1204 [inline] 21:12 syzkaller [ 504.410067][ T30] ? __se_sys_preadv2 fs/read_write.c:1195 [inline] 21:12 syzkaller [ 504.410067][ T30] ? __x64_sys_preadv2+0xef/0x160 fs/read_write.c:1195 daemon.err dhcpc[ 504.410110][ T30] ? __pfx_filemap_read+0x10/0x10 include/linux/list.h:156 d[4889]: libudev[ 504.410211][ T30] do_iter_readv_writev+0x61a/0x800 fs/read_write.c:832 : received NULL [ 504.410268][ T30] ? avc_policy_seqno+0x9/0x20 security/selinux/avc.c:1200 device Sep 24 1[ 504.410303][ T30] ? bpf_lsm_file_permission+0x9/0x10 include/linux/lsm_hook_defs.h:187 5:21:12 syzkalle[ 504.410339][ T30] ? security_file_permission+0x71/0x210 security/security.c:2839 r daemon.err dhc[ 504.410384][ T30] vfs_readv+0x4cf/0x890 fs/read_write.c:1025 pcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 sy[ 504.578512][ T30] ? __pfx_vfs_readv+0x10/0x10 include/linux/fsnotify.h:93 zkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: [ 504.608649][ T30] ? find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:5249 received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev[ 504.619918][ T30] ? __pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5280 : received NULL [ 504.625790][ T30] ? kasan_slab_free include/linux/kasan.h:184 [inline] : received NULL [ 504.625790][ T30] ? slab_free_hook mm/slub.c:2250 [inline] : received NULL [ 504.625790][ T30] ? slab_free mm/slub.c:4474 [inline] : received NULL [ 504.625790][ T30] ? kmem_cache_free+0x12f/0x3a0 mm/slub.c:4549 device Sep 24 15:21:12 syzkalle[ 504.633627][ T30] ? do_preadv+0x1b2/0x260 fs/read_write.c:1142 r daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: libudev: received NULL device Sep 24 15:21:12 syzkaller daemon.err dhcpcd[4889]: l[ 504.655217][ T30] do_preadv+0x1b2/0x260 fs/read_write.c:1142 ibudev: received NULL device Sep 24 15:21:13 syzkaller kern.err kernel: [ 503.870550][ T30] [ 504.667225][ T30] ? __pfx_do_preadv+0x10/0x10 fs/read_write.c:1089 INFO: task syz.1.381:7442 blocked for more than [ 504.677315][ T30] ? xstate_op_valid arch/x86/kernel/fpu/xstate.c:1422 [inline] INFO: task syz.1.381:7442 blocked for more than [ 504.677315][ T30] ? xfd_validate_state+0x5d/0x180 arch/x86/kernel/fpu/xstate.c:1466 143 seconds. Sep 24 15:21:13 syzkaller kern.warn kernel: [ 503[ 504.683472][ T30] __do_sys_preadv2 fs/read_write.c:1204 [inline] Sep 24 15:21:13 syzkaller kern.warn kernel: [ 503[ 504.683472][ T30] __se_sys_preadv2 fs/read_write.c:1195 [inline] Sep 24 15:21:13 syzkaller kern.warn kernel: [ 503[ 504.683472][ T30] __x64_sys_preadv2+0xef/0x160 fs/read_write.c:1195