[18233] 0 18233 18180 13230 32 3 0 1000 syz-executor.1 [18248] 0 18248 18180 13231 32 3 0 1000 syz-executor.3 [18344] 0 18344 18180 13231 32 3 0 1000 syz-executor.4 INFO: rcu_preempt detected stalls on CPUs/tasks: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3564 (detected by 0, t=10503 jiffies, g=8196, c=8195, q=66) [18395] 0 18395 18180 13230 32 3 0 1000 syz-executor.1 syz-executor.2 R running task 25312 3564 3562 0x00000000 Call Trace: preempt_schedule_common+0x4f/0xd0 kernel/sched/core.c:3578 ___preempt_schedule+0x16/0x18 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x3b/0x40 kernel/locking/spinlock.c:184 spin_unlock include/linux/spinlock.h:357 [inline] task_unlock include/linux/sched/task.h:136 [inline] dump_tasks mm/oom_kill.c:403 [inline] dump_header+0x7bb/0x848 mm/oom_kill.c:428 oom_kill_process.cold+0x10/0xde6 mm/oom_kill.c:861 out_of_memory mm/oom_kill.c:1084 [inline] out_of_memory+0x2d2/0xab0 mm/oom_kill.c:1023 __alloc_pages_may_oom mm/page_alloc.c:3415 [inline] __alloc_pages_slowpath mm/page_alloc.c:4112 [inline] __alloc_pages_nodemask+0x1988/0x2370 mm/page_alloc.c:4277 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] __page_cache_alloc include/linux/pagemap.h:226 [inline] pagecache_get_page+0x246/0x7e0 mm/filemap.c:1516 filemap_fault+0x8da/0x18a0 mm/filemap.c:2517 ext4_filemap_fault+0x84/0xb0 fs/ext4/inode.c:6233 __do_fault+0x100/0x380 mm/memory.c:3223 do_read_fault mm/memory.c:3633 [inline] do_fault mm/memory.c:3759 [inline] handle_pte_fault mm/memory.c:3989 [inline] __handle_mm_fault+0x9bf/0x2700 mm/memory.c:4113 handle_mm_fault+0x2f1/0x6da mm/memory.c:4150 __do_page_fault+0x477/0xbb0 arch/x86/mm/fault.c:1420 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1122 RIP: 66d66280:0x52988 RSP: 52d1e:000000000000025c EFLAGS: 00000019 syz-executor.2 R running task 25312 3564 3562 0x00000000 Call Trace: preempt_schedule_common+0x4f/0xd0 kernel/sched/core.c:3578 ___preempt_schedule+0x16/0x18 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x3b/0x40 kernel/locking/spinlock.c:184 spin_unlock include/linux/spinlock.h:357 [inline] task_unlock include/linux/sched/task.h:136 [inline] dump_tasks mm/oom_kill.c:403 [inline] dump_header+0x7bb/0x848 mm/oom_kill.c:428 oom_kill_process.cold+0x10/0xde6 mm/oom_kill.c:861 out_of_memory mm/oom_kill.c:1084 [inline] out_of_memory+0x2d2/0xab0 mm/oom_kill.c:1023 __alloc_pages_may_oom mm/page_alloc.c:3415 [inline] __alloc_pages_slowpath mm/page_alloc.c:4112 [inline] __alloc_pages_nodemask+0x1988/0x2370 mm/page_alloc.c:4277 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] __page_cache_alloc include/linux/pagemap.h:226 [inline] pagecache_get_page+0x246/0x7e0 mm/filemap.c:1516 filemap_fault+0x8da/0x18a0 mm/filemap.c:2517 ext4_filemap_fault+0x84/0xb0 fs/ext4/inode.c:6233 __do_fault+0x100/0x380 mm/memory.c:3223 do_read_fault mm/memory.c:3633 [inline] do_fault mm/memory.c:3759 [inline] handle_pte_fault mm/memory.c:3989 [inline] __handle_mm_fault+0x9bf/0x2700 mm/memory.c:4113 handle_mm_fault+0x2f1/0x6da mm/memory.c:4150 __do_page_fault+0x477/0xbb0 arch/x86/mm/fault.c:1420 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1122 RIP: 66d66280:0x52988 RSP: 52d1e:000000000000025c EFLAGS: 00000019 [18444] 0 18444 18180 13231 32 3 0 1000 syz-executor.3 [18508] 0 18508 18180 13231 32 3 0 1000 syz-executor.4 [18574] 0 18574 18180 13230 32 3 0 1000 syz-executor.1 [18606] 0 18606 18180 8772 24 3 0 1000 syz-executor.4 [18645] 0 18645 18180 13231 32 3 0 1000 syz-executor.3 [18851] 0 18851 18180 13173 32 3 0 1000 syz-executor.4 [18854] 0 18854 18180 13171 32 3 0 1000 syz-executor.1 [19072] 0 19072 18147 8711 24 3 0 1000 syz-executor.4 [19075] 0 19075 18180 8704 24 3 0 1000 syz-executor.3 [19087] 0 19087 18147 8704 24 3 0 1000 syz-executor.4 [19099] 0 19099 18180 13171 32 3 0 1000 syz-executor.1 [19108] 0 19108 18147 8704 24 3 0 1000 syz-executor.4 [19174] 0 19174 18147 8715 24 3 0 1000 syz-executor.4 [19177] 0 19177 18180 8773 24 3 0 1000 syz-executor.3 [19178] 0 19178 18180 8775 24 3 0 1000 syz-executor.1 [19183] 0 19183 18147 8715 24 3 0 1000 syz-executor.4 [19192] 0 19192 18147 8715 24 3 0 1000 syz-executor.4 [19245] 0 19245 5365 170 15 3 0 -1000 udevd [19262] 0 19262 5365 169 15 3 0 -1000 udevd [19355] 0 19355 18180 8776 24 3 0 1000 syz-executor.1 [19436] 0 19436 18147 8716 24 3 0 1000 syz-executor.3 [19442] 0 19442 18180 13186 32 3 0 1000 syz-executor.1 [19489] 0 19489 18147 8716 24 3 0 1000 syz-executor.3 [19583] 0 19583 18147 8716 24 3 0 1000 syz-executor.3 [19660] 0 19660 18147 8716 24 3 0 1000 syz-executor.3 [19664] 0 19664 18147 8716 24 3 0 1000 syz-executor.3 [19671] 0 19671 18147 8716 24 3 0 1000 syz-executor.3 [19677] 0 19677 18147 8716 24 3 0 1000 syz-executor.3 [19678] 0 19678 18213 13189 32 3 0 1000 syz-executor.2 [19686] 0 19686 18147 8726 24 3 0 1000 syz-executor.1 [19696] 0 19696 18147 8726 24 3 0 1000 syz-executor.1 [19715] 0 19715 18180 13187 32 3 0 1000 syz-executor.4 [19717] 0 19717 18147 8726 24 3 0 1000 syz-executor.1 [19823] 0 19823 5365 170 15 3 0 -1000 udevd [19826] 0 19826 5365 170 15 3 0 -1000 udevd [19976] 0 19976 5365 170 15 3 0 -1000 udevd [19985] 0 19985 18213 8941 26 4 0 1000 syz-executor.3 [19986] 0 19986 18244 13711 34 4 0 1000 syz-executor.1 [20004] 0 19989 18211 13791 33 4 0 1000 syz-executor.4 [19990] 0 19990 18213 8935 26 4 0 1000 syz-executor.2 [20093] 0 20093 18244 13203 32 3 0 1000 syz-executor.1 Out of memory: Kill process 19989 (syz-executor.4) score 1007 or sacrifice child Killed process 20004 (syz-executor.4) total-vm:72844kB, anon-rss:17200kB, file-rss:37964kB, shmem-rss:0kB oom_reaper: reaped process 20004 (syz-executor.4), now anon-rss:17268kB, file-rss:3148kB, shmem-rss:0kB oom_reaper: reaped process 19986 (syz-executor.1), now anon-rss:17980kB, file-rss:3268kB, shmem-rss:0kB kauditd_printk_skb: 38 callbacks suppressed audit: type=1400 audit(1573166189.293:6699): avc: denied { map } for pid=20048 comm="modprobe" path="/bin/kmod" dev="sda1" ino=1440 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=0 audit: type=1400 audit(1573166189.293:6700): avc: denied { map } for pid=20057 comm="modprobe" path="/bin/kmod" dev="sda1" ino=1440 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=0 audit: type=1400 audit(1573166189.293:6701): avc: denied { map } for pid=20089 comm="modprobe" path="/bin/kmod" dev="sda1" ino=1440 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=0