INFO: task syz-executor.2:9113 can't die for more than 143 seconds. syz-executor.2 D25840 9113 7021 0x00004004 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 bit_wait+0x12/0xa0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x60/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xd5/0x110 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] wait_for_key_construction+0x10b/0x140 security/keys/request_key.c:664 request_key_tag+0x7a/0xb0 security/keys/request_key.c:705 dns_query+0x257/0x6c3 net/dns_resolver/dns_query.c:128 ceph_dns_resolve_name net/ceph/messenger.c:1887 [inline] ceph_parse_server_name net/ceph/messenger.c:1922 [inline] ceph_parse_ips+0x77f/0x8c0 net/ceph/messenger.c:1949 ceph_parse_mon_ips+0x59/0xc0 net/ceph/ceph_common.c:411 ceph_parse_source fs/ceph/super.c:271 [inline] ceph_parse_mount_param+0x1239/0x17e0 fs/ceph/super.c:322 vfs_parse_fs_param fs/fs_context.c:117 [inline] vfs_parse_fs_param+0x203/0x550 fs/fs_context.c:98 vfs_parse_fs_string+0xe6/0x150 fs/fs_context.c:161 do_new_mount fs/namespace.c:2905 [inline] do_mount+0x1222/0x1df0 fs/namespace.c:3237 __do_sys_mount fs/namespace.c:3447 [inline] __se_sys_mount fs/namespace.c:3424 [inline] __x64_sys_mount+0x18f/0x230 fs/namespace.c:3424 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f445645fc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f72e0 RCX: 000000000045cb29 RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 00000000200005c0 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000772 R14: 00000000004ca761 R15: 00007f44564606d4 INFO: task syz-executor.2:9113 blocked for more than 143 seconds. Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D25840 9113 7021 0x00004004 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 bit_wait+0x12/0xa0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x60/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xd5/0x110 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] wait_for_key_construction+0x10b/0x140 security/keys/request_key.c:664 request_key_tag+0x7a/0xb0 security/keys/request_key.c:705 dns_query+0x257/0x6c3 net/dns_resolver/dns_query.c:128 ceph_dns_resolve_name net/ceph/messenger.c:1887 [inline] ceph_parse_server_name net/ceph/messenger.c:1922 [inline] ceph_parse_ips+0x77f/0x8c0 net/ceph/messenger.c:1949 ceph_parse_mon_ips+0x59/0xc0 net/ceph/ceph_common.c:411 ceph_parse_source fs/ceph/super.c:271 [inline] ceph_parse_mount_param+0x1239/0x17e0 fs/ceph/super.c:322 vfs_parse_fs_param fs/fs_context.c:117 [inline] vfs_parse_fs_param+0x203/0x550 fs/fs_context.c:98 vfs_parse_fs_string+0xe6/0x150 fs/fs_context.c:161 do_new_mount fs/namespace.c:2905 [inline] do_mount+0x1222/0x1df0 fs/namespace.c:3237 __do_sys_mount fs/namespace.c:3447 [inline] __se_sys_mount fs/namespace.c:3424 [inline] __x64_sys_mount+0x18f/0x230 fs/namespace.c:3424 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f445645fc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f72e0 RCX: 000000000045cb29 RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 00000000200005c0 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000772 R14: 00000000004ca761 R15: 00007f44564606d4 INFO: task syz-executor.2:9132 can't die for more than 144 seconds. syz-executor.2 D29224 9132 7021 0x00004006 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 bit_wait+0x12/0xa0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x60/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xd5/0x110 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] wait_for_key_construction+0x10b/0x140 security/keys/request_key.c:664 request_key_tag+0x7a/0xb0 security/keys/request_key.c:705 dns_query+0x257/0x6c3 net/dns_resolver/dns_query.c:128 ceph_dns_resolve_name net/ceph/messenger.c:1887 [inline] ceph_parse_server_name net/ceph/messenger.c:1922 [inline] ceph_parse_ips+0x77f/0x8c0 net/ceph/messenger.c:1949 ceph_parse_mon_ips+0x59/0xc0 net/ceph/ceph_common.c:411 ceph_parse_source fs/ceph/super.c:271 [inline] ceph_parse_mount_param+0x1239/0x17e0 fs/ceph/super.c:322 vfs_parse_fs_param fs/fs_context.c:117 [inline] vfs_parse_fs_param+0x203/0x550 fs/fs_context.c:98 vfs_parse_fs_string+0xe6/0x150 fs/fs_context.c:161 do_new_mount fs/namespace.c:2905 [inline] do_mount+0x1222/0x1df0 fs/namespace.c:3237 __do_sys_mount fs/namespace.c:3447 [inline] __se_sys_mount fs/namespace.c:3424 [inline] __x64_sys_mount+0x18f/0x230 fs/namespace.c:3424 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f445643ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f72e0 RCX: 000000000045cb29 RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 00000000200005c0 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000772 R14: 00000000004ca761 R15: 00007f445643f6d4 INFO: task syz-executor.2:9132 blocked for more than 144 seconds. Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29224 9132 7021 0x00004006 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 bit_wait+0x12/0xa0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x60/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xd5/0x110 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] wait_for_key_construction+0x10b/0x140 security/keys/request_key.c:664 request_key_tag+0x7a/0xb0 security/keys/request_key.c:705 dns_query+0x257/0x6c3 net/dns_resolver/dns_query.c:128 ceph_dns_resolve_name net/ceph/messenger.c:1887 [inline] ceph_parse_server_name net/ceph/messenger.c:1922 [inline] ceph_parse_ips+0x77f/0x8c0 net/ceph/messenger.c:1949 ceph_parse_mon_ips+0x59/0xc0 net/ceph/ceph_common.c:411 ceph_parse_source fs/ceph/super.c:271 [inline] ceph_parse_mount_param+0x1239/0x17e0 fs/ceph/super.c:322 vfs_parse_fs_param fs/fs_context.c:117 [inline] vfs_parse_fs_param+0x203/0x550 fs/fs_context.c:98 vfs_parse_fs_string+0xe6/0x150 fs/fs_context.c:161 do_new_mount fs/namespace.c:2905 [inline] do_mount+0x1222/0x1df0 fs/namespace.c:3237 __do_sys_mount fs/namespace.c:3447 [inline] __se_sys_mount fs/namespace.c:3424 [inline] __x64_sys_mount+0x18f/0x230 fs/namespace.c:3424 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f445643ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f72e0 RCX: 000000000045cb29 RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 00000000200005c0 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000772 R14: 00000000004ca761 R15: 00007f445643f6d4 Showing all locks held in the system: 2 locks held by kworker/u4:4/122: 1 lock held by khungtaskd/1151: #0: ffffffff89bc3000 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1151 Comm: khungtaskd Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:339 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3865 Comm: systemd-journal Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49 Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 cc cc cc cc cc cc 41 57 41 56 41 55 41 54 55 53 48 89 fb RSP: 0018:ffffc900015b7940 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffea00024e3e40 RCX: 0000000000000600 RDX: 1ffff110127a8668 RSI: 0000000000000002 RDI: ffff8880938f9a00 RBP: ffff888093d42080 R08: 0000000000000001 R09: ffffed101271f000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffed10127a869a R13: dffffc0000000000 R14: ffffea00024e3e80 R15: ffff888093d434d0 FS: 00007fb215ea98c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb21329c028 CR3: 0000000094210000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: clear_page arch/x86/include/asm/page_64.h:49 [inline] clear_highpage include/linux/highmem.h:283 [inline] kernel_init_free_pages+0x92/0x120 mm/page_alloc.c:1162 prep_new_page+0x12e/0x1f0 mm/page_alloc.c:2224 get_page_from_freelist+0x2679/0x3770 mm/page_alloc.c:3813 __alloc_pages_nodemask+0x291/0x700 mm/page_alloc.c:4863 __alloc_pages include/linux/gfp.h:509 [inline] __alloc_pages_node include/linux/gfp.h:522 [inline] kmem_getpages mm/slab.c:1376 [inline] cache_grow_begin+0x89/0x440 mm/slab.c:2594 cache_alloc_refill+0x27b/0x340 mm/slab.c:2966 ____cache_alloc mm/slab.c:3049 [inline] ____cache_alloc mm/slab.c:3032 [inline] __do_cache_alloc mm/slab.c:3272 [inline] slab_alloc mm/slab.c:3308 [inline] kmem_cache_alloc+0x4b7/0x550 mm/slab.c:3486 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags include/linux/audit.h:320 [inline] getname+0x8e/0xd0 fs/namei.c:209 do_sys_openat2+0xf7/0x3b0 fs/open.c:1167 do_sys_open fs/open.c:1189 [inline] ksys_open include/linux/syscalls.h:1398 [inline] __do_sys_open fs/open.c:1195 [inline] __se_sys_open fs/open.c:1193 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1193 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb215439840 Code: Bad RIP value. RSP: 002b:00007ffce08b1db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffce08b20c0 RCX: 00007fb215439840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 00005601afdefe70 RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 00005601afde4040 R14: 00007ffce08b2080 R15: 00005601afdefec0