====================================================== WARNING: possible circular locking dependency detected 4.19.37 #5 Not tainted ------------------------------------------------------ syz-executor.1/30220 is trying to acquire lock: 0000000076e0ec30 (&acct->lock#2){+.+.}, at: acct_pin_kill+0x27/0x100 kernel/acct.c:173 but task is already holding lock: 00000000006bdf1e (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1569 [inline] 00000000006bdf1e (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 kobject: 'cfpts1' (00000000bcb266b6): kobject_add_internal: parent: 'net', set: 'devices' which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_writers#4){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x20b/0x360 fs/super.c:1387 sb_start_write include/linux/fs.h:1569 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:360 ovl_want_write+0x76/0xa0 fs/overlayfs/util.c:24 ovl_link+0x7c/0x2d5 fs/overlayfs/dir.c:674 vfs_link+0x7a4/0xb60 fs/namei.c:4240 do_linkat+0x550/0x770 fs/namei.c:4308 __do_sys_link fs/namei.c:4337 [inline] __se_sys_link fs/namei.c:4335 [inline] __x64_sys_link+0x61/0x80 fs/namei.c:4335 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&ovl_i_mutex_key[depth]){+.+.}: down_write+0x38/0x90 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:738 [inline] ovl_write_iter+0x148/0xc20 fs/overlayfs/file.c:231 call_write_iter include/linux/fs.h:1811 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x58e/0x820 fs/read_write.c:487 __kernel_write+0x110/0x390 fs/read_write.c:506 do_acct_process+0xd37/0x1150 kernel/acct.c:520 slow_acct_process kernel/acct.c:579 [inline] acct_process+0x568/0x61e kernel/acct.c:605 do_exit+0x17c0/0x2fa0 kernel/exit.c:866 kobject: 'cfpts1' (00000000bcb266b6): kobject_uevent_env do_group_exit+0x135/0x370 kernel/exit.c:979 get_signal+0x399/0x1d50 kernel/signal.c:2572 do_signal+0x95/0x1950 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&acct->lock#2){+.+.}: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 acct_pin_kill+0x27/0x100 kernel/acct.c:173 pin_kill+0x18f/0x860 fs/fs_pin.c:50 acct_on+0x574/0x790 kernel/acct.c:254 __do_sys_acct kernel/acct.c:286 [inline] __se_sys_acct kernel/acct.c:273 [inline] __x64_sys_acct+0xae/0x200 kernel/acct.c:273 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &acct->lock#2 --> &ovl_i_mutex_key[depth] --> sb_writers#4 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#4); lock(&ovl_i_mutex_key[depth]); lock(sb_writers#4); lock(&acct->lock#2); *** DEADLOCK *** 2 locks held by syz-executor.1/30220: #0: 000000007db917e2 (acct_on_mutex){+.+.}, at: __do_sys_acct kernel/acct.c:285 [inline] #0: 000000007db917e2 (acct_on_mutex){+.+.}, at: __se_sys_acct kernel/acct.c:273 [inline] #0: 000000007db917e2 (acct_on_mutex){+.+.}, at: __x64_sys_acct+0xa6/0x200 kernel/acct.c:273 #1: 00000000006bdf1e (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1569 [inline] #1: 00000000006bdf1e (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 stack backtrace: CPU: 0 PID: 30220 Comm: syz-executor.1 Not tainted 4.19.37 #5 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+0x172/0x1f0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1861 [inline] check_prevs_add kernel/locking/lockdep.c:1974 [inline] validate_chain kernel/locking/lockdep.c:2415 [inline] __lock_acquire+0x2e6d/0x48f0 kernel/locking/lockdep.c:3411 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 acct_pin_kill+0x27/0x100 kernel/acct.c:173 pin_kill+0x18f/0x860 fs/fs_pin.c:50 acct_on+0x574/0x790 kernel/acct.c:254 __do_sys_acct kernel/acct.c:286 [inline] __se_sys_acct kernel/acct.c:273 [inline] __x64_sys_acct+0xae/0x200 kernel/acct.c:273 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 kobject: 'cfpts1' (00000000bcb266b6): fill_kobj_path: path = '/devices/virtual/net/cfpts1' RSP: 002b:00007fdd9e6ddc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a3 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000458da9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdd9e6de6d4 R13: 00000000004becd2 R14: 00000000004cfa50 R15: 00000000ffffffff kobject: 'kvm' (00000000f4548637): kobject_uevent_env kobject: 'queues' (00000000f2ed3731): kobject_add_internal: parent: 'cfpts1', set: '' kobject: 'kvm' (00000000f4548637): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'queues' (00000000f2ed3731): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env Process accounting resumed kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'queues' (00000000f2ed3731): kobject_uevent_env: filter function caused the event to drop! kobject: 'kvm' (00000000f4548637): kobject_uevent_env Process accounting resumed kobject: 'kvm' (00000000f4548637): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'rx-0' (00000000bbf802f8): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'rx-0' (00000000bbf802f8): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'rx-0' (00000000bbf802f8): fill_kobj_path: path = '/devices/virtual/net/cfpts1/queues/rx-0' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'tx-0' (000000003e6fa0ab): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'kvm' (00000000f4548637): kobject_uevent_env kobject: 'tx-0' (000000003e6fa0ab): kobject_uevent_env kobject: 'kvm' (00000000f4548637): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'tx-0' (000000003e6fa0ab): fill_kobj_path: path = '/devices/virtual/net/cfpts1/queues/tx-0' kobject: 'kvm' (00000000f4548637): kobject_uevent_env kobject: 'kvm' (00000000f4548637): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'rx-0' (00000000bbf802f8): kobject_cleanup, parent 00000000f2ed3731 kobject: 'rx-0' (00000000bbf802f8): auto cleanup 'remove' event kobject: 'rx-0' (00000000bbf802f8): kobject_uevent_env kobject: 'rx-0' (00000000bbf802f8): fill_kobj_path: path = '/devices/virtual/net/cfpts1/queues/rx-0' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'rx-0' (00000000bbf802f8): auto cleanup kobject_del kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'rx-0' (00000000bbf802f8): calling ktype release kobject: 'rx-0': free name kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'tx-0' (000000003e6fa0ab): kobject_cleanup, parent 00000000f2ed3731 kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'tx-0' (000000003e6fa0ab): auto cleanup 'remove' event kobject: 'tx-0' (000000003e6fa0ab): kobject_uevent_env kobject: 'tx-0' (000000003e6fa0ab): fill_kobj_path: path = '/devices/virtual/net/cfpts1/queues/tx-0' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'tx-0' (000000003e6fa0ab): auto cleanup kobject_del kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'tx-0' (000000003e6fa0ab): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000f2ed3731): kobject_cleanup, parent (null) kobject: 'queues' (00000000f2ed3731): calling ktype release kobject: 'queues' (00000000f2ed3731): kset_release kobject: 'queues': free name kobject: 'cfpts1' (00000000bcb266b6): kobject_uevent_env kobject: 'cfpts1' (00000000bcb266b6): fill_kobj_path: path = '/devices/virtual/net/cfpts1' kobject: 'cfpts1' (00000000bcb266b6): kobject_cleanup, parent (null) kobject: 'cfpts1' (00000000bcb266b6): calling ktype release kobject: 'cfpts1': free name kobject: 'cfpts1' (000000005f4fd50f): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'cfpts1' (000000005f4fd50f): kobject_uevent_env kobject: 'cfpts1' (000000005f4fd50f): fill_kobj_path: path = '/devices/virtual/net/cfpts1' kobject: 'queues' (00000000fce88346): kobject_add_internal: parent: 'cfpts1', set: '' kobject: 'queues' (00000000fce88346): kobject_uevent_env kobject: 'queues' (00000000fce88346): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000b9fac825): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000b9fac825): kobject_uevent_env kobject: 'rx-0' (00000000b9fac825): fill_kobj_path: path = '/devices/virtual/net/cfpts1/queues/rx-0' kobject: 'tx-0' (00000000863089d4): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000863089d4): kobject_uevent_env kobject: 'tx-0' (00000000863089d4): fill_kobj_path: path = '/devices/virtual/net/cfpts1/queues/tx-0' kobject: 'rx-0' (00000000b9fac825): kobject_cleanup, parent 00000000fce88346 kobject: 'rx-0' (00000000b9fac825): auto cleanup 'remove' event kobject: 'rx-0' (00000000b9fac825): kobject_uevent_env kobject: 'rx-0' (00000000b9fac825): fill_kobj_path: path = '/devices/virtual/net/cfpts1/queues/rx-0' kauditd_printk_skb: 102 callbacks suppressed audit: type=1400 audit(2000000979.444:6361): avc: denied { create } for pid=30254 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'rx-0' (00000000b9fac825): auto cleanup kobject_del kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'rx-0' (00000000b9fac825): calling ktype release audit: type=1400 audit(2000000979.494:6362): avc: denied { create } for pid=30254 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'rx-0': free name kobject: 'loop3' (0000000067362625): kobject_uevent_env audit: type=1400 audit(2000000979.504:6363): avc: denied { write } for pid=30254 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'tx-0' (00000000863089d4): kobject_cleanup, parent 00000000fce88346 kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1400 audit(2000000979.504:6364): avc: denied { read } for pid=30254 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'tx-0' (00000000863089d4): auto cleanup 'remove' event kobject: 'tx-0' (00000000863089d4): kobject_uevent_env audit: type=1400 audit(2000000979.504:6365): avc: denied { map } for pid=30258 comm="syz-executor.1" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=529251 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 kobject: 'tx-0' (00000000863089d4): fill_kobj_path: path = '/devices/virtual/net/cfpts1/queues/tx-0' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'tx-0' (00000000863089d4): auto cleanup kobject_del kobject: 'tx-0' (00000000863089d4): calling ktype release audit: type=1400 audit(2000000979.514:6366): avc: denied { write } for pid=30254 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'tx-0': free name kobject: 'queues' (00000000fce88346): kobject_cleanup, parent (null) kobject: 'queues' (00000000fce88346): calling ktype release audit: type=1400 audit(2000000979.514:6367): avc: denied { map } for pid=30258 comm="syz-executor.1" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=529862 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 kobject: 'queues' (00000000fce88346): kset_release kobject: 'queues': free name kobject: 'cfpts1' (000000005f4fd50f): kobject_uevent_env kobject: 'cfpts1' (000000005f4fd50f): fill_kobj_path: path = '/devices/virtual/net/cfpts1' audit: type=1400 audit(2000000979.724:6368): avc: denied { map } for pid=30271 comm="syz-executor.1" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=529880 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1400 audit(2000000979.984:6369): avc: denied { map } for pid=30277 comm="syz-executor.1" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=529258 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 kobject: 'cfpts1' (000000005f4fd50f): kobject_cleanup, parent (null) kobject: 'cfpts1' (000000005f4fd50f): calling ktype release kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env audit: type=1400 audit(2000000980.134:6370): avc: denied { create } for pid=30254 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'cfpts1': free name kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env SELinux: unrecognized netlink message: protocol=0 nlmsg_type=43 sclass=netlink_route_socket pig=30452 comm=syz-executor.5 kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env SELinux: unrecognized netlink message: protocol=0 nlmsg_type=43 sclass=netlink_route_socket pig=30466 comm=syz-executor.5 kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' SELinux: unrecognized netlink message: protocol=0 nlmsg_type=43 sclass=netlink_route_socket pig=30480 comm=syz-executor.5 kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' SELinux: unrecognized netlink message: protocol=0 nlmsg_type=43 sclass=netlink_route_socket pig=30503 comm=syz-executor.1 kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' SELinux: unrecognized netlink message: protocol=0 nlmsg_type=43 sclass=netlink_route_socket pig=30522 comm=syz-executor.1 kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env SELinux: unrecognized netlink message: protocol=0 nlmsg_type=43 sclass=netlink_route_socket pig=30544 comm=syz-executor.1 kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=30562 comm=syz-executor.1 kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kauditd_printk_skb: 100 callbacks suppressed audit: type=1400 audit(2000000984.474:6471): avc: denied { create } for pid=30568 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env audit: type=1400 audit(2000000984.524:6472): avc: denied { create } for pid=30568 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' audit: type=1400 audit(2000000984.524:6473): avc: denied { write } for pid=30568 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop4' (000000007901e700): kobject_uevent_env audit: type=1400 audit(2000000984.524:6474): avc: denied { read } for pid=30568 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=30575 comm=syz-executor.1 kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env audit: type=1400 audit(2000000984.754:6475): avc: denied { create } for pid=30580 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' audit: type=1400 audit(2000000984.764:6476): avc: denied { write } for pid=30580 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop3' (0000000067362625): kobject_uevent_env SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=30590 comm=syz-executor.1 kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env audit: type=1400 audit(2000000984.774:6477): avc: denied { read } for pid=30580 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' audit: type=1400 audit(2000000985.064:6478): avc: denied { create } for pid=30595 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1400 audit(2000000985.074:6479): avc: denied { create } for pid=30595 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env audit: type=1400 audit(2000000985.074:6480): avc: denied { write } for pid=30595 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=30646 comm=syz-executor.1 kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000067362625): kobject_uevent_env kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' CPU: 1 PID: 30704 Comm: syz-executor.2 Not tainted 4.19.37 #5 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop3' (0000000067362625): kobject_uevent_env Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' __should_failslab+0x121/0x190 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc_track_caller+0x2e1/0x750 mm/slab.c:3742 kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env memdup_user+0x26/0xb0 mm/util.c:160 strndup_user+0x77/0xd0 mm/util.c:217 copy_mount_string fs/namespace.c:2703 [inline] ksys_mount+0x3c/0x150 fs/namespace.c:3000 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3026 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' RSP: 002b:00007fc9e3c5ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc9e3c5ac90 RCX: 0000000000458da9 RDX: 000000002015bffc RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc9e3c5b6d4 R13: 00000000004c4da1 R14: 00000000004d8a08 R15: 0000000000000004 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop4' (000000007901e700): kobject_uevent_env CPU: 0 PID: 30720 Comm: syz-executor.3 Not tainted 4.19.37 #5 kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' 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+0x172/0x1f0 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 __should_failslab+0x121/0x190 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 kobject: 'loop3' (0000000067362625): kobject_uevent_env slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc_track_caller+0x2e1/0x750 mm/slab.c:3742 kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' memdup_user+0x26/0xb0 mm/util.c:160 strndup_user+0x77/0xd0 mm/util.c:217 copy_mount_string fs/namespace.c:2703 [inline] ksys_mount+0x3c/0x150 fs/namespace.c:3000 kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3026 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env RSP: 002b:00007f20e3473c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f20e3473c90 RCX: 0000000000458da9 RDX: 000000002015bffc RSI: 00000000200000c0 RDI: 0000000000000000 kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' RBP: 000000000073bf00 R08: 0000000020000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f20e34746d4 R13: 00000000004c4da1 R14: 00000000004d8a08 R15: 0000000000000004 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop4' (000000007901e700): kobject_uevent_env CPU: 0 PID: 30723 Comm: syz-executor.4 Not tainted 4.19.37 #5 kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2' __should_failslab+0x121/0x190 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 kobject: 'loop3' (0000000067362625): kobject_uevent_env slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x47/0x700 mm/slab.c:3557 kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' kmem_cache_zalloc include/linux/slab.h:699 [inline] avc_alloc_node+0x2a/0x630 security/selinux/avc.c:572 avc_insert security/selinux/avc.c:696 [inline] avc_compute_av+0x22d/0x690 security/selinux/avc.c:1008 kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env avc_has_perm_noaudit security/selinux/avc.c:1149 [inline] avc_has_perm+0x32d/0x610 security/selinux/avc.c:1184 kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' inode_has_perm.isra.0+0x176/0x210 security/selinux/hooks.c:1830 kobject: 'loop4' (000000007901e700): kobject_uevent_env file_has_perm+0x2dc/0x390 security/selinux/hooks.c:1922 kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' selinux_revalidate_file_permission security/selinux/hooks.c:3547 [inline] selinux_file_permission+0x3bf/0x550 security/selinux/hooks.c:3568 security_file_permission+0x79/0x230 security/security.c:875 kobject: 'loop3' (0000000067362625): kobject_uevent_env rw_verify_area+0x110/0x360 fs/read_write.c:391 do_iter_write+0x100/0x600 fs/read_write.c:954 kobject: 'loop3' (0000000067362625): fill_kobj_path: path = '/devices/virtual/block/loop3' vfs_writev+0x1b3/0x2f0 fs/read_write.c:1004 kobject: 'loop4' (000000007901e700): kobject_uevent_env kobject: 'loop4' (000000007901e700): fill_kobj_path: path = '/devices/virtual/block/loop4' do_writev+0xf6/0x290 fs/read_write.c:1039 kobject: 'loop5' (00000000c17b17ff): kobject_uevent_env kobject: 'loop5' (00000000c17b17ff): fill_kobj_path: path = '/devices/virtual/block/loop5' __do_sys_writev fs/read_write.c:1112 [inline] __se_sys_writev fs/read_write.c:1109 [inline] __x64_sys_writev+0x75/0xb0 fs/read_write.c:1109 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c61 Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 e4 b9 fb ff c3 48 83 ec 08 e8 1a 2d 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 63 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f76db447ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 0000000000000066 RCX: 0000000000458c61 RDX: 0000000000000001 RSI: 00007f76db447c00 RDI: 00000000000000f0 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000064 R11: 0000000000000293 R12: 00007f76db4486d4 R13: 00000000004c76b6 R14: 00000000004dd610 R15: 0000000000000003 kobject: 'loop2' (0000000005fe1eaa): kobject_uevent_env kobject: 'loop2' (0000000005fe1eaa): fill_kobj_path: path = '/devices/virtual/block/loop2'