audit: type=1804 audit(3839694357.090:431): pid=6015 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir375535403/syzkaller.IiMmOY/758/file0" dev="sda1" ino=17138 res=1 audit: type=1804 audit(3839694357.180:432): pid=6024 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir375535403/syzkaller.IiMmOY/758/file0" dev="sda1" ino=17171 res=1 ====================================================== WARNING: possible circular locking dependency detected 4.19.37 #5 Not tainted ------------------------------------------------------ syz-executor.0/6024 is trying to acquire lock: 000000008c4cb13b (&acct->lock#2){+.+.}, at: acct_pin_kill+0x27/0x100 kernel/acct.c:173 but task is already holding lock: 000000005acd4b6e (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1569 [inline] 000000005acd4b6e (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 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_setattr+0xdd/0x950 fs/overlayfs/inode.c:30 notify_change+0xad9/0xfb0 fs/attr.c:334 do_truncate+0x158/0x220 fs/open.c:63 kobject: 'loop1' (00000000775e113c): kobject_uevent_env handle_truncate fs/namei.c:3008 [inline] do_last fs/namei.c:3424 [inline] path_openat+0x2cc6/0x4690 fs/namei.c:3534 do_filp_open+0x1a1/0x280 fs/namei.c:3564 do_sys_open+0x3fe/0x550 fs/open.c:1069 kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' ksys_open include/linux/syscalls.h:1276 [inline] __do_sys_creat fs/open.c:1127 [inline] __se_sys_creat fs/open.c:1125 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1125 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&ovl_i_mutex_key[depth]){+.+.}: kobject: 'loop3' (000000000ad401e1): kobject_uevent_env 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 kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' do_exit+0x17c0/0x2fa0 kernel/exit.c:866 do_group_exit+0x135/0x370 kernel/exit.c:979 __do_sys_exit_group kernel/exit.c:990 [inline] __se_sys_exit_group kernel/exit.c:988 [inline] __x64_sys_exit_group+0x44/0x50 kernel/exit.c:988 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 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 kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env ---- ---- 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.0/6024: #0: 00000000b18fc3ad (acct_on_mutex){+.+.}, at: __do_sys_acct kernel/acct.c:285 [inline] #0: 00000000b18fc3ad (acct_on_mutex){+.+.}, at: __se_sys_acct kernel/acct.c:273 [inline] #0: 00000000b18fc3ad (acct_on_mutex){+.+.}, at: __x64_sys_acct+0xa6/0x200 kernel/acct.c:273 #1: kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' 000000005acd4b6e (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1569 [inline] 000000005acd4b6e (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 stack backtrace: CPU: 0 PID: 6024 Comm: syz-executor.0 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 kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 acct_pin_kill+0x27/0x100 kernel/acct.c:173 kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env pin_kill+0x18f/0x860 fs/fs_pin.c:50 kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' 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 kobject: 'loop3' (000000000ad401e1): kobject_uevent_env do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' 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 RSP: 002b:00007ff212071c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a3 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000458da9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000440 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff2120726d4 R13: 00000000004becd2 R14: 00000000004cfa50 R15: 00000000ffffffff Process accounting resumed Process accounting resumed kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' audit: type=1400 audit(3839694361.910:433): avc: denied { map } for pid=6561 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000775e113c): kobject_uevent_env FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 6695 Comm: syz-executor.4 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 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env __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] kmem_cache_alloc+0x2b1/0x700 mm/slab.c:3557 vm_area_dup+0x21/0x170 kernel/fork.c:323 __split_vma+0xad/0x570 mm/mmap.c:2628 split_vma+0xa6/0xf0 mm/mmap.c:2686 mprotect_fixup+0x7a0/0xa70 mm/mprotect.c:411 do_mprotect_pkey+0x594/0xa30 mm/mprotect.c:555 __do_sys_pkey_mprotect mm/mprotect.c:588 [inline] __se_sys_pkey_mprotect mm/mprotect.c:585 [inline] __x64_sys_pkey_mprotect+0x97/0xf0 mm/mprotect.c:585 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 RSP: 002b:00007f6f6a7a8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000149 RAX: ffffffffffffffda RBX: 00007f6f6a7a8c90 RCX: 0000000000458da9 RDX: 000000000000000e RSI: 0000000000004000 RDI: 0000000020004000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f6f6a7a96d4 R13: 00000000004c56bc R14: 00000000004d9908 R15: 0000000000000003 CPU: 1 PID: 6697 Comm: syz-executor.2 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 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 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc_trace+0x2cf/0x760 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] assoc_array_insert+0xef/0x2d90 lib/assoc_array.c:985 __key_link_begin+0x12d/0x300 security/keys/keyring.c:1231 key_link+0x8b/0x300 security/keys/keyring.c:1364 key_get_persistent security/keys/persistent.c:116 [inline] keyctl_get_persistent+0x5ac/0x8c0 security/keys/persistent.c:164 __do_sys_keyctl security/keys/keyctl.c:1739 [inline] __se_sys_keyctl security/keys/keyctl.c:1638 [inline] __x64_sys_keyctl+0x159/0x3a0 security/keys/keyctl.c:1638 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 RSP: 002b:00007f271709fc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007f271709fc90 RCX: 0000000000458da9 RDX: 000000002dfc7dea RSI: 0000000000000000 RDI: 0000000000000016 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f27170a06d4 R13: 00000000004c4aa7 R14: 00000000004d8408 R15: 0000000000000003 kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env CPU: 0 PID: 6738 Comm: syz-executor.2 Not tainted 4.19.37 #5 kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' 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 kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env __should_failslab+0x121/0x190 mm/failslab.c:32 kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' 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] kmem_cache_alloc_trace+0x2cf/0x760 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] assoc_array_insert_in_empty_tree lib/assoc_array.c:461 [inline] assoc_array_insert+0x78c/0x2d90 lib/assoc_array.c:996 kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' __key_link_begin+0x12d/0x300 security/keys/keyring.c:1231 key_link+0x8b/0x300 security/keys/keyring.c:1364 kobject: 'loop3' (000000000ad401e1): kobject_uevent_env key_get_persistent security/keys/persistent.c:116 [inline] keyctl_get_persistent+0x5ac/0x8c0 security/keys/persistent.c:164 kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' __do_sys_keyctl security/keys/keyctl.c:1739 [inline] __se_sys_keyctl security/keys/keyctl.c:1638 [inline] __x64_sys_keyctl+0x159/0x3a0 security/keys/keyctl.c:1638 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env 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 RSP: 002b:00007f271709fc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007f271709fc90 RCX: 0000000000458da9 kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' RDX: 0000000019e3132e RSI: 0000000000000000 RDI: 0000000000000016 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f27170a06d4 R13: 00000000004c4aa7 R14: 00000000004d8408 R15: 0000000000000003 kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 6853 Comm: syz-executor.0 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 kobject: 'loop3' (000000000ad401e1): kobject_uevent_env fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 kobject: 'loop3' (000000000ad401e1): 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 kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x2b1/0x700 mm/slab.c:3557 kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' vm_area_dup+0x21/0x170 kernel/fork.c:323 __split_vma+0xad/0x570 mm/mmap.c:2628 split_vma+0xa6/0xf0 mm/mmap.c:2686 mprotect_fixup+0x7a0/0xa70 mm/mprotect.c:411 do_mprotect_pkey+0x594/0xa30 mm/mprotect.c:555 __do_sys_pkey_mprotect mm/mprotect.c:588 [inline] __se_sys_pkey_mprotect mm/mprotect.c:585 [inline] __x64_sys_pkey_mprotect+0x97/0xf0 mm/mprotect.c:585 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 RSP: 002b:00007ff2120b3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000149 RAX: ffffffffffffffda RBX: 00007ff2120b3c90 RCX: 0000000000458da9 RDX: 0000000000000002 RSI: 0000000000001000 RDI: 0000000020005000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ff2120b46d4 R13: 00000000004c56bc R14: 00000000004d9908 R15: 0000000000000004 kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' CPU: 0 PID: 6884 Comm: syz-executor.0 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 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 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x2b1/0x700 mm/slab.c:3557 vm_area_dup+0x21/0x170 kernel/fork.c:323 __split_vma+0xad/0x570 mm/mmap.c:2628 split_vma+0xa6/0xf0 mm/mmap.c:2686 mprotect_fixup+0x826/0xa70 mm/mprotect.c:417 do_mprotect_pkey+0x594/0xa30 mm/mprotect.c:555 __do_sys_pkey_mprotect mm/mprotect.c:588 [inline] __se_sys_pkey_mprotect mm/mprotect.c:585 [inline] __x64_sys_pkey_mprotect+0x97/0xf0 mm/mprotect.c:585 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 RSP: 002b:00007ff2120b3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000149 RAX: ffffffffffffffda RBX: 00007ff2120b3c90 RCX: 0000000000458da9 RDX: 0000000000000002 RSI: 0000000000001000 RDI: 0000000020005000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ff2120b46d4 R13: 00000000004c56bc R14: 00000000004d9908 R15: 0000000000000004 kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000775e113c): kobject_uevent_env kobject: 'loop1' (00000000775e113c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000cf1e3999): kobject_uevent_env kobject: 'loop0' (00000000cf1e3999): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000000ad401e1): kobject_uevent_env kobject: 'loop3' (000000000ad401e1): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop2' (00000000b2442cfc): kobject_uevent_env kobject: 'loop2' (00000000b2442cfc): fill_kobj_path: path = '/devices/virtual/block/loop2' CPU: 0 PID: 6928 Comm: syz-executor.0 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 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 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x2b1/0x700 mm/slab.c:3557 kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env anon_vma_chain_alloc mm/rmap.c:129 [inline] __anon_vma_prepare+0x62/0x3c0 mm/rmap.c:183 kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' anon_vma_prepare include/linux/rmap.h:153 [inline] do_cow_fault mm/memory.c:3691 [inline] do_fault mm/memory.c:3806 [inline] handle_pte_fault mm/memory.c:4035 [inline] __handle_mm_fault+0x3581/0x3f80 mm/memory.c:4159 handle_mm_fault+0x43f/0xb30 mm/memory.c:4196 faultin_page mm/gup.c:518 [inline] __get_user_pages+0x609/0x1770 mm/gup.c:718 populate_vma_page_range+0x20d/0x2a0 mm/gup.c:1222 mprotect_fixup+0x749/0xa70 mm/mprotect.c:440 kobject: 'loop4' (00000000fb13e8d2): kobject_uevent_env kobject: 'loop4' (00000000fb13e8d2): fill_kobj_path: path = '/devices/virtual/block/loop4' do_mprotect_pkey+0x594/0xa30 mm/mprotect.c:555 __do_sys_pkey_mprotect mm/mprotect.c:588 [inline] __se_sys_pkey_mprotect mm/mprotect.c:585 [inline] __x64_sys_pkey_mprotect+0x97/0xf0 mm/mprotect.c:585 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 RSP: 002b:00007ff2120b3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000149 RAX: ffffffffffffffda RBX: 00007ff2120b3c90 RCX: 0000000000458da9 RDX: 0000000000000002 RSI: 0000000000001000 RDI: 0000000020005000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ff2120b46d4 R13: 00000000004c56bc R14: 00000000004d9908 R15: 0000000000000004