====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc3+ #222 Not tainted ------------------------------------------------------ syz-executor1/1176 is trying to acquire lock: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000008fac2800>] get_online_cpus include/linux/cpu.h:117 [inline] (cpu_hotplug_lock.rw_sem){++++}, at: [<000000008fac2800>] lru_add_drain_all+0xe/0x20 mm/swap.c:729 but task is already holding lock: (&sb->s_type->i_mutex_key#10){++++}, at: [<0000000090a29ebc>] inode_lock include/linux/fs.h:713 [inline] (&sb->s_type->i_mutex_key#10){++++}, at: [<0000000090a29ebc>] shmem_add_seals+0x197/0x1060 mm/shmem.c:2768 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&sb->s_type->i_mutex_key#10){++++}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 down_write+0x87/0x120 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:713 [inline] generic_file_write_iter+0xdc/0x7a0 mm/filemap.c:3289 call_write_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x531/0x7f0 fs/read_write.c:653 do_iter_write+0x15a/0x540 fs/read_write.c:932 vfs_iter_write+0x77/0xb0 fs/read_write.c:945 iter_file_splice_write+0x7db/0xf30 fs/splice.c:749 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x7d5/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #5 (&pipe->mutex/1){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 pipe_lock_nested fs/pipe.c:67 [inline] pipe_lock+0x56/0x70 fs/pipe.c:75 iter_file_splice_write+0x264/0xf30 fs/splice.c:699 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x7d5/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #4 (sb_writers){.+.+}: spin_lock include/linux/spinlock.h:315 [inline] devtmpfsd+0x224/0x4b0 drivers/base/devtmpfs.c:392 kthread+0x37a/0x440 kernel/kthread.c:238 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:441 0xffffffffffffffff getname_kernel+0x54/0x340 fs/namei.c:218 -> #3 ((completion)&req.done){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 complete_acquire include/linux/completion.h:40 [inline] __wait_for_common kernel/sched/completion.c:109 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0xcb/0x7b0 kernel/sched/completion.c:144 devtmpfs_create_node+0x32b/0x4a0 drivers/base/devtmpfs.c:115 device_add+0x120f/0x1640 drivers/base/core.c:1824 device_create_groups_vargs+0x1f3/0x250 drivers/base/core.c:2430 device_create_vargs drivers/base/core.c:2470 [inline] device_create+0xda/0x110 drivers/base/core.c:2506 msr_device_create+0x26/0x40 arch/x86/kernel/msr.c:188 cpuhp_invoke_callback+0x2ea/0x1d20 kernel/cpu.c:182 cpuhp_thread_fun+0x48e/0x7e0 kernel/cpu.c:571 smpboot_thread_fn+0x450/0x7c0 kernel/smpboot.c:164 kthread+0x37a/0x440 kernel/kthread.c:238 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:441 -> #2 (cpuhp_state-up){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 cpuhp_lock_acquire kernel/cpu.c:85 [inline] cpuhp_invoke_ap_callback kernel/cpu.c:605 [inline] cpuhp_issue_call+0x1e5/0x520 kernel/cpu.c:1495 __cpuhp_setup_state_cpuslocked+0x282/0x600 kernel/cpu.c:1642 __cpuhp_setup_state+0xb0/0x140 kernel/cpu.c:1671 cpuhp_setup_state include/linux/cpuhotplug.h:201 [inline] page_writeback_init+0x4d/0x71 mm/page-writeback.c:2081 pagecache_init+0x48/0x4f mm/filemap.c:977 start_kernel+0x6c1/0x754 init/main.c:695 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 -> #1 (cpuhp_state_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 __cpuhp_setup_state_cpuslocked+0x5b/0x600 kernel/cpu.c:1617 __cpuhp_setup_state+0xb0/0x140 kernel/cpu.c:1671 cpuhp_setup_state_nocalls include/linux/cpuhotplug.h:229 [inline] kvm_guest_init+0x1f3/0x20f arch/x86/kernel/kvm.c:528 setup_arch+0x17e8/0x1a02 arch/x86/kernel/setup.c:1266 start_kernel+0xa5/0x754 init/main.c:530 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 -> #0 (cpu_hotplug_lock.rw_sem){++++}: check_prevs_add kernel/locking/lockdep.c:2031 [inline] validate_chain kernel/locking/lockdep.c:2473 [inline] __lock_acquire+0x3498/0x47f0 kernel/locking/lockdep.c:3500 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] lru_add_drain_all+0xe/0x20 mm/swap.c:729 shmem_wait_for_pins mm/shmem.c:2672 [inline] shmem_add_seals+0x3df/0x1060 mm/shmem.c:2780 shmem_fcntl+0xfe/0x130 mm/shmem.c:2815 do_fcntl+0x73e/0x1160 fs/fcntl.c:421 SYSC_fcntl fs/fcntl.c:463 [inline] SyS_fcntl+0xdc/0x120 fs/fcntl.c:448 entry_SYSCALL_64_fastpath+0x1f/0x96 other info that might help us debug this: Chain exists of: cpu_hotplug_lock.rw_sem --> &pipe->mutex/1 --> &sb->s_type->i_mutex_key#10 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#10); lock(&pipe->mutex/1); lock(&sb->s_type->i_mutex_key#10); lock(cpu_hotplug_lock.rw_sem); *** DEADLOCK *** 1 lock held by syz-executor1/1176: #0: (&sb->s_type->i_mutex_key#10){++++}, at: [<0000000090a29ebc>] inode_lock include/linux/fs.h:713 [inline] #0: (&sb->s_type->i_mutex_key#10){++++}, at: [<0000000090a29ebc>] shmem_add_seals+0x197/0x1060 mm/shmem.c:2768 stack backtrace: CPU: 1 PID: 1176 Comm: syz-executor1 Not tainted 4.15.0-rc3+ #222 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_circular_bug+0x42d/0x610 kernel/locking/lockdep.c:1271 check_prev_add+0x666/0x15f0 kernel/locking/lockdep.c:1914 check_prevs_add kernel/locking/lockdep.c:2031 [inline] validate_chain kernel/locking/lockdep.c:2473 [inline] __lock_acquire+0x3498/0x47f0 kernel/locking/lockdep.c:3500 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] lru_add_drain_all+0xe/0x20 mm/swap.c:729 shmem_wait_for_pins mm/shmem.c:2672 [inline] shmem_add_seals+0x3df/0x1060 mm/shmem.c:2780 shmem_fcntl+0xfe/0x130 mm/shmem.c:2815 do_fcntl+0x73e/0x1160 fs/fcntl.c:421 SYSC_fcntl fs/fcntl.c:463 [inline] SyS_fcntl+0xdc/0x120 fs/fcntl.c:448 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007f89f12abc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000048 RAX: ffffffffffffffda RBX: 00007f89f12ac700 RCX: 0000000000452a39 RDX: 000000000000000a RSI: 0000000000000409 RDI: 0000000000000015 RBP: 0000000000a6f880 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a6f7ff R14: 00007f89f12ac9c0 R15: 000000000000000f netlink: 11 bytes leftover after parsing attributes in process `syz-executor7'. device gre0 entered promiscuous mode netlink: 11 bytes leftover after parsing attributes in process `syz-executor7'. audit: type=1400 audit(1513380737.013:2631): avc: denied { setgid } for pid=1274 comm="syz-executor6" capability=6 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 binder: 1306:1307 ioctl 40106410 20926ff0 returned -22 binder: 1306:1307 ioctl ae03 2 returned -22 netlink: 2 bytes leftover after parsing attributes in process `syz-executor4'. binder: BINDER_SET_CONTEXT_MGR already set binder: 1306:1318 ioctl 40046207 0 returned -16 xprt_adjust_timeout: rq_timeout = 0! binder: BINDER_SET_CONTEXT_MGR already set binder: 1306:1337 ioctl 40046207 0 returned -16 binder: 1306:1337 ioctl 40106410 20926ff0 returned -22 binder: 1306:1318 ioctl ae03 2 returned -22 audit: type=1400 audit(1513380737.301:2632): avc: denied { ipc_lock } for pid=1347 comm="syz-executor5" capability=14 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 xprt_adjust_timeout: rq_timeout = 0! netlink: 2 bytes leftover after parsing attributes in process `syz-executor4'. device gre0 entered promiscuous mode kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write audit: type=1326 audit(1513380737.864:2633): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=1496 comm="syz-executor3" exe="/root/syz-executor3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0xfff00000 audit: type=1400 audit(1513380737.947:2634): avc: denied { sys_chroot } for pid=1516 comm="syz-executor0" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready binder: 1597:1603 ioctl 40286608 5 returned -22 binder: 1597:1603 ioctl 40046205 3 returned -22 binder: 1597:1603 ERROR: BC_REGISTER_LOOPER called without request binder: 1603 RLIMIT_NICE not set binder: 1603 RLIMIT_NICE not set netlink: 5 bytes leftover after parsing attributes in process `syz-executor6'. binder: 1597:1617 got reply transaction with bad transaction stack, transaction 356 has target 1597:0 binder: 1597:1617 transaction failed 29201/-71, size 32-8 line 2705 binder: 1597:1617 ioctl 40286608 5 returned -22 binder: 1597:1617 ioctl 40046205 3 returned -22 netlink: 5 bytes leftover after parsing attributes in process `syz-executor6'. binder: BINDER_SET_CONTEXT_MGR already set binder: 1597:1617 ioctl 40046207 0 returned -16 binder: 1597:1603 ERROR: BC_REGISTER_LOOPER called without request binder: 1603 RLIMIT_NICE not set binder_alloc: 1597: binder_alloc_buf, no vma binder: 1597:1617 transaction failed 29189/-3, size 0-0 line 2890 binder: 1597:1603 got reply transaction with no transaction stack binder: 1597:1603 transaction failed 29201/-71, size 32-8 line 2690 binder: 1597:1617 DecRefs 0 refcount change on invalid ref 1 ret -22 binder: 1597:1617 unknown command 0 binder: 1597:1617 ioctl c0306201 2000efd0 returned -22 binder: undelivered TRANSACTION_ERROR: 29201 binder: release 1597:1603 transaction 356 in, still active binder: send failed reply for transaction 356 to 1597:1617 binder: undelivered TRANSACTION_ERROR: 29189 netlink: 'syz-executor6': attribute type 10 has an invalid length. netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 'syz-executor6': attribute type 10 has an invalid length. device gre0 entered promiscuous mode device gre0 entered promiscuous mode SELinux: unknown mount option device gre0 entered promiscuous mode device gre0 entered promiscuous mode netlink: 'syz-executor4': attribute type 27 has an invalid length. IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready netlink: 'syz-executor4': attribute type 27 has an invalid length. IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready audit: type=1326 audit(1513380740.487:2635): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2142 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380740.487:2636): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2142 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380740.487:2637): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2142 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380740.487:2638): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2142 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=228 compat=0 ip=0x4557da code=0x7ffc0000 audit: type=1326 audit(1513380740.487:2639): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2142 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 rfkill: input handler disabled rfkill: input handler enabled pit: kvm: requested 4190 ns i8254 timer period limited to 500000 ns pit: kvm: requested 4190 ns i8254 timer period limited to 500000 ns loop_reread_partitions: partition scan of loop0 (Z QD'#Kn59ei5E O3}u8f~ F<) failed (rc=-13) binder: BINDER_SET_CONTEXT_MGR already set binder: 2310:2343 ioctl 40046207 0 returned -16 loop_reread_partitions: partition scan of loop0 (Z QD'#Kn59ei5E O3}u8f~ F<) failed (rc=-13) binder: 2310:2315 ioctl c0306201 20008fd0 returned -14 device gre0 entered promiscuous mode device gre0 entered promiscuous mode device syz1 entered promiscuous mode nla_parse: 12 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. kvm: pic: single mode not supported kvm: pic: level sensitive irq not supported SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=2476 comm=syz-executor5 netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. kauditd_printk_skb: 330 callbacks suppressed audit: type=1326 audit(1513380742.342:2970): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2971): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=283 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2972): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2973): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=32 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2974): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2975): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=9 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2976): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2977): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40cd71 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2978): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000 audit: type=1326 audit(1513380742.349:2979): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=2562 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=298 compat=0 ip=0x452a39 code=0x7ffc0000 netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 2747 Comm: syz-executor0 Not tainted 4.15.0-rc3+ #222 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3289 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3632 alloc_task_struct_node kernel/fork.c:156 [inline] dup_task_struct kernel/fork.c:521 [inline] copy_process.part.36+0x1a6a/0x4ae0 kernel/fork.c:1591 copy_process kernel/fork.c:1566 [inline] _do_fork+0x1ef/0xff0 kernel/fork.c:2045 SYSC_clone kernel/fork.c:2155 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2149 do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x452a39 RSP: 002b:00007f17cd1ccc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39 RDX: 00000000209c4ffc RSI: 0000000020e69000 RDI: 0000000030000100 RBP: 0000000000000047 R08: 0000000020a46000 R09: 0000000000000000 R10: 00000000201cc000 R11: 0000000000000212 R12: 00000000006ee748 R13: 0000000000000014 R14: 00007f17cd1cd6d4 R15: ffffffffffffffff FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 2767 Comm: syz-executor0 Not tainted 4.15.0-rc3+ #222 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3542 prepare_creds+0x78/0x360 kernel/cred.c:252 copy_creds+0x7b/0x3a0 kernel/cred.c:344 copy_process.part.36+0xb28/0x4ae0 kernel/fork.c:1624 copy_process kernel/fork.c:1566 [inline] _do_fork+0x1ef/0xff0 kernel/fork.c:2045 SYSC_clone kernel/fork.c:2155 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2149 do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x452a39 RSP: 002b:00007f17cd1ccc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39 RDX: 00000000209c4ffc RSI: 0000000020e69000 RDI: 0000000030000100 RBP: 0000000000000047 R08: 0000000020a46000 R09: 0000000000000000 R10: 00000000201cc000 R11: 0000000000000212 R12: 00000000006ee748 R13: 0000000000000014 R14: 00007f17cd1cd6d4 R15: ffffffffffffffff FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 2809 Comm: syz-executor0 Not tainted 4.15.0-rc3+ #222 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3542 prepare_creds+0x78/0x360 kernel/cred.c:252 copy_creds+0x7b/0x3a0 kernel/cred.c:344 copy_process.part.36+0xb28/0x4ae0 kernel/fork.c:1624 copy_process kernel/fork.c:1566 [inline] _do_fork+0x1ef/0xff0 kernel/fork.c:2045 SYSC_clone kernel/fork.c:2155 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2149 do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x452a39 RSP: 002b:00007f17cd1ccc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39 RDX: 00000000209c4ffc RSI: 0000000020e69000 RDI: 0000000030000100 RBP: 0000000000000047 R08: 0000000020a46000 R09: 0000000000000000 R10: 00000000201cc000 R11: 0000000000000212 R12: 00000000006ee748 R13: 0000000000000014 R14: 00007f17cd1cd6d4 R15: ffffffffffffffff FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 2816 Comm: syz-executor0 Not tainted 4.15.0-rc3+ #222 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] __do_kmalloc mm/slab.c:3706 [inline] __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3723 kmemdup+0x24/0x50 mm/util.c:118 kmemdup include/linux/string.h:417 [inline] selinux_cred_prepare+0x43/0xa0 security/selinux/hooks.c:3828 security_prepare_creds+0x7d/0xb0 security/security.c:1000 prepare_creds+0x2b1/0x360 kernel/cred.c:278 copy_creds+0x7b/0x3a0 kernel/cred.c:344 copy_process.part.36+0xb28/0x4ae0 kernel/fork.c:1624 copy_process kernel/fork.c:1566 [inline] _do_fork+0x1ef/0xff0 kernel/fork.c:2045 SYSC_clone kernel/fork.c:2155 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2149 do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x452a39 RSP: 002b:00007f17cd1ccc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39 RDX: 00000000209c4ffc RSI: 0000000020e69000 RDI: 0000000030000100 RBP: 0000000000000047 R08: 0000000020a46000 R09: 0000000000000000 R10: 00000000201cc000 R11: 0000000000000212 R12: 00000000006ee748 R13: 0000000000000014 R14: 00007f17cd1cd6d4 R15: ffffffffffffffff