Messages in this thread | | | From | Dmitry Vyukov <> | Date | Mon, 12 Feb 2018 16:03:58 +0100 | Subject | Re: possible deadlock in perf_trace_init (2) |
| |
On Sun, Dec 3, 2017 at 6:49 PM, syzbot <bot+7e57fd0c3d95aeefc7adc62e882baeae78e6d7fb@syzkaller.appspotmail.com> wrote: > Hello, > > syzkaller hit the following crash on > d127129e85a020879f334154300ddd3f7ec21c1e > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > > Unfortunately, I don't have any reproducer for this bug yet.
Another perf deadlock that involves splice, so:
#syz dup: possible deadlock in perf_event_ctx_lock_nested
> ====================================================== > WARNING: possible circular locking dependency detected > 4.15.0-rc1-next-20171129+ #55 Not tainted > ------------------------------------------------------ > syz-executor1/4270 is trying to acquire lock: > (event_mutex){+.+.}, at: [<ffffffff817809f8>] perf_trace_init+0x58/0xab0 > kernel/trace/trace_event_perf.c:216 > > but task is already holding lock: > (&ctx->mutex){+.+.}, at: [<ffffffff818740eb>] perf_event_init_context > kernel/events/core.c:10898 [inline] > (&ctx->mutex){+.+.}, at: [<ffffffff818740eb>] > perf_event_init_task+0x25b/0x890 kernel/events/core.c:10973 > > which lock already depends on the new lock. > > > the existing dependency chain (in reverse order) is: > > -> #8 (&ctx->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 > perf_event_ctx_lock_nested+0x21b/0x450 kernel/events/core.c:1249 > perf_event_ctx_lock kernel/events/core.c:1262 [inline] > perf_read+0xb9/0x970 kernel/events/core.c:4507 > do_loop_readv_writev fs/read_write.c:673 [inline] > do_iter_read+0x3db/0x5b0 fs/read_write.c:897 > vfs_readv+0x121/0x1c0 fs/read_write.c:959 > kernel_readv fs/splice.c:361 [inline] > default_file_splice_read+0x508/0xae0 fs/splice.c:416 > do_splice_to+0x110/0x170 fs/splice.c:880 > do_splice fs/splice.c:1173 [inline] > SYSC_splice fs/splice.c:1402 [inline] > SyS_splice+0x11a8/0x1630 fs/splice.c:1382 > entry_SYSCALL_64_fastpath+0x1f/0x96 > > -> #7 (&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 > > -> #6 (sb_writers){.+.+}: > finish_lock_switch kernel/sched/sched.h:1360 [inline] > finish_task_switch+0x1aa/0x740 kernel/sched/core.c:2667 > > -> #5 ((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:517 > > -> #4 (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:976 > start_kernel+0x6bc/0x74f init/main.c:698 > 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 > > -> #3 (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+0xa5/0x74f init/main.c:533 > 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 > > -> #2 (cpu_hotplug_lock.rw_sem){++++}: > 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 > static_key_slow_inc+0x9d/0x3c0 kernel/jump_label.c:123 > tracepoint_add_func kernel/tracepoint.c:222 [inline] > tracepoint_probe_register_prio+0x80d/0x9a0 kernel/tracepoint.c:282 > tracepoint_probe_register+0x2a/0x40 kernel/tracepoint.c:303 > trace_event_reg+0x167/0x320 kernel/trace/trace_events.c:305 > perf_trace_event_reg kernel/trace/trace_event_perf.c:122 [inline] > perf_trace_event_init kernel/trace/trace_event_perf.c:197 [inline] > perf_trace_init+0x4ef/0xab0 kernel/trace/trace_event_perf.c:221 > perf_tp_event_init+0x7d/0xf0 kernel/events/core.c:7956 > perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9189 > perf_init_event kernel/events/core.c:9227 [inline] > perf_event_alloc+0x1cc6/0x2b00 kernel/events/core.c:9491 > SYSC_perf_event_open+0x84e/0x2e00 kernel/events/core.c:9946 > SyS_perf_event_open+0x39/0x50 kernel/events/core.c:9832 > entry_SYSCALL_64_fastpath+0x1f/0x96 > > -> #1 (tracepoints_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 > tracepoint_probe_register_prio+0xa0/0x9a0 kernel/tracepoint.c:278 > tracepoint_probe_register+0x2a/0x40 kernel/tracepoint.c:303 > trace_event_reg+0x167/0x320 kernel/trace/trace_events.c:305 > perf_trace_event_reg kernel/trace/trace_event_perf.c:122 [inline] > perf_trace_event_init kernel/trace/trace_event_perf.c:197 [inline] > perf_trace_init+0x4ef/0xab0 kernel/trace/trace_event_perf.c:221 > perf_tp_event_init+0x7d/0xf0 kernel/events/core.c:7956 > perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9189 > perf_init_event kernel/events/core.c:9227 [inline] > perf_event_alloc+0x1cc6/0x2b00 kernel/events/core.c:9491 > SYSC_perf_event_open+0x84e/0x2e00 kernel/events/core.c:9946 > SyS_perf_event_open+0x39/0x50 kernel/events/core.c:9832 > entry_SYSCALL_64_fastpath+0x1f/0x96 > > -> #0 (event_mutex){+.+.}: > 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 > __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 > perf_trace_init+0x58/0xab0 kernel/trace/trace_event_perf.c:216 > perf_tp_event_init+0x7d/0xf0 kernel/events/core.c:7956 > perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9189 > perf_init_event kernel/events/core.c:9211 [inline] > perf_event_alloc+0x1005/0x2b00 kernel/events/core.c:9491 > inherit_event.isra.92+0x15b/0x920 kernel/events/core.c:10705 > inherit_group kernel/events/core.c:10796 [inline] > inherit_task_group.isra.94.part.95+0x73/0x240 > kernel/events/core.c:10854 > inherit_task_group kernel/events/core.c:10834 [inline] > perf_event_init_context kernel/events/core.c:10905 [inline] > perf_event_init_task+0x348/0x890 kernel/events/core.c:10973 > copy_process.part.35+0x1748/0x4b30 kernel/fork.c:1776 > copy_process kernel/fork.c:1615 [inline] > _do_fork+0x1ef/0xf10 kernel/fork.c:2096 > SYSC_clone kernel/fork.c:2203 [inline] > SyS_clone+0x37/0x50 kernel/fork.c:2197 > do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 > return_from_SYSCALL_64+0x0/0x75 > > other info that might help us debug this: > > Chain exists of: > event_mutex --> &pipe->mutex/1 --> &ctx->mutex > > Possible unsafe locking scenario: > > CPU0 CPU1 > ---- ---- > lock(&ctx->mutex); > lock(&pipe->mutex/1); > lock(&ctx->mutex); > lock(event_mutex); > > *** DEADLOCK *** > > 2 locks held by syz-executor1/4270: > #0: (&ctx->mutex){+.+.}, at: [<ffffffff818740eb>] perf_event_init_context > kernel/events/core.c:10898 [inline] > #0: (&ctx->mutex){+.+.}, at: [<ffffffff818740eb>] > perf_event_init_task+0x25b/0x890 kernel/events/core.c:10973 > #1: (&pmus_srcu){....}, at: [<ffffffff818570b5>] > perf_event_alloc+0xf55/0x2b00 kernel/events/core.c:9487 > > stack backtrace: > CPU: 1 PID: 4270 Comm: syz-executor1 Not tainted 4.15.0-rc1-next-20171129+ > #55 > 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 > __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 > perf_trace_init+0x58/0xab0 kernel/trace/trace_event_perf.c:216 > perf_tp_event_init+0x7d/0xf0 kernel/events/core.c:7956 > perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9189 > perf_init_event kernel/events/core.c:9211 [inline] > perf_event_alloc+0x1005/0x2b00 kernel/events/core.c:9491 > inherit_event.isra.92+0x15b/0x920 kernel/events/core.c:10705 > inherit_group kernel/events/core.c:10796 [inline] > inherit_task_group.isra.94.part.95+0x73/0x240 kernel/events/core.c:10854 > inherit_task_group kernel/events/core.c:10834 [inline] > perf_event_init_context kernel/events/core.c:10905 [inline] > perf_event_init_task+0x348/0x890 kernel/events/core.c:10973 > copy_process.part.35+0x1748/0x4b30 kernel/fork.c:1776 > copy_process kernel/fork.c:1615 [inline] > _do_fork+0x1ef/0xf10 kernel/fork.c:2096 > SYSC_clone kernel/fork.c:2203 [inline] > SyS_clone+0x37/0x50 kernel/fork.c:2197 > do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 > entry_SYSCALL64_slow_path+0x25/0x25 > RIP: 0033:0x455369 > RSP: 002b:0000000000a6f748 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 > RAX: ffffffffffffffda RBX: 00007f790b89c700 RCX: 0000000000455369 > RDX: 00007f790b89c9d0 RSI: 00007f790b89bdb0 RDI: 00000000003d0f00 > RBP: 0000000000a6f880 R08: 00007f790b89c700 R09: 00007f790b89c700 > R10: 00007f790b89c9d0 R11: 0000000000000202 R12: 0000000000000000 > R13: 0000000000a6f7ff R14: 00007f790b89c9c0 R15: 0000000000000014 > rfkill: input handler disabled > rfkill: input handler enabled > device lo entered promiscuous mode > encrypted_key: insufficient parameters specified > encrypted_key: insufficient parameters specified > device gre0 entered promiscuous mode > print_req_error: I/O error, dev loop0, sector 4 > print_req_error: I/O error, dev loop0, sector 4 > binder: 4590:4594 transaction failed 29189/-22, size 0-32 line 2832 > binder: 4590:4594 transaction failed 29189/-22, size 0-32 line 2832 > kauditd_printk_skb: 427 callbacks suppressed > audit: type=1326 audit(1511971831.715:438): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj=kernel pid=4761 comm="syz-executor0" > exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 > ip=0x4529d9 code=0xffff0000 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4825 comm=syz-executor0 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4834 comm=syz-executor0 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4834 comm=syz-executor0 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4834 comm=syz-executor0 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4834 comm=syz-executor0 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4834 comm=syz-executor0 > FAULT_INJECTION: forcing a failure. > name failslab, interval 1, probability 0, space 0, times 1 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4888 comm=syz-executor0 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4888 comm=syz-executor0 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4888 comm=syz-executor0 > CPU: 1 PID: 4882 Comm: syz-executor1 Not tainted 4.15.0-rc1-next-20171129+ > #55 > 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:425 [inline] > slab_alloc mm/slab.c:3372 [inline] > kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 > ptlock_alloc+0x24/0x70 mm/memory.c:4673 > ptlock_init include/linux/mm.h:1790 [inline] > pgtable_page_ctor include/linux/mm.h:1824 [inline] > pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 > do_huge_pmd_anonymous_page+0xbbe/0x19e0 mm/huge_memory.c:692 > create_huge_pmd mm/memory.c:3816 [inline] > __handle_mm_fault+0x1bd6/0x3e60 mm/memory.c:4019 > handle_mm_fault+0x38f/0x930 mm/memory.c:4085 > __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 > do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 > page_fault+0x4c/0x60 arch/x86/entry/entry_64.S:1230 > RIP: 0033:0x401819 > RSP: 002b:00007f790b8bcb90 EFLAGS: 00010246 > RAX: 0000000020000000 RBX: 000000000000004a RCX: 0000000000000000 > RDX: 209c2a81117b8a5f RSI: 0000000000000000 RDI: 00007f790b8bd608 > RBP: 000000002078d000 R08: 0000000000000000 R09: 0000000000000000 > R10: 000000000000004a R11: 0000000000000000 R12: 00000000006f54e8 > R13: 0000000000000013 R14: 00007f790b8bd6d4 R15: ffffffffffffffff > oom_reaper: reaped process 4882 (syz-executor1), now anon-rss:0kB, > file-rss:0kB, shmem-rss:0kB > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > sclass=netlink_route_socket pig=4888 comm=syz-executor0 > QAT: Invalid ioctl > QAT: Invalid ioctl > FAULT_INJECTION: forcing a failure. > name failslab, interval 1, probability 0, space 0, times 0 > CPU: 0 PID: 5697 Comm: syz-executor7 Not tainted 4.15.0-rc1-next-20171129+ > #55 > 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:425 [inline] > slab_alloc mm/slab.c:3372 [inline] > kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 > ptlock_alloc+0x24/0x70 mm/memory.c:4673 > ptlock_init include/linux/mm.h:1790 [inline] > pgtable_page_ctor include/linux/mm.h:1824 [inline] > pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 > __do_huge_pmd_anonymous_page mm/huge_memory.c:567 [inline] > do_huge_pmd_anonymous_page+0x554/0x19e0 mm/huge_memory.c:731 > create_huge_pmd mm/memory.c:3816 [inline] > __handle_mm_fault+0x1bd6/0x3e60 mm/memory.c:4019 > handle_mm_fault+0x38f/0x930 mm/memory.c:4085 > __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 > do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 > page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1230 > RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 > arch/x86/lib/copy_user_64.S:180 > RSP: 0018:ffff8801c917fd88 EFLAGS: 00010202 > RAX: ffffed003922ffda RBX: 0000000000000078 RCX: 0000000000000078 > RDX: 0000000000000078 RSI: ffff8801c917fe58 RDI: 0000000020dcbfbc > RBP: ffff8801c917fdb8 R08: ffffed003922ffda R09: ffffed003922ffda > R10: 000000000000000f R11: ffffed003922ffd9 R12: 0000000020dcbfbc > R13: ffff8801c917fe58 R14: 00007ffffffff000 R15: 0000000020dcc034 > copy_to_user include/linux/uaccess.h:155 [inline] > copy_msqid_to_user.constprop.9+0x22/0x30 ipc/msg.c:288 > SYSC_msgctl+0x212/0x290 ipc/msg.c:557 > SyS_msgctl+0x24/0x30 ipc/msg.c:528 > entry_SYSCALL_64_fastpath+0x1f/0x96 > RIP: 0033:0x4529d9 > RSP: 002b:00007f7af2813c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000047 > RAX: ffffffffffffffda RBX: 00007f7af2813aa0 RCX: 00000000004529d9 > RDX: 0000000020dcbfbc RSI: 0000000000000002 RDI: 0000000000000000 > RBP: 00007f7af2813a90 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b759b > R13: 00007f7af2813bc8 R14: 00000000004b759b R15: 0000000000000000 > FAULT_INJECTION: forcing a failure. > name failslab, interval 1, probability 0, space 0, times 0 > CPU: 0 PID: 5810 Comm: syz-executor2 Not tainted 4.15.0-rc1-next-20171129+ > #55 > 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:425 [inline] > slab_alloc mm/slab.c:3372 [inline] > kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 > __sigqueue_alloc+0x329/0x660 kernel/signal.c:386 > __send_signal+0x2e8/0x17a0 kernel/signal.c:1041 > send_signal+0x4a/0xc0 kernel/signal.c:1107 > specific_send_sig_info kernel/signal.c:1152 [inline] > force_sig_info+0x242/0x340 kernel/signal.c:1204 > force_sig_info_fault.constprop.32+0x289/0x450 arch/x86/mm/fault.c:223 > __bad_area_nosemaphore+0x1d2/0x3e0 arch/x86/mm/fault.c:923 > __bad_area+0x151/0x1f0 arch/x86/mm/fault.c:957 > bad_area_access_error+0x166/0x240 arch/x86/mm/fault.c:996 > __do_page_fault+0x3d1/0xc90 arch/x86/mm/fault.c:1409 > do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 > page_fault+0x4c/0x60 arch/x86/entry/entry_64.S:1230 > RIP: 0033:0x44c5a0 > RSP: 002b:00007f771dbdd788 EFLAGS: 00010206 > RAX: 00007f771dbdd830 RBX: 0000000000758020 RCX: 0000000000000003 > RDX: 0000000000000400 RSI: 0000000020fd7ff0 RDI: 00007f771dbdd830 > RBP: 00000000000005a5 R08: 0000000000000400 R09: 0000000000000000 > R10: 0000000020fd7ff3 R11: 0000000000000000 R12: 00000000006f5818 > R13: 0000000000000014 R14: 00007f771dbde6d4 R15: ffffffffffffffff > FAULT_INJECTION: forcing a failure. > name failslab, interval 1, probability 0, space 0, times 0 > CPU: 0 PID: 5826 Comm: syz-executor2 Not tainted 4.15.0-rc1-next-20171129+ > #55 > 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:425 [inline] > slab_alloc mm/slab.c:3372 [inline] > kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 > getname_flags+0xcb/0x580 fs/namei.c:138 > getname+0x19/0x20 fs/namei.c:209 > do_sys_open+0x2e7/0x6d0 fs/open.c:1053 > SYSC_open fs/open.c:1077 [inline] > SyS_open+0x2d/0x40 fs/open.c:1072 > entry_SYSCALL_64_fastpath+0x1f/0x96 > RIP: 0033:0x40cd11 > RSP: 002b:00007f771dbdd780 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 > RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 000000000040cd11 > RDX: 0000000000000000 RSI: 0000000072be4c3d RDI: 00007f771dbdd830 > RBP: 00000000000005a5 R08: 00007f771dbdd790 R09: 00000000000005a5 > R10: 0000000020fd7ff3 R11: 0000000000000293 R12: 00000000006f5818 > R13: 0000000000000014 R14: 00007f771dbde6d4 R15: ffffffffffffffff > FAULT_INJECTION: forcing a failure. > name fail_page_alloc, interval 1, probability 0, space 0, times 1 > CPU: 1 PID: 5857 Comm: syz-executor2 Not tainted 4.15.0-rc1-next-20171129+ > #55 > 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_fail_alloc_page mm/page_alloc.c:2943 [inline] > prepare_alloc_pages mm/page_alloc.c:4196 [inline] > __alloc_pages_nodemask+0x338/0xd80 mm/page_alloc.c:4235 > __alloc_pages include/linux/gfp.h:456 [inline] > __alloc_pages_node include/linux/gfp.h:469 [inline] > kmem_getpages mm/slab.c:1414 [inline] > cache_grow_begin+0x72/0x570 mm/slab.c:2672 > cache_alloc_refill mm/slab.c:3039 [inline] > ____cache_alloc mm/slab.c:3121 [inline] > __do_cache_alloc mm/slab.c:3343 [inline] > slab_alloc mm/slab.c:3378 [inline] > kmem_cache_alloc+0x403/0x760 mm/slab.c:3546 > getname_flags+0xcb/0x580 fs/namei.c:138 > getname+0x19/0x20 fs/namei.c:209 > do_sys_open+0x2e7/0x6d0 fs/open.c:1053 > SYSC_open fs/open.c:1077 [inline] > SyS_open+0x2d/0x40 fs/open.c:1072 > entry_SYSCALL_64_fastpath+0x1f/0x96 > RIP: 0033:0x40cd11 > RSP: 002b:00007f771dbdd780 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 > RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 000000000040cd11 > RDX: 0000000000000000 RSI: 0000000072be4c3d RDI: 00007f771dbdd830 > RBP: 00000000000005a5 R08: 00007f771dbdd790 R09: 00000000000005a5 > R10: 0000000020fd7ff3 R11: 0000000000000293 R12: 00000000006f5818 > R13: 0000000000000014 R14: 00007f771dbde6d4 R15: ffffffffffffffff > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@googlegroups.com. > Please credit me with: Reported-by: syzbot <syzkaller@googlegroups.com> > > syzbot will keep track of this bug report. > Once a fix for this bug is committed, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line in the email body. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/001a1144d1c890d9fa055f73370d%40google.com. > For more options, visit https://groups.google.com/d/optout.
| |