FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem ====================================================== WARNING: possible circular locking dependency detected 4.14.74+ #17 Not tainted ------------------------------------------------------ syz-executor4/15221 is trying to acquire lock: (&event->child_mutex){+.+.}, at: [] perf_event_for_each_child+0x82/0x150 kernel/events/core.c:4681 but task is already holding lock: (&cpuctx_mutex){+.+.}, at: [] perf_event_ctx_lock_nested+0x149/0x2f0 kernel/events/core.c:1240 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #8 (&cpuctx_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xf5/0x1480 kernel/locking/mutex.c:893 perf_event_init_cpu+0xab/0x150 kernel/events/core.c:11210 perf_event_init+0x295/0x2d4 kernel/events/core.c:11257 start_kernel+0x441/0x739 init/main.c:621 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 -> #7 (pmus_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xf5/0x1480 kernel/locking/mutex.c:893 perf_event_init_cpu+0x2c/0x150 kernel/events/core.c:11204 cpuhp_invoke_callback+0x1b5/0x1960 kernel/cpu.c:183 cpuhp_up_callbacks kernel/cpu.c:567 [inline] _cpu_up+0x22c/0x520 kernel/cpu.c:1126 do_cpu_up+0x13f/0x180 kernel/cpu.c:1160 smp_init+0x137/0x14b kernel/smp.c:578 kernel_init_freeable+0x186/0x39f init/main.c:1068 kernel_init+0xc/0x157 init/main.c:1000 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 -> #6 (cpu_hotplug_lock.rw_sem){++++}: 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+0x39/0xb0 kernel/cpu.c:294 get_online_cpus include/linux/cpu.h:138 [inline] lru_add_drain_all+0xa/0x20 mm/swap.c:729 shmem_wait_for_pins mm/shmem.c:2683 [inline] shmem_add_seals+0x4db/0x1230 mm/shmem.c:2791 shmem_fcntl+0xea/0x120 mm/shmem.c:2826 do_fcntl+0x966/0xea0 fs/fcntl.c:421 SYSC_fcntl fs/fcntl.c:463 [inline] SyS_fcntl+0xc7/0x100 fs/fcntl.c:448 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #5 (&sb->s_type->i_mutex_key#10){+.+.}: down_write+0x34/0x90 kernel/locking/rwsem.c:54 inode_lock include/linux/fs.h:713 [inline] shmem_fallocate+0x149/0xb20 mm/shmem.c:2852 ashmem_shrink_scan+0x1b6/0x4e0 drivers/staging/android/ashmem.c:453 ashmem_ioctl+0x2cc/0xe20 drivers/staging/android/ashmem.c:795 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1a0/0x1030 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7e/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #4 (ashmem_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xf5/0x1480 kernel/locking/mutex.c:893 ashmem_mmap+0x4c/0x430 drivers/staging/android/ashmem.c:369 call_mmap include/linux/fs.h:1787 [inline] mmap_region+0x836/0xfb0 mm/mmap.c:1731 do_mmap+0x551/0xb80 mm/mmap.c:1509 do_mmap_pgoff include/linux/mm.h:2167 [inline] vm_mmap_pgoff+0x180/0x1d0 mm/util.c:333 SYSC_mmap_pgoff mm/mmap.c:1559 [inline] SyS_mmap_pgoff+0xf8/0x1a0 mm/mmap.c:1517 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #3 (&mm->mmap_sem){++++}: __might_fault+0x137/0x1b0 mm/memory.c:4529 _copy_to_user+0x27/0xc0 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:155 [inline] filldir64+0x1c1/0x350 fs/readdir.c:282 dir_emit_dot include/linux/fs.h:3380 [inline] dir_emit_dots include/linux/fs.h:3391 [inline] dcache_readdir+0x12f/0x5d0 fs/libfs.c:192 iterate_dir+0x19f/0x5e0 fs/readdir.c:52 SYSC_getdents64 fs/readdir.c:315 [inline] SyS_getdents64+0x141/0x250 fs/readdir.c:296 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #2 (&sb->s_type->i_mutex_key#5){++++}: down_write+0x34/0x90 kernel/locking/rwsem.c:54 inode_lock include/linux/fs.h:713 [inline] start_creating.part.2+0x4c/0x160 fs/tracefs/inode.c:335 start_creating fs/tracefs/inode.c:324 [inline] tracefs_create_file+0x75/0x450 fs/tracefs/inode.c:400 create_event_toplevel_files+0x2d/0x150 kernel/trace/trace_events.c:2912 early_event_add_tracer kernel/trace/trace_events.c:2999 [inline] event_trace_init+0x30a/0x4e3 kernel/trace/trace_events.c:3164 do_one_initcall+0x99/0x1aa init/main.c:826 do_initcall_level init/main.c:892 [inline] do_initcalls init/main.c:900 [inline] do_basic_setup init/main.c:918 [inline] kernel_init_freeable+0x2df/0x39f init/main.c:1073 kernel_init+0xc/0x157 init/main.c:1000 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 -> #1 (event_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xf5/0x1480 kernel/locking/mutex.c:893 perf_trace_destroy+0x23/0x100 kernel/trace/trace_event_perf.c:234 _free_event+0x293/0xb00 kernel/events/core.c:4237 free_event+0x31/0x40 kernel/events/core.c:4264 perf_event_release_kernel+0x37b/0x890 kernel/events/core.c:4408 perf_release+0x33/0x40 kernel/events/core.c:4434 __fput+0x25e/0x6f0 fs/file_table.c:210 task_work_run+0x116/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x12e/0x150 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:267 [inline] do_syscall_64+0x35d/0x4b0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #0 (&event->child_mutex){+.+.}: lock_acquire+0x10f/0x380 kernel/locking/lockdep.c:3991 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xf5/0x1480 kernel/locking/mutex.c:893 perf_event_for_each_child+0x82/0x150 kernel/events/core.c:4681 _perf_ioctl kernel/events/core.c:4857 [inline] perf_ioctl+0x5de/0x1bb0 kernel/events/core.c:4869 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1a0/0x1030 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7e/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 other info that might help us debug this: Chain exists of: &event->child_mutex --> pmus_lock --> &cpuctx_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&cpuctx_mutex); lock(pmus_lock); lock(&cpuctx_mutex); lock(&event->child_mutex); *** DEADLOCK *** 1 lock held by syz-executor4/15221: #0: (&cpuctx_mutex){+.+.}, at: [] perf_event_ctx_lock_nested+0x149/0x2f0 kernel/events/core.c:1240 stack backtrace: CPU: 0 PID: 15221 Comm: syz-executor4 Not tainted 4.14.74+ #17 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 print_circular_bug.isra.18.cold.43+0x2d3/0x40c kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1901 [inline] check_prevs_add kernel/locking/lockdep.c:2018 [inline] validate_chain kernel/locking/lockdep.c:2460 [inline] __lock_acquire+0x2ff9/0x4320 kernel/locking/lockdep.c:3487 lock_acquire+0x10f/0x380 kernel/locking/lockdep.c:3991 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xf5/0x1480 kernel/locking/mutex.c:893 perf_event_for_each_child+0x82/0x150 kernel/events/core.c:4681 _perf_ioctl kernel/events/core.c:4857 [inline] perf_ioctl+0x5de/0x1bb0 kernel/events/core.c:4869 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1a0/0x1030 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7e/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457579 RSP: 002b:00007f5d374fac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000002403 RDI: 0000000000000006 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5d374fb6d4 R13: 00000000004c0605 R14: 00000000004d07f8 R15: 00000000ffffffff FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): Unrecognized mount option "8b.i[[+$\B-WJ&㵫 l:;>}WE4=$zzG+& r*aW[a>l`")_S{A(7kŧW!=U4%k\.׌ ;Wg]ᴡ0;N5I g~ȯD3jKm.z< yQhWI߬K4" or missing value FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem input: syz1 as /devices/virtual/input/input28 input: syz1 as /devices/virtual/input/input29 FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. binder_alloc: 7026: binder_alloc_buf, no vma binder: 15566:15569 transaction failed 29189/-3, size 0-0 line 3135 binder_alloc: 7026: binder_alloc_buf, no vma binder: 15566:15588 transaction failed 29189/-3, size 0-0 line 3135 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 FAT-fs (loop5): Can't find a valid FAT filesystem device lo entered promiscuous mode keychord: keycode 29300 out of range FAT-fs (loop1): Unrecognized mount option "AR*Qf5əeǓiEЄ*ss̀mE" [s뾀J+ ù+.K:rcfH_N8 ށlЯ{>URnI(r2i>Zt"T-^U_n x$Ut-O~wBF" or missing value FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem Y4`Ҙ: renamed from lo FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem binder: 15720:15725 got transaction to invalid handle binder: 15720:15725 transaction failed 29201/-22, size 0-0 line 3012 binder: BINDER_SET_CONTEXT_MGR already set binder: 15721:15726 ioctl 40046207 0 returned -16 binder_alloc: 7026: binder_alloc_buf, no vma binder: 15721:15726 transaction failed 29189/-3, size 0-0 line 3135 binder: 15721:15726 unknown command 134243083 binder: 15721:15726 ioctl c0306201 200000c0 returned -22 binder: 15721:15726 BC_FREE_BUFFER u0000000000000000 no match binder_alloc: 7026: binder_alloc_buf, no vma binder: 15721:15726 transaction failed 29189/-3, size 0-0 line 3135 binder_alloc: binder_alloc_mmap_handler: 15721 20001000-20004000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 15721:15726 ioctl 40046207 0 returned -16 binder_alloc: 7026: binder_alloc_buf, no vma binder: 15721:15727 transaction failed 29189/-3, size 0-0 line 3135 binder: 15721:15726 unknown command 134243083 binder: 15721:15726 ioctl c0306201 200000c0 returned -22 binder: 15721:15727 BC_FREE_BUFFER u0000000000000000 no match binder_alloc: 7026: binder_alloc_buf, no vma binder: 15721:15727 transaction failed 29189/-3, size 0-0 line 3135 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: hidraw0: HID v0.00 Device [syz1] on syz1 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: hidraw0: HID v0.00 Device [syz1] on syz1 FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem binder: undelivered TRANSACTION_ERROR: 29201 FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem SELinux: unrecognized netlink message: protocol=0 nlmsg_type=39240 sclass=netlink_route_socket pig=15863 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=39240 sclass=netlink_route_socket pig=15866 comm=syz-executor3 FAT-fs (loop1): Unrecognized mount option "jfs" or missing value FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem