https://github.com/torvalds/linux
Revision 8fb335e078378c8426fabeed1ebee1fbf915690c authored by Andrei Vagin on 01 February 2019, 22:20:24 UTC, committed by Linus Torvalds on 01 February 2019, 23:46:23 UTC
Currently, exit_ptrace() adds all ptraced tasks in a dead list, then
zap_pid_ns_processes() waits on all tasks in a current pidns, and only
then are tasks from the dead list released.
zap_pid_ns_processes() can get stuck on waiting tasks from the dead
list. In this case, we will have one unkillable process with one or
more dead children.
Thanks to Oleg for the advice to release tasks in find_child_reaper().
Link: http://lkml.kernel.org/r/20190110175200.12442-1-avagin@gmail.com
Fixes: 7c8bd2322c7f ("exit: ptrace: shift "reap dead" code from exit_ptrace() to forget_original_parent()")
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent a8e911d
Tip revision: 8fb335e078378c8426fabeed1ebee1fbf915690c authored by Andrei Vagin on 01 February 2019, 22:20:24 UTC
kernel/exit.c: release ptraced tasks before zap_pid_ns_processes
kernel/exit.c: release ptraced tasks before zap_pid_ns_processes
Tip revision: 8fb335e
| File | Mode | Size |
|---|---|---|
| 842 | ||
| fonts | ||
| lz4 | ||
| lzo | ||
| mpi | ||
| raid6 | ||
| reed_solomon | ||
| xz | ||
| zlib_deflate | ||
| zlib_inflate | ||
| zstd | ||
| .gitignore | -rw-r--r-- | 98 bytes |
| Kconfig | -rw-r--r-- | 14.0 KB |
| Kconfig.debug | -rw-r--r-- | 69.0 KB |
| Kconfig.kasan | -rw-r--r-- | 4.7 KB |
| Kconfig.kgdb | -rw-r--r-- | 4.1 KB |
| Kconfig.ubsan | -rw-r--r-- | 1.5 KB |
| Makefile | -rw-r--r-- | 8.9 KB |
| argv_split.c | -rw-r--r-- | 2.1 KB |
| ashldi3.c | -rw-r--r-- | 1.1 KB |
| ashrdi3.c | -rw-r--r-- | 1.2 KB |
| asn1_decoder.c | -rw-r--r-- | 13.4 KB |
| assoc_array.c | -rw-r--r-- | 51.9 KB |
| atomic64.c | -rw-r--r-- | 4.8 KB |
| atomic64_test.c | -rw-r--r-- | 6.6 KB |
| audit.c | -rw-r--r-- | 1.8 KB |
| bcd.c | -rw-r--r-- | 297 bytes |
| bch.c | -rw-r--r-- | 36.1 KB |
| bitmap.c | -rw-r--r-- | 35.8 KB |
| bitrev.c | -rw-r--r-- | 1.9 KB |
| bsearch.c | -rw-r--r-- | 1.5 KB |
| btree.c | -rw-r--r-- | 19.3 KB |
| bucket_locks.c | -rw-r--r-- | 1.4 KB |
| bug.c | -rw-r--r-- | 5.5 KB |
| build_OID_registry | -rwxr-xr-x | 4.7 KB |
| bust_spinlocks.c | -rw-r--r-- | 676 bytes |
| chacha.c | -rw-r--r-- | 3.8 KB |
| check_signature.c | -rw-r--r-- | 635 bytes |
| checksum.c | -rw-r--r-- | 5.0 KB |
| clz_ctz.c | -rw-r--r-- | 1.3 KB |
| clz_tab.c | -rw-r--r-- | 891 bytes |
| cmdline.c | -rw-r--r-- | 5.1 KB |
| cmpdi2.c | -rw-r--r-- | 1.1 KB |
| compat_audit.c | -rw-r--r-- | 832 bytes |
| cordic.c | -rw-r--r-- | 2.2 KB |
| cpu_rmap.c | -rw-r--r-- | 7.8 KB |
| cpumask.c | -rw-r--r-- | 5.8 KB |
| crc-ccitt.c | -rw-r--r-- | 5.7 KB |
| crc-itu-t.c | -rw-r--r-- | 2.8 KB |
| crc-t10dif.c | -rw-r--r-- | 3.0 KB |
| crc16.c | -rw-r--r-- | 2.8 KB |
| crc32.c | -rw-r--r-- | 9.3 KB |
| crc32defs.h | -rw-r--r-- | 1.6 KB |
| crc32test.c | -rw-r--r-- | 37.5 KB |
| crc4.c | -rw-r--r-- | 1.1 KB |
| crc64.c | -rw-r--r-- | 1.7 KB |
| crc7.c | -rw-r--r-- | 2.6 KB |
| crc8.c | -rw-r--r-- | 2.4 KB |
| ctype.c | -rw-r--r-- | 1.4 KB |
| debug_info.c | -rw-r--r-- | 777 bytes |
| debug_locks.c | -rw-r--r-- | 1.2 KB |
| debugobjects.c | -rw-r--r-- | 29.4 KB |
| dec_and_lock.c | -rw-r--r-- | 1.2 KB |
| decompress.c | -rw-r--r-- | 1.7 KB |
| decompress_bunzip2.c | -rw-r--r-- | 23.5 KB |
| decompress_inflate.c | -rw-r--r-- | 4.5 KB |
| decompress_unlz4.c | -rw-r--r-- | 4.2 KB |
| decompress_unlzma.c | -rw-r--r-- | 15.8 KB |
| decompress_unlzo.c | -rw-r--r-- | 7.1 KB |
| decompress_unxz.c | -rw-r--r-- | 10.9 KB |
| devres.c | -rw-r--r-- | 11.2 KB |
| digsig.c | -rw-r--r-- | 5.7 KB |
| div64.c | -rw-r--r-- | 4.3 KB |
| dump_stack.c | -rw-r--r-- | 3.0 KB |
| dynamic_debug.c | -rw-r--r-- | 25.5 KB |
| dynamic_queue_limits.c | -rw-r--r-- | 4.3 KB |
| earlycpio.c | -rw-r--r-- | 4.0 KB |
| error-inject.c | -rw-r--r-- | 5.4 KB |
| errseq.c | -rw-r--r-- | 6.6 KB |
| extable.c | -rw-r--r-- | 3.2 KB |
| fault-inject.c | -rw-r--r-- | 6.2 KB |
| fdt.c | -rw-r--r-- | 69 bytes |
| fdt_empty_tree.c | -rw-r--r-- | 80 bytes |
| fdt_ro.c | -rw-r--r-- | 72 bytes |
| fdt_rw.c | -rw-r--r-- | 72 bytes |
| fdt_strerror.c | -rw-r--r-- | 78 bytes |
| fdt_sw.c | -rw-r--r-- | 72 bytes |
| fdt_wip.c | -rw-r--r-- | 73 bytes |
| find_bit.c | -rw-r--r-- | 5.3 KB |
| find_bit_benchmark.c | -rw-r--r-- | 4.3 KB |
| flex_array.c | -rw-r--r-- | 11.0 KB |
| flex_proportions.c | -rw-r--r-- | 6.9 KB |
| gcd.c | -rw-r--r-- | 1.4 KB |
| gen_crc32table.c | -rw-r--r-- | 3.3 KB |
| gen_crc64table.c | -rw-r--r-- | 1.4 KB |
| genalloc.c | -rw-r--r-- | 21.9 KB |
| glob.c | -rw-r--r-- | 3.5 KB |
| globtest.c | -rw-r--r-- | 4.2 KB |
| hexdump.c | -rw-r--r-- | 8.3 KB |
| hweight.c | -rw-r--r-- | 2.0 KB |
| idr.c | -rw-r--r-- | 17.3 KB |
| inflate.c | -rw-r--r-- | 38.7 KB |
| int_sqrt.c | -rw-r--r-- | 1.1 KB |
| interval_tree.c | -rw-r--r-- | 499 bytes |
| interval_tree_test.c | -rw-r--r-- | 3.4 KB |
| iomap.c | -rw-r--r-- | 6.5 KB |
| iomap_copy.c | -rw-r--r-- | 2.8 KB |
| iommu-helper.c | -rw-r--r-- | 755 bytes |
| ioremap.c | -rw-r--r-- | 5.0 KB |
| iov_iter.c | -rw-r--r-- | 40.4 KB |
| irq_poll.c | -rw-r--r-- | 5.4 KB |
| irq_regs.c | -rw-r--r-- | 604 bytes |
| is_single_threaded.c | -rw-r--r-- | 1.4 KB |
| jedec_ddr_data.c | -rw-r--r-- | 3.0 KB |
| kasprintf.c | -rw-r--r-- | 1.4 KB |
| kfifo.c | -rw-r--r-- | 12.7 KB |
| klist.c | -rw-r--r-- | 10.4 KB |
| kobject.c | -rw-r--r-- | 26.8 KB |
| kobject_uevent.c | -rw-r--r-- | 18.7 KB |
| kstrtox.c | -rw-r--r-- | 10.5 KB |
| kstrtox.h | -rw-r--r-- | 293 bytes |
| lcm.c | -rw-r--r-- | 441 bytes |
| libcrc32c.c | -rw-r--r-- | 2.2 KB |
| list_debug.c | -rw-r--r-- | 1.8 KB |
| list_sort.c | -rw-r--r-- | 3.6 KB |
| llist.c | -rw-r--r-- | 3.1 KB |
| locking-selftest-hardirq.h | -rw-r--r-- | 246 bytes |
| locking-selftest-mutex.h | -rw-r--r-- | 159 bytes |
| locking-selftest-rlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock.h | -rw-r--r-- | 197 bytes |
| locking-selftest-rsem.h | -rw-r--r-- | 202 bytes |
| locking-selftest-rtmutex.h | -rw-r--r-- | 162 bytes |
| locking-selftest-softirq.h | -rw-r--r-- | 246 bytes |
| locking-selftest-spin-hardirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin-softirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin.h | -rw-r--r-- | 157 bytes |
| locking-selftest-wlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock.h | -rw-r--r-- | 197 bytes |
| locking-selftest-wsem.h | -rw-r--r-- | 202 bytes |
| locking-selftest.c | -rw-r--r-- | 43.7 KB |
| lockref.c | -rw-r--r-- | 4.4 KB |
| logic_pio.c | -rw-r--r-- | 7.7 KB |
| lru_cache.c | -rw-r--r-- | 19.4 KB |
| lshrdi3.c | -rw-r--r-- | 1.2 KB |
| memcat_p.c | -rw-r--r-- | 753 bytes |
| memory-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
| memweight.c | -rw-r--r-- | 1.0 KB |
| muldi3.c | -rw-r--r-- | 2.3 KB |
| net_utils.c | -rw-r--r-- | 640 bytes |
| netdev-notifier-error-inject.c | -rw-r--r-- | 1.5 KB |
| nlattr.c | -rw-r--r-- | 21.7 KB |
| nmi_backtrace.c | -rw-r--r-- | 3.0 KB |
| nodemask.c | -rw-r--r-- | 653 bytes |
| notifier-error-inject.c | -rw-r--r-- | 2.7 KB |
| notifier-error-inject.h | -rw-r--r-- | 653 bytes |
| objagg.c | -rw-r--r-- | 14.4 KB |
| of-reconfig-notifier-error-inject.c | -rw-r--r-- | 1.3 KB |
| oid_registry.c | -rw-r--r-- | 3.9 KB |
| once.c | -rw-r--r-- | 1.4 KB |
| parman.c | -rw-r--r-- | 10.6 KB |
| parser.c | -rw-r--r-- | 8.1 KB |
| pci_iomap.c | -rw-r--r-- | 4.2 KB |
| percpu-refcount.c | -rw-r--r-- | 13.3 KB |
| percpu_counter.c | -rw-r--r-- | 5.8 KB |
| percpu_test.c | -rw-r--r-- | 3.2 KB |
| plist.c | -rw-r--r-- | 5.9 KB |
| pm-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
| prime_numbers.c | -rw-r--r-- | 6.5 KB |
| radix-tree.c | -rw-r--r-- | 43.9 KB |
| random32.c | -rw-r--r-- | 12.8 KB |
| ratelimit.c | -rw-r--r-- | 1.6 KB |
| rational.c | -rw-r--r-- | 1.6 KB |
| rbtree.c | -rw-r--r-- | 18.7 KB |
| rbtree_test.c | -rw-r--r-- | 9.4 KB |
| reciprocal_div.c | -rw-r--r-- | 1.4 KB |
| refcount.c | -rw-r--r-- | 11.2 KB |
| rhashtable.c | -rw-r--r-- | 29.4 KB |
| sbitmap.c | -rw-r--r-- | 16.9 KB |
| scatterlist.c | -rw-r--r-- | 24.1 KB |
| seq_buf.c | -rw-r--r-- | 8.0 KB |
| sg_pool.c | -rw-r--r-- | 3.6 KB |
| sg_split.c | -rw-r--r-- | 5.1 KB |
| sha1.c | -rw-r--r-- | 6.1 KB |
| sha256.c | -rw-r--r-- | 10.1 KB |
| show_mem.c | -rw-r--r-- | 1.2 KB |
| siphash.c | -rw-r--r-- | 11.7 KB |
| smp_processor_id.c | -rw-r--r-- | 1.3 KB |
| sort.c | -rw-r--r-- | 2.5 KB |
| stackdepot.c | -rw-r--r-- | 8.8 KB |
| stmp_device.c | -rw-r--r-- | 2.1 KB |
| string.c | -rw-r--r-- | 22.4 KB |
| string_helpers.c | -rw-r--r-- | 13.5 KB |
| strncpy_from_user.c | -rw-r--r-- | 3.2 KB |
| strnlen_user.c | -rw-r--r-- | 3.5 KB |
| syscall.c | -rw-r--r-- | 2.7 KB |
| test-kstrtox.c | -rw-r--r-- | 17.3 KB |
| test-string_helpers.c | -rw-r--r-- | 10.3 KB |
| test_bitfield.c | -rw-r--r-- | 4.3 KB |
| test_bitmap.c | -rw-r--r-- | 9.6 KB |
| test_bpf.c | -rw-r--r-- | 159.2 KB |
| test_debug_virtual.c | -rw-r--r-- | 940 bytes |
| test_firmware.c | -rw-r--r-- | 21.6 KB |
| test_hash.c | -rw-r--r-- | 6.3 KB |
| test_hexdump.c | -rw-r--r-- | 6.3 KB |
| test_ida.c | -rw-r--r-- | 4.3 KB |
| test_kasan.c | -rw-r--r-- | 13.6 KB |
| test_kmod.c | -rw-r--r-- | 30.0 KB |
| test_list_sort.c | -rw-r--r-- | 3.3 KB |
| test_memcat_p.c | -rw-r--r-- | 2.2 KB |
| test_module.c | -rw-r--r-- | 753 bytes |
| test_objagg.c | -rw-r--r-- | 20.1 KB |
| test_overflow.c | -rw-r--r-- | 22.3 KB |
| test_parman.c | -rw-r--r-- | 11.2 KB |
| test_printf.c | -rw-r--r-- | 14.0 KB |
| test_rhashtable.c | -rw-r--r-- | 20.1 KB |
| test_siphash.c | -rw-r--r-- | 7.5 KB |
| test_sort.c | -rw-r--r-- | 829 bytes |
| test_static_key_base.c | -rw-r--r-- | 2.0 KB |
| test_static_keys.c | -rw-r--r-- | 6.0 KB |
| test_string.c | -rw-r--r-- | 2.4 KB |
| test_sysctl.c | -rw-r--r-- | 3.3 KB |
| test_ubsan.c | -rw-r--r-- | 2.5 KB |
| test_user_copy.c | -rw-r--r-- | 5.5 KB |
| test_uuid.c | -rw-r--r-- | 3.4 KB |
| test_xarray.c | -rw-r--r-- | 35.5 KB |
| textsearch.c | -rw-r--r-- | 9.5 KB |
| timerqueue.c | -rw-r--r-- | 3.3 KB |
| ts_bm.c | -rw-r--r-- | 5.3 KB |
| ts_fsm.c | -rw-r--r-- | 10.6 KB |
| ts_kmp.c | -rw-r--r-- | 4.3 KB |
| ubsan.c | -rw-r--r-- | 11.1 KB |
| ubsan.h | -rw-r--r-- | 1.7 KB |
| ucmpdi2.c | -rw-r--r-- | 1.2 KB |
| ucs2_string.c | -rw-r--r-- | 2.5 KB |
| usercopy.c | -rw-r--r-- | 737 bytes |
| uuid.c | -rw-r--r-- | 3.0 KB |
| vsprintf.c | -rw-r--r-- | 76.6 KB |
| win_minmax.c | -rw-r--r-- | 3.4 KB |
| xarray.c | -rw-r--r-- | 51.9 KB |
| xxhash.c | -rw-r--r-- | 12.7 KB |
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