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linux/lib
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Sasha Levin 05efa8c943 random32: avoid attempt to late reseed if in the middle of seeding 
Commit 4af712e8df ("random32: add prandom_reseed_late() and call when
nonblocking pool becomes initialized") has added a late reseed stage
that happens as soon as the nonblocking pool is marked as initialized.

This fails in the case that the nonblocking pool gets initialized
during __prandom_reseed()'s call to get_random_bytes(). In that case
we'd double back into __prandom_reseed() in an attempt to do a late
reseed - deadlocking on 'lock' early on in the boot process.

Instead, just avoid even waiting to do a reseed if a reseed is already
occuring.

Fixes: 4af712e8df ("random32: add prandom_reseed_late() and call when nonblocking pool becomes initialized")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-28 16:04:19 -04:00
..
fonts partly revert commit 8a10bc9: parisc/sti_console: prefer Linux fonts over built-in ROM fonts 2014-03-23 16:44:42 +01:00
lz4 lz4: fix compression/decompression signedness mismatch 2013-09-11 15:59:45 -07:00
lzo lib/lzo: Update LZO compression to current upstream version 2013-02-20 19:36:01 +01:00
mpi MPILIB: add module description and license 2013-09-25 17:17:01 +01:00
raid6 md update for v3.12 2013-09-10 13:03:41 -07:00
reed_solomon
xz decompressors: fix typo "POWERPC" 2013-03-13 15:21:48 -07:00
zlib_deflate
zlib_inflate
.gitignore X.509: Implement simple static OID registry 2012-10-08 13:50:18 +10:30
argv_split.c argv_split(): teach it to handle mutable strings 2013-04-29 18:28:19 -07:00
asn1_decoder.c Nothing all that exciting; a new module-from-fd syscall for those who want 2012-12-19 07:55:08 -08:00
assoc_array.c assoc_array: remove global variable 2014-01-23 09:25:10 -08:00
atomic64_test.c
atomic64.c lib: atomic64: Initialize locks statically to fix early users 2012-12-20 13:50:16 -08:00
audit.c
average.c lib: Ensure EWMA does not store wrong intermediate values 2014-01-16 23:46:06 -08:00
bcd.c
bch.c
bitmap.c propagate name change to comments in kernel source 2012-12-06 10:39:54 +01:00
bitrev.c
bsearch.c
btree.c
bug.c taint: add explicit flag to show whether lock dep is still OK. 2013-01-21 17:17:57 +10:30
build_OID_registry X.509: do not emit any informational output 2013-06-19 17:54:06 +02:00
bust_spinlocks.c printk: Provide a wake_up_klogd() off-case 2013-03-22 16:41:20 -07:00
check_signature.c
checksum.c asm-generic headers: Allow yet more arch overrides in checksum.h 2013-02-11 20:00:33 +05:30
clz_ctz.c lib: add weak clz/ctz functions 2013-07-09 10:33:30 -07:00
clz_tab.c
cmdline.c lib/cmdline.c: declare exported symbols immediately 2014-01-23 16:36:57 -08:00
cordic.c
cpu_rmap.c Remove GENERIC_HARDIRQ config option 2013-09-13 15:09:52 +02:00
cpu-notifier-error-inject.c
cpumask.c lib/cpumask.c: use memblock apis for early memory allocations 2014-01-21 16:19:47 -08:00
crc7.c
crc8.c
crc16.c
crc32.c lib: crc32: reduce number of cases for crc32{, c}_combine 2013-11-04 15:27:08 -05:00
crc32defs.h
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c crypto: crct10dif - Add fallback for broken initrds 2013-09-12 15:31:34 +10:00
ctype.c
debug_locks.c mutex: Add support for wound/wait style locks 2013-06-26 12:10:56 +02:00
debugobjects.c lib/debugobjects.c: remove unnecessary work pending test 2013-11-13 12:09:22 +09:00
dec_and_lock.c
decompress_bunzip2.c
decompress_inflate.c lib/decompressors: fix "no limit" output buffer length 2013-09-11 15:58:38 -07:00
decompress_unlz4.c lib/decompress_unlz4.c: always set an error return code on failures 2014-01-23 16:37:04 -08:00
decompress_unlzma.c
decompress_unlzo.c lib/lzo: Rename lzo1x_decompress.c to lzo1x_decompress_safe.c 2013-02-20 19:36:00 +01:00
decompress_unxz.c
decompress.c lib: add support for LZ4-compressed kernel 2013-07-09 10:33:30 -07:00
devres.c lib/devres.c: fix misplaced #endif 2013-02-27 19:10:09 -08:00
digsig.c lib/digsig.c: use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...)) 2013-11-13 12:09:22 +09:00
div64.c math64: New separate div64_u64_rem helper 2013-08-23 09:02:14 -04:00
dma-debug.c dma debug: account for cachelines and read-only mappings in overlap tracking 2014-03-04 07:55:47 -08:00
dump_stack.c x86, asmlinkage: Make dump_stack visible 2013-08-06 14:21:01 -07:00
dynamic_debug.c dynamic_debug: replace obselete simple_strtoul() with kstrtouint() 2014-01-27 21:02:39 -08:00
dynamic_queue_limits.c
earlycpio.c earlycpio.c: Fix the confusing comment of find_cpio_data(). 2013-08-14 23:24:01 +02:00
extable.c
fault-inject.c debugfs: add get/set for atomic types 2013-06-03 13:55:01 -07:00
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
fdt.c
find_last_bit.c
find_next_bit.c
flex_array.c reciprocal_divide: update/correction of the algorithm 2014-01-21 23:17:20 -08:00
flex_proportions.c
gcd.c lib/gcd.c: prevent possible div by 0 2012-10-06 03:04:57 +09:00
gen_crc32table.c sections: fix const sections for crc32 table 2012-10-06 03:04:46 +09:00
genalloc.c lib/genalloc.c: add check gen_pool_dma_alloc() if dma pointer is not NULL 2014-01-29 16:22:39 -08:00
halfmd4.c
hash.c lib: hash: follow-up fixups for arch hash 2013-12-19 00:14:53 -05:00
hexdump.c lib: introduce upper case hex ascii helpers 2013-09-20 15:38:26 -04:00
hweight.c
idr.c idr: print a stack dump after ida_remove warning 2013-07-03 16:08:04 -07:00
inflate.c
int_sqrt.c lib/int_sqrt.c: optimize square root algorithm 2013-04-29 18:28:19 -07:00
interval_tree_test_main.c random32: rename random32 to prandom 2012-12-17 17:15:26 -08:00
interval_tree.c mm: interval tree updates 2012-10-09 16:22:40 +09:00
iomap_copy.c
iomap.c
iommu-helper.c
ioremap.c
iovec.c Hoist memcpy_fromiovec/memcpy_toiovec into lib/ 2013-05-20 10:24:22 +09:30
irq_regs.c
is_single_threaded.c
jedec_ddr_data.c
kasprintf.c lib/kasprintf.c: use kmalloc_track_caller() to get accurate traces for kvasprintf 2012-10-11 08:50:15 +09:00
Kconfig Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2013-11-21 19:46:00 -08:00
Kconfig.debug kbuild: don't enable DEBUG_INFO when building for COMPILE_TEST 2014-02-04 12:20:01 -08:00
Kconfig.kgdb treewide: Fix typo in printk 2013-06-18 13:48:45 +02:00
Kconfig.kmemcheck
kfifo.c kfifo: kfifo_copy_{to,from}_user: fix copied bytes calculation 2013-11-15 09:32:23 +09:00
klist.c klist: del waiter from klist_remove_waiters before wakeup waitting process 2013-05-21 10:16:39 -07:00
kobject_uevent.c net: fix "queues" uevent between network namespaces 2014-01-19 20:02:02 -08:00
kobject.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2014-01-30 20:08:20 -08:00
kstrtox.c lib/kstrtox.c: remove redundant cleanup 2014-01-23 16:36:57 -08:00
kstrtox.h
lcm.c
libcrc32c.c
list_debug.c
list_sort.c lib/: rename random32() to prandom_u32() 2013-04-29 18:28:42 -07:00
llist.c llists-move-llist_reverse_order-from-raid5-to-llistc-fix 2013-11-15 09:32:22 +09:00
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c sched: Introduce preempt_count accessor functions 2013-09-25 14:07:32 +02:00
lockref.c lockref: include mutex.h rather than reinvent arch_mutex_cpu_relax 2013-11-27 20:37:33 -08:00
lru_cache.c lru_cache: introduce lc_get_cumulative() 2013-03-22 22:17:36 -06:00
Makefile * Avoid WARN_ON() when mapping BGRT on Baytrail (EFI 32-bit). 2014-02-07 11:27:30 -08:00
md5.c
memory-notifier-error-inject.c
memweight.c
net_utils.c net: core: move mac_pton() to lib/net_utils.c 2013-06-05 12:00:27 -07:00
nlattr.c
notifier-error-inject.c mode_t, whack-a-mole at 11... 2013-04-09 14:13:05 -04:00
notifier-error-inject.h
of-reconfig-notifier-error-inject.c powerpc+of: Rename and fix OF reconfig notifier error inject module 2012-12-14 10:32:52 +11:00
oid_registry.c Give the OID registry file module info to avoid kernel tainting 2013-05-05 14:38:00 -07:00
parser.c lib/parser.c: put EXPORT_SYMBOLs in the conventional place 2014-01-23 16:36:55 -08:00
pci_iomap.c
percpu_counter.c percpu_counter: unbreak __percpu_counter_add() 2014-01-17 11:32:24 +11:00
percpu_ida.c Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2014-02-14 10:45:18 -08:00
percpu_test.c percpu: add test module for various percpu operations 2013-11-13 12:09:11 +09:00
percpu-refcount.c percpu-refcount: Add a WARN() for ref going negative 2014-01-21 04:40:56 -05:00
plist.c lib/plist.c: make plist test announcements KERN_DEBUG 2012-10-06 03:04:58 +09:00
pm-notifier-error-inject.c
prio_heap.c
proportions.c
radix-tree.c lib/radix-tree.c: swapoff tmpfs radix_tree: remember to rcu_read_unlock 2014-03-04 07:55:47 -08:00
random32.c random32: avoid attempt to late reseed if in the middle of seeding 2014-03-28 16:04:19 -04:00
ratelimit.c
rational.c
rbtree_test.c rbtree/test: test rbtree_postorder_for_each_entry_safe() 2014-01-23 16:37:03 -08:00
rbtree.c rbtree: add postorder iteration functions 2013-09-11 15:59:19 -07:00
reciprocal_div.c reciprocal_divide: update/correction of the algorithm 2014-01-21 23:17:20 -08:00
scatterlist.c lib/scatterlist: export sg_miter_skip() 2013-12-08 17:56:37 -08:00
sha1.c
show_mem.c lib/show_mem.c: show num_poisoned_pages when oom 2014-01-21 16:19:48 -08:00
smp_processor_id.c sched: Introduce preempt_count accessor functions 2013-09-25 14:07:32 +02:00
sort.c
stmp_device.c
string_helpers.c lib/string_helpers: introduce generic string_unescape 2013-04-30 17:04:03 -07:00
string.c
strncpy_from_user.c
strnlen_user.c
swiotlb.c memblock, nobootmem: add memblock_virt_alloc_low() 2014-01-27 21:02:38 -08:00
syscall.c
test_module.c test: add minimal module for verification testing 2014-01-23 16:36:57 -08:00
test_user_copy.c test: check copy_to/from_user boundary validation 2014-01-23 16:36:57 -08:00
test-kstrtox.c
test-string_helpers.c lib/string_helpers: introduce generic string_unescape 2013-04-30 17:04:03 -07:00
textsearch.c
timerqueue.c
ts_bm.c
ts_fsm.c
ts_kmp.c
ucs2_string.c Move utf16 functions to kernel core and rename 2013-04-15 21:23:03 +01:00
usercopy.c Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 2013-04-30 17:04:09 -07:00
uuid.c uuid: use prandom_bytes() 2013-04-29 18:28:42 -07:00
vsprintf.c vsprintf: add %pad extension for dma_addr_t use 2014-01-23 16:36:56 -08:00