Revision c7b285550544c22bc005ec20978472c9ac7138c6 authored by Al Viro on 08 March 2012, 17:51:19 UTC, committed by Linus Torvalds on 10 March 2012, 02:59:59 UTC
Current code has put_ioctx() called asynchronously from aio_fput_routine(); that's done *after* we have killed the request that used to pin ioctx, so there's nothing to stop io_destroy() waiting in wait_for_all_aios() from progressing. As the result, we can end up with async call of put_ioctx() being the last one and possibly happening during exit_mmap() or elf_core_dump(), neither of which expects stray munmap() being done to them... We do need to prevent _freeing_ ioctx until aio_fput_routine() is done with that, but that's all we care about - neither io_destroy() nor exit_aio() will progress past wait_for_all_aios() until aio_fput_routine() does really_put_req(), so the ioctx teardown won't be done until then and we don't care about the contents of ioctx past that point. Since actual freeing of these suckers is RCU-delayed, we don't need to bump ioctx refcount when request goes into list for async removal. All we need is rcu_read_lock held just over the ->ctx_lock-protected area in aio_fput_routine(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Acked-by: Benjamin LaHaise <bcrl@kvack.org> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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File | Mode | Size |
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async_tx | ||
Kconfig | -rw-r--r-- | 26.9 KB |
Makefile | -rw-r--r-- | 3.3 KB |
ablkcipher.c | -rw-r--r-- | 18.2 KB |
aead.c | -rw-r--r-- | 14.0 KB |
aes_generic.c | -rw-r--r-- | 61.9 KB |
af_alg.c | -rw-r--r-- | 9.3 KB |
ahash.c | -rw-r--r-- | 12.7 KB |
algapi.c | -rw-r--r-- | 19.6 KB |
algboss.c | -rw-r--r-- | 6.3 KB |
algif_hash.c | -rw-r--r-- | 6.8 KB |
algif_skcipher.c | -rw-r--r-- | 13.2 KB |
ansi_cprng.c | -rw-r--r-- | 11.1 KB |
anubis.c | -rw-r--r-- | 27.8 KB |
api.c | -rw-r--r-- | 13.4 KB |
arc4.c | -rw-r--r-- | 2.0 KB |
authenc.c | -rw-r--r-- | 19.6 KB |
authencesn.c | -rw-r--r-- | 23.4 KB |
blkcipher.c | -rw-r--r-- | 19.4 KB |
blowfish_common.c | -rw-r--r-- | 15.7 KB |
blowfish_generic.c | -rw-r--r-- | 3.4 KB |
camellia.c | -rw-r--r-- | 35.9 KB |
cast5.c | -rw-r--r-- | 33.0 KB |
cast6.c | -rw-r--r-- | 21.4 KB |
cbc.c | -rw-r--r-- | 7.4 KB |
ccm.c | -rw-r--r-- | 21.5 KB |
chainiv.c | -rw-r--r-- | 8.6 KB |
cipher.c | -rw-r--r-- | 3.3 KB |
compress.c | -rw-r--r-- | 1.3 KB |
crc32c.c | -rw-r--r-- | 8.0 KB |
cryptd.c | -rw-r--r-- | 24.8 KB |
crypto_null.c | -rw-r--r-- | 4.9 KB |
crypto_user.c | -rw-r--r-- | 10.0 KB |
crypto_wq.c | -rw-r--r-- | 968 bytes |
ctr.c | -rw-r--r-- | 10.8 KB |
cts.c | -rw-r--r-- | 9.8 KB |
deflate.c | -rw-r--r-- | 5.4 KB |
des_generic.c | -rw-r--r-- | 35.6 KB |
ecb.c | -rw-r--r-- | 4.9 KB |
eseqiv.c | -rw-r--r-- | 6.5 KB |
fcrypt.c | -rw-r--r-- | 18.0 KB |
fips.c | -rw-r--r-- | 705 bytes |
gcm.c | -rw-r--r-- | 34.5 KB |
gf128mul.c | -rw-r--r-- | 13.2 KB |
ghash-generic.c | -rw-r--r-- | 3.8 KB |
hmac.c | -rw-r--r-- | 6.9 KB |
internal.h | -rw-r--r-- | 4.0 KB |
khazad.c | -rw-r--r-- | 51.8 KB |
krng.c | -rw-r--r-- | 1.5 KB |
lrw.c | -rw-r--r-- | 9.2 KB |
lzo.c | -rw-r--r-- | 2.5 KB |
md4.c | -rw-r--r-- | 6.2 KB |
md5.c | -rw-r--r-- | 3.9 KB |
michael_mic.c | -rw-r--r-- | 3.6 KB |
pcbc.c | -rw-r--r-- | 7.7 KB |
pcompress.c | -rw-r--r-- | 3.0 KB |
pcrypt.c | -rw-r--r-- | 14.7 KB |
proc.c | -rw-r--r-- | 3.7 KB |
ripemd.h | -rw-r--r-- | 974 bytes |
rmd128.c | -rw-r--r-- | 10.2 KB |
rmd160.c | -rw-r--r-- | 12.6 KB |
rmd256.c | -rw-r--r-- | 10.5 KB |
rmd320.c | -rw-r--r-- | 13.1 KB |
rng.c | -rw-r--r-- | 3.3 KB |
salsa20_generic.c | -rw-r--r-- | 6.7 KB |
scatterwalk.c | -rw-r--r-- | 2.9 KB |
seed.c | -rw-r--r-- | 17.4 KB |
seqiv.c | -rw-r--r-- | 8.6 KB |
serpent_generic.c | -rw-r--r-- | 21.4 KB |
sha1_generic.c | -rw-r--r-- | 3.5 KB |
sha256_generic.c | -rw-r--r-- | 12.2 KB |
sha512_generic.c | -rw-r--r-- | 8.7 KB |
shash.c | -rw-r--r-- | 16.9 KB |
tcrypt.c | -rw-r--r-- | 36.5 KB |
tcrypt.h | -rw-r--r-- | 3.5 KB |
tea.c | -rw-r--r-- | 7.1 KB |
testmgr.c | -rw-r--r-- | 57.9 KB |
testmgr.h | -rw-r--r-- | 456.4 KB |
tgr192.c | -rw-r--r-- | 30.8 KB |
twofish_common.c | -rw-r--r-- | 37.8 KB |
twofish_generic.c | -rw-r--r-- | 6.3 KB |
vmac.c | -rw-r--r-- | 17.9 KB |
wp512.c | -rw-r--r-- | 60.1 KB |
xcbc.c | -rw-r--r-- | 7.2 KB |
xor.c | -rw-r--r-- | 3.9 KB |
xts.c | -rw-r--r-- | 8.7 KB |
zlib.c | -rw-r--r-- | 9.5 KB |
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