Revision 9c1177b62a8c7f78fee5ede540825b844a1bf0c8 authored by Qian Cai on 15 August 2020, 00:31:47 UTC, committed by Linus Torvalds on 15 August 2020, 02:56:57 UTC
mm->tlb_flush_batched could be accessed concurrently as noticed by KCSAN, BUG: KCSAN: data-race in flush_tlb_batched_pending / try_to_unmap_one write to 0xffff93f754880bd0 of 1 bytes by task 822 on cpu 6: try_to_unmap_one+0x59a/0x1ab0 set_tlb_ubc_flush_pending at mm/rmap.c:635 (inlined by) try_to_unmap_one at mm/rmap.c:1538 rmap_walk_anon+0x296/0x650 rmap_walk+0xdf/0x100 try_to_unmap+0x18a/0x2f0 shrink_page_list+0xef6/0x2870 shrink_inactive_list+0x316/0x880 shrink_lruvec+0x8dc/0x1380 shrink_node+0x317/0xd80 balance_pgdat+0x652/0xd90 kswapd+0x396/0x8d0 kthread+0x1e0/0x200 ret_from_fork+0x27/0x50 read to 0xffff93f754880bd0 of 1 bytes by task 6364 on cpu 4: flush_tlb_batched_pending+0x29/0x90 flush_tlb_batched_pending at mm/rmap.c:682 change_p4d_range+0x5dd/0x1030 change_pte_range at mm/mprotect.c:44 (inlined by) change_pmd_range at mm/mprotect.c:212 (inlined by) change_pud_range at mm/mprotect.c:240 (inlined by) change_p4d_range at mm/mprotect.c:260 change_protection+0x222/0x310 change_prot_numa+0x3e/0x60 task_numa_work+0x219/0x350 task_work_run+0xed/0x140 prepare_exit_to_usermode+0x2cc/0x2e0 ret_from_intr+0x32/0x42 Reported by Kernel Concurrency Sanitizer on: CPU: 4 PID: 6364 Comm: mtest01 Tainted: G W L 5.5.0-next-20200210+ #5 Hardware name: HPE ProLiant DL385 Gen10/ProLiant DL385 Gen10, BIOS A40 07/10/2019 flush_tlb_batched_pending() is under PTL but the write is not, but mm->tlb_flush_batched is only a bool type, so the value is unlikely to be shattered. Thus, mark it as an intentional data race by using the data race macro. Signed-off-by: Qian Cai <cai@lca.pw> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Marco Elver <elver@google.com> Link: http://lkml.kernel.org/r/1581450783-8262-1-git-send-email-cai@lca.pw Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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File | Mode | Size |
---|---|---|
asymmetric_keys | ||
async_tx | ||
842.c | -rw-r--r-- | 3.7 KB |
Kconfig | -rw-r--r-- | 54.8 KB |
Makefile | -rw-r--r-- | 7.4 KB |
acompress.c | -rw-r--r-- | 4.7 KB |
adiantum.c | -rw-r--r-- | 19.4 KB |
aead.c | -rw-r--r-- | 7.2 KB |
aegis.h | -rw-r--r-- | 1.8 KB |
aegis128-core.c | -rw-r--r-- | 13.1 KB |
aegis128-neon-inner.c | -rw-r--r-- | 6.3 KB |
aegis128-neon.c | -rw-r--r-- | 1.9 KB |
aes_generic.c | -rw-r--r-- | 57.6 KB |
aes_ti.c | -rw-r--r-- | 2.0 KB |
af_alg.c | -rw-r--r-- | 25.7 KB |
ahash.c | -rw-r--r-- | 16.2 KB |
akcipher.c | -rw-r--r-- | 4.0 KB |
algapi.c | -rw-r--r-- | 29.5 KB |
algboss.c | -rw-r--r-- | 5.9 KB |
algif_aead.c | -rw-r--r-- | 15.6 KB |
algif_hash.c | -rw-r--r-- | 9.5 KB |
algif_rng.c | -rw-r--r-- | 5.1 KB |
algif_skcipher.c | -rw-r--r-- | 9.6 KB |
ansi_cprng.c | -rw-r--r-- | 10.7 KB |
anubis.c | -rw-r--r-- | 27.8 KB |
api.c | -rw-r--r-- | 13.8 KB |
arc4.c | -rw-r--r-- | 1.8 KB |
authenc.c | -rw-r--r-- | 13.1 KB |
authencesn.c | -rw-r--r-- | 14.2 KB |
blake2b_generic.c | -rw-r--r-- | 9.3 KB |
blake2s_generic.c | -rw-r--r-- | 5.0 KB |
blowfish_common.c | -rw-r--r-- | 15.5 KB |
blowfish_generic.c | -rw-r--r-- | 3.2 KB |
camellia_generic.c | -rw-r--r-- | 34.2 KB |
cast5_generic.c | -rw-r--r-- | 20.5 KB |
cast6_generic.c | -rw-r--r-- | 9.1 KB |
cast_common.c | -rw-r--r-- | 12.9 KB |
cbc.c | -rw-r--r-- | 2.2 KB |
ccm.c | -rw-r--r-- | 23.4 KB |
cfb.c | -rw-r--r-- | 6.1 KB |
chacha20poly1305.c | -rw-r--r-- | 17.7 KB |
chacha_generic.c | -rw-r--r-- | 3.9 KB |
cipher.c | -rw-r--r-- | 2.5 KB |
cmac.c | -rw-r--r-- | 7.5 KB |
compress.c | -rw-r--r-- | 921 bytes |
crc32_generic.c | -rw-r--r-- | 3.7 KB |
crc32c_generic.c | -rw-r--r-- | 4.1 KB |
crct10dif_common.c | -rw-r--r-- | 3.6 KB |
crct10dif_generic.c | -rw-r--r-- | 3.1 KB |
cryptd.c | -rw-r--r-- | 28.6 KB |
crypto_engine.c | -rw-r--r-- | 15.3 KB |
crypto_null.c | -rw-r--r-- | 5.3 KB |
crypto_user_base.c | -rw-r--r-- | 12.0 KB |
crypto_user_stat.c | -rw-r--r-- | 9.6 KB |
ctr.c | -rw-r--r-- | 9.5 KB |
cts.c | -rw-r--r-- | 11.5 KB |
curve25519-generic.c | -rw-r--r-- | 2.2 KB |
deflate.c | -rw-r--r-- | 7.7 KB |
des_generic.c | -rw-r--r-- | 3.3 KB |
dh.c | -rw-r--r-- | 5.4 KB |
dh_helper.c | -rw-r--r-- | 3.4 KB |
drbg.c | -rw-r--r-- | 59.7 KB |
ecb.c | -rw-r--r-- | 2.4 KB |
ecc.c | -rw-r--r-- | 39.0 KB |
ecc.h | -rw-r--r-- | 8.0 KB |
ecc_curve_defs.h | -rw-r--r-- | 1.9 KB |
ecdh.c | -rw-r--r-- | 3.9 KB |
ecdh_helper.c | -rw-r--r-- | 2.1 KB |
echainiv.c | -rw-r--r-- | 4.1 KB |
ecrdsa.c | -rw-r--r-- | 8.3 KB |
ecrdsa_defs.h | -rw-r--r-- | 7.2 KB |
ecrdsa_params.asn1 | -rw-r--r-- | 142 bytes |
ecrdsa_pub_key.asn1 | -rw-r--r-- | 57 bytes |
essiv.c | -rw-r--r-- | 17.8 KB |
fcrypt.c | -rw-r--r-- | 18.0 KB |
fips.c | -rw-r--r-- | 1.7 KB |
gcm.c | -rw-r--r-- | 30.0 KB |
geniv.c | -rw-r--r-- | 3.8 KB |
gf128mul.c | -rw-r--r-- | 12.5 KB |
ghash-generic.c | -rw-r--r-- | 4.8 KB |
hash_info.c | -rw-r--r-- | 1.9 KB |
hmac.c | -rw-r--r-- | 6.4 KB |
internal.h | -rw-r--r-- | 3.7 KB |
jitterentropy-kcapi.c | -rw-r--r-- | 6.2 KB |
jitterentropy.c | -rw-r--r-- | 25.2 KB |
jitterentropy.h | -rw-r--r-- | 643 bytes |
keywrap.c | -rw-r--r-- | 9.5 KB |
khazad.c | -rw-r--r-- | 51.8 KB |
kpp.c | -rw-r--r-- | 2.7 KB |
lrw.c | -rw-r--r-- | 10.6 KB |
lz4.c | -rw-r--r-- | 3.3 KB |
lz4hc.c | -rw-r--r-- | 3.4 KB |
lzo-rle.c | -rw-r--r-- | 3.4 KB |
lzo.c | -rw-r--r-- | 3.3 KB |
md4.c | -rw-r--r-- | 5.9 KB |
md5.c | -rw-r--r-- | 7.4 KB |
memneq.c | -rw-r--r-- | 6.1 KB |
michael_mic.c | -rw-r--r-- | 3.5 KB |
nhpoly1305.c | -rw-r--r-- | 7.8 KB |
ofb.c | -rw-r--r-- | 2.4 KB |
pcbc.c | -rw-r--r-- | 4.6 KB |
pcrypt.c | -rw-r--r-- | 9.2 KB |
poly1305_generic.c | -rw-r--r-- | 3.7 KB |
proc.c | -rw-r--r-- | 2.5 KB |
ripemd.h | -rw-r--r-- | 1013 bytes |
rmd128.c | -rw-r--r-- | 10.0 KB |
rmd160.c | -rw-r--r-- | 12.4 KB |
rmd256.c | -rw-r--r-- | 10.3 KB |
rmd320.c | -rw-r--r-- | 12.8 KB |
rng.c | -rw-r--r-- | 4.8 KB |
rsa-pkcs1pad.c | -rw-r--r-- | 17.2 KB |
rsa.c | -rw-r--r-- | 5.3 KB |
rsa_helper.c | -rw-r--r-- | 4.0 KB |
rsaprivkey.asn1 | -rw-r--r-- | 316 bytes |
rsapubkey.asn1 | -rw-r--r-- | 82 bytes |
salsa20_generic.c | -rw-r--r-- | 6.0 KB |
scatterwalk.c | -rw-r--r-- | 2.0 KB |
scompress.c | -rw-r--r-- | 6.8 KB |
seed.c | -rw-r--r-- | 17.2 KB |
seqiv.c | -rw-r--r-- | 4.5 KB |
serpent_generic.c | -rw-r--r-- | 21.5 KB |
sha1_generic.c | -rw-r--r-- | 2.3 KB |
sha256_generic.c | -rw-r--r-- | 3.3 KB |
sha3_generic.c | -rw-r--r-- | 8.0 KB |
sha512_generic.c | -rw-r--r-- | 7.8 KB |
shash.c | -rw-r--r-- | 15.1 KB |
simd.c | -rw-r--r-- | 13.5 KB |
skcipher.c | -rw-r--r-- | 24.8 KB |
sm3_generic.c | -rw-r--r-- | 4.1 KB |
sm4_generic.c | -rw-r--r-- | 6.2 KB |
streebog_generic.c | -rw-r--r-- | 57.6 KB |
tcrypt.c | -rw-r--r-- | 78.7 KB |
tcrypt.h | -rw-r--r-- | 4.2 KB |
tea.c | -rw-r--r-- | 6.5 KB |
testmgr.c | -rw-r--r-- | 144.9 KB |
testmgr.h | -rw-r--r-- | 1.2 MB |
tgr192.c | -rw-r--r-- | 30.3 KB |
twofish_common.c | -rw-r--r-- | 37.1 KB |
twofish_generic.c | -rw-r--r-- | 5.6 KB |
vmac.c | -rw-r--r-- | 18.8 KB |
wp512.c | -rw-r--r-- | 59.8 KB |
xcbc.c | -rw-r--r-- | 6.7 KB |
xor.c | -rw-r--r-- | 3.4 KB |
xts.c | -rw-r--r-- | 11.7 KB |
xxhash_generic.c | -rw-r--r-- | 2.4 KB |
zstd.c | -rw-r--r-- | 5.0 KB |
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