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| author | Jia-Ju Bai <baijiaju1990@163.com> | 2017-10-03 10:25:22 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-10-07 12:04:32 +0800 |
| commit | 9c6caa349a0e05500a378295874d16fc280bbb78 (patch) | |
| tree | 25b07a18b8741d24349b904aeda2896e8946494e /crypto/crypto_user.c | |
| parent | 01a1423ce9e05cc57b7ff131d1a49d9a140df28b (diff) | |
| download | linux-crypto-9c6caa349a0e05500a378295874d16fc280bbb78.tar.gz linux-crypto-9c6caa349a0e05500a378295874d16fc280bbb78.zip | |
crypto: shash - Fix a sleep-in-atomic bug in shash_setkey_unaligned
The SCTP program may sleep under a spinlock, and the function call path is:
sctp_generate_t3_rtx_event (acquire the spinlock)
sctp_do_sm
sctp_side_effects
sctp_cmd_interpreter
sctp_make_init_ack
sctp_pack_cookie
crypto_shash_setkey
shash_setkey_unaligned
kmalloc(GFP_KERNEL)
For the same reason, the orinoco driver may sleep in interrupt handler,
and the function call path is:
orinoco_rx_isr_tasklet
orinoco_rx
orinoco_mic
crypto_shash_setkey
shash_setkey_unaligned
kmalloc(GFP_KERNEL)
To fix it, GFP_KERNEL is replaced with GFP_ATOMIC.
This bug is found by my static analysis tool and my code review.
Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/crypto_user.c')
0 files changed, 0 insertions, 0 deletions