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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2017-10-19 15:51:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-05 13:20:46 +0300 |
| commit | 8586e18413441d265f0ff536378d6ef358d18853 (patch) | |
| tree | bf90d4a64de2636e8f67dbda69c080a65b239290 /mm | |
| parent | 142afbc6b2f33832f332ce5b561aa817edfff0b4 (diff) | |
| download | linux-8586e18413441d265f0ff536378d6ef358d18853.tar.xz | |
ipsec: Fix aborted xfrm policy dump crash
commit 1137b5e2529a8f5ca8ee709288ecba3e68044df2 upstream.
An independent security researcher, Mohamed Ghannam, has reported
this vulnerability to Beyond Security's SecuriTeam Secure Disclosure
program.
The xfrm_dump_policy_done function expects xfrm_dump_policy to
have been called at least once or it will crash. This can be
triggered if a dump fails because the target socket's receive
buffer is full.
This patch fixes it by using the cb->start mechanism to ensure that
the initialisation is always done regardless of the buffer situation.
Fixes: 12a169e7d8f4 ("ipsec: Put dumpers on the dump list")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions