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(parent: 9c5bef5) | patch
dlm: check the maximum size of a request from user
authorSasha Levin <levinsasha928@gmail.com>
Sun, 9 Sep 2012 14:16:58 +0000 (16:16 +0200)
committerDavid Teigland <teigland@redhat.com>
Mon, 10 Sep 2012 14:50:27 +0000 (09:50 -0500)
commit2b75bc9121e54e22537207b47b71373bcb0be41c
tree1b2778a163dedd71cd968b3b4e1d2049b5a86319tree | snapshot
parent9c5bef5849c9fde1a37ac005299f759440cbaf4ccommit | diff
dlm: check the maximum size of a request from user

device_write only checks whether the request size is big enough, but it doesn't
check if the size is too big.

At that point, it also tries to allocate as much memory as the user has requested
even if it's too much. This can lead to OOM killer kicking in, or memory corruption
if (count + 1) overflows.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: David Teigland <teigland@redhat.com>
fs/dlm/user.c diff | blob | history
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