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authorTetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>2021-10-19 20:54:31 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-11-26 11:58:38 +0100
commitb646237528094b5b32e415b17897515bab7532a8 (patch)
tree588dac34d66971eecc50c0c2ad69baccca7e3314
parentc80c2a7af51c93d76ea5d8308c5be3ffd721f644 (diff)
smackfs: use __GFP_NOFAIL for smk_cipso_doi()
[ Upstream commit f91488ee15bd3cac467e2d6a361fc2d34d1052ae ] syzbot is reporting kernel panic at smk_cipso_doi() due to memory allocation fault injection [1]. The reason for need to use panic() was not explained. But since no fix was proposed for 18 months, for now let's use __GFP_NOFAIL for utilizing syzbot resource on other bugs. Link: https://syzkaller.appspot.com/bug?extid=89731ccb6fec15ce1c22 [1] Reported-by: syzbot <syzbot+89731ccb6fec15ce1c22@syzkaller.appspotmail.com> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--security/smack/smackfs.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 845ed464fb8c..40c8b2b8a472 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -721,9 +721,7 @@ static void smk_cipso_doi(void)
printk(KERN_WARNING "%s:%d remove rc = %d\n",
__func__, __LINE__, rc);
- doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
- if (doip == NULL)
- panic("smack: Failed to initialize cipso DOI.\n");
+ doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL | __GFP_NOFAIL);
doip->map.std = NULL;
doip->doi = smk_cipso_doi_value;
doip->type = CIPSO_V4_MAP_PASS;