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* [PATCH AUTOSEL 4.4 01/15] ima: always return negative code for error
@ 2019-10-01 16:45 Sasha Levin
  2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 02/15] fs: nfs: Fix possible null-pointer dereferences in encode_attrs() Sasha Levin
                   ` (13 more replies)
  0 siblings, 14 replies; 15+ messages in thread
From: Sasha Levin @ 2019-10-01 16:45 UTC (permalink / raw)
  To: linux-kernel, stable
  Cc: Sascha Hauer, Mimi Zohar, Sasha Levin, linux-integrity,
	linux-security-module

From: Sascha Hauer <s.hauer@pengutronix.de>

[ Upstream commit f5e1040196dbfe14c77ce3dfe3b7b08d2d961e88 ]

integrity_kernel_read() returns the number of bytes read. If this is
a short read then this positive value is returned from
ima_calc_file_hash_atfm(). Currently this is only indirectly called from
ima_calc_file_hash() and this function only tests for the return value
being zero or nonzero and also doesn't forward the return value.
Nevertheless there's no point in returning a positive value as an error,
so translate a short read into -EINVAL.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 security/integrity/ima/ima_crypto.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index a29209fa56746..5c87baaefafb6 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -298,8 +298,11 @@ static int ima_calc_file_hash_atfm(struct file *file,
 		rbuf_len = min_t(loff_t, i_size - offset, rbuf_size[active]);
 		rc = integrity_kernel_read(file, offset, rbuf[active],
 					   rbuf_len);
-		if (rc != rbuf_len)
+		if (rc != rbuf_len) {
+			if (rc >= 0)
+				rc = -EINVAL;
 			goto out3;
+		}
 
 		if (rbuf[1] && offset) {
 			/* Using two buffers, and it is not the first
-- 
2.20.1


^ permalink raw reply related	[flat|nested] 15+ messages in thread
end of thread, other threads:[~2019-10-01 16:47 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-01 16:45 [PATCH AUTOSEL 4.4 01/15] ima: always return negative code for error Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 02/15] fs: nfs: Fix possible null-pointer dereferences in encode_attrs() Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 03/15] 9p: avoid attaching writeback_fid on mmap with type PRIVATE Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 04/15] xen/pci: reserve MCFG areas earlier Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 05/15] ceph: fix directories inode i_blkbits initialization Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 06/15] drm/amdgpu: Check for valid number of registers to read Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 07/15] cdc_ncm: fix divide-by-zero caused by invalid wMaxPacketSize Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 08/15] usbnet: ignore endpoints with " Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 09/15] net/phy: fix DP83865 10 Mbps HDX loopback disable function Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 10/15] thermal: Fix use-after-free when unregistering thermal zone device Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 11/15] fuse: fix memleak in cuse_channel_open Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 12/15] arcnet: provide a buffer big enough to actually receive packets Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 13/15] kernel/elfcore.c: include proper prototypes Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 14/15] usbnet: sanity checking of packet sizes and device mtu Sasha Levin
2019-10-01 16:45 ` [PATCH AUTOSEL 4.4 15/15] sch_netem: fix a divide by zero in tabledist() Sasha Levin

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