linuxmsm/laptops-kernel
0
0
Fork 0
mirror of https://github.com/linux-msm/laptops-kernel.git synced 2026-08-13 14:19:53 -07:00
Code Issues Packages Projects Releases Wiki Activity

time/namespace: Validate nanosecond field in proc_timens_set_offset()

Browse Source 
The function validates tv_sec to be within [-KTIME_SEC_MAX, KTIME_SEC_MAX]
but never validates that tv_nsec is within the valid range of
[0, NSEC_PER_SEC-1] before using it in timespec64_add().

timespec64_add() expects both timespec64 structures to have normalized
values with tv_nsec in the range [0, 999999999]. If off->val.tv_nsec
contains invalid values (negative or >= NSEC_PER_SEC), it could lead to
incorrect calculations or unexpected behavior.

Add validation to ensure tv_nsec is within the valid range before
performing the addition.

Fixes: 04a8682a71 ("fs/proc: Introduce /proc/pid/timens_offsets")
Signed-off-by: Malaya Kumar Rout <malayarout91@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260704093429.89350-1-malayarout91@gmail.com
This commit is contained in:
Malaya Kumar Rout
2026-07-07 23:26:58 +02:00
committed by Thomas Gleixner
parent eddfded419
commit 06aba58e58
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/time/namespace.c
+4 -2
View File
@@ -293,10 +293,12 @@ int proc_timens_set_offset(struct file *file, struct task_struct *p,
return -EINVAL;
}
if (off->val.tv_sec > KTIME_SEC_MAX ||
off->val.tv_sec < -KTIME_SEC_MAX)
if (off->val.tv_sec > KTIME_SEC_MAX || off->val.tv_sec < -KTIME_SEC_MAX)
return -ERANGE;
if (off->val.tv_nsec < 0 || off->val.tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
tp = timespec64_add(tp, off->val);
/*
* KTIME_SEC_MAX is divided by 2 to be sure that KTIME_MAX is