Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
watch_queue: Actually free the watch
free_watch() does everything barring actually freeing the watch object. Fix this by adding the missing kfree.
kmemleak produces a report something like the following. Note that as an address can be seen in the first word, the watch would appear to have gone through call_rcu().
BUG: memory leak
unreferenced object 0xffff88810ce4a200 (size 96):
comm “syz-executor352”, pid 3605, jiffies 4294947473 (age 13.720s)
hex dump (first 32 bytes):
e0 82 48 0d 81 88 ff ff 00 00 00 00 00 00 00 00 ..H………….
80 a2 e4 0c 81 88 ff ff 00 00 00 00 00 00 00 00 …………….
backtrace:
[
Details
- Affected product:
- AlmaLinux 9.2 ESU
- Affected packages:
- kernel @ 5.14.0
In the Linux kernel, the following vulnerability has been resolved:
watch_queue: Actually free the watch
free_watch() does everything barring actually freeing the watch object. Fix this by adding the missing kfree.
kmemleak produces a report something like the following. Note that as an address can be seen in the first word, the watch would appear to have gone through call_rcu().
BUG: memory leak
unreferenced object 0xffff88810ce4a200 (size 96):
comm “syz-executor352”, pid 3605, jiffies 4294947473 (age 13.720s)
hex dump (first 32 bytes):
e0 82 48 0d 81 88 ff ff 00 00 00 00 00 00 00 00 ..H………….
80 a2 e4 0c 81 88 ff ff 00 00 00 00 00 00 00 00 …………….
backtrace:
[