| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37802: ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING" |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING" |
| |
| wait_event_timeout() will set the state of the current |
| task to TASK_UNINTERRUPTIBLE, before doing the condition check. This |
| means that ksmbd_durable_scavenger_alive() will try to acquire the mutex |
| while already in a sleeping state. The scheduler warns us by giving |
| the following warning: |
| |
| do not call blocking ops when !TASK_RUNNING; state=2 set at |
| [<0000000061515a6f>] prepare_to_wait_event+0x9f/0x6c0 |
| WARNING: CPU: 2 PID: 4147 at kernel/sched/core.c:10099 __might_sleep+0x12f/0x160 |
| |
| mutex lock is not needed in ksmbd_durable_scavenger_alive(). |
| |
| The Linux kernel CVE team has assigned CVE-2025-37802 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12.26 with commit 8f805b3746d2f41702c77cba22f94f8415fadd1a |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.14.5 with commit cd161198e091e8a62b9bd631be970ea9a87d2d6a |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.15 with commit 1df0d4c616138784e033ad337961b6e1a6bcd999 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-37802 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| fs/smb/server/vfs_cache.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/8f805b3746d2f41702c77cba22f94f8415fadd1a |
| https://git.kernel.org/stable/c/cd161198e091e8a62b9bd631be970ea9a87d2d6a |
| https://git.kernel.org/stable/c/1df0d4c616138784e033ad337961b6e1a6bcd999 |
