diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2026-08-15 15:50:13 +0900 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-08-18 10:02:33 -0700 |
| commit | 0b1c2af8a22c35cb099c735c2f63ea3ba757557d (patch) | |
| tree | eb695ebff837e7b8390054c6e33b0715da583b6d | |
| parent | 4e30317ff67a2eb12b4d890d39f72fd7e7117d48 (diff) | |
net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs()
sashiko is reporting that trying to read /sys/kernel/debug/ref_tracker/*
causes use-afer-free crash when either alloc_percpu() or dev_addr_init()
in alloc_netdev_mqs() failed, for commit 4d92b95ff2f9 ("net: add net device
refcount tracker infrastructure") added ref_tracker_dir_exit() to only
free_netdev() path.
Closes: https://sashiko.dev/#/patchset/56c707e7-1fb0-43ec-b8fb-cf6f451e513e%40I-love.SAKURA.ne.jp
Fixes: 4d92b95ff2f9 ("net: add net device refcount tracker infrastructure")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/b06ce35d-e7bc-47a5-8e0a-e82be7e4dd08@I-love.SAKURA.ne.jp
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/core/dev.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 5ac31370df93..39807b68ff26 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -12167,6 +12167,7 @@ free_pcpu: free_percpu(dev->pcpu_refcnt); free_dev: #endif + ref_tracker_dir_exit(&dev->refcnt_tracker); kvfree(dev); return NULL; } |