net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs()

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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 4d92b95ff2 ("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: 4d92b95ff2 ("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>

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Tetsuo Handa 2026-08-15 15:50:13 +09:00 • committed by Jakub Kicinski

parent 4e30317ff6

commit 0b1c2af8a2

1 changed files with 1 additions and 0 deletions

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net/core/dev.c

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