In the Linux kernel, the following vulnerability has been resolved:

batman-adv: tp_meter: directly shut down timer on cleanup

batadv_tp_sender_cleanup() was calling timer_delete_sync() followed by
timer_delete() to guard against the timer handler re-arming itself between
the two calls. This double-deletion hack relied on the sending status being
set to 0 to suppress re-arming.

Replace both calls with a single timer_shutdown_sync(). This function both
waits for any running timer callback to complete (like timer_delete_sync())
and permanently disarms the timer so it cannot be re-armed afterwards,
making re-arming prevention unconditional and self-documenting.

The re-arming property is also required because otherwise:

1. context 0 (batadv_tp_recv_ack()) checks in
   batadv_tp_reset_sender_timer() if sending is still 1 -> it is
2. context 1 changes in batadv_tp_sender_shutdown() sending to 0 and in
   this process forces the kthread to stop timer in
   batadv_tp_sender_cleanup()
3. context 0 continues in batadv_tp_reset_sender_timer() and rearms the
   timer -> but the reference for it is already gone

https://git.kernel.org/stable/c/00bf4bb9947b1190a8be8d9b6a1bcbfa3707785c

https://git.kernel.org/stable/c/5bc2d50fb66b46f86543d5153a188eb1486d0b6e

https://git.kernel.org/stable/c/74a76634055462833446684fd526d73c290ea43a

https://git.kernel.org/stable/c/770bf0a35f0620b526fd4193889d1e77084e4c43

https://git.kernel.org/stable/c/933880a8bc9b4042223a79255c0b1021cdc36991

https://git.kernel.org/stable/c/d5487249a81ea658717614009c8f46acc5b7101a

https://git.kernel.org/stable/c/f86b20ec8d17d77bddc02c5c86cfa2389d84ecff

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/batman-adv/tp_meter.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"00bf4bb9947b1190a8be8d9b6a1bcbfa3707785c","versionType":"git","status":"affected"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"74a76634055462833446684fd526d73c290ea43a","versionType":"git","status":"affected"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"5bc2d50fb66b46f86543d5153a188eb1486d0b6e","versionType":"git","status":"affected"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"f86b20ec8d17d77bddc02c5c86cfa2389d84ecff","versionType":"git","status":"affected"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"770bf0a35f0620b526fd4193889d1e77084e4c43","versionType":"git","status":"affected"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"933880a8bc9b4042223a79255c0b1021cdc36991","versionType":"git","status":"affected"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"d5487249a81ea658717614009c8f46acc5b7101a","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/batman-adv/tp_meter.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"4.8","status":"affected"},{"version":"0","lessThan":"4.8","versionType":"semver","status":"unaffected"},{"version":"5.15.210","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.176","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.143","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.93","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.34","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.0.11","lessThanOrEqual":"7.0.*","versionType":"semver","status":"unaffected"},{"version":"7.1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]