Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: twl4030_charger: cancel workers via devm bci is devm-allocated. Two workers (bci->work and bci->current_worker) dereference it. twl4030_bci_remove() disables charging and masks interrupts. It cancels neither worker. A worker pending at remove() can run after devm frees bci. The USB transceiver comes from devm_usb_get_phy_by_node(). devm unregisters its notifier only after remove() returns. A cancel_work_sync() in remove() can then race a notifier reschedule. devm_work_autocancel() and devm_delayed_work_autocancel() avoid that. They cancel the workers during devm release, before bci is freed. The current_worker is registered first, since devm will cancel in reverse order and bci->work can reschedule current_worker. [Move comment about order into the commit message]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d6ccc442b12102414c1343f0adacaa8a1aaa516c to < 9644c96ef8646c65d46caa5139a6631e29b79d6caffectedd6ccc442b12102414c1343f0adacaa8a1aaa516c to < e9fffe10bd791082263c1678f2f6cdd6d7b487e0affectedd6ccc442b12102414c1343f0adacaa8a1aaa516c to < c46c205bab0dfce4dd54aeb49da3f183e1fdfc63affectedd6ccc442b12102414c1343f0adacaa8a1aaa516c to < 72a2d6cd049f892853e4e2d8d8fc5e7d0244a458affectedd6ccc442b12102414c1343f0adacaa8a1aaa516c to < a4460e89d4088cfec2da5be33e265ef1a8e780e9affectedd6ccc442b12102414c1343f0adacaa8a1aaa516c to < b955da82db4170bdf1c784dc457287aa0c977378affectedd6ccc442b12102414c1343f0adacaa8a1aaa516c to < 6eba34732524067da2aad5ddfdfbc641ded10e9eaffected
Linux Linux
Default version status: affected
2.6.39affected0 to < 2.6.39unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/9644c96ef8646c65d46caa5139a6631e29b79d6c ↗
- https://git.kernel.org/stable/c/e9fffe10bd791082263c1678f2f6cdd6d7b487e0 ↗
- https://git.kernel.org/stable/c/c46c205bab0dfce4dd54aeb49da3f183e1fdfc63 ↗
- https://git.kernel.org/stable/c/72a2d6cd049f892853e4e2d8d8fc5e7d0244a458 ↗
- https://git.kernel.org/stable/c/a4460e89d4088cfec2da5be33e265ef1a8e780e9 ↗
- https://git.kernel.org/stable/c/b955da82db4170bdf1c784dc457287aa0c977378 ↗
- https://git.kernel.org/stable/c/6eba34732524067da2aad5ddfdfbc641ded10e9e ↗