Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: goldfish: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.
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
84d7b768748943db2bb658b43931fdab04c224cc to < 589d4fe56713c6344cd9f8939f9c7621c85f0966affected84d7b768748943db2bb658b43931fdab04c224cc to < bad8b61eb5059acd88349680e47839342dc89e94affected84d7b768748943db2bb658b43931fdab04c224cc to < 33751e28842bf5aee5ef7b2b8d5e456a069095cbaffected84d7b768748943db2bb658b43931fdab04c224cc to < 77ea437faa4c06362e3ecfd2d7264eaa7ac1e82caffected84d7b768748943db2bb658b43931fdab04c224cc to < 4350505e82b4f972ddb788e1c712c557c38859d0affected84d7b768748943db2bb658b43931fdab04c224cc to < 8c89aade8335e26a6a7dcda18992d15f51943927affected84d7b768748943db2bb658b43931fdab04c224cc to < 0b29ffe4090a3fc7a7649de20e1eb1e53adddac7affected84d7b768748943db2bb658b43931fdab04c224cc to < b2ce982e2e0c888dc55c888ad0e20ea04daf2e6baffected
Linux Linux
Default version status: affected
3.9affected0 to < 3.9unaffected5.10.252 to ≤ 5.10.*unaffected5.15.202 to ≤ 5.15.*unaffected6.1.165 to ≤ 6.1.*unaffected6.6.128 to ≤ 6.6.*unaffected6.12.75 to ≤ 6.12.*unaffected6.18.14 to ≤ 6.18.*unaffected6.19.4 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/589d4fe56713c6344cd9f8939f9c7621c85f0966 ↗
- https://git.kernel.org/stable/c/bad8b61eb5059acd88349680e47839342dc89e94 ↗
- https://git.kernel.org/stable/c/33751e28842bf5aee5ef7b2b8d5e456a069095cb ↗
- https://git.kernel.org/stable/c/77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c ↗
- https://git.kernel.org/stable/c/4350505e82b4f972ddb788e1c712c557c38859d0 ↗
- https://git.kernel.org/stable/c/8c89aade8335e26a6a7dcda18992d15f51943927 ↗
- https://git.kernel.org/stable/c/0b29ffe4090a3fc7a7649de20e1eb1e53adddac7 ↗
- https://git.kernel.org/stable/c/b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b ↗