Description
In the Linux kernel, the following vulnerability has been resolved: media: bttv: fix use after free error due to btv->timeout timer There may be some a race condition between timer function bttv_irq_timeout and bttv_remove. The timer is setup in probe and there is no timer_delete operation in remove function. When it hit kfree btv, the function might still be invoked, which will cause use after free bug. This bug is found by static analysis, it may be false positive. Fix it by adding del_timer_sync invoking to the remove function. cpu0 cpu1 bttv_probe ->timer_setup ->bttv_set_dma ->mod_timer; bttv_remove ->kfree(btv); ->bttv_irq_timeout ->USE btv
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
162e6376ac58440beb6a2d2ee294f5d88ea58dd1 to < bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9affected162e6376ac58440beb6a2d2ee294f5d88ea58dd1 to < b35fdade92c5058a5e727e233fe263b828de2c9aaffected162e6376ac58440beb6a2d2ee294f5d88ea58dd1 to < 2f3d9198cdae1cb079ec8652f4defacd481eab2baffected162e6376ac58440beb6a2d2ee294f5d88ea58dd1 to < 51c94256a83fe4e17406c66ff3e1ad7d242d8574affected162e6376ac58440beb6a2d2ee294f5d88ea58dd1 to < 20568d06f6069cb835e05eed432edf962645d226affected162e6376ac58440beb6a2d2ee294f5d88ea58dd1 to < 1871014d6ef4812ad11ef7d838d73ce09d632267affected162e6376ac58440beb6a2d2ee294f5d88ea58dd1 to < 847599fffa528b2cdec4e21b6bf7586dad982132affected162e6376ac58440beb6a2d2ee294f5d88ea58dd1 to < bd5b50b329e850d467e7bcc07b2b6bde3752fbdaaffected
Linux Linux
Default version status: affected
4.15affected0 to < 4.15unaffected4.19.299 to ≤ 4.19.*unaffected5.4.261 to ≤ 5.4.*unaffected5.10.201 to ≤ 5.10.*unaffected5.15.139 to ≤ 5.15.*unaffected6.1.63 to ≤ 6.1.*unaffected6.5.12 to ≤ 6.5.*unaffected6.6.2 to ≤ 6.6.*unaffected6.7 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9 ↗
- https://git.kernel.org/stable/c/b35fdade92c5058a5e727e233fe263b828de2c9a ↗
- https://git.kernel.org/stable/c/2f3d9198cdae1cb079ec8652f4defacd481eab2b ↗
- https://git.kernel.org/stable/c/51c94256a83fe4e17406c66ff3e1ad7d242d8574 ↗
- https://git.kernel.org/stable/c/20568d06f6069cb835e05eed432edf962645d226 ↗
- https://git.kernel.org/stable/c/1871014d6ef4812ad11ef7d838d73ce09d632267 ↗
- https://git.kernel.org/stable/c/847599fffa528b2cdec4e21b6bf7586dad982132 ↗
- https://git.kernel.org/stable/c/bd5b50b329e850d467e7bcc07b2b6bde3752fbda ↗