Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: comedi: ni_atmio16d: Fix invalid clean-up after failed attach If the driver's COMEDI "attach" handler function (`atmio16d_attach()`) returns an error, the COMEDI core will call the driver's "detach" handler function (`atmio16d_detach()`) to clean up. This calls `reset_atmio16d()` unconditionally, but depending on where the error occurred in the attach handler, the device may not have been sufficiently initialized to call `reset_atmio16d()`. It uses `dev->iobase` as the I/O port base address and `dev->private` as the pointer to the COMEDI device's private data structure. `dev->iobase` may still be set to its initial value of 0, which would result in undesired writes to low I/O port addresses. `dev->private` may still be `NULL`, which would result in null pointer dereferences. Fix `atmio16d_detach()` by checking that `dev->private` is valid (non-null) before calling `reset_atmio16d()`. This implies that `dev->iobase` was set correctly since that is set up before `dev->private`.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2323b276308a5da5774b778f39c7fd94b2a3022a before a01dd339ea6ac58b0967a50085622a6017351140; affected 2323b276308a5da5774b778f39c7fd94b2a3022a before 933a2d6a95f9bfb203e562c9be1dd990c735535c; affected 2323b276308a5da5774b778f39c7fd94b2a3022a before 5d8d88c8c0eec230de8f1f60e0920a4337939a88; affected 2323b276308a5da5774b778f39c7fd94b2a3022a before f517646e008fe99ca1800601cd011b110f8684ae; affected 2323b276308a5da5774b778f39c7fd94b2a3022a before 3848ae00b1642e2c98ff8cbfd2d3b38c6f53b5c3; affected 2323b276308a5da5774b778f39c7fd94b2a3022a before 43c68a2c7cc35b7c2a83c285cb4ad3d472b8caa2; affected 2323b276308a5da5774b778f39c7fd94b2a3022a before d07d97ca4f7fac467cdcf4a012690853958b7e89; affected 2323b276308a5da5774b778f39c7fd94b2a3022a before 101ab946b79ad83b36d5cfd47de587492a80acf0 |
| Linux / Linux | affected 2.6.30; unaffected 0 before 2.6.30; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.168 through 6.1.*; unaffected 6.6.134 through 6.6.*; unaffected 6.12.81 through 6.12.*; unaffected 6.18.22 through 6.18.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a01dd339ea6ac58b0967a50085622a6017351140
- https://git.kernel.org/stable/c/933a2d6a95f9bfb203e562c9be1dd990c735535c
- https://git.kernel.org/stable/c/5d8d88c8c0eec230de8f1f60e0920a4337939a88
- https://git.kernel.org/stable/c/f517646e008fe99ca1800601cd011b110f8684ae
- https://git.kernel.org/stable/c/3848ae00b1642e2c98ff8cbfd2d3b38c6f53b5c3
- https://git.kernel.org/stable/c/43c68a2c7cc35b7c2a83c285cb4ad3d472b8caa2
- https://git.kernel.org/stable/c/d07d97ca4f7fac467cdcf4a012690853958b7e89
- https://git.kernel.org/stable/c/101ab946b79ad83b36d5cfd47de587492a80acf0