Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: scsi: ibmvfc: Remove BUG_ON in the case of an empty event pool In practice the driver should never send more commands than are allocated to a queue's event pool. In the unlikely event that this happens, the code asserts a BUG_ON, and in the case that the kernel is not configured to crash on panic returns a junk event pointer from the empty event list causing things to spiral from there. This BUG_ON is a historical artifact of the ibmvfc driver first being upstreamed, and it is well known now that the use of BUG_ON is bad practice except in the most unrecoverable scenario. There is nothing about this scenario that prevents the driver from recovering and carrying on. Remove the BUG_ON in question from ibmvfc_get_event() and return a NULL pointer in the case of an empty event pool. Update all call sites to ibmvfc_get_event() to check for a NULL pointer and perfrom the appropriate failure or recovery action.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 before e1d1f79b1929dce470a5dc9281c574cd58e8c6c0; affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 before 88984ec4792766df5a9de7a2ff2b5f281f94c7d4; affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 before d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8; affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 before 8bbe784c2ff28d56ca0c548aaf3e584edc77052d; affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 before b39f2d10b86d0af353ea339e5815820026bca48f |
| Linux / Linux | affected 2.6.27; unaffected 0 before 2.6.27; unaffected 5.15.140 through 5.15.*; unaffected 6.1.64 through 6.1.*; unaffected 6.5.13 through 6.5.*; unaffected 6.6.3 through 6.6.*; unaffected 6.7 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e1d1f79b1929dce470a5dc9281c574cd58e8c6c0
- https://git.kernel.org/stable/c/88984ec4792766df5a9de7a2ff2b5f281f94c7d4
- https://git.kernel.org/stable/c/d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8
- https://git.kernel.org/stable/c/8bbe784c2ff28d56ca0c548aaf3e584edc77052d
- https://git.kernel.org/stable/c/b39f2d10b86d0af353ea339e5815820026bca48f
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/e1d1f79b1929dce470a5dc9281c574cd58e8c6c0
- https://git.kernel.org/stable/c/88984ec4792766df5a9de7a2ff2b5f281f94c7d4
- https://git.kernel.org/stable/c/d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8
- https://git.kernel.org/stable/c/8bbe784c2ff28d56ca0c548aaf3e584edc77052d
- https://git.kernel.org/stable/c/b39f2d10b86d0af353ea339e5815820026bca48f