Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: scsi: qedf: Add pointer checks in qedf_update_link_speed() The following trace was observed: [ 14.042059] Call Trace: [ 14.042061] <IRQ> [ 14.042068] qedf_link_update+0x144/0x1f0 [qedf] [ 14.042117] qed_link_update+0x5c/0x80 [qed] [ 14.042135] qed_mcp_handle_link_change+0x2d2/0x410 [qed] [ 14.042155] ? qed_set_ptt+0x70/0x80 [qed] [ 14.042170] ? qed_set_ptt+0x70/0x80 [qed] [ 14.042186] ? qed_rd+0x13/0x40 [qed] [ 14.042205] qed_mcp_handle_events+0x437/0x690 [qed] [ 14.042221] ? qed_set_ptt+0x70/0x80 [qed] [ 14.042239] qed_int_sp_dpc+0x3a6/0x3e0 [qed] [ 14.042245] tasklet_action_common.isra.14+0x5a/0x100 [ 14.042250] __do_softirq+0xe4/0x2f8 [ 14.042253] irq_exit+0xf7/0x100 [ 14.042255] do_IRQ+0x7f/0xd0 [ 14.042257] common_interrupt+0xf/0xf [ 14.042259] </IRQ> API qedf_link_update() is getting called from QED but by that time shost_data is not initialised. This results in a NULL pointer dereference when we try to dereference shost_data while updating supported_speeds. Add a NULL pointer check before dereferencing shost_data.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 61d8658b4a435eac729966cc94cdda077a8df5cd before a6362a737572f66051deb7637f3f77ddf7a4402f; affected 61d8658b4a435eac729966cc94cdda077a8df5cd before 11014efcec378bb0050a6cf08eaf375e3693400a; affected 61d8658b4a435eac729966cc94cdda077a8df5cd before 73578af92a0fae6609b955fcc9113e50e413c80f |
| Linux / Linux | affected 4.11; unaffected 0 before 4.11; unaffected 5.10.40 through 5.10.*; unaffected 5.12.7 through 5.12.*; unaffected 5.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a6362a737572f66051deb7637f3f77ddf7a4402f
- https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a
- https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.