CVE-2022-48647 (GCVE-0-2022-48647)
Vulnerability from cvelistv5
Published
2024-04-28 13:00
Modified
2025-05-04 12:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sfc: fix TX channel offset when using legacy interrupts In legacy interrupt mode the tx_channel_offset was hardcoded to 1, but that's not correct if efx_sepparate_tx_channels is false. In that case, the offset is 0 because the tx queues are in the single existing channel at index 0, together with the rx queue. Without this fix, as soon as you try to send any traffic, it tries to get the tx queues from an uninitialized channel getting these errors: WARNING: CPU: 1 PID: 0 at drivers/net/ethernet/sfc/tx.c:540 efx_hard_start_xmit+0x12e/0x170 [sfc] [...] RIP: 0010:efx_hard_start_xmit+0x12e/0x170 [sfc] [...] Call Trace: <IRQ> dev_hard_start_xmit+0xd7/0x230 sch_direct_xmit+0x9f/0x360 __dev_queue_xmit+0x890/0xa40 [...] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc] [...] Call Trace: <IRQ> dev_hard_start_xmit+0xd7/0x230 sch_direct_xmit+0x9f/0x360 __dev_queue_xmit+0x890/0xa40 [...]
References
Impacted products
Vendor Product Version
Linux Linux Version: bf2af9b24313553f3f0b30443220ab0ac8595d2d
Version: 06cb7e134f8f4a11b66f1dbeb5f237412a0aeedc
Version: c308dfd1b43ef0d4c3e57b741bb3462eb7a7f4a2
Version: c308dfd1b43ef0d4c3e57b741bb3462eb7a7f4a2
Version: 1a7c0b3ef93d1d1dae7b0a85dab3ac6e3ad0ef61
Version: b2d60329a0b88c4e35017436ee29c43be59d46a5
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