Vulnerability CVE-2024-38555

Vulnerability CVE-2024-38555

Published: 2024-06-19

Description:

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Discard command completions in internal error

Fix use after free when FW completion arrives while device is in
internal error state. Avoid calling completion handler in this case,
since the device will flush the command interface and trigger all
completions manually.

Kernel log:
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
...
RIP: 0010:refcount_warn_saturate+0xd8/0xe0
...
Call Trace:
<IRQ>
? __warn+0x79/0x120
? refcount_warn_saturate+0xd8/0xe0
? report_bug+0x17c/0x190
? handle_bug+0x3c/0x60
? exc_invalid_op+0x14/0x70
? asm_exc_invalid_op+0x16/0x20
? refcount_warn_saturate+0xd8/0xe0
cmd_ent_put+0x13b/0x160 [mlx5_core]
mlx5_cmd_comp_handler+0x5f9/0x670 [mlx5_core]
cmd_comp_notifier+0x1f/0x30 [mlx5_core]
notifier_call_chain+0x35/0xb0
atomic_notifier_call_chain+0x16/0x20
mlx5_eq_async_int+0xf6/0x290 [mlx5_core]
notifier_call_chain+0x35/0xb0
atomic_notifier_call_chain+0x16/0x20
irq_int_handler+0x19/0x30 [mlx5_core]
__handle_irq_event_percpu+0x4b/0x160
handle_irq_event+0x2e/0x80
handle_edge_irq+0x98/0x230
__common_interrupt+0x3b/0xa0
common_interrupt+0x7b/0xa0
</IRQ>
<TASK>
asm_common_interrupt+0x22/0x40

References:

https://git.kernel.org/stable/c/f6fbb8535e990f844371086ab2c1221f71f993d3

https://git.kernel.org/stable/c/3cb92b0ad73d3f1734e812054e698d655e9581b0

https://git.kernel.org/stable/c/bf8aaf0ae01c27ae3c06aa8610caf91e50393396

https://git.kernel.org/stable/c/1337ec94bc5a9eed250e33f5f5c89a28a6bfabdb

https://git.kernel.org/stable/c/1d5dce5e92a70274de67a59e1e674c3267f94cd7

https://git.kernel.org/stable/c/7ac4c69c34240c6de820492c0a28a0bd1494265a

https://git.kernel.org/stable/c/db9b31aa9bc56ff0d15b78f7e827d61c4a096e40

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