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04d50d953a
Clean up when virtfn setup fails to prevent NULL pointer dereference
during device removal. The kernel oops below occurred due to incorrect
error handling flow when pci_setup_device() fails.
Add pci_iov_scan_device(), which handles virtfn allocation and setup and
cleans up if pci_setup_device() fails, so pci_iov_add_virtfn() doesn't need
to call pci_stop_and_remove_bus_device(). This prevents accessing
partially initialized virtfn devices during removal.
BUG: kernel NULL pointer dereference, address: 00000000000000d0
RIP: 0010:device_del+0x3d/0x3d0
Call Trace:
pci_remove_bus_device+0x7c/0x100
pci_iov_add_virtfn+0xfa/0x200
sriov_enable+0x208/0x420
mlx5_core_sriov_configure+0x6a/0x160 [mlx5_core]
sriov_numvfs_store+0xae/0x1a0
Link: https://lore.kernel.org/r/20250310084524.599225-1-shayd@nvidia.com
Fixes:
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
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There are various text files in the Documentation/ subdirectory,
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