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Krzysztof Czurylo 9cfb946f51 RDMA/irdma: Fix data race in irdma_free_pble [ Upstream commit `81f44409fb` ] Protects pble_rsrc counters with mutex to prevent data race. Fixes the following data race in irdma_free_pble reported by KCSAN: BUG: KCSAN: data-race in irdma_free_pble [irdma] / irdma_free_pble [irdma] write to 0xffff91430baa0078 of 8 bytes by task 16956 on cpu 5: irdma_free_pble+0x3b/0xb0 [irdma] irdma_dereg_mr+0x108/0x110 [irdma] ib_dereg_mr_user+0x74/0x160 [ib_core] uverbs_free_mr+0x26/0x30 [ib_uverbs] destroy_hw_idr_uobject+0x4a/0x90 [ib_uverbs] uverbs_destroy_uobject+0x7b/0x330 [ib_uverbs] uobj_destroy+0x61/0xb0 [ib_uverbs] ib_uverbs_run_method+0x1f2/0x380 [ib_uverbs] ib_uverbs_cmd_verbs+0x365/0x440 [ib_uverbs] ib_uverbs_ioctl+0x111/0x190 [ib_uverbs] __x64_sys_ioctl+0xc9/0x100 do_syscall_64+0x44/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 read to 0xffff91430baa0078 of 8 bytes by task 16953 on cpu 2: irdma_free_pble+0x23/0xb0 [irdma] irdma_dereg_mr+0x108/0x110 [irdma] ib_dereg_mr_user+0x74/0x160 [ib_core] uverbs_free_mr+0x26/0x30 [ib_uverbs] destroy_hw_idr_uobject+0x4a/0x90 [ib_uverbs] uverbs_destroy_uobject+0x7b/0x330 [ib_uverbs] uobj_destroy+0x61/0xb0 [ib_uverbs] ib_uverbs_run_method+0x1f2/0x380 [ib_uverbs] ib_uverbs_cmd_verbs+0x365/0x440 [ib_uverbs] ib_uverbs_ioctl+0x111/0x190 [ib_uverbs] __x64_sys_ioctl+0xc9/0x100 do_syscall_64+0x44/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 value changed: 0x0000000000005a62 -> 0x0000000000005a68 Fixes: `e8c4dbc2fc` ("RDMA/irdma: Add PBLE resource manager") Signed-off-by: Krzysztof Czurylo <krzysztof.czurylo@intel.com> Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com> Link: https://patch.msgid.link/20251125025350.180-3-tatyana.e.nikolova@intel.com Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2026-01-19 13:09:33 +01:00
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README

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
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.