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8c7b21f374
[ Upstream commit 81f44409fb4f027d1e6d54edbeba5156ad94b214 ]
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>
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.