CVE-2025-38161

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

RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction

Upon RQ destruction if the firmware command fails which is the last resource to be destroyed some SW resources were already cleaned regardless of the failure.

Now properly rollback the object to its original state upon such failure.

In order to avoid a use-after free in case someone tries to destroy the object again, which results in the following kernel trace: refcountt: underflow; use-after-free. WARNING: CPU: 0 PID: 37589 at lib/refcount.c:28 refcountwarnsaturate+0xf4/0x148 Modules linked in: rdmaucm(OE) rdmacm(OE) iwcm(OE) ibipoib(OE) ibcm(OE) ibumad(OE) mlx5ib(OE) rfkill mlx5core(OE) mlxdevm(OE) ibuverbs(OE) ibcore(OE) psample mlxfw(OE) mlxcompat(OE) macsec tls pcihypervintf sunrpc vfat fat virtionet netfailover failover fuse loop nfnetlink vsockloopback vmwvsockvirtiotransportcommon vmwvsockvmcitransport vmwvmci vsock xfs crct10difce ghashce sha2ce sha256arm64 sha1ce virtioconsole virtiogpu virtioblk virtiodmabuf virtiommio dmmirror dmregionhash dmlog dmmod xpmem(OE) CPU: 0 UID: 0 PID: 37589 Comm: python3 Kdump: loaded Tainted: G OE ------- --- 6.12.0-54.el10.aarch64 #1 Tainted: [O]=OOTMODULE, [E]=UNSIGNEDMODULE Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : refcountwarnsaturate+0xf4/0x148 lr : refcountwarnsaturate+0xf4/0x148 sp : ffff80008b81b7e0 x29: ffff80008b81b7e0 x28: ffff000133d51600 x27: 0000000000000001 x26: 0000000000000000 x25: 00000000ffffffea x24: ffff00010ae80f00 x23: ffff00010ae80f80 x22: ffff0000c66e5d08 x21: 0000000000000000 x20: ffff0000c66e0000 x19: ffff00010ae80340 x18: 0000000000000006 x17: 0000000000000000 x16: 0000000000000020 x15: ffff80008b81b37f x14: 0000000000000000 x13: 2e656572662d7265 x12: ffff80008283ef78 x11: ffff80008257efd0 x10: ffff80008283efd0 x9 : ffff80008021ed90 x8 : 0000000000000001 x7 : 00000000000bffe8 x6 : c0000000ffff7fff x5 : ffff0001fb8e3408 x4 : 0000000000000000 x3 : ffff800179993000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000133d51600 Call trace: refcountwarnsaturate+0xf4/0x148 mlx5coreputrsc+0x88/0xa0 [mlx5ib] mlx5coredestroyrqtracked+0x64/0x98 [mlx5ib] mlx5ibdestroywq+0x34/0x80 [mlx5ib] ibdestroywquser+0x30/0xc0 [ibcore] uverbsfreewq+0x28/0x58 [ibuverbs] destroyhwidruobject+0x34/0x78 [ibuverbs] uverbsdestroyuobject+0x48/0x240 [ibuverbs] __uverbscleanupufile+0xd4/0x1a8 [ibuverbs] uverbsdestroyufilehw+0x48/0x120 [ibuverbs] ibuverbsclose+0x2c/0x100 [ibuverbs] __fput+0xd8/0x2f0 __fput_sync+0x50/0x70 _arm64sysclose+0x40/0x90 invokesyscall.constprop.0+0x74/0xd0 doel0svc+0x48/0xe8 el0svc+0x44/0x1d0 el0t64synchandler+0x120/0x130 el0t64sync+0x1a4/0x1a8