5.5

CVE-2023-52730

mmc: sdio: fix possible resource leaks in some error paths

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

mmc: sdio: fix possible resource leaks in some error paths

If sdio_add_func() or sdio_init_func() fails, sdio_remove_func() can
not release the resources, because the sdio function is not presented
in these two cases, it won't call of_node_put() or put_device().

To fix these leaks, make sdio_func_present() only control whether
device_del() needs to be called or not, then always call of_node_put()
and put_device().

In error case in sdio_init_func(), the reference of 'card->dev' is
not get, to avoid redundant put in sdio_free_func_cis(), move the
get_device() to sdio_alloc_func() and put_device() to sdio_release_func(),
it can keep the get/put function be balanced.

Without this patch, while doing fault inject test, it can get the
following leak reports, after this fix, the leak is gone.

unreferenced object 0xffff888112514000 (size 2048):
  comm "kworker/3:2", pid 65, jiffies 4294741614 (age 124.774s)
  hex dump (first 32 bytes):
    00 e0 6f 12 81 88 ff ff 60 58 8d 06 81 88 ff ff  ..o.....`X......
    10 40 51 12 81 88 ff ff 10 40 51 12 81 88 ff ff  .@Q......@Q.....
  backtrace:
    [<000000009e5931da>] kmalloc_trace+0x21/0x110
    [<000000002f839ccb>] mmc_alloc_card+0x38/0xb0 [mmc_core]
    [<0000000004adcbf6>] mmc_sdio_init_card+0xde/0x170 [mmc_core]
    [<000000007538fea0>] mmc_attach_sdio+0xcb/0x1b0 [mmc_core]
    [<00000000d4fdeba7>] mmc_rescan+0x54a/0x640 [mmc_core]

unreferenced object 0xffff888112511000 (size 2048):
  comm "kworker/3:2", pid 65, jiffies 4294741623 (age 124.766s)
  hex dump (first 32 bytes):
    00 40 51 12 81 88 ff ff e0 58 8d 06 81 88 ff ff  .@Q......X......
    10 10 51 12 81 88 ff ff 10 10 51 12 81 88 ff ff  ..Q.......Q.....
  backtrace:
    [<000000009e5931da>] kmalloc_trace+0x21/0x110
    [<00000000fcbe706c>] sdio_alloc_func+0x35/0x100 [mmc_core]
    [<00000000c68f4b50>] mmc_attach_sdio.cold.18+0xb1/0x395 [mmc_core]
    [<00000000d4fdeba7>] mmc_rescan+0x54a/0x640 [mmc_core]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
LinuxLinux Kernel Version >= 2.6.33 < 4.14.306
LinuxLinux Kernel Version >= 4.15 < 4.19.273
LinuxLinux Kernel Version >= 4.20 < 5.4.232
LinuxLinux Kernel Version >= 5.5 < 5.10.169
LinuxLinux Kernel Version >= 5.11 < 5.15.95
LinuxLinux Kernel Version >= 5.16 < 6.1.13
LinuxLinux Kernel Version6.2 Updaterc1
LinuxLinux Kernel Version6.2 Updaterc2
LinuxLinux Kernel Version6.2 Updaterc3
LinuxLinux Kernel Version6.2 Updaterc4
LinuxLinux Kernel Version6.2 Updaterc5
LinuxLinux Kernel Version6.2 Updaterc6
LinuxLinux Kernel Version6.2 Updaterc7
LinuxLinux Kernel Version6.2 Updaterc8
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.25% 0.163
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://git.kernel.org/stable/c/1e06cf04239e202248c8fa356bf11449dc73cfbd
Patch
https://git.kernel.org/stable/c/30716d9f0fa1766e522cf24c8a456244e4fc9931
Patch
https://git.kernel.org/stable/c/5c7858adada31dbed042448cff6997dd6efc472a
Patch
https://git.kernel.org/stable/c/605d9fb9556f8f5fb4566f4df1480f280f308ded
Patch
https://git.kernel.org/stable/c/761db46b29b496946046d8cb33c7ea6de6bef36e
Patch
https://git.kernel.org/stable/c/92ff03c2563c9b57a027c744750f3b7d2f261c58
Patch
https://git.kernel.org/stable/c/f855d31bb38d663c3ba672345d7cce9324ba3b72
Patch