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ep93xx: clock: Fix UAF in ep93xx_clk_register_gate()

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commit 3b68b08885 upstream.

arch/arm/mach-ep93xx/clock.c:154:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
arch/arm/mach-ep93xx/clock.c:151:2: note: Taking true branch
if (IS_ERR(clk))
^
arch/arm/mach-ep93xx/clock.c:152:3: note: Memory is released
kfree(psc);
^~~~~~~~~~
arch/arm/mach-ep93xx/clock.c:154:2: note: Use of memory after it is freed
return &psc->hw;
^ ~~~~~~~~

Fixes: 9645ccc7bd ("ep93xx: clock: convert in-place to COMMON_CLK")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org/thread/B5YCO2NJEXINCYE26Y255LCVMO55BGWW/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Sverdlin 2022-01-30 16:25:02 +01:00 committed by Greg Kroah-Hartman
parent c5628533a3
commit 0f12166872
1 changed files with 3 additions and 1 deletions
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4
arch/arm/mach-ep93xx/clock.c
View file

@ -148,8 +148,10 @@ static struct clk_hw *ep93xx_clk_register_gate(const char *name,
psc->lock = &clk_lock;
clk = clk_register(NULL, &psc->hw);
if (IS_ERR(clk))
if (IS_ERR(clk)) {
kfree(psc);
return ERR_CAST(clk);
}
return &psc->hw;
}