CVE-2022-49907
net: mdio: fix undefined behavior in bit shift for __mdiobus_register
In the Linux kernel, the following vulnerability has been resolved:
net: mdio: fix undefined behavior in bit shift for __mdiobus_register
Shifting signed 32-bit value by 31 bits is undefined, so changing
significant bit to unsigned. The UBSAN warning calltrace like below:
UBSAN: shift-out-of-bounds in drivers/net/phy/mdio_bus.c:586:27
left shift of 1 by 31 places cannot be represented in type 'int'
Call Trace:
<TASK>
dump_stack_lvl+0x7d/0xa5
dump_stack+0x15/0x1b
ubsan_epilogue+0xe/0x4e
__ubsan_handle_shift_out_of_bounds+0x1e7/0x20c
__mdiobus_register+0x49d/0x4e0
fixed_mdio_bus_init+0xd8/0x12d
do_one_initcall+0x76/0x430
kernel_init_freeable+0x3b3/0x422
kernel_init+0x24/0x1e0
ret_from_fork+0x1f/0x30
</TASK>
Affected products
Linux · LinuxWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://git.kernel.org/stable/c/20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7https://git.kernel.org/stable/c/40e4eb324c59e11fcb927aa46742d28aba6ecb8ahttps://git.kernel.org/stable/c/4954b5359eb141499492fadfab891e28905509e2https://git.kernel.org/stable/c/634f066d02bdb22a26da7deb0c7617ab1a65fc9dhttps://git.kernel.org/stable/c/6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0https://git.kernel.org/stable/c/7006176a3c863e3e353ce1b8a349ef5bb1b9320ehttps://git.kernel.org/stable/c/985a88bf0b27193522bba7856b1763f428cef19dhttps://git.kernel.org/stable/c/a3fafc974be37319679f36dc4e7cca7db1e02973