kernel_samsung_sm7125

jenna

History

Ricardo Neri 9115c7589b efi: Check for NULL efi kernel parameters Even though it is documented how to specifiy efi parameters, it is possible to cause a kernel panic due to a dereference of a NULL pointer when parsing such parameters if "efi" alone is given: PANIC: early exception 0e rip 10:ffffffff812fb361 error 0 cr2 0 [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.2.0-rc1+ #450 [ 0.000000] ffffffff81fe20a9 ffffffff81e03d50 ffffffff8184bb0f 00000000000003f8 [ 0.000000] 0000000000000000 ffffffff81e03e08 ffffffff81f371a1 64656c62616e6520 [ 0.000000] 0000000000000069 000000000000005f 0000000000000000 0000000000000000 [ 0.000000] Call Trace: [ 0.000000] [<ffffffff8184bb0f>] dump_stack+0x45/0x57 [ 0.000000] [<ffffffff81f371a1>] early_idt_handler_common+0x81/0xae [ 0.000000] [<ffffffff812fb361>] ? parse_option_str+0x11/0x90 [ 0.000000] [<ffffffff81f4dd69>] arch_parse_efi_cmdline+0x15/0x42 [ 0.000000] [<ffffffff81f376e1>] do_early_param+0x50/0x8a [ 0.000000] [<ffffffff8106b1b3>] parse_args+0x1e3/0x400 [ 0.000000] [<ffffffff81f37a43>] parse_early_options+0x24/0x28 [ 0.000000] [<ffffffff81f37691>] ? loglevel+0x31/0x31 [ 0.000000] [<ffffffff81f37a78>] parse_early_param+0x31/0x3d [ 0.000000] [<ffffffff81f3ae98>] setup_arch+0x2de/0xc08 [ 0.000000] [<ffffffff8109629a>] ? vprintk_default+0x1a/0x20 [ 0.000000] [<ffffffff81f37b20>] start_kernel+0x90/0x423 [ 0.000000] [<ffffffff81f37495>] x86_64_start_reservations+0x2a/0x2c [ 0.000000] [<ffffffff81f37582>] x86_64_start_kernel+0xeb/0xef [ 0.000000] RIP 0xffffffff81ba2efc This panic is not reproducible with "efi=" as this will result in a non-NULL zero-length string. Thus, verify that the pointer to the parameter string is not NULL. This is consistent with other parameter-parsing functions which check for NULL pointers. Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com>		10 years ago
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broadcom	MIPS: BCM47xx: Move NVRAM driver to the drivers/firmware/	10 years ago
efi	efi: Check for NULL efi kernel parameters	10 years ago
google	…
Kconfig	MIPS: BCM47xx: Move NVRAM driver to the drivers/firmware/	10 years ago
Makefile	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	10 years ago
dcdbas.c	…
dcdbas.h	…
dell_rbu.c	…
dmi-id.c	…
dmi-sysfs.c	firmware: dmi_scan: add SBMIOS entry and DMI tables	10 years ago
dmi_scan.c	firmware: dmi_scan: Coding style cleanups	10 years ago
edd.c	…
iscsi_ibft.c	iscsi_ibft: filter null v4-mapped v6 addresses	10 years ago
iscsi_ibft_find.c	…
memmap.c	drivers/firmware/memmap.c: fix kernel-doc format	10 years ago
pcdp.c	serial: 8250_early: Remove setup_early_serial8250_console()	10 years ago
pcdp.h	…
qcom_scm-32.c	firmware: qcom: scm: Add HDCP Support	10 years ago
qcom_scm.c	firmware: qcom: scm: Add HDCP Support	10 years ago
qcom_scm.h	firmware: qcom: scm: Add HDCP Support	10 years ago