On Tue, Sep 18, 2018 at 11:28:33AM +0200, Marek Szyprowski wrote: > Hi > > On 2018-09-17 05:24, [email protected] wrote: > > From: He Zhe <[email protected]> > > > > early_cma does not check input argument before passing it to > > simple_strtoull. The argument would be a NULL pointer if "cma", without > > its value, is set in command line and thus causes the following panic. > > > > PANIC: early exception 0xe3 IP 10:ffffffffa3e9db8d error 0 cr2 0x0 > > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted > > 4.19.0-rc3-yocto-standard+ #7 > > [ 0.000000] RIP: 0010:_parse_integer_fixup_radix+0xd/0x70 > > ... > > [ 0.000000] Call Trace: > > [ 0.000000] simple_strtoull+0x29/0x70 > > [ 0.000000] memparse+0x26/0x90 > > [ 0.000000] early_cma+0x17/0x6a > > [ 0.000000] do_early_param+0x57/0x8e > > [ 0.000000] parse_args+0x208/0x320 > > [ 0.000000] ? rdinit_setup+0x30/0x30 > > [ 0.000000] parse_early_options+0x29/0x2d > > [ 0.000000] ? rdinit_setup+0x30/0x30 > > [ 0.000000] parse_early_param+0x36/0x4d > > [ 0.000000] setup_arch+0x336/0x99e > > [ 0.000000] start_kernel+0x6f/0x4e6 > > [ 0.000000] x86_64_start_reservations+0x24/0x26 > > [ 0.000000] x86_64_start_kernel+0x6f/0x72 > > [ 0.000000] secondary_startup_64+0xa4/0xb0 > > > > This patch adds a check to prevent the panic. > > > > Signed-off-by: He Zhe <[email protected]> > > Cc: [email protected] > > Cc: [email protected] > > Cc: [email protected] > > Cc: [email protected] > > Thanks for the fix. > > Reviewed-by: Marek Szyprowski <[email protected]>
Thanks, added to the dma-mapping tree. _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
