On Wed, Sep 19, 2018 at 01:54:56PM -0600, Sean Tranchetti wrote: > XFRM mode parameters passed as part of the user templates > in the IP_XFRM_POLICY are never properly validated. Passing > values other than valid XFRM modes can cause stack-out-of-bounds > reads to occur later in the XFRM processing: > > [ 140.535608] > ================================================================ > [ 140.543058] BUG: KASAN: stack-out-of-bounds in > xfrm_state_find+0x17e4/0x1cc4 > [ 140.550306] Read of size 4 at addr ffffffc0238a7a58 by task repro/5148 > [ 140.557369] > [ 140.558927] Call trace: > [ 140.558936] dump_backtrace+0x0/0x388 > [ 140.558940] show_stack+0x24/0x30 > [ 140.558946] __dump_stack+0x24/0x2c > [ 140.558949] dump_stack+0x8c/0xd0 > [ 140.558956] print_address_description+0x74/0x234 > [ 140.558960] kasan_report+0x240/0x264 > [ 140.558963] __asan_report_load4_noabort+0x2c/0x38 > [ 140.558967] xfrm_state_find+0x17e4/0x1cc4 > [ 140.558971] xfrm_resolve_and_create_bundle+0x40c/0x1fb8 > [ 140.558975] xfrm_lookup+0x238/0x1444 > [ 140.558977] xfrm_lookup_route+0x48/0x11c > [ 140.558984] ip_route_output_flow+0x88/0xc4 > [ 140.558991] raw_sendmsg+0xa74/0x266c > [ 140.558996] inet_sendmsg+0x258/0x3b0 > [ 140.559002] sock_sendmsg+0xbc/0xec > [ 140.559005] SyS_sendto+0x3a8/0x5a8 > [ 140.559008] el0_svc_naked+0x34/0x38 > [ 140.559009] > [ 140.592245] page dumped because: kasan: bad access detected > [ 140.597981] page_owner info is not active (free page?) > [ 140.603267] > [ 140.653503] > ================================================================ > > Signed-off-by: Sean Tranchetti <stran...@codeaurora.org>
Applied to the ipsec tree, thanks a lot!
