Toke Høiland-Jørgensen c40dd8c473 bpf, test_run: Fix LIVE_FRAME frame update after a page has been recycled ... The test_run code detects whether a page has been modified and re-initialises the xdp_frame structure if it has, using xdp_update_frame_from_buff(). However, xdp_update_frame_from_buff() doesn't touch frame->mem, so that wasn't correctly re-initialised, which led to the pages from page_pool not being returned correctly. Syzbot noticed this as a memory leak. Fix this by also copying the frame->mem structure when re-initialising the frame, like we do on initialisation of a new page from page_pool. Fixes: e5995bc7e2 ("bpf, test_run: fix crashes due to XDP frame overwriting/corruption") Fixes: b530e9e106 ("bpf: Add "live packet" mode for XDP in BPF_PROG_RUN") Reported-by: syzbot+d121e098da06af416d23@syzkaller.appspotmail.com Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Tested-by: syzbot+d121e098da06af416d23@syzkaller.appspotmail.com Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com> Acked-by: Stanislav Fomichev <sdf@fomichev.me> Link: https://lore.kernel.org/bpf/20241030-test-run-mem-fix-v1-1-41e88e8cae43@redhat.com		2024-10-31 16:15:21 +01:00
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bpf_dummy_struct_ops.c	bpf: use type_may_be_null() helper for nullable-param check	2024-09-05 13:29:06 -07:00
Makefile	bpf: Add dummy BPF STRUCT_OPS for test purpose	2021-11-01 14:10:00 -07:00
test_run.c	bpf, test_run: Fix LIVE_FRAME frame update after a page has been recycled	2024-10-31 16:15:21 +01:00