diff options
| author | Amery Hung <ameryhung@gmail.com> | 2025-09-23 02:33:49 +0300 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2025-09-23 23:35:11 +0300 |
| commit | 8f12d1137c2382c80aada8e05d7cc650cd4e403c (patch) | |
| tree | 9bae7159d88f623ed41cbfdebf964911e01d03c9 /net/core | |
| parent | 54728bd535fb3899ad51489dc1e05eb5bb53cb95 (diff) | |
| download | linux-8f12d1137c2382c80aada8e05d7cc650cd4e403c.tar.xz | |
bpf: Clear pfmemalloc flag when freeing all fragments
It is possible for bpf_xdp_adjust_tail() to free all fragments. The
kfunc currently clears the XDP_FLAGS_HAS_FRAGS bit, but not
XDP_FLAGS_FRAGS_PF_MEMALLOC. So far, this has not caused a issue when
building sk_buff from xdp_buff since all readers of xdp_buff->flags
use the flag only when there are fragments. Clear the
XDP_FLAGS_FRAGS_PF_MEMALLOC bit as well to make the flags correct.
Signed-off-by: Amery Hung <ameryhung@gmail.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://patch.msgid.link/20250922233356.3356453-2-ameryhung@gmail.com
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/filter.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 63f3baee2daf..5837534f4352 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4210,6 +4210,7 @@ static int bpf_xdp_frags_shrink_tail(struct xdp_buff *xdp, int offset) if (unlikely(!sinfo->nr_frags)) { xdp_buff_clear_frags_flag(xdp); + xdp_buff_clear_frag_pfmemalloc(xdp); xdp->data_end -= offset; } |