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| author | Jesper Dangaard Brouer <[email protected]> | 2025-06-11 12:40:04 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2025-06-12 15:08:32 +0000 |
| commit | 9337c54401a5bb6ac3c9f6c71dd2a9130cfba82e (patch) | |
| tree | e8e037d9be70415c3c1111c1d7bcbadd5a23127e /drivers/fpga/tests/fpga-mgr-test.c | |
| parent | Merge branch 'net_sched-no-longer-use-qdisc_tree_flush_backlog' (diff) | |
| download | kernel-9337c54401a5bb6ac3c9f6c71dd2a9130cfba82e.tar.gz kernel-9337c54401a5bb6ac3c9f6c71dd2a9130cfba82e.zip | |
veth: prevent NULL pointer dereference in veth_xdp_rcv
The veth peer device is RCU protected, but when the peer device gets
deleted (veth_dellink) then the pointer is assigned NULL (via
RCU_INIT_POINTER).
This patch adds a necessary NULL check in veth_xdp_rcv when accessing
the veth peer net_device.
This fixes a bug introduced in commit dc82a33297fc ("veth: apply qdisc
backpressure on full ptr_ring to reduce TX drops"). The bug is a race
and only triggers when having inflight packets on a veth that is being
deleted.
Reported-by: Ihor Solodrai <[email protected]>
Closes: https://lore.kernel.org/all/[email protected]/
Reported-by: [email protected]
Closes: https://lore.kernel.org/all/[email protected]/
Fixes: dc82a33297fc ("veth: apply qdisc backpressure on full ptr_ring to reduce TX drops")
Signed-off-by: Jesper Dangaard Brouer <[email protected]>
Acked-by: Ihor Solodrai <[email protected]>
Link: https://patch.msgid.link/174964557873.519608.10855046105237280978.stgit@firesoul
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'drivers/fpga/tests/fpga-mgr-test.c')
0 files changed, 0 insertions, 0 deletions