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net: netdevsim: try to close UDP port harness races

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syzbot discovered that we remove the debugfs files after we free
the netdev. Try to clean up the relevant dir while the device
is still around.

Reported-by: syzbot+2e5de9e3ab986b71d2bf@syzkaller.appspotmail.com
Fixes: 424be63ad8 ("netdevsim: add UDP tunnel port offload support")
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Link: https://patch.msgid.link/20250122224503.762705-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski
2025-01-22 14:45:03 -08:00
parent 5de7665e0a
commit 50bf398e1c
3 changed files with 23 additions and 17 deletions
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1
drivers/net/netdevsim/netdevsim.h
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@@ -134,6 +134,7 @@ struct netdevsim {
u32 sleep;
u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
struct dentry *ddir;
struct debugfs_u32_array dfs_ports[2];
} udp_ports;