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e8e56ffd9d
Locking ppp_mutex must be done before dereferencing file->private_data,
otherwise it could be modified before ppp_unattached_ioctl() takes the
lock. This could lead ppp_unattached_ioctl() to override ->private_data,
thus leaking reference to the ppp_file previously pointed to.
v2: lock all ppp_ioctl() instead of just checking private_data in
ppp_unattached_ioctl(), to avoid ambiguous behaviour.
Fixes:
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.. | ||
bsd_comp.c | ||
Kconfig | ||
Makefile | ||
ppp_async.c | ||
ppp_deflate.c | ||
ppp_generic.c | ||
ppp_mppe.c | ||
ppp_mppe.h | ||
ppp_synctty.c | ||
pppoe.c | ||
pppox.c | ||
pptp.c |