Revision 84811412464d66fcf73661a279aa1d7985166495 authored by Prashant Malani on 20 November 2019, 19:40:21 UTC, committed by David S. Miller on 20 November 2019, 20:48:13 UTC
Both rtl_work_func_t() and rtl8152_close() call napi_disable(). Since the two calls aren't protected by a lock, if the close function starts executing before the work function, we can get into a situation where the napi_disable() function is called twice in succession (first by rtl8152_close(), then by set_carrier()). In such a situation, the second call would loop indefinitely, since rtl8152_close() doesn't call napi_enable() to clear the NAPI_STATE_SCHED bit. The rtl8152_close() function in turn issues a cancel_delayed_work_sync(), and so it would wait indefinitely for the rtl_work_func_t() to complete. Since rtl8152_close() is called by a process holding rtnl_lock() which is requested by other processes, this eventually leads to a system deadlock and crash. Re-order the napi_disable() call to occur after the work function disabling and urb cancellation calls are issued. Change-Id: I6ef0b703fc214998a037a68f722f784e1d07815e Reported-by: http://crbug.com/1017928 Signed-off-by: Prashant Malani <pmalani@chromium.org> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent b172845
File | Mode | Size |
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Kconfig | -rw-r--r-- | 4.9 KB |
Makefile | -rw-r--r-- | 216 bytes |
copy_up.c | -rw-r--r-- | 20.3 KB |
dir.c | -rw-r--r-- | 28.0 KB |
export.c | -rw-r--r-- | 21.9 KB |
file.c | -rw-r--r-- | 13.8 KB |
inode.c | -rw-r--r-- | 25.4 KB |
namei.c | -rw-r--r-- | 27.1 KB |
overlayfs.h | -rw-r--r-- | 15.0 KB |
ovl_entry.h | -rw-r--r-- | 2.7 KB |
readdir.c | -rw-r--r-- | 25.4 KB |
super.c | -rw-r--r-- | 41.8 KB |
util.c | -rw-r--r-- | 21.7 KB |
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