Messages in this thread | | | Date | Wed, 30 Mar 2011 12:54:11 +0300 | Subject | Re: kmemleak for MIPS | From | Daniel Baluta <> |
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>> unreferenced object 0x8f90d000 (size 4096): >> comm "swapper", pid 1, jiffies 4294937330 (age 815.000s) >> hex dump (first 32 bytes): >> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ >> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ >> backtrace: >> [<80529644>] alloc_large_system_hash+0x2f8/0x410 >> [<805383b4>] udp_table_init+0x4c/0x158 >> [<805384dc>] udp_init+0x1c/0x94 >> [<8053889c>] inet_init+0x184/0x2a0 >> [<80100584>] do_one_initcall+0x174/0x1e0 >> [<8051f348>] kernel_init+0xe4/0x174 >> [<80103d4c>] kernel_thread_helper+0x10/0x18 > > If you for the kmemleak scan (via echo) a few times, do you get more > leaks? The udp_table_init() function looks like it could leak some > memory but I haven't seen it before. I'm not sure whether this is a > false positive or a real leak.
Looking again at udp_init_table it seem that a memory leak is possible. Could you post your .config and the full output of dmesg after booting.
A situation where CONFIG_BASE_SMALL is 0, and table->mask < UDP_HTABLE_SIZE_MIN - 1 would lead to a memory leak.
Furthermore, you can add some printks inside udp_init_table and check what is really happening there. ([1])
thanks, Daniel.
[1] http://lxr.linux.no/linux+v2.6.38/net/ipv4/udp.c#L2125
thanks, Daniel. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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