Hi,
I built kernel for Samsung Galaxy Ace 2 from Samsung's source code with
kmemleak enabled. There were a few errors, so I fixed them as it can be
seen here: https://github.com/hckk/GT-I8160_Kernel
There are 10 entries in kmemleak output. For example:
unreferenced object 0xce2a2000 (size 8192):
comm "vold", pid 1855, jiffies 4294942835 (age 1394.240s)
hex dump (first 32 bytes):
00 00 00 00 24 7e 50 c0 d0 7d 50 c0 7c 7d 50 c0 ....$~P..}P.|}P.
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<c03f4a00>] create_object+0x10c/0x24c
[<c08e99f0>] kmemleak_alloc+0x6c/0xd0
[<c03f1a54>] __kmalloc+0x178/0x27c
[<c0507988>] __crypto_alloc_tfm+0x4c/0x140
[<c05086b8>] crypto_spawn_tfm+0x78/0xcc
[<c0511dc0>] crypto_cbc_init_tfm+0x2c/0x44
[<c05079dc>] __crypto_alloc_tfm+0xa0/0x140
[<c05086b8>] crypto_spawn_tfm+0x78/0xcc
[<c050b968>] skcipher_geniv_init+0x2c/0x54
[<c050cd68>] eseqiv_init+0x50/0x54
[<c05079dc>] __crypto_alloc_tfm+0xa0/0x140
[<c050aee0>] crypto_alloc_ablkcipher+0x68/0xa8
[<c06b82b0>] crypt_ctr+0x294/0x8a0
[<c06b08c8>] dm_table_add_target+0xf8/0x260
[<c06b3ffc>] table_load+0x114/0x2c4
[<c06b37d4>] dm_ctl_ioctl+0x1d0/0x2cc
So, I should find dm_ctl_ioctl function in source code and check if any
memory allocated there is released in this function or any other from call
trace, am I right?
I noticed that in almost all leaks, there is dm_table_add_target function
in call trace.
The second problem is that I can't get telephony to work on any kernel that
I build.
It seems like modules drivers/char/hwreg/hwreg.ko and
drivers/char/hw_random/rng-core.ko aren't loaded during boot. I can insmod
them without any error but telephony is still disabled.
What may be wrong with it?
Greetings, Michal.
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