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net/handshake: Fix memory leak in __sock_create() and sock_alloc_file()
When making CONFIG_DEBUG_KMEMLEAK=y and CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN=y,
modprobe handshake-test and then rmmmod handshake-test, the below memory
leak is detected.
The struct socket_alloc which is allocated by alloc_inode_sb() in
__sock_create() is not freed. And the struct dentry which is allocated
by __d_alloc() in sock_alloc_file() is not freed.
Since fput() will call file->f_op->release() which is sock_close() here and
it will call __sock_release(). and fput() will call dput(dentry) to free
the struct dentry. So replace sock_release() with fput() to fix the
below memory leak. After applying this patch, the following memory leak is
never detected.
unreferenced object 0xffff888109165840 (size 768):
comm "kunit_try_catch", pid 1852, jiffies 4294685807 (age 976.262s)
hex dump (first 32 bytes):
01 00 00 00 01 00 5a 5a 20 00 00 00 00 00 00 00 ......ZZ .......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8397993f>] sock_alloc_inode+0x1f/0x1b0
[<ffffffff81a2cb5b>] alloc_inode+0x5b/0x1a0
[<ffffffff81a32bed>] new_inode_pseudo+0xd/0x70
[<ffffffff8397889c>] sock_alloc+0x3c/0x260
[<ffffffff83979b46>] __sock_create+0x66/0x3d0
[<ffffffffa0209ba2>] 0xffffffffa0209ba2
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810f472008 (size 192):
comm "kunit_try_catch", pid 1852, jiffies 4294685808 (age 976.261s)
hex dump (first 32 bytes):
00 00 50 40 02 00 00 00 00 00 00 00 00 00 00 00 ..P@............
00 00 00 00 00 00 00 00 08 20 47 0f 81 88 ff ff ......... G.....
backtrace:
[<ffffffff81a1ff11>] __d_alloc+0x31/0x8a0
[<ffffffff81a2910e>] d_alloc_pseudo+0xe/0x50
[<ffffffff819d549e>] alloc_file_pseudo+0xce/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa0209bbb>] 0xffffffffa0209bbb
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810958e580 (size 224):
comm "kunit_try_catch", pid 1852, jiffies 4294685808 (age 976.261s)
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 03 00 2e 08 01 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff819d4b90>] alloc_empty_file+0x50/0x160
[<ffffffff819d4cf9>] alloc_file+0x59/0x730
[<ffffffff819d5524>] alloc_file_pseudo+0x154/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa0209bbb>] 0xffffffffa0209bbb
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810926dc88 (size 192):
comm "kunit_try_catch", pid 1854, jiffies 4294685809 (age 976.271s)
hex dump (first 32 bytes):
00 00 50 40 02 00 00 00 00 00 00 00 00 00 00 00 ..P@............
00 00 00 00 00 00 00 00 88 dc 26 09 81 88 ff ff ..........&.....
backtrace:
[<ffffffff81a1ff11>] __d_alloc+0x31/0x8a0
[<ffffffff81a2910e>] d_alloc_pseudo+0xe/0x50
[<ffffffff819d549e>] alloc_file_pseudo+0xce/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa0208fdc>] 0xffffffffa0208fdc
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810a241380 (size 224):
comm "kunit_try_catch", pid 1854, jiffies 4294685809 (age 976.271s)
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 03 00 2e 08 01 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff819d4b90>] alloc_empty_file+0x50/0x160
[<ffffffff819d4cf9>] alloc_file+0x59/0x730
[<ffffffff819d5524>] alloc_file_pseudo+0x154/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa0208fdc>] 0xffffffffa0208fdc
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff888109165040 (size 768):
comm "kunit_try_catch", pid 1856, jiffies 4294685811 (age 976.269s)
hex dump (first 32 bytes):
01 00 00 00 01 00 5a 5a 20 00 00 00 00 00 00 00 ......ZZ .......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8397993f>] sock_alloc_inode+0x1f/0x1b0
[<ffffffff81a2cb5b>] alloc_inode+0x5b/0x1a0
[<ffffffff81a32bed>] new_inode_pseudo+0xd/0x70
[<ffffffff8397889c>] sock_alloc+0x3c/0x260
[<ffffffff83979b46>] __sock_create+0x66/0x3d0
[<ffffffffa0208860>] 0xffffffffa0208860
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810926d568 (size 192):
comm "kunit_try_catch", pid 1856, jiffies 4294685811 (age 976.269s)
hex dump (first 32 bytes):
00 00 50 40 02 00 00 00 00 00 00 00 00 00 00 00 ..P@............
00 00 00 00 00 00 00 00 68 d5 26 09 81 88 ff ff ........h.&.....
backtrace:
[<ffffffff81a1ff11>] __d_alloc+0x31/0x8a0
[<ffffffff81a2910e>] d_alloc_pseudo+0xe/0x50
[<ffffffff819d549e>] alloc_file_pseudo+0xce/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa0208879>] 0xffffffffa0208879
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810a240580 (size 224):
comm "kunit_try_catch", pid 1856, jiffies 4294685811 (age 976.347s)
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 03 00 2e 08 01 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff819d4b90>] alloc_empty_file+0x50/0x160
[<ffffffff819d4cf9>] alloc_file+0x59/0x730
[<ffffffff819d5524>] alloc_file_pseudo+0x154/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa0208879>] 0xffffffffa0208879
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff888109164c40 (size 768):
comm "kunit_try_catch", pid 1858, jiffies 4294685816 (age 976.342s)
hex dump (first 32 bytes):
01 00 00 00 01 00 5a 5a 20 00 00 00 00 00 00 00 ......ZZ .......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8397993f>] sock_alloc_inode+0x1f/0x1b0
[<ffffffff81a2cb5b>] alloc_inode+0x5b/0x1a0
[<ffffffff81a32bed>] new_inode_pseudo+0xd/0x70
[<ffffffff8397889c>] sock_alloc+0x3c/0x260
[<ffffffff83979b46>] __sock_create+0x66/0x3d0
[<ffffffffa0208541>] 0xffffffffa0208541
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810926cd18 (size 192):
comm "kunit_try_catch", pid 1858, jiffies 4294685816 (age 976.342s)
hex dump (first 32 bytes):
00 00 50 40 02 00 00 00 00 00 00 00 00 00 00 00 ..P@............
00 00 00 00 00 00 00 00 18 cd 26 09 81 88 ff ff ..........&.....
backtrace:
[<ffffffff81a1ff11>] __d_alloc+0x31/0x8a0
[<ffffffff81a2910e>] d_alloc_pseudo+0xe/0x50
[<ffffffff819d549e>] alloc_file_pseudo+0xce/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa020855a>] 0xffffffffa020855a
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810a240200 (size 224):
comm "kunit_try_catch", pid 1858, jiffies 4294685816 (age 976.342s)
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 03 00 2e 08 01 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff819d4b90>] alloc_empty_file+0x50/0x160
[<ffffffff819d4cf9>] alloc_file+0x59/0x730
[<ffffffff819d5524>] alloc_file_pseudo+0x154/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa020855a>] 0xffffffffa020855a
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff888109164840 (size 768):
comm "kunit_try_catch", pid 1860, jiffies 4294685817 (age 976.416s)
hex dump (first 32 bytes):
01 00 00 00 01 00 5a 5a 20 00 00 00 00 00 00 00 ......ZZ .......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8397993f>] sock_alloc_inode+0x1f/0x1b0
[<ffffffff81a2cb5b>] alloc_inode+0x5b/0x1a0
[<ffffffff81a32bed>] new_inode_pseudo+0xd/0x70
[<ffffffff8397889c>] sock_alloc+0x3c/0x260
[<ffffffff83979b46>] __sock_create+0x66/0x3d0
[<ffffffffa02093e2>] 0xffffffffa02093e2
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810926cab8 (size 192):
comm "kunit_try_catch", pid 1860, jiffies 4294685817 (age 976.416s)
hex dump (first 32 bytes):
00 00 50 40 02 00 00 00 00 00 00 00 00 00 00 00 ..P@............
00 00 00 00 00 00 00 00 b8 ca 26 09 81 88 ff ff ..........&.....
backtrace:
[<ffffffff81a1ff11>] __d_alloc+0x31/0x8a0
[<ffffffff81a2910e>] d_alloc_pseudo+0xe/0x50
[<ffffffff819d549e>] alloc_file_pseudo+0xce/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa02093fb>] 0xffffffffa02093fb
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810a240040 (size 224):
comm "kunit_try_catch", pid 1860, jiffies 4294685817 (age 976.416s)
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 03 00 2e 08 01 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff819d4b90>] alloc_empty_file+0x50/0x160
[<ffffffff819d4cf9>] alloc_file+0x59/0x730
[<ffffffff819d5524>] alloc_file_pseudo+0x154/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa02093fb>] 0xffffffffa02093fb
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff888109166440 (size 768):
comm "kunit_try_catch", pid 1862, jiffies 4294685819 (age 976.489s)
hex dump (first 32 bytes):
01 00 00 00 01 00 5a 5a 20 00 00 00 00 00 00 00 ......ZZ .......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8397993f>] sock_alloc_inode+0x1f/0x1b0
[<ffffffff81a2cb5b>] alloc_inode+0x5b/0x1a0
[<ffffffff81a32bed>] new_inode_pseudo+0xd/0x70
[<ffffffff8397889c>] sock_alloc+0x3c/0x260
[<ffffffff83979b46>] __sock_create+0x66/0x3d0
[<ffffffffa02097c1>] 0xffffffffa02097c1
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810926c398 (size 192):
comm "kunit_try_catch", pid 1862, jiffies 4294685819 (age 976.489s)
hex dump (first 32 bytes):
00 00 50 40 02 00 00 00 00 00 00 00 00 00 00 00 ..P@............
00 00 00 00 00 00 00 00 98 c3 26 09 81 88 ff ff ..........&.....
backtrace:
[<ffffffff81a1ff11>] __d_alloc+0x31/0x8a0
[<ffffffff81a2910e>] d_alloc_pseudo+0xe/0x50
[<ffffffff819d549e>] alloc_file_pseudo+0xce/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa02097da>] 0xffffffffa02097da
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff888107e0b8c0 (size 224):
comm "kunit_try_catch", pid 1862, jiffies 4294685819 (age 976.489s)
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 03 00 2e 08 01 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff819d4b90>] alloc_empty_file+0x50/0x160
[<ffffffff819d4cf9>] alloc_file+0x59/0x730
[<ffffffff819d5524>] alloc_file_pseudo+0x154/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa02097da>] 0xffffffffa02097da
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff888109164440 (size 768):
comm "kunit_try_catch", pid 1864, jiffies 4294685821 (age 976.487s)
hex dump (first 32 bytes):
01 00 00 00 01 00 5a 5a 20 00 00 00 00 00 00 00 ......ZZ .......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8397993f>] sock_alloc_inode+0x1f/0x1b0
[<ffffffff81a2cb5b>] alloc_inode+0x5b/0x1a0
[<ffffffff81a32bed>] new_inode_pseudo+0xd/0x70
[<ffffffff8397889c>] sock_alloc+0x3c/0x260
[<ffffffff83979b46>] __sock_create+0x66/0x3d0
[<ffffffffa020824e>] 0xffffffffa020824e
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff88810f4cf698 (size 192):
comm "kunit_try_catch", pid 1864, jiffies 4294685821 (age 976.501s)
hex dump (first 32 bytes):
00 00 50 40 02 00 00 00 00 00 00 00 00 00 00 00 ..P@............
00 00 00 00 00 00 00 00 98 f6 4c 0f 81 88 ff ff ..........L.....
backtrace:
[<ffffffff81a1ff11>] __d_alloc+0x31/0x8a0
[<ffffffff81a2910e>] d_alloc_pseudo+0xe/0x50
[<ffffffff819d549e>] alloc_file_pseudo+0xce/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa0208267>] 0xffffffffa0208267
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
unreferenced object 0xffff888107e0b000 (size 224):
comm "kunit_try_catch", pid 1864, jiffies 4294685821 (age 976.501s)
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 03 00 2e 08 01 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff819d4b90>] alloc_empty_file+0x50/0x160
[<ffffffff819d4cf9>] alloc_file+0x59/0x730
[<ffffffff819d5524>] alloc_file_pseudo+0x154/0x210
[<ffffffff83978582>] sock_alloc_file+0x42/0x1b0
[<ffffffffa0208267>] 0xffffffffa0208267
[<ffffffff829cf03a>] kunit_generic_run_threadfn_adapter+0x4a/0x90
[<ffffffff81236fc6>] kthread+0x2b6/0x380
[<ffffffff81096afd>] ret_from_fork+0x2d/0x70
[<ffffffff81003511>] ret_from_fork_asm+0x11/0x20
Fixes: 88232ec1ec ("net/handshake: Add Kunit tests for the handshake consumer API")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jinjie Ruan
David S. Miller
parent
22b6e7f3d6
commit
4a0f07d71b
@ -235,7 +235,7 @@ static void handshake_req_submit_test4(struct kunit *test)
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KUNIT_EXPECT_PTR_EQ(test, req, result);
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handshake_req_cancel(sock->sk);
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sock_release(sock);
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fput(filp);
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}
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static void handshake_req_submit_test5(struct kunit *test)
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@ -272,7 +272,7 @@ static void handshake_req_submit_test5(struct kunit *test)
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/* Assert */
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KUNIT_EXPECT_EQ(test, err, -EAGAIN);
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sock_release(sock);
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fput(filp);
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hn->hn_pending = saved;
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}
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@ -306,7 +306,7 @@ static void handshake_req_submit_test6(struct kunit *test)
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KUNIT_EXPECT_EQ(test, err, -EBUSY);
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handshake_req_cancel(sock->sk);
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sock_release(sock);
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fput(filp);
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}
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static void handshake_req_cancel_test1(struct kunit *test)
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@ -340,7 +340,7 @@ static void handshake_req_cancel_test1(struct kunit *test)
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/* Assert */
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KUNIT_EXPECT_TRUE(test, result);
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sock_release(sock);
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fput(filp);
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}
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static void handshake_req_cancel_test2(struct kunit *test)
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@ -382,7 +382,7 @@ static void handshake_req_cancel_test2(struct kunit *test)
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/* Assert */
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KUNIT_EXPECT_TRUE(test, result);
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sock_release(sock);
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fput(filp);
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}
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static void handshake_req_cancel_test3(struct kunit *test)
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@ -427,7 +427,7 @@ static void handshake_req_cancel_test3(struct kunit *test)
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/* Assert */
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KUNIT_EXPECT_FALSE(test, result);
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sock_release(sock);
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fput(filp);
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}
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static struct handshake_req *handshake_req_destroy_test;
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@ -471,7 +471,7 @@ static void handshake_req_destroy_test1(struct kunit *test)
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handshake_req_cancel(sock->sk);
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/* Act */
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sock_release(sock);
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fput(filp);
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/* Assert */
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KUNIT_EXPECT_PTR_EQ(test, handshake_req_destroy_test, req);
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