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linux/net/handshake
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Jinjie Ruan 4a0f07d71b 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>
2023-09-20 11:54:49 +01:00
..
.kunitconfig net/handshake: Add Kunit tests for the handshake consumer API 2023-04-19 18:48:48 -07:00
alert.c net/handshake: Trace events for TLS Alert helpers 2023-07-28 14:07:59 -07:00
genl.c net: ynl: prefix uAPI header include with uapi/ 2023-05-26 10:30:14 +01:00
genl.h net: ynl: prefix uAPI header include with uapi/ 2023-05-26 10:30:14 +01:00
handshake-test.c net/handshake: Fix memory leak in __sock_create() and sock_alloc_file() 2023-09-20 11:54:49 +01:00
handshake.h net/handshake: Add API for sending TLS Closure alerts 2023-07-28 14:07:59 -07:00
Makefile net/handshake: Add API for sending TLS Closure alerts 2023-07-28 14:07:59 -07:00
netlink.c net/handshake: fix null-ptr-deref in handshake_nl_done_doit() 2023-09-01 07:25:14 +01:00
request.c net/handshake: remove fput() that causes use-after-free 2023-06-14 22:26:37 -07:00
tlshd.c net/handshake: Add API for sending TLS Closure alerts 2023-07-28 14:07:59 -07:00
trace.c net/handshake: Trace events for TLS Alert helpers 2023-07-28 14:07:59 -07:00