1. 24 Aug, 2017 1 commit
    • Chunyu Hu's avatar
      tracing: Fix kmemleak in tracing_map_array_free() · 475bb3c6
      Chunyu Hu authored
      kmemleak reported the below leak when I was doing clear of the hist
      trigger. With this patch, the kmeamleak is gone.
      
      unreferenced object 0xffff94322b63d760 (size 32):
        comm "bash", pid 1522, jiffies 4403687962 (age 2442.311s)
        hex dump (first 32 bytes):
          00 01 00 00 04 00 00 00 08 00 00 00 ff 00 00 00  ................
          10 00 00 00 00 00 00 00 80 a8 7a f2 31 94 ff ff  ..........z.1...
        backtrace:
          [<ffffffff9e96c27a>] kmemleak_alloc+0x4a/0xa0
          [<ffffffff9e424cba>] kmem_cache_alloc_trace+0xca/0x1d0
          [<ffffffff9e377736>] tracing_map_array_alloc+0x26/0x140
          [<ffffffff9e261be0>] kretprobe_trampoline+0x0/0x50
          [<ffffffff9e38b935>] create_hist_data+0x535/0x750
          [<ffffffff9e38bd47>] event_hist_trigger_func+0x1f7/0x420
          [<ffffffff9e38893d>] event_trigger_write+0xfd/0x1a0
          [<ffffffff9e44dfc7>] __vfs_write+0x37/0x170
          [<ffffffff9e44f552>] vfs_write+0xb2/0x1b0
          [<ffffffff9e450b85>] SyS_write+0x55/0xc0
          [<ffffffff9e203857>] do_syscall_64+0x67/0x150
          [<ffffffff9e977ce7>] return_from_SYSCALL_64+0x0/0x6a
          [<ffffffffffffffff>] 0xffffffffffffffff
      unreferenced object 0xffff9431f27aa880 (size 128):
        comm "bash", pid 1522, jiffies 4403687962 (age 2442.311s)
        hex dump (first 32 bytes):
          00 00 8c 2a 32 94 ff ff 00 f0 8b 2a 32 94 ff ff  ...*2......*2...
          00 e0 8b 2a 32 94 ff ff 00 d0 8b 2a 32 94 ff ff  ...*2......*2...
        backtrace:
          [<ffffffff9e96c27a>] kmemleak_alloc+0x4a/0xa0
          [<ffffffff9e425348>] __kmalloc+0xe8/0x220
          [<ffffffff9e3777c1>] tracing_map_array_alloc+0xb1/0x140
          [<ffffffff9e261be0>] kretprobe_trampoline+0x0/0x50
          [<ffffffff9e38b935>] create_hist_data+0x535/0x750
          [<ffffffff9e38bd47>] event_hist_trigger_func+0x1f7/0x420
          [<ffffffff9e38893d>] event_trigger_write+0xfd/0x1a0
          [<ffffffff9e44dfc7>] __vfs_write+0x37/0x170
          [<ffffffff9e44f552>] vfs_write+0xb2/0x1b0
          [<ffffffff9e450b85>] SyS_write+0x55/0xc0
          [<ffffffff9e203857>] do_syscall_64+0x67/0x150
          [<ffffffff9e977ce7>] return_from_SYSCALL_64+0x0/0x6a
          [<ffffffffffffffff>] 0xffffffffffffffff
      
      Link: http://lkml.kernel.org/r/1502705898-27571-1-git-send-email-chuhu@redhat.com
      
      Cc: stable@vger.kernel.org
      Fixes: 08d43a5f ("tracing: Add lock-free tracing_map")
      Signed-off-by: default avatarChunyu Hu <chuhu@redhat.com>
      Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      475bb3c6
  2. 26 Apr, 2016 2 commits
  3. 19 Apr, 2016 2 commits