1. 24 5月, 2018 3 次提交
  2. 19 5月, 2018 9 次提交
  3. 18 5月, 2018 1 次提交
    • E
      net/smc: init conn.tx_work & conn.send_lock sooner · be7f3e59
      Eric Dumazet 提交于
      syzkaller found that following program crashes the host :
      
      {
        int fd = socket(AF_SMC, SOCK_STREAM, 0);
        int val = 1;
      
        listen(fd, 0);
        shutdown(fd, SHUT_RDWR);
        setsockopt(fd, 6, TCP_NODELAY, &val, 4);
      }
      
      Simply initialize conn.tx_work & conn.send_lock at socket creation,
      rather than deeper in the stack.
      
      ODEBUG: assert_init not available (active state 0) object type: timer_list hint:           (null)
      WARNING: CPU: 1 PID: 13988 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 lib/debugobjects.c:326
      Kernel panic - not syncing: panic_on_warn set ...
      
      CPU: 1 PID: 13988 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #46
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Call Trace:
       __dump_stack lib/dump_stack.c:77 [inline]
       dump_stack+0x1b9/0x294 lib/dump_stack.c:113
       panic+0x22f/0x4de kernel/panic.c:184
       __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
       report_bug+0x252/0x2d0 lib/bug.c:186
       fixup_bug arch/x86/kernel/traps.c:178 [inline]
       do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
       do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
       invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
      RIP: 0010:debug_print_object+0x16a/0x210 lib/debugobjects.c:326
      RSP: 0018:ffff880197a37880 EFLAGS: 00010086
      RAX: 0000000000000061 RBX: 0000000000000005 RCX: ffffc90001ed0000
      RDX: 0000000000004aaf RSI: ffffffff8160f6f1 RDI: 0000000000000001
      RBP: ffff880197a378c0 R08: ffff8801aa7a0080 R09: ffffed003b5e3eb2
      R10: ffffed003b5e3eb2 R11: ffff8801daf1f597 R12: 0000000000000001
      R13: ffffffff88d96980 R14: ffffffff87fa19a0 R15: ffffffff81666ec0
       debug_object_assert_init+0x309/0x500 lib/debugobjects.c:692
       debug_timer_assert_init kernel/time/timer.c:724 [inline]
       debug_assert_init kernel/time/timer.c:776 [inline]
       del_timer+0x74/0x140 kernel/time/timer.c:1198
       try_to_grab_pending+0x439/0x9a0 kernel/workqueue.c:1223
       mod_delayed_work_on+0x91/0x250 kernel/workqueue.c:1592
       mod_delayed_work include/linux/workqueue.h:541 [inline]
       smc_setsockopt+0x387/0x6d0 net/smc/af_smc.c:1367
       __sys_setsockopt+0x1bd/0x390 net/socket.c:1903
       __do_sys_setsockopt net/socket.c:1914 [inline]
       __se_sys_setsockopt net/socket.c:1911 [inline]
       __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911
       do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
      
      Fixes: 01d2f7e2 ("net/smc: sockopts TCP_NODELAY and TCP_CORK")
      Signed-off-by: NEric Dumazet <edumazet@google.com>
      Cc: Ursula Braun <ubraun@linux.ibm.com>
      Cc: linux-s390@vger.kernel.org
      Reported-by: Nsyzbot <syzkaller@googlegroups.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      be7f3e59
  4. 16 5月, 2018 10 次提交
  5. 15 5月, 2018 1 次提交
    • E
      net/smc: check for missing nlattrs in SMC_PNETID messages · d49baa7e
      Eric Biggers 提交于
      It's possible to crash the kernel in several different ways by sending
      messages to the SMC_PNETID generic netlink family that are missing the
      expected attributes:
      
      - Missing SMC_PNETID_NAME => null pointer dereference when comparing
        names.
      - Missing SMC_PNETID_ETHNAME => null pointer dereference accessing
        smc_pnetentry::ndev.
      - Missing SMC_PNETID_IBNAME => null pointer dereference accessing
        smc_pnetentry::smcibdev.
      - Missing SMC_PNETID_IBPORT => out of bounds array access to
        smc_ib_device::pattr[-1].
      
      Fix it by validating that all expected attributes are present and that
      SMC_PNETID_IBPORT is nonzero.
      
      Reported-by: syzbot+5cd61039dc9b8bfa6e47@syzkaller.appspotmail.com
      Fixes: 6812baab ("smc: establish pnet table management")
      Cc: <stable@vger.kernel.org> # v4.11+
      Signed-off-by: NEric Biggers <ebiggers@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      d49baa7e
  6. 04 5月, 2018 7 次提交
  7. 03 5月, 2018 5 次提交
  8. 28 4月, 2018 4 次提交