diff --git a/RDS-verify-the-underlying-transport-exists-before-cr.patch b/RDS-verify-the-underlying-transport-exists-before-cr.patch new file mode 100644 index 0000000..eb39c1f --- /dev/null +++ b/RDS-verify-the-underlying-transport-exists-before-cr.patch @@ -0,0 +1,79 @@ +From 74e98eb085889b0d2d4908f59f6e00026063014f Mon Sep 17 00:00:00 2001 +From: Sasha Levin +Date: Tue, 8 Sep 2015 10:53:40 -0400 +Subject: [PATCH] RDS: verify the underlying transport exists before creating a + connection + +There was no verification that an underlying transport exists when creating +a connection, this would cause dereferencing a NULL ptr. + +It might happen on sockets that weren't properly bound before attempting to +send a message, which will cause a NULL ptr deref: + +[135546.047719] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN +[135546.051270] Modules linked in: +[135546.051781] CPU: 4 PID: 15650 Comm: trinity-c4 Not tainted 4.2.0-next-20150902-sasha-00041-gbaa1222-dirty #2527 +[135546.053217] task: ffff8800835bc000 ti: ffff8800bc708000 task.ti: ffff8800bc708000 +[135546.054291] RIP: __rds_conn_create (net/rds/connection.c:194) +[135546.055666] RSP: 0018:ffff8800bc70fab0 EFLAGS: 00010202 +[135546.056457] RAX: dffffc0000000000 RBX: 0000000000000f2c RCX: ffff8800835bc000 +[135546.057494] RDX: 0000000000000007 RSI: ffff8800835bccd8 RDI: 0000000000000038 +[135546.058530] RBP: ffff8800bc70fb18 R08: 0000000000000001 R09: 0000000000000000 +[135546.059556] R10: ffffed014d7a3a23 R11: ffffed014d7a3a21 R12: 0000000000000000 +[135546.060614] R13: 0000000000000001 R14: ffff8801ec3d0000 R15: 0000000000000000 +[135546.061668] FS: 00007faad4ffb700(0000) GS:ffff880252000000(0000) knlGS:0000000000000000 +[135546.062836] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b +[135546.063682] CR2: 000000000000846a CR3: 000000009d137000 CR4: 00000000000006a0 +[135546.064723] Stack: +[135546.065048] ffffffffafe2055c ffffffffafe23fc1 ffffed00493097bf ffff8801ec3d0008 +[135546.066247] 0000000000000000 00000000000000d0 0000000000000000 ac194a24c0586342 +[135546.067438] 1ffff100178e1f78 ffff880320581b00 ffff8800bc70fdd0 ffff880320581b00 +[135546.068629] Call Trace: +[135546.069028] ? __rds_conn_create (include/linux/rcupdate.h:856 net/rds/connection.c:134) +[135546.069989] ? rds_message_copy_from_user (net/rds/message.c:298) +[135546.071021] rds_conn_create_outgoing (net/rds/connection.c:278) +[135546.071981] rds_sendmsg (net/rds/send.c:1058) +[135546.072858] ? perf_trace_lock (include/trace/events/lock.h:38) +[135546.073744] ? lockdep_init (kernel/locking/lockdep.c:3298) +[135546.074577] ? rds_send_drop_to (net/rds/send.c:976) +[135546.075508] ? __might_fault (./arch/x86/include/asm/current.h:14 mm/memory.c:3795) +[135546.076349] ? __might_fault (mm/memory.c:3795) +[135546.077179] ? rds_send_drop_to (net/rds/send.c:976) +[135546.078114] sock_sendmsg (net/socket.c:611 net/socket.c:620) +[135546.078856] SYSC_sendto (net/socket.c:1657) +[135546.079596] ? SYSC_connect (net/socket.c:1628) +[135546.080510] ? trace_dump_stack (kernel/trace/trace.c:1926) +[135546.081397] ? ring_buffer_unlock_commit (kernel/trace/ring_buffer.c:2479 kernel/trace/ring_buffer.c:2558 kernel/trace/ring_buffer.c:2674) +[135546.082390] ? trace_buffer_unlock_commit (kernel/trace/trace.c:1749) +[135546.083410] ? trace_event_raw_event_sys_enter (include/trace/events/syscalls.h:16) +[135546.084481] ? do_audit_syscall_entry (include/trace/events/syscalls.h:16) +[135546.085438] ? trace_buffer_unlock_commit (kernel/trace/trace.c:1749) +[135546.085515] rds_ib_laddr_check(): addr 36.74.25.172 ret -99 node type -1 + +Acked-by: Santosh Shilimkar +Signed-off-by: Sasha Levin +Signed-off-by: David S. Miller +--- + net/rds/connection.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/net/rds/connection.c b/net/rds/connection.c +index 9b2de5e67d79..49adeef8090c 100644 +--- a/net/rds/connection.c ++++ b/net/rds/connection.c +@@ -190,6 +190,12 @@ new_conn: + } + } + ++ if (trans == NULL) { ++ kmem_cache_free(rds_conn_slab, conn); ++ conn = ERR_PTR(-ENODEV); ++ goto out; ++ } ++ + conn->c_trans = trans; + + ret = trans->conn_alloc(conn, gfp); +-- +2.4.3 + diff --git a/kernel.spec b/kernel.spec index 6aaec75..ff5a8ff 100644 --- a/kernel.spec +++ b/kernel.spec @@ -612,6 +612,9 @@ Patch519: make-flush-workqueue-available-to-non-GPL-modules.patch #rhbz 1237136 Patch522: block-blkg_destroy_all-should-clear-q-root_blkg-and-.patch +#CVE-2015-6937 rhbz 1263139 1263140 +Patch523: RDS-verify-the-underlying-transport-exists-before-cr.patch + # END OF PATCH DEFINITIONS %endif @@ -2056,6 +2059,9 @@ fi # # %changelog +* Tue Sep 15 2015 Josh Boyer +- CVE-2015-6937 net: rds null pointer (rhbz 1263139 1263140) + * Wed Sep 9 2015 Peter Robinson - Minor ARMv7/aarch64 config updates