4.4-stable patches

added patches:
	jffs2-check-the-validity-of-dstlen-in-jffs2_zlib_compress.patch

diff --git a/queue-4.4/jffs2-check-the-validity-of-dstlen-in-jffs2_zlib_compress.patch b/queue-4.4/jffs2-check-the-validity-of-dstlen-in-jffs2_zlib_compress.patch
new file mode 100644 (file)
index 0000000..7fcc90d
--- /dev/null
+++ b/queue-4.4/jffs2-check-the-validity-of-dstlen-in-jffs2_zlib_compress.patch
@@ -0,0 +1,103 @@
+From 90ada91f4610c5ef11bc52576516d96c496fc3f1 Mon Sep 17 00:00:00 2001
+From: Yang Yang <yang.yang29@zte.com.cn>
+Date: Thu, 28 Jan 2021 02:55:35 -0800
+Subject: jffs2: check the validity of dstlen in jffs2_zlib_compress()
+
+From: Yang Yang <yang.yang29@zte.com.cn>
+
+commit 90ada91f4610c5ef11bc52576516d96c496fc3f1 upstream.
+
+KASAN reports a BUG when download file in jffs2 filesystem.It is
+because when dstlen == 1, cpage_out will write array out of bounds.
+Actually, data will not be compressed in jffs2_zlib_compress() if
+data's length less than 4.
+
+[  393.799778] BUG: KASAN: slab-out-of-bounds in jffs2_rtime_compress+0x214/0x2f0 at addr ffff800062e3b281
+[  393.809166] Write of size 1 by task tftp/2918
+[  393.813526] CPU: 3 PID: 2918 Comm: tftp Tainted: G    B           4.9.115-rt93-EMBSYS-CGEL-6.1.R6-dirty #1
+[  393.823173] Hardware name: LS1043A RDB Board (DT)
+[  393.827870] Call trace:
+[  393.830322] [<ffff20000808c700>] dump_backtrace+0x0/0x2f0
+[  393.835721] [<ffff20000808ca04>] show_stack+0x14/0x20
+[  393.840774] [<ffff2000086ef700>] dump_stack+0x90/0xb0
+[  393.845829] [<ffff20000827b19c>] kasan_object_err+0x24/0x80
+[  393.851402] [<ffff20000827b404>] kasan_report_error+0x1b4/0x4d8
+[  393.857323] [<ffff20000827bae8>] kasan_report+0x38/0x40
+[  393.862548] [<ffff200008279d44>] __asan_store1+0x4c/0x58
+[  393.867859] [<ffff2000084ce2ec>] jffs2_rtime_compress+0x214/0x2f0
+[  393.873955] [<ffff2000084bb3b0>] jffs2_selected_compress+0x178/0x2a0
+[  393.880308] [<ffff2000084bb530>] jffs2_compress+0x58/0x478
+[  393.885796] [<ffff2000084c5b34>] jffs2_write_inode_range+0x13c/0x450
+[  393.892150] [<ffff2000084be0b8>] jffs2_write_end+0x2a8/0x4a0
+[  393.897811] [<ffff2000081f3008>] generic_perform_write+0x1c0/0x280
+[  393.903990] [<ffff2000081f5074>] __generic_file_write_iter+0x1c4/0x228
+[  393.910517] [<ffff2000081f5210>] generic_file_write_iter+0x138/0x288
+[  393.916870] [<ffff20000829ec1c>] __vfs_write+0x1b4/0x238
+[  393.922181] [<ffff20000829ff00>] vfs_write+0xd0/0x238
+[  393.927232] [<ffff2000082a1ba8>] SyS_write+0xa0/0x110
+[  393.932283] [<ffff20000808429c>] __sys_trace_return+0x0/0x4
+[  393.937851] Object at ffff800062e3b280, in cache kmalloc-64 size: 64
+[  393.944197] Allocated:
+[  393.946552] PID = 2918
+[  393.948913]  save_stack_trace_tsk+0x0/0x220
+[  393.953096]  save_stack_trace+0x18/0x20
+[  393.956932]  kasan_kmalloc+0xd8/0x188
+[  393.960594]  __kmalloc+0x144/0x238
+[  393.963994]  jffs2_selected_compress+0x48/0x2a0
+[  393.968524]  jffs2_compress+0x58/0x478
+[  393.972273]  jffs2_write_inode_range+0x13c/0x450
+[  393.976889]  jffs2_write_end+0x2a8/0x4a0
+[  393.980810]  generic_perform_write+0x1c0/0x280
+[  393.985251]  __generic_file_write_iter+0x1c4/0x228
+[  393.990040]  generic_file_write_iter+0x138/0x288
+[  393.994655]  __vfs_write+0x1b4/0x238
+[  393.998228]  vfs_write+0xd0/0x238
+[  394.001543]  SyS_write+0xa0/0x110
+[  394.004856]  __sys_trace_return+0x0/0x4
+[  394.008684] Freed:
+[  394.010691] PID = 2918
+[  394.013051]  save_stack_trace_tsk+0x0/0x220
+[  394.017233]  save_stack_trace+0x18/0x20
+[  394.021069]  kasan_slab_free+0x88/0x188
+[  394.024902]  kfree+0x6c/0x1d8
+[  394.027868]  jffs2_sum_write_sumnode+0x2c4/0x880
+[  394.032486]  jffs2_do_reserve_space+0x198/0x598
+[  394.037016]  jffs2_reserve_space+0x3f8/0x4d8
+[  394.041286]  jffs2_write_inode_range+0xf0/0x450
+[  394.045816]  jffs2_write_end+0x2a8/0x4a0
+[  394.049737]  generic_perform_write+0x1c0/0x280
+[  394.054179]  __generic_file_write_iter+0x1c4/0x228
+[  394.058968]  generic_file_write_iter+0x138/0x288
+[  394.063583]  __vfs_write+0x1b4/0x238
+[  394.067157]  vfs_write+0xd0/0x238
+[  394.070470]  SyS_write+0xa0/0x110
+[  394.073783]  __sys_trace_return+0x0/0x4
+[  394.077612] Memory state around the buggy address:
+[  394.082404]  ffff800062e3b180: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
+[  394.089623]  ffff800062e3b200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
+[  394.096842] >ffff800062e3b280: 01 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
+[  394.104056]                    ^
+[  394.107283]  ffff800062e3b300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
+[  394.114502]  ffff800062e3b380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
+[  394.121718] ==================================================================
+
+Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
+Cc: Joel Stanley <joel@jms.id.au>
+Signed-off-by: Richard Weinberger <richard@nod.at>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ fs/jffs2/compr_rtime.c |    3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/fs/jffs2/compr_rtime.c
++++ b/fs/jffs2/compr_rtime.c
+@@ -37,6 +37,9 @@ static int jffs2_rtime_compress(unsigned
+       int outpos = 0;
+       int pos=0;
+ 
++      if (*dstlen <= 3)
++              return -1;
++
+       memset(positions,0,sizeof(positions));
+ 
+       while (pos < (*sourcelen) && outpos <= (*dstlen)-2) {

diff --git a/queue-4.4/series b/queue-4.4/series
index 4ae770b804da87953408df428441c34375fbe733..4e8c6d837a0aba8939ac006ee4a203b3874e90fa 100644 (file)
--- a/queue-4.4/series
+++ b/queue-4.4/series
@@ -43,3 +43,4 @@ openvswitch-fix-stack-oob-read-while-fragmenting-ipv4-packets.patch
 jffs2-fix-kasan-slab-out-of-bounds-problem.patch
 powerpc-eeh-fix-eeh-handling-for-hugepages-in-ioremap-space.patch
 powerpc-fix-edeadlock-redefinition-error-in-uapi-asm-errno.h.patch
+jffs2-check-the-validity-of-dstlen-in-jffs2_zlib_compress.patch