summaryrefslogtreecommitdiff
path: root/tests/fuzz-tests/images/bko-97041-invalid-sub-stripes-zero-FPE.raw.txt
diff options
context:
space:
mode:
Diffstat (limited to 'tests/fuzz-tests/images/bko-97041-invalid-sub-stripes-zero-FPE.raw.txt')
-rw-r--r--tests/fuzz-tests/images/bko-97041-invalid-sub-stripes-zero-FPE.raw.txt50
1 files changed, 50 insertions, 0 deletions
diff --git a/tests/fuzz-tests/images/bko-97041-invalid-sub-stripes-zero-FPE.raw.txt b/tests/fuzz-tests/images/bko-97041-invalid-sub-stripes-zero-FPE.raw.txt
new file mode 100644
index 00000000..5f631646
--- /dev/null
+++ b/tests/fuzz-tests/images/bko-97041-invalid-sub-stripes-zero-FPE.raw.txt
@@ -0,0 +1,50 @@
+URL: https://bugzilla.kernel.org/show_bug.cgi?id=97041
+ Lukas Lueg 2015-04-21 21:53:14 UTC
+
+The btrfs-image attached to this bug causes the userland tools v3.19.1 to
+crash with a SIGFPE. The problem is that map->sub_stripes in
+__btrfs_map_block() is allowed to be 0 before entering a division.
+
+The userland tool crashes. The kernel reports a "divide error: 0000 ..."
+with a traceback from __btrfs_map_block()
+
+
+(gdb) run check btrfs_fukked_sigfpe_volumes:1404.bin
+Starting program: /usr/sbin/btrfs check btrfs_fukked_sigfpe_volumes:1404.bin
+[Thread debugging using libthread_db enabled]
+Using host libthread_db library "/lib64/libthread_db.so.1".
+
+Program received signal SIGFPE, Arithmetic exception.
+0x000000000044d7b6 in __btrfs_map_block (map_tree=map_tree@entry=0x88c170,
+ rw=rw@entry=0, logical=<optimized out>, length=length@entry=0x7fffffffd8f0,
+ type=type@entry=0x0, multi_ret=multi_ret@entry=0x7fffffffd8e8, mirror_num=0,
+ raid_map_ret=0x0) at volumes.c:1404
+1404 int factor = map->num_stripes / map->sub_stripes;
+(gdb) bt
+#0 0x000000000044d7b6 in __btrfs_map_block (map_tree=map_tree@entry=0x88c170,
+ rw=rw@entry=0, logical=<optimized out>, length=length@entry=0x7fffffffd8f0,
+ type=type@entry=0x0, multi_ret=multi_ret@entry=0x7fffffffd8e8, mirror_num=0,
+ raid_map_ret=0x0) at volumes.c:1404
+#1 0x000000000044db45 in btrfs_map_block (map_tree=map_tree@entry=0x88c170,
+ rw=rw@entry=0, logical=<optimized out>, length=length@entry=0x7fffffffd8f0,
+ multi_ret=multi_ret@entry=0x7fffffffd8e8, mirror_num=mirror_num@entry=0,
+ raid_map_ret=0x0) at volumes.c:1291
+#2 0x000000000043b22d in read_whole_eb (info=0x88c010, eb=eb@entry=0x88f400,
+ mirror=mirror@entry=0) at disk-io.c:232
+#3 0x000000000043caa2 in read_tree_block (root=root@entry=0x88c710,
+ bytenr=<optimized out>, blocksize=<optimized out>, parent_transid=5)
+ at disk-io.c:295
+#4 0x000000000043d5df in btrfs_setup_chunk_tree_and_device_map (
+ fs_info=fs_info@entry=0x88c010) at disk-io.c:1106
+#5 0x000000000043d7d1 in __open_ctree_fd (fp=fp@entry=3,
+ path=path@entry=0x7fffffffe1fa "btrfs_fukked_sigfpe_volumes:1404.bin",
+ sb_bytenr=65536, sb_bytenr@entry=0, root_tree_bytenr=root_tree_bytenr@entry=0,
+ flags=flags@entry=OPEN_CTREE_EXCLUSIVE) at disk-io.c:1190
+#6 0x000000000043d965 in open_ctree_fs_info (
+ filename=0x7fffffffe1fa "btrfs_fukked_sigfpe_volumes:1404.bin",
+ sb_bytenr=sb_bytenr@entry=0, root_tree_bytenr=root_tree_bytenr@entry=0,
+ flags=flags@entry=OPEN_CTREE_EXCLUSIVE) at disk-io.c:1231
+#7 0x0000000000427bf5 in cmd_check (argc=1, argv=0x7fffffffde90) at cmds-check.c:9326
+#8 0x000000000040e5a2 in main (argc=2, argv=0x7fffffffde90) at btrfs.c:245
+(gdb) p map->sub_stripes
+$1 = 0