KASAN: use-after-free Read in squashfs_get_id
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syzbot
Nov 14, 2020, 4:14:17 AM11/14/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 31acccdc Linux 4.19.157
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=160f1bba500000
kernel config: https://syzkaller.appspot.com/x/.config?x=1f604e014c43fe09
dashboard link: https://syzkaller.appspot.com/bug?extid=b06d57ba83f604522af2
compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b06d57...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
Read of size 8 at addr ffff888096c3a840 by task syz-executor.0/10828
CPU: 1 PID: 10828 Comm: syz-executor.0 Not tainted 4.19.157-syzkaller #0
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+0x1fc/0x2fe lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
squashfs_new_inode fs/squashfs/inode.c:64 [inline]
squashfs_read_inode+0x1b4/0x1b40 fs/squashfs/inode.c:133
squashfs_fill_super+0x1655/0x1c00 fs/squashfs/super.c:318
mount_bdev+0x2fc/0x3b0 fs/super.c:1158
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x46090a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f1dcede8a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f1dcede8b20 RCX: 000000000046090a
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007f1dcede8ae0
RBP: 00007f1dcede8ae0 R08: 00007f1dcede8b20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 00000000200000c0 R14: 0000000020000200 R15: 0000000020010200
Allocated by task 9837:
__do_kmalloc mm/slab.c:3727 [inline]
__kmalloc+0x15a/0x3c0 mm/slab.c:3736
kmalloc_array include/linux/slab.h:637 [inline]
kcalloc include/linux/slab.h:648 [inline]
squashfs_cache_init+0x3a6/0x740 fs/squashfs/cache.c:271
squashfs_fill_super+0xa94/0x1c00 fs/squashfs/super.c:204
mount_bdev+0x2fc/0x3b0 fs/super.c:1158
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 9837:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
squashfs_cache_delete.part.0+0x248/0x370 fs/squashfs/cache.c:221
squashfs_cache_delete+0x1b/0x30 fs/squashfs/cache.c:214
squashfs_fill_super+0x248/0x1c00 fs/squashfs/super.c:338
mount_bdev+0x2fc/0x3b0 fs/super.c:1158
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff888096c3a840
which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
32-byte region [ffff888096c3a840, ffff888096c3a860)
The buggy address belongs to the page:
page:ffffea00025b0e80 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff888096c3afc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002cf6a48 ffffea0002a58f48 ffff88813bff01c0
raw: ffff888096c3afc1 ffff888096c3a000 0000000100000038 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888096c3a700: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff888096c3a780: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
>ffff888096c3a800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
^
ffff888096c3a880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff888096c3a900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================
squashfs: SQUASHFS error: Filesystem uses "lzma" compression. This is not supported
SQUASHFS error: squashfs_read_data failed to read block 0x6081
SQUASHFS error: Unable to read metadata cache entry [6081]
SQUASHFS error: Unable to read inode 0x6000011a
squashfs: SQUASHFS error: Filesystem uses "lzma" compression. This is not supported
SQUASHFS error: squashfs_read_data failed to read block 0x6081
SQUASHFS error: Unable to read metadata cache entry [6081]
SQUASHFS error: Unable to read inode 0x6000011a
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 31acccdc Linux 4.19.157
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=160f1bba500000
kernel config: https://syzkaller.appspot.com/x/.config?x=1f604e014c43fe09
dashboard link: https://syzkaller.appspot.com/bug?extid=b06d57ba83f604522af2
compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b06d57...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
Read of size 8 at addr ffff888096c3a840 by task syz-executor.0/10828
CPU: 1 PID: 10828 Comm: syz-executor.0 Not tainted 4.19.157-syzkaller #0
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+0x1fc/0x2fe lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
squashfs_new_inode fs/squashfs/inode.c:64 [inline]
squashfs_read_inode+0x1b4/0x1b40 fs/squashfs/inode.c:133
squashfs_fill_super+0x1655/0x1c00 fs/squashfs/super.c:318
mount_bdev+0x2fc/0x3b0 fs/super.c:1158
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x46090a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f1dcede8a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f1dcede8b20 RCX: 000000000046090a
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007f1dcede8ae0
RBP: 00007f1dcede8ae0 R08: 00007f1dcede8b20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 00000000200000c0 R14: 0000000020000200 R15: 0000000020010200
Allocated by task 9837:
__do_kmalloc mm/slab.c:3727 [inline]
__kmalloc+0x15a/0x3c0 mm/slab.c:3736
kmalloc_array include/linux/slab.h:637 [inline]
kcalloc include/linux/slab.h:648 [inline]
squashfs_cache_init+0x3a6/0x740 fs/squashfs/cache.c:271
squashfs_fill_super+0xa94/0x1c00 fs/squashfs/super.c:204
mount_bdev+0x2fc/0x3b0 fs/super.c:1158
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 9837:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
squashfs_cache_delete.part.0+0x248/0x370 fs/squashfs/cache.c:221
squashfs_cache_delete+0x1b/0x30 fs/squashfs/cache.c:214
squashfs_fill_super+0x248/0x1c00 fs/squashfs/super.c:338
mount_bdev+0x2fc/0x3b0 fs/super.c:1158
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff888096c3a840
which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
32-byte region [ffff888096c3a840, ffff888096c3a860)
The buggy address belongs to the page:
page:ffffea00025b0e80 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff888096c3afc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002cf6a48 ffffea0002a58f48 ffff88813bff01c0
raw: ffff888096c3afc1 ffff888096c3a000 0000000100000038 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888096c3a700: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff888096c3a780: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
>ffff888096c3a800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
^
ffff888096c3a880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff888096c3a900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================
squashfs: SQUASHFS error: Filesystem uses "lzma" compression. This is not supported
SQUASHFS error: squashfs_read_data failed to read block 0x6081
SQUASHFS error: Unable to read metadata cache entry [6081]
SQUASHFS error: Unable to read inode 0x6000011a
squashfs: SQUASHFS error: Filesystem uses "lzma" compression. This is not supported
SQUASHFS error: squashfs_read_data failed to read block 0x6081
SQUASHFS error: Unable to read metadata cache entry [6081]
SQUASHFS error: Unable to read inode 0x6000011a
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Nov 14, 2020, 4:28:22 AM11/14/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 31acccdc Linux 4.19.157
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16e46baa500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1299e726500000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b06d57...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
Read of size 8 at addr ffff8880a9f9d400 by task syz-executor999/8155
CPU: 0 PID: 8155 Comm: syz-executor999 Not tainted 4.19.157-syzkaller #0
Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffeaacb9378 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffeaacb93d0 RCX: 0000000000446d1a
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007ffeaacb9390
RBP: 00007ffeaacb9390 R08: 00007ffeaacb93d0 R09: 00007ffe00000015
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003
Allocated by task 14:
kzalloc include/linux/slab.h:709 [inline]
rh_call_control drivers/usb/core/hcd.c:510 [inline]
rh_urb_enqueue drivers/usb/core/hcd.c:838 [inline]
usb_hcd_submit_urb+0x656/0x23c0 drivers/usb/core/hcd.c:1651
usb_submit_urb+0xb2f/0x13b0 drivers/usb/core/urb.c:571
usb_start_wait_urb+0x108/0x4c0 drivers/usb/core/message.c:57
usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
get_port_status drivers/usb/core/hub.c:571 [inline]
hub_ext_port_status+0x112/0x4b0 drivers/usb/core/hub.c:588
hub_port_status drivers/usb/core/hub.c:610 [inline]
hub_activate+0x515/0x19b0 drivers/usb/core/hub.c:1092
process_one_work+0x864/0x1570 kernel/workqueue.c:2155
worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Freed by task 14:
rh_urb_enqueue drivers/usb/core/hcd.c:838 [inline]
usb_hcd_submit_urb+0xb93/0x23c0 drivers/usb/core/hcd.c:1651
usb_submit_urb+0xb2f/0x13b0 drivers/usb/core/urb.c:571
usb_start_wait_urb+0x108/0x4c0 drivers/usb/core/message.c:57
usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
get_port_status drivers/usb/core/hub.c:571 [inline]
hub_ext_port_status+0x112/0x4b0 drivers/usb/core/hub.c:588
hub_port_status drivers/usb/core/hub.c:610 [inline]
hub_activate+0x515/0x19b0 drivers/usb/core/hub.c:1092
process_one_work+0x864/0x1570 kernel/workqueue.c:2155
worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
The buggy address belongs to the object at ffff8880a9f9d400
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002a71348 ffff88813bff1238 ffff88813bff01c0
raw: ffff8880a9f9dfc1 ffff8880a9f9d000 0000000100000022 0000000000000000
ffff8880a9f9d380: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8880a9f9d400: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
^
ffff8880a9f9d480: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff8880a9f9d500: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================
HEAD commit: 31acccdc Linux 4.19.157
git tree: linux-4.19.y
kernel config: https://syzkaller.appspot.com/x/.config?x=1f604e014c43fe09
dashboard link: https://syzkaller.appspot.com/bug?extid=b06d57ba83f604522af2
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16cbb7be500000
dashboard link: https://syzkaller.appspot.com/bug?extid=b06d57ba83f604522af2
compiler: gcc (GCC) 10.1.0-syz 20200507
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1299e726500000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b06d57...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
CPU: 0 PID: 8155 Comm: syz-executor999 Not tainted 4.19.157-syzkaller #0
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+0x1fc/0x2fe lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
squashfs_new_inode fs/squashfs/inode.c:64 [inline]
squashfs_read_inode+0x1b4/0x1b40 fs/squashfs/inode.c:133
squashfs_fill_super+0x1655/0x1c00 fs/squashfs/super.c:318
mount_bdev+0x2fc/0x3b0 fs/super.c:1158
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446d1a
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
squashfs_get_id+0x1ae/0x1d0 fs/squashfs/id.c:51
squashfs_new_inode fs/squashfs/inode.c:64 [inline]
squashfs_read_inode+0x1b4/0x1b40 fs/squashfs/inode.c:133
squashfs_fill_super+0x1655/0x1c00 fs/squashfs/super.c:318
mount_bdev+0x2fc/0x3b0 fs/super.c:1158
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffeaacb9378 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffeaacb93d0 RCX: 0000000000446d1a
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007ffeaacb9390
RBP: 00007ffeaacb9390 R08: 00007ffeaacb93d0 R09: 00007ffe00000015
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003
Allocated by task 14:
__do_kmalloc mm/slab.c:3727 [inline]
__kmalloc+0x15a/0x3c0 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
__kmalloc+0x15a/0x3c0 mm/slab.c:3736
kzalloc include/linux/slab.h:709 [inline]
rh_call_control drivers/usb/core/hcd.c:510 [inline]
rh_urb_enqueue drivers/usb/core/hcd.c:838 [inline]
usb_hcd_submit_urb+0x656/0x23c0 drivers/usb/core/hcd.c:1651
usb_submit_urb+0xb2f/0x13b0 drivers/usb/core/urb.c:571
usb_start_wait_urb+0x108/0x4c0 drivers/usb/core/message.c:57
usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
get_port_status drivers/usb/core/hub.c:571 [inline]
hub_ext_port_status+0x112/0x4b0 drivers/usb/core/hub.c:588
hub_port_status drivers/usb/core/hub.c:610 [inline]
hub_activate+0x515/0x19b0 drivers/usb/core/hub.c:1092
process_one_work+0x864/0x1570 kernel/workqueue.c:2155
worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Freed by task 14:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
rh_call_control drivers/usb/core/hcd.c:728 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
rh_urb_enqueue drivers/usb/core/hcd.c:838 [inline]
usb_hcd_submit_urb+0xb93/0x23c0 drivers/usb/core/hcd.c:1651
usb_submit_urb+0xb2f/0x13b0 drivers/usb/core/urb.c:571
usb_start_wait_urb+0x108/0x4c0 drivers/usb/core/message.c:57
usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
get_port_status drivers/usb/core/hub.c:571 [inline]
hub_ext_port_status+0x112/0x4b0 drivers/usb/core/hub.c:588
hub_port_status drivers/usb/core/hub.c:610 [inline]
hub_activate+0x515/0x19b0 drivers/usb/core/hub.c:1092
process_one_work+0x864/0x1570 kernel/workqueue.c:2155
worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
The buggy address belongs to the object at ffff8880a9f9d400
which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
32-byte region [ffff8880a9f9d400, ffff8880a9f9d420)
The buggy address is located 0 bytes inside of
The buggy address belongs to the page:
page:ffffea0002a7e740 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880a9f9dfc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002a71348 ffff88813bff1238 ffff88813bff01c0
raw: ffff8880a9f9dfc1 ffff8880a9f9d000 0000000100000022 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880a9f9d300: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
Memory state around the buggy address:
ffff8880a9f9d380: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8880a9f9d400: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
^
ffff8880a9f9d480: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff8880a9f9d500: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================
syzbot
Nov 19, 2020, 1:44:20 AM11/19/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 8961076e Linux 4.14.207
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14f786a6500000
kernel config: https://syzkaller.appspot.com/x/.config?x=44f5233cc1f5c95d
dashboard link: https://syzkaller.appspot.com/bug?extid=c021ba012da41ee9807c
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14b809d6500000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c021ba...@syzkaller.appspotmail.com
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
==================================================================
BUG: KASAN: use-after-free in squashfs_get_id+0x181/0x1a0 fs/squashfs/id.c:51
Read of size 8 at addr ffff8880afd02300 by task syz-executor182/7993
CPU: 1 PID: 7993 Comm: syz-executor182 Not tainted 4.14.207-syzkaller #0
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
kasan_report mm/kasan/report.c:409 [inline]
__asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
squashfs_get_id+0x181/0x1a0 fs/squashfs/id.c:51
squashfs_new_inode fs/squashfs/inode.c:64 [inline]
squashfs_read_inode+0x185/0x19e0 fs/squashfs/inode.c:133
squashfs_fill_super+0x1501/0x1aa0 fs/squashfs/super.c:318
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x44dcda
RSP: 002b:00007fff2b2414c8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fff2b241520 RCX: 000000000044dcda
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fff2b2414e0
RBP: 0000000000000004 R08: 00007fff2b241520 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 00007fff2b2414e0 R14: 0000000000000000 R15: 0000000020000228
Allocated by task 7993:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15a/0x400 mm/slab.c:3729
kmalloc_array include/linux/slab.h:607 [inline]
kcalloc include/linux/slab.h:618 [inline]
squashfs_read_table+0x76/0x18d fs/squashfs/cache.c:430
squashfs_read_xattr_id_table+0x16a/0x200 fs/squashfs/xattr_id.c:94
squashfs_fill_super+0xb6c/0x1aa0 fs/squashfs/super.c:233
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
Freed by task 7993:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xc9/0x250 mm/slab.c:3815
squashfs_read_table+0x127/0x18d fs/squashfs/cache.c:448
squashfs_read_xattr_id_table+0x16a/0x200 fs/squashfs/xattr_id.c:94
squashfs_fill_super+0xb6c/0x1aa0 fs/squashfs/super.c:233
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
The buggy address belongs to the object at ffff8880afd02300
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff8880afd02000 ffff8880afd02fc1 000000010000003f
raw: ffffea0002d214a0 ffffea0002bc8760 ffff88813fe821c0 0000000000000000
ffff8880afd02280: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8880afd02300: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
^
ffff8880afd02380: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff8880afd02400: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
syzbot found the following issue on:
HEAD commit: 8961076e Linux 4.14.207
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14f786a6500000
kernel config: https://syzkaller.appspot.com/x/.config?x=44f5233cc1f5c95d
dashboard link: https://syzkaller.appspot.com/bug?extid=c021ba012da41ee9807c
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1236a81c500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14b809d6500000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
==================================================================
BUG: KASAN: use-after-free in squashfs_get_id+0x181/0x1a0 fs/squashfs/id.c:51
Read of size 8 at addr ffff8880afd02300 by task syz-executor182/7993
CPU: 1 PID: 7993 Comm: syz-executor182 Not tainted 4.14.207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
Call Trace:
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
kasan_report mm/kasan/report.c:409 [inline]
__asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
squashfs_get_id+0x181/0x1a0 fs/squashfs/id.c:51
squashfs_new_inode fs/squashfs/inode.c:64 [inline]
squashfs_read_inode+0x185/0x19e0 fs/squashfs/inode.c:133
squashfs_fill_super+0x1501/0x1aa0 fs/squashfs/super.c:318
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x44dcda
RSP: 002b:00007fff2b2414c8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fff2b241520 RCX: 000000000044dcda
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fff2b2414e0
RBP: 0000000000000004 R08: 00007fff2b241520 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 00007fff2b2414e0 R14: 0000000000000000 R15: 0000000020000228
Allocated by task 7993:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15a/0x400 mm/slab.c:3729
kmalloc_array include/linux/slab.h:607 [inline]
kcalloc include/linux/slab.h:618 [inline]
squashfs_read_table+0x76/0x18d fs/squashfs/cache.c:430
squashfs_read_xattr_id_table+0x16a/0x200 fs/squashfs/xattr_id.c:94
squashfs_fill_super+0xb6c/0x1aa0 fs/squashfs/super.c:233
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
Freed by task 7993:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xc9/0x250 mm/slab.c:3815
squashfs_read_table+0x127/0x18d fs/squashfs/cache.c:448
squashfs_read_xattr_id_table+0x16a/0x200 fs/squashfs/xattr_id.c:94
squashfs_fill_super+0xb6c/0x1aa0 fs/squashfs/super.c:233
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
The buggy address belongs to the object at ffff8880afd02300
which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
32-byte region [ffff8880afd02300, ffff8880afd02320)
The buggy address is located 0 bytes inside of
The buggy address belongs to the page:
page:ffffea0002bf4080 count:1 mapcount:0 mapping:ffff8880afd02000 index:0xffff8880afd02fc1
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff8880afd02000 ffff8880afd02fc1 000000010000003f
raw: ffffea0002d214a0 ffffea0002bc8760 ffff88813fe821c0 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880afd02200: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
Memory state around the buggy address:
ffff8880afd02280: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8880afd02300: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
^
ffff8880afd02380: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff8880afd02400: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
https://goo.gl/tpsmEJ#testing-patches
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