Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-13 07:31:45 +00:00
Code Issues Packages Projects Releases Wiki Activity
A mirror of the official Linux kernel repository just in case
968,681 Commits 7 Branches 861 Tags 6.6 GiB
C 97.6%
Assembly 1%
Shell 0.5%
Python 0.3%
Makefile 0.3%
347fb0cfc9
Go to file
Su Yue 347fb0cfc9 btrfs: tree-checker: check if chunk item end overflows 
While mounting a crafted image provided by user, kernel panics due to
the invalid chunk item whose end is less than start.

  [66.387422] loop: module loaded
  [66.389773] loop0: detected capacity change from 262144 to 0
  [66.427708] BTRFS: device fsid a62e00e8-e94e-4200-8217-12444de93c2e devid 1 transid 12 /dev/loop0 scanned by mount (613)
  [66.431061] BTRFS info (device loop0): disk space caching is enabled
  [66.431078] BTRFS info (device loop0): has skinny extents
  [66.437101] BTRFS error: insert state: end < start 29360127 37748736
  [66.437136] ------------[ cut here ]------------
  [66.437140] WARNING: CPU: 16 PID: 613 at fs/btrfs/extent_io.c:557 insert_state.cold+0x1a/0x46 [btrfs]
  [66.437369] CPU: 16 PID: 613 Comm: mount Tainted: G           O      5.11.0-rc1-custom #45
  [66.437374] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ArchLinux 1.14.0-1 04/01/2014
  [66.437378] RIP: 0010:insert_state.cold+0x1a/0x46 [btrfs]
  [66.437420] RSP: 0018:ffff93e5414c3908 EFLAGS: 00010286
  [66.437427] RAX: 0000000000000000 RBX: 0000000001bfffff RCX: 0000000000000000
  [66.437431] RDX: 0000000000000000 RSI: ffffffffb90d4660 RDI: 00000000ffffffff
  [66.437434] RBP: ffff93e5414c3938 R08: 0000000000000001 R09: 0000000000000001
  [66.437438] R10: ffff93e5414c3658 R11: 0000000000000000 R12: ffff8ec782d72aa0
  [66.437441] R13: ffff8ec78bc71628 R14: 0000000000000000 R15: 0000000002400000
  [66.437447] FS:  00007f01386a8580(0000) GS:ffff8ec809000000(0000) knlGS:0000000000000000
  [66.437451] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [66.437455] CR2: 00007f01382fa000 CR3: 0000000109a34000 CR4: 0000000000750ee0
  [66.437460] PKRU: 55555554
  [66.437464] Call Trace:
  [66.437475]  set_extent_bit+0x652/0x740 [btrfs]
  [66.437539]  set_extent_bits_nowait+0x1d/0x20 [btrfs]
  [66.437576]  add_extent_mapping+0x1e0/0x2f0 [btrfs]
  [66.437621]  read_one_chunk+0x33c/0x420 [btrfs]
  [66.437674]  btrfs_read_chunk_tree+0x6a4/0x870 [btrfs]
  [66.437708]  ? kvm_sched_clock_read+0x18/0x40
  [66.437739]  open_ctree+0xb32/0x1734 [btrfs]
  [66.437781]  ? bdi_register_va+0x1b/0x20
  [66.437788]  ? super_setup_bdi_name+0x79/0xd0
  [66.437810]  btrfs_mount_root.cold+0x12/0xeb [btrfs]
  [66.437854]  ? __kmalloc_track_caller+0x217/0x3b0
  [66.437873]  legacy_get_tree+0x34/0x60
  [66.437880]  vfs_get_tree+0x2d/0xc0
  [66.437888]  vfs_kern_mount.part.0+0x78/0xc0
  [66.437897]  vfs_kern_mount+0x13/0x20
  [66.437902]  btrfs_mount+0x11f/0x3c0 [btrfs]
  [66.437940]  ? kfree+0x5ff/0x670
  [66.437944]  ? __kmalloc_track_caller+0x217/0x3b0
  [66.437962]  legacy_get_tree+0x34/0x60
  [66.437974]  vfs_get_tree+0x2d/0xc0
  [66.437983]  path_mount+0x48c/0xd30
  [66.437998]  __x64_sys_mount+0x108/0x140
  [66.438011]  do_syscall_64+0x38/0x50
  [66.438018]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [66.438023] RIP: 0033:0x7f0138827f6e
  [66.438033] RSP: 002b:00007ffecd79edf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
  [66.438040] RAX: ffffffffffffffda RBX: 00007f013894c264 RCX: 00007f0138827f6e
  [66.438044] RDX: 00005593a4a41360 RSI: 00005593a4a33690 RDI: 00005593a4a3a6c0
  [66.438047] RBP: 00005593a4a33440 R08: 0000000000000000 R09: 0000000000000001
  [66.438050] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
  [66.438054] R13: 00005593a4a3a6c0 R14: 00005593a4a41360 R15: 00005593a4a33440
  [66.438078] irq event stamp: 18169
  [66.438082] hardirqs last  enabled at (18175): [<ffffffffb81154bf>] console_unlock+0x4ff/0x5f0
  [66.438088] hardirqs last disabled at (18180): [<ffffffffb8115427>] console_unlock+0x467/0x5f0
  [66.438092] softirqs last  enabled at (16910): [<ffffffffb8a00fe2>] asm_call_irq_on_stack+0x12/0x20
  [66.438097] softirqs last disabled at (16905): [<ffffffffb8a00fe2>] asm_call_irq_on_stack+0x12/0x20
  [66.438103] ---[ end trace e114b111db64298b ]---
  [66.438107] BTRFS error: found node 12582912 29360127 on insert of 37748736 29360127
  [66.438127] BTRFS critical: panic in extent_io_tree_panic:679: locking error: extent tree was modified by another thread while locked (errno=-17 Object already exists)
  [66.441069] ------------[ cut here ]------------
  [66.441072] kernel BUG at fs/btrfs/extent_io.c:679!
  [66.442064] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
  [66.443018] CPU: 16 PID: 613 Comm: mount Tainted: G        W  O      5.11.0-rc1-custom #45
  [66.444538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ArchLinux 1.14.0-1 04/01/2014
  [66.446223] RIP: 0010:extent_io_tree_panic.isra.0+0x23/0x25 [btrfs]
  [66.450878] RSP: 0018:ffff93e5414c3948 EFLAGS: 00010246
  [66.451840] RAX: 0000000000000000 RBX: 0000000001bfffff RCX: 0000000000000000
  [66.453141] RDX: 0000000000000000 RSI: ffffffffb90d4660 RDI: 00000000ffffffff
  [66.454445] RBP: ffff93e5414c3948 R08: 0000000000000001 R09: 0000000000000001
  [66.455743] R10: ffff93e5414c3658 R11: 0000000000000000 R12: ffff8ec782d728c0
  [66.457055] R13: ffff8ec78bc71628 R14: ffff8ec782d72aa0 R15: 0000000002400000
  [66.458356] FS:  00007f01386a8580(0000) GS:ffff8ec809000000(0000) knlGS:0000000000000000
  [66.459841] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [66.460895] CR2: 00007f01382fa000 CR3: 0000000109a34000 CR4: 0000000000750ee0
  [66.462196] PKRU: 55555554
  [66.462692] Call Trace:
  [66.463139]  set_extent_bit.cold+0x30/0x98 [btrfs]
  [66.464049]  set_extent_bits_nowait+0x1d/0x20 [btrfs]
  [66.490466]  add_extent_mapping+0x1e0/0x2f0 [btrfs]
  [66.514097]  read_one_chunk+0x33c/0x420 [btrfs]
  [66.534976]  btrfs_read_chunk_tree+0x6a4/0x870 [btrfs]
  [66.555718]  ? kvm_sched_clock_read+0x18/0x40
  [66.575758]  open_ctree+0xb32/0x1734 [btrfs]
  [66.595272]  ? bdi_register_va+0x1b/0x20
  [66.614638]  ? super_setup_bdi_name+0x79/0xd0
  [66.633809]  btrfs_mount_root.cold+0x12/0xeb [btrfs]
  [66.652938]  ? __kmalloc_track_caller+0x217/0x3b0
  [66.671925]  legacy_get_tree+0x34/0x60
  [66.690300]  vfs_get_tree+0x2d/0xc0
  [66.708221]  vfs_kern_mount.part.0+0x78/0xc0
  [66.725808]  vfs_kern_mount+0x13/0x20
  [66.742730]  btrfs_mount+0x11f/0x3c0 [btrfs]
  [66.759350]  ? kfree+0x5ff/0x670
  [66.775441]  ? __kmalloc_track_caller+0x217/0x3b0
  [66.791750]  legacy_get_tree+0x34/0x60
  [66.807494]  vfs_get_tree+0x2d/0xc0
  [66.823349]  path_mount+0x48c/0xd30
  [66.838753]  __x64_sys_mount+0x108/0x140
  [66.854412]  do_syscall_64+0x38/0x50
  [66.869673]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [66.885093] RIP: 0033:0x7f0138827f6e
  [66.945613] RSP: 002b:00007ffecd79edf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
  [66.977214] RAX: ffffffffffffffda RBX: 00007f013894c264 RCX: 00007f0138827f6e
  [66.994266] RDX: 00005593a4a41360 RSI: 00005593a4a33690 RDI: 00005593a4a3a6c0
  [67.011544] RBP: 00005593a4a33440 R08: 0000000000000000 R09: 0000000000000001
  [67.028836] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
  [67.045812] R13: 00005593a4a3a6c0 R14: 00005593a4a41360 R15: 00005593a4a33440
  [67.216138] ---[ end trace e114b111db64298c ]---
  [67.237089] RIP: 0010:extent_io_tree_panic.isra.0+0x23/0x25 [btrfs]
  [67.325317] RSP: 0018:ffff93e5414c3948 EFLAGS: 00010246
  [67.347946] RAX: 0000000000000000 RBX: 0000000001bfffff RCX: 0000000000000000
  [67.371343] RDX: 0000000000000000 RSI: ffffffffb90d4660 RDI: 00000000ffffffff
  [67.394757] RBP: ffff93e5414c3948 R08: 0000000000000001 R09: 0000000000000001
  [67.418409] R10: ffff93e5414c3658 R11: 0000000000000000 R12: ffff8ec782d728c0
  [67.441906] R13: ffff8ec78bc71628 R14: ffff8ec782d72aa0 R15: 0000000002400000
  [67.465436] FS:  00007f01386a8580(0000) GS:ffff8ec809000000(0000) knlGS:0000000000000000
  [67.511660] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [67.535047] CR2: 00007f01382fa000 CR3: 0000000109a34000 CR4: 0000000000750ee0
  [67.558449] PKRU: 55555554
  [67.581146] note: mount[613] exited with preempt_count 2

The image has a chunk item which has a logical start 37748736 and length
18446744073701163008 (-8M). The calculated end 29360127 overflows.
EEXIST was caught by insert_state() because of the duplicate end and
extent_io_tree_panic() was called.

Add overflow check of chunk item end to tree checker so it can be
detected early at mount time.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=208929
CC: stable@vger.kernel.org # 4.19+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Su Yue <l@damenly.su>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2021-01-07 17:25:05 +01:00
arch USB fixes for 5.10-rc7 2020-12-06 11:38:36 -08:00
block block-5.10-2020-12-05 2020-12-05 14:45:30 -08:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto drivers-5.10-2020-10-12 2020-10-13 13:04:41 -07:00
Documentation Networking fixes for 5.10-rc7, including fixes from bpf, netfilter, 2020-12-03 13:10:11 -08:00
drivers Char/Misc driver fixes for 5.10-rc7 2020-12-06 11:48:17 -08:00
fs btrfs: tree-checker: check if chunk item end overflows 2021-01-07 17:25:05 +01:00
include btrfs: calculate inline extent buffer page size based on page size 2020-12-09 19:16:10 +01:00
init Kbuild fixes for v5.10 (2nd) 2020-12-06 10:31:39 -08:00
ipc ipc: adjust proc_ipc_sem_dointvec definition to match prototype 2020-09-05 12:14:29 -07:00
kernel A set of updates for the interrupt subsystem: 2020-12-06 11:15:55 -08:00
lib zlib: export S390 symbols for zlib modules 2020-12-06 10:19:07 -08:00
LICENSES LICENSES/deprecated: add Zlib license text 2020-09-16 14:33:49 +02:00
mm mm/mmap.c: fix mmap return value when vma is merged after call_mmap() 2020-12-06 10:19:07 -08:00
net net/sched: act_mpls: ensure LSE is pullable before reading it 2020-12-03 11:13:37 -08:00
samples Tracing fixes for 5.10-rc6 2020-12-01 15:30:18 -08:00
scripts Kbuild fixes for v5.10 (2nd) 2020-12-06 10:31:39 -08:00
security selinux/stable-5.10 PR 20201113 2020-11-14 12:04:02 -08:00
sound ALSA: hda/realtek: Add mute LED quirk to yet another HP x360 model 2020-11-28 10:00:51 +01:00
tools A set of fixes for x86: 2020-12-06 11:22:39 -08:00
usr Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
virt kvm: x86/mmu: Support dirty logging for the TDP MMU 2020-10-23 03:42:13 -04:00
.clang-format RDMA 5.10 pull request 2020-10-17 11:18:18 -07:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: docs: ignore sphinx_*/ directories 2020-09-10 10:44:31 -06:00
.mailmap mailmap: add two more addresses of Uwe Kleine-König 2020-12-06 10:19:07 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Jason Cooper to CREDITS 2020-11-30 10:20:34 +01:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS A set of updates for the interrupt subsystem: 2020-12-06 11:15:55 -08:00
Makefile Linux 5.10-rc7 2020-12-06 14:25:12 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.