CVE-2021-47599— btrfs: use latest_dev in btrfs_show_devname
Affected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 4faf55b03823e96c44dc4e364520000ed3b12fdb< e342c2558016ead462f376b6c6c2ac5efc17f3b1 | affected |
4faf55b03823e96c44dc4e364520000ed3b12fdb< 6605fd2f394bba0a0059df2b6cfc87b0b6d393a2 | affected | ||
fa511954694cbea4d0cb59c81c8670276920c08c | affected | ||
3d3452920cacc3a46444ecca26af5d181410ff19 | affected | ||
ca21728e18d34fd5f449bb0581160e0eaee498a6 | affected | ||
1c986b7e8c1bf8fabbc294036b003286cc3a8c7e | affected | ||
5.9 | affected | ||
< 5.9 | unaffected | ||
| … +2 more rows | |||
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I. Basic Information for CVE-2021-47599
Vulnerability Information
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Vulnerability Title
btrfs: use latest_dev in btrfs_show_devname
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: use latest_dev in btrfs_show_devname The test case btrfs/238 reports the warning below: WARNING: CPU: 3 PID: 481 at fs/btrfs/super.c:2509 btrfs_show_devname+0x104/0x1e8 [btrfs] CPU: 2 PID: 1 Comm: systemd Tainted: G W O 5.14.0-rc1-custom #72 Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 Call trace: btrfs_show_devname+0x108/0x1b4 [btrfs] show_mountinfo+0x234/0x2c4 m_show+0x28/0x34 seq_read_iter+0x12c/0x3c4 vfs_read+0x29c/0x2c8 ksys_read+0x80/0xec __arm64_sys_read+0x28/0x34 invoke_syscall+0x50/0xf8 do_el0_svc+0x88/0x138 el0_svc+0x2c/0x8c el0t_64_sync_handler+0x84/0xe4 el0t_64_sync+0x198/0x19c Reason: While btrfs_prepare_sprout() moves the fs_devices::devices into fs_devices::seed_list, the btrfs_show_devname() searches for the devices and found none, leading to the warning as in above. Fix: latest_dev is updated according to the changes to the device list. That means we could use the latest_dev->name to show the device name in /proc/self/mounts, the pointer will be always valid as it's assigned before the device is deleted from the list in remove or replace. The RCU protection is sufficient as the device structure is freed after synchronization.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于设备结构在同步后被释放。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-47599
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Same Patch Batch · Linux · 2024-06-19 · 122 CVEs total
| CVE-2024-38612 | ipv6: sr: fix invalid unregister error path | |
| CVE-2021-47584 | iocost: Fix divide-by-zero on donation from low hweight cgroup | |
| CVE-2021-47582 | USB: core: Make do_proc_control() and do_proc_bulk() killable | |
| CVE-2021-47583 | media: mxl111sf: change mutex_init() location | |
| CVE-2021-47579 | ovl: fix warning in ovl_create_real() | |
| CVE-2021-47580 | scsi: scsi_debug: Fix type in min_t to avoid stack OOB | |
| CVE-2021-47578 | scsi: scsi_debug: Don't call kcalloc() if size arg is zero | |
| CVE-2021-47576 | scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select() | |
| CVE-2021-47577 | io-wq: check for wq exit after adding new worker task_work | |
| CVE-2024-38617 | kunit/fortify: Fix mismatched kvalloc()/vfree() usage | |
| CVE-2024-38618 | ALSA: timer: Set lower bound of start tick time | |
| CVE-2024-38616 | wifi: carl9170: re-fix fortified-memset warning | |
| CVE-2024-38615 | cpufreq: exit() callback is optional | |
| CVE-2024-38614 | openrisc: traps: Don't send signals to kernel mode threads | |
| CVE-2024-38613 | m68k: Fix spinlock race in kernel thread creation | |
| CVE-2024-38611 | media: i2c: et8ek8: Don't strip remove function when driver is builtin | |
| CVE-2024-38603 | drivers/perf: hisi: hns3: Actually use devm_add_action_or_reset() | |
| CVE-2024-38601 | ring-buffer: Fix a race between readers and resize checks | |
| CVE-2024-38600 | ALSA: Fix deadlocks with kctl removals at disconnection | |
| CVE-2024-38602 | ax25: Fix reference count leak issues of ax25_dev |
Showing top 20 of 122 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
Same vendor: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
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