CVE-2022-49033: btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit()

First published: Mon Oct 21 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit() Syzkaller reported BUG as follows: BUG: sleeping function called from invalid context at include/linux/sched/mm.h:274 Call Trace: <TASK> dump_stack_lvl+0xcd/0x134 __might_resched.cold+0x222/0x26b kmem_cache_alloc+0x2e7/0x3c0 update_qgroup_limit_item+0xe1/0x390 btrfs_qgroup_inherit+0x147b/0x1ee0 create_subvol+0x4eb/0x1710 btrfs_mksubvol+0xfe5/0x13f0 __btrfs_ioctl_snap_create+0x2b0/0x430 btrfs_ioctl_snap_create_v2+0x25a/0x520 btrfs_ioctl+0x2a1c/0x5ce0 __x64_sys_ioctl+0x193/0x200 do_syscall_64+0x35/0x80 Fix this by calling qgroup_dirty() on @dstqgroup, and update limit item in btrfs_run_qgroups() later outside of the spinlock context.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/title
• agent/references
• agent/type
• agent/description
• agent/first-publish-date
• agent/author
• agent/event
• collector/mitre-cve
• source/MITRE
• collector/nvd-api
• source/NVD
• agent/software-canonical-lookup
• agent/remedy
• agent/severity
• agent/softwarecombine
• agent/tags
• agent/last-modified-date
• vendor/linux
• canonical/linux linux kernel
• version/linux linux kernel/4.15
• version/linux linux kernel/4.20
• version/linux linux kernel/5.5
• version/linux linux kernel/5.11
• version/linux linux kernel/5.16
• version/linux linux kernel/6.1-rc1
• version/linux linux kernel/6.1-rc2
• version/linux linux kernel/6.1-rc3
• version/linux linux kernel/6.1-rc4
• version/linux linux kernel/6.1-rc5
• version/linux linux kernel/6.1-rc6