Global infos:

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: 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.

CVE Status: Analyzed

References:

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

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

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

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

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

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

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

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

Metrics:

Attribute	Value
Attack Complexity	LOW
Attack Vector	LOCAL
Availability Impact	HIGH
Base Score	5.5
Base Severity	MEDIUM
Confidentiality Impact	NONE
Integrity Impact	NONE
Privileges Required	LOW
Scope	UNCHANGED
User Interaction	NONE
Vector String	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability Score	1.8
Impact Score	3.6
Source	[email protected]
Type	Primary

Links:

Exploit-db
Github