Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:dm-bufio: fix sched in atomic contextIf "try_verify_in_tasklet" is set for dm-verity, DM_BUFIO_CLIENT_NO_SLEEPis enabled for dm-bufio. However, when bufio tries to evict buffers, thereis a chance to trigger scheduling in spin_lock_bh, the following warningis hit:BUG: sleeping function called from invalid context at drivers/md/dm-bufio.c:2745in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 123, name: kworker/2:2preempt_count: 201, expected: 0RCU nest depth: 0, expected: 04 locks held by kworker/2:2/123: #0: ffff88800a2d1548 ((wq_completion)dm_bufio_cache){....}-{0:0}, at: process_one_work+0xe46/0x1970 #1: ffffc90000d97d20 ((work_completion)(&dm_bufio_replacement_work)){....}-{0:0}, at: process_one_work+0x763/0x1970 #2: ffffffff8555b528 (dm_bufio_clients_lock){....}-{3:3}, at: do_global_cleanup+0x1ce/0x710 #3: ffff88801d5820b8 (&c->spinlock){....}-{2:2}, at: do_global_cleanup+0x2a5/0x710Preemption disabled at:[<0000000000000000>] 0x0CPU: 2 UID: 0 PID: 123 Comm: kworker/2:2 Not tainted 6.16.0-rc3-g90548c634bd0 #305 PREEMPT(voluntary)Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014Workqueue: dm_bufio_cache do_global_cleanupCall Trace:
No PoCs from references.
- https://github.com/w4zu/Debian_security