CVE-2024-26681

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netdevsim: avoid potential loop in nsim_dev_trap_report_work()<br /> <br /> Many syzbot reports include the following trace [1]<br /> <br /> If nsim_dev_trap_report_work() can not grab the mutex,<br /> it should rearm itself at least one jiffie later.<br /> <br /> [1]<br /> Sending NMI from CPU 1 to CPUs 0:<br /> NMI backtrace for cpu 0<br /> CPU: 0 PID: 32383 Comm: kworker/0:2 Not tainted 6.8.0-rc2-syzkaller-00031-g861c0981648f #0<br /> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023<br /> Workqueue: events nsim_dev_trap_report_work<br /> RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:89 [inline]<br /> RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]<br /> RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]<br /> RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]<br /> RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]<br /> RIP: 0010:kasan_check_range+0x101/0x190 mm/kasan/generic.c:189<br /> Code: 07 49 39 d1 75 0a 45 3a 11 b8 01 00 00 00 7c 0b 44 89 c2 e8 21 ed ff ff 83 f0 01 5b 5d 41 5c c3 48 85 d2 74 4f 48 01 ea eb 09 83 c0 01 48 39 d0 74 41 80 38 00 74 f2 eb b6 41 bc 08 00 00 00<br /> RSP: 0018:ffffc90012dcf998 EFLAGS: 00000046<br /> RAX: fffffbfff258af1e RBX: fffffbfff258af1f RCX: ffffffff8168eda3<br /> RDX: fffffbfff258af1f RSI: 0000000000000004 RDI: ffffffff92c578f0<br /> RBP: fffffbfff258af1e R08: 0000000000000000 R09: fffffbfff258af1e<br /> R10: ffffffff92c578f3 R11: ffffffff8acbcbc0 R12: 0000000000000002<br /> R13: ffff88806db38400 R14: 1ffff920025b9f42 R15: ffffffff92c578e8<br /> FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: 000000c00994e078 CR3: 000000002c250000 CR4: 00000000003506f0<br /> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000<br /> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400<br /> Call Trace:<br /> <br /> <br /> <br /> instrument_atomic_read include/linux/instrumented.h:68 [inline]<br /> atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]<br /> queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline]<br /> debug_spin_unlock kernel/locking/spinlock_debug.c:101 [inline]<br /> do_raw_spin_unlock+0x53/0x230 kernel/locking/spinlock_debug.c:141<br /> __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline]<br /> _raw_spin_unlock_irqrestore+0x22/0x70 kernel/locking/spinlock.c:194<br /> debug_object_activate+0x349/0x540 lib/debugobjects.c:726<br /> debug_work_activate kernel/workqueue.c:578 [inline]<br /> insert_work+0x30/0x230 kernel/workqueue.c:1650<br /> __queue_work+0x62e/0x11d0 kernel/workqueue.c:1802<br /> __queue_delayed_work+0x1bf/0x270 kernel/workqueue.c:1953<br /> queue_delayed_work_on+0x106/0x130 kernel/workqueue.c:1989<br /> queue_delayed_work include/linux/workqueue.h:563 [inline]<br /> schedule_delayed_work include/linux/workqueue.h:677 [inline]<br /> nsim_dev_trap_report_work+0x9c0/0xc80 drivers/net/netdevsim/dev.c:842<br /> process_one_work+0x886/0x15d0 kernel/workqueue.c:2633<br /> process_scheduled_works kernel/workqueue.c:2706 [inline]<br /> worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787<br /> kthread+0x2c6/0x3a0 kernel/kthread.c:388<br /> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147<br /> ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242<br />