DEBIAN-CVE-2022-50715

In the Linux kernel, the following vulnerability has been resolved: md/raid1: stop mdxraid1 thread when raid1 array run failed fail run raid1 array when we assemble array with the inactive disk only, but the mdxraid1 thread were not stop, Even if the associated resources have been released. it will caused a NULL dereference when we do poweroff. This causes the following Oops: [ 287.587787] BUG: kernel NULL pointer dereference, address: 0000000000000070 [ 287.594762] #PF: supervisor read access in kernel mode [ 287.599912] #PF: errorcode(0x0000) - not-present page [ 287.605061] PGD 0 P4D 0 [ 287.607612] Oops: 0000 [#1] SMP NOPTI [ 287.611287] CPU: 3 PID: 5265 Comm: md0raid1 Tainted: G U 5.10.146 #0 [ 287.619029] Hardware name: xxxxxxx/To be filled by O.E.M, BIOS 5.19 06/16/2022 [ 287.626775] RIP: 0010:mdcheckrecovery+0x57/0x500 [mdmod] [ 287.632357] Code: fe 01 00 00 48 83 bb 10 03 00 00 00 74 08 48 89 ...... [ 287.651118] RSP: 0018:ffffc90000433d78 EFLAGS: 00010202 [ 287.656347] RAX: 0000000000000000 RBX: ffff888105986800 RCX: 0000000000000000 [ 287.663491] RDX: ffffc90000433bb0 RSI: 00000000ffffefff RDI: ffff888105986800 [ 287.670634] RBP: ffffc90000433da0 R08: 0000000000000000 R09: c0000000ffffefff [ 287.677771] R10: 0000000000000001 R11: ffffc90000433ba8 R12: ffff888105986800 [ 287.684907] R13: 0000000000000000 R14: fffffffffffffe00 R15: ffff888100b6b500 [ 287.692052] FS: 0000000000000000(0000) GS:ffff888277f80000(0000) knlGS:0000000000000000 [ 287.700149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.705897] CR2: 0000000000000070 CR3: 000000000320a000 CR4: 0000000000350ee0 [ 287.713033] Call Trace: [ 287.715498] raid1d+0x6c/0xbbb [raid1] [ 287.719256] ? _schedule+0x1ff/0x760 [ 287.722930] ? schedule+0x3b/0xb0 [ 287.726260] ? scheduletimeout+0x1ed/0x290 [ 287.730456] ? _switchto+0x11f/0x400 [ 287.734219] mdthread+0xe9/0x140 [mdmod] [ 287.738328] ? mdthread+0xe9/0x140 [mdmod] [ 287.742601] ? waitwoken+0x80/0x80 [ 287.746097] ? mdregisterthread+0xe0/0xe0 [mdmod] [ 287.751064] kthread+0x11a/0x140 [ 287.754300] ? kthreadpark+0x90/0x90 [ 287.757974] retfromfork+0x1f/0x30 In fact, when raid1 array run fail, we need to do mdunregisterthread() before raid1_free().