CVE-2022-48857

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> NFC: port100: fix use-after-free in port100_send_complete<br /> <br /> Syzbot reported UAF in port100_send_complete(). The root case is in<br /> missing usb_kill_urb() calls on error handling path of -&gt;probe function.<br /> <br /> port100_send_complete() accesses devm allocated memory which will be<br /> freed on probe failure. We should kill this urbs before returning an<br /> error from probe function to prevent reported use-after-free<br /> <br /> Fail log:<br /> <br /> BUG: KASAN: use-after-free in port100_send_complete+0x16e/0x1a0 drivers/nfc/port100.c:935<br /> Read of size 1 at addr ffff88801bb59540 by task ksoftirqd/2/26<br /> ...<br /> Call Trace:<br /> <br /> __dump_stack lib/dump_stack.c:88 [inline]<br /> dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106<br /> print_address_description.constprop.0.cold+0x8d/0x303 mm/kasan/report.c:255<br /> __kasan_report mm/kasan/report.c:442 [inline]<br /> kasan_report.cold+0x83/0xdf mm/kasan/report.c:459<br /> port100_send_complete+0x16e/0x1a0 drivers/nfc/port100.c:935<br /> __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1670<br /> <br /> ...<br /> <br /> Allocated by task 1255:<br /> kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38<br /> kasan_set_track mm/kasan/common.c:45 [inline]<br /> set_alloc_info mm/kasan/common.c:436 [inline]<br /> ____kasan_kmalloc mm/kasan/common.c:515 [inline]<br /> ____kasan_kmalloc mm/kasan/common.c:474 [inline]<br /> __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:524<br /> alloc_dr drivers/base/devres.c:116 [inline]<br /> devm_kmalloc+0x96/0x1d0 drivers/base/devres.c:823<br /> devm_kzalloc include/linux/device.h:209 [inline]<br /> port100_probe+0x8a/0x1320 drivers/nfc/port100.c:1502<br /> <br /> Freed by task 1255:<br /> kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38<br /> kasan_set_track+0x21/0x30 mm/kasan/common.c:45<br /> kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370<br /> ____kasan_slab_free mm/kasan/common.c:366 [inline]<br /> ____kasan_slab_free+0xff/0x140 mm/kasan/common.c:328<br /> kasan_slab_free include/linux/kasan.h:236 [inline]<br /> __cache_free mm/slab.c:3437 [inline]<br /> kfree+0xf8/0x2b0 mm/slab.c:3794<br /> release_nodes+0x112/0x1a0 drivers/base/devres.c:501<br /> devres_release_all+0x114/0x190 drivers/base/devres.c:530<br /> really_probe+0x626/0xcc0 drivers/base/dd.c:670