CVE-2022-49148

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> watch_queue: Free the page array when watch_queue is dismantled<br /> <br /> Commit 7ea1a0124b6d ("watch_queue: Free the alloc bitmap when the<br /> watch_queue is torn down") took care of the bitmap, but not the page<br /> array.<br /> <br /> BUG: memory leak<br /> unreferenced object 0xffff88810d9bc140 (size 32):<br /> comm "syz-executor335", pid 3603, jiffies 4294946994 (age 12.840s)<br /> hex dump (first 32 bytes):<br /> 40 a7 40 04 00 ea ff ff 00 00 00 00 00 00 00 00 @.@.............<br /> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................<br /> backtrace:<br /> kmalloc_array include/linux/slab.h:621 [inline]<br /> kcalloc include/linux/slab.h:652 [inline]<br /> watch_queue_set_size+0x12f/0x2e0 kernel/watch_queue.c:251<br /> pipe_ioctl+0x82/0x140 fs/pipe.c:632<br /> vfs_ioctl fs/ioctl.c:51 [inline]<br /> __do_sys_ioctl fs/ioctl.c:874 [inline]<br /> __se_sys_ioctl fs/ioctl.c:860 [inline]<br /> __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860<br /> do_syscall_x64 arch/x86/entry/common.c:50 [inline]