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commit9eb78c2532upstream. The table for Unicode upcase conversion requires an order-5 allocation, which may fail on a highly-fragmented system: pool-udisksd: page allocation failure: order:5, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null), cpuset=/,mems_allowed=0 CPU: 4 PID: 3756880 Comm: pool-udisksd Tainted: G U 5.8.10-200.fc32.x86_64 #1 Hardware name: Dell Inc. XPS 13 9360/0PVG6D, BIOS 2.13.0 11/14/2019 Call Trace: dump_stack+0x6b/0x88 warn_alloc.cold+0x75/0xd9 ? _cond_resched+0x16/0x40 ? __alloc_pages_direct_compact+0x144/0x150 __alloc_pages_slowpath.constprop.0+0xcfa/0xd30 ? __schedule+0x28a/0x840 ? __wait_on_bit_lock+0x92/0xa0 __alloc_pages_nodemask+0x2df/0x320 kmalloc_order+0x1b/0x80 kmalloc_order_trace+0x1d/0xa0 exfat_create_upcase_table+0x115/0x390 [exfat] exfat_fill_super+0x3ef/0x7f0 [exfat] ? sget_fc+0x1d0/0x240 ? exfat_init_fs_context+0x120/0x120 [exfat] get_tree_bdev+0x15c/0x250 vfs_get_tree+0x25/0xb0 do_mount+0x7c3/0xaf0 ? copy_mount_options+0xab/0x180 __x64_sys_mount+0x8e/0xd0 do_syscall_64+0x4d/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Make the driver use kvcalloc() to eliminate the issue. Fixes:370e812b3e("exfat: add nls operations") Cc: stable@vger.kernel.org #v5.7+ Signed-off-by: Artem Labazov <123321artyom@gmail.com> Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.