Re: [syzbot] Re: [syzbot] [acpi?] [nvdimm?] KASAN: vmalloc-out-of-bounds Read in acpi_nfit_ctl (2)

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Subject: Re: [syzbot] [acpi?] [nvdimm?] KASAN: vmalloc-out-of-bounds Read in acpi_nfit_ctl (2)
Author: surajsonawane0215@gmail.com

#syz test

On Tue, Nov 5, 2024 at 8:58 PM syzbot <
syzbot+7534f060ebda6b8b51b3@syzkaller.appspotmail.com> wrote:

> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    2e1b3cc9d7f7 Merge tag 'arm-fixes-6.12-2' of
> git://git.ker..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=12418e30580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=11254d3590b16717
> dashboard link:
> https://syzkaller.appspot.com/bug?extid=7534f060ebda6b8b51b3
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for
> Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12170f40580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16418e30580000
>
> Downloadable assets:
> disk image (non-bootable):
> https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-2e1b3cc9.raw.xz
> vmlinux:
> https://storage.googleapis.com/syzbot-assets/2f2588b04ae9/vmlinux-2e1b3cc9.xz
> kernel image:
> https://storage.googleapis.com/syzbot-assets/2c9324cf16df/bzImage-2e1b3cc9.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the
> commit:
> Reported-by: syzbot+7534f060ebda6b8b51b3@syzkaller.appspotmail.com
>
> ==================================================================
> BUG: KASAN: vmalloc-out-of-bounds in cmd_to_func
> drivers/acpi/nfit/core.c:416 [inline]
> BUG: KASAN: vmalloc-out-of-bounds in acpi_nfit_ctl+0x20e8/0x24a0
> drivers/acpi/nfit/core.c:459
> Read of size 4 at addr ffffc90000e0e038 by task syz-executor229/5316
>
> CPU: 0 UID: 0 PID: 5316 Comm: syz-executor229 Not tainted
> 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
> 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
> Call Trace:
>  <TASK>
>  __dump_stack lib/dump_stack.c:94 [inline]
>  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
>  print_address_description mm/kasan/report.c:377 [inline]
>  print_report+0x169/0x550 mm/kasan/report.c:488
>  kasan_report+0x143/0x180 mm/kasan/report.c:601
>  cmd_to_func drivers/acpi/nfit/core.c:416 [inline]
>  acpi_nfit_ctl+0x20e8/0x24a0 drivers/acpi/nfit/core.c:459
>  __nd_ioctl drivers/nvdimm/bus.c:1186 [inline]
>  nd_ioctl+0x1844/0x1fd0 drivers/nvdimm/bus.c:1264
>  vfs_ioctl fs/ioctl.c:51 [inline]
>  __do_sys_ioctl fs/ioctl.c:907 [inline]
>  __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
>  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
>  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7fb399ccda79
> Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7
> 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
> ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007ffcf6cb8d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb399ccda79
> RDX: 0000000020000180 RSI: 00000000c008640a RDI: 0000000000000003
> RBP: 00007fb399d405f0 R08: 0000000000000006 R09: 0000000000000006
> R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000001
> R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
>  </TASK>
>
> The buggy address belongs to the virtual mapping at
>  [ffffc90000e0e000, ffffc90000e10000) created by:
>  __nd_ioctl drivers/nvdimm/bus.c:1169 [inline]
>  nd_ioctl+0x1594/0x1fd0 drivers/nvdimm/bus.c:1264
>
> The buggy address belongs to the physical page:
> page: refcount:1 mapcount:0 mapping:0000000000000000
> index:0xffff8880401b9a80 pfn:0x401b9
> flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
> raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000
> raw: ffff8880401b9a80 0000000000000000 00000001ffffffff 0000000000000000
> page dumped because: kasan: bad access detected
> page_owner tracks the page as allocated
> page last allocated via order 0, migratetype Unmovable, gfp_mask
> 0x2cc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN), pid 5316, tgid 5316
> (syz-executor229), ts 69039468240, free_ts 68666765389
>  set_page_owner include/linux/page_owner.h:32 [inline]
>  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
>  prep_new_page mm/page_alloc.c:1545 [inline]
>  get_page_from_freelist+0x303f/0x3190 mm/page_alloc.c:3457
>  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733
>  alloc_pages_bulk_noprof+0x729/0xd40 mm/page_alloc.c:4681
>  alloc_pages_bulk_array_mempolicy_noprof+0x8ea/0x1600 mm/mempolicy.c:2556
>  vm_area_alloc_pages mm/vmalloc.c:3542 [inline]
>  __vmalloc_area_node mm/vmalloc.c:3646 [inline]
>  __vmalloc_node_range_noprof+0x752/0x13f0 mm/vmalloc.c:3828
>  __vmalloc_node_noprof mm/vmalloc.c:3893 [inline]
>  vmalloc_noprof+0x79/0x90 mm/vmalloc.c:3926
>  __nd_ioctl drivers/nvdimm/bus.c:1169 [inline]
>  nd_ioctl+0x1594/0x1fd0 drivers/nvdimm/bus.c:1264
>  vfs_ioctl fs/ioctl.c:51 [inline]
>  __do_sys_ioctl fs/ioctl.c:907 [inline]
>  __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
>  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
>  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> page last free pid 5312 tgid 5312 stack trace:
>  reset_page_owner include/linux/page_owner.h:25 [inline]
>  free_pages_prepare mm/page_alloc.c:1108 [inline]
>  free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638
>  __folio_put+0x2c7/0x440 mm/swap.c:126
>  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
>  pipe_update_tail fs/pipe.c:224 [inline]
>  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
>  new_sync_read fs/read_write.c:488 [inline]
>  vfs_read+0x991/0xb70 fs/read_write.c:569
>  ksys_read+0x183/0x2b0 fs/read_write.c:712
>  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
>  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Memory state around the buggy address:
>  ffffc90000e0df00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>  ffffc90000e0df80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
> >ffffc90000e0e000: 00 00 00 00 00 00 00 03 f8 f8 f8 f8 f8 f8 f8 f8
>                                         ^
>  ffffc90000e0e080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>  ffffc90000e0e100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
> ==================================================================
>
>
> ---
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