[syzbot] memory leak in vma_node_allow

Mon Feb 13 00:25:50 UTC 2023

Hello,

syzbot found the following issue on:

HEAD commit:    0983f6bf2bfc Merge tag 'devicetree-fixes-for-6.2-2' of git..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=134dab4d480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=9e55e71813900595
dashboard link: https://syzkaller.appspot.com/bug?extid=58ea3177ba8bd0a5d8ee
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15052a83480000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13073cfb480000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/dfe2e2ac7b39/disk-0983f6bf.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/bd09e355e210/vmlinux-0983f6bf.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8409e5f10fab/bzImage-0983f6bf.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+58ea3177ba8bd0a5d8ee at syzkaller.appspotmail.com

Warning: Permanently added '10.128.1.168' (ECDSA) to the list of known hosts.
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88810f1c75c0 (size 64):
  comm "syz-executor750", pid 5060, jiffies 4294945258 (age 13.860s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 d6 e4 04 81 88 ff ff  ................
  backtrace:
    [<ffffffff81508f84>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1062
    [<ffffffff82787cca>] kmalloc include/linux/slab.h:580 [inline]
    [<ffffffff82787cca>] vma_node_allow+0x3a/0x150 drivers/gpu/drm/drm_vma_manager.c:255
    [<ffffffff8276788e>] drm_gem_handle_create_tail+0x10e/0x250 drivers/gpu/drm/drm_gem.c:377
    [<ffffffff8278ed4d>] drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:432 [inline]
    [<ffffffff8278ed4d>] drm_gem_shmem_dumb_create+0xbd/0x200 drivers/gpu/drm/drm_gem_shmem_helper.c:534
    [<ffffffff82753a5b>] drm_mode_create_dumb+0x11b/0x150 drivers/gpu/drm/drm_dumb_buffers.c:96
    [<ffffffff82768e28>] drm_ioctl_kernel+0x148/0x260 drivers/gpu/drm/drm_ioctl.c:788
    [<ffffffff82769230>] drm_ioctl+0x2f0/0x500 drivers/gpu/drm/drm_ioctl.c:891
    [<ffffffff81642600>] vfs_ioctl fs/ioctl.c:51 [inline]
    [<ffffffff81642600>] __do_sys_ioctl fs/ioctl.c:870 [inline]
    [<ffffffff81642600>] __se_sys_ioctl fs/ioctl.c:856 [inline]
    [<ffffffff81642600>] __x64_sys_ioctl+0x100/0x140 fs/ioctl.c:856
    [<ffffffff8498c889>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff8498c889>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84a0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888109662d80 (size 64):
  comm "syz-executor750", pid 5060, jiffies 4294945258 (age 13.870s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 d6 e4 04 81 88 ff ff  ................
  backtrace:
    [<ffffffff81508f84>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1062
    [<ffffffff82787cca>] kmalloc include/linux/slab.h:580 [inline]
    [<ffffffff82787cca>] vma_node_allow+0x3a/0x150 drivers/gpu/drm/drm_vma_manager.c:255
    [<ffffffff8276788e>] drm_gem_handle_create_tail+0x10e/0x250 drivers/gpu/drm/drm_gem.c:377
    [<ffffffff8278ed4d>] drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:432 [inline]
    [<ffffffff8278ed4d>] drm_gem_shmem_dumb_create+0xbd/0x200 drivers/gpu/drm/drm_gem_shmem_helper.c:534
    [<ffffffff82753a5b>] drm_mode_create_dumb+0x11b/0x150 drivers/gpu/drm/drm_dumb_buffers.c:96
    [<ffffffff82768e28>] drm_ioctl_kernel+0x148/0x260 drivers/gpu/drm/drm_ioctl.c:788
    [<ffffffff82769230>] drm_ioctl+0x2f0/0x500 drivers/gpu/drm/drm_ioctl.c:891
    [<ffffffff81642600>] vfs_ioctl fs/ioctl.c:51 [inline]
    [<ffffffff81642600>] __do_sys_ioctl fs/ioctl.c:870 [inline]
    [<ffffffff81642600>] __se_sys_ioctl fs/ioctl.c:856 [inline]
    [<ffffffff81642600>] __x64_sys_ioctl+0x100/0x140 fs/ioctl.c:856
    [<ffffffff8498c889>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff8498c889>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84a0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888109662900 (size 64):
  comm "syz-executor750", pid 5069, jiffies 4294945834 (age 8.110s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 ce 8f 09 81 88 ff ff  ................
  backtrace:
    [<ffffffff81508f84>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1062
    [<ffffffff82787cca>] kmalloc include/linux/slab.h:580 [inline]
    [<ffffffff82787cca>] vma_node_allow+0x3a/0x150 drivers/gpu/drm/drm_vma_manager.c:255
    [<ffffffff8276788e>] drm_gem_handle_create_tail+0x10e/0x250 drivers/gpu/drm/drm_gem.c:377
    [<ffffffff8278ed4d>] drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:432 [inline]
    [<ffffffff8278ed4d>] drm_gem_shmem_dumb_create+0xbd/0x200 drivers/gpu/drm/drm_gem_shmem_helper.c:534
    [<ffffffff82753a5b>] drm_mode_create_dumb+0x11b/0x150 drivers/gpu/drm/drm_dumb_buffers.c:96
    [<ffffffff82768e28>] drm_ioctl_kernel+0x148/0x260 drivers/gpu/drm/drm_ioctl.c:788
    [<ffffffff82769230>] drm_ioctl+0x2f0/0x500 drivers/gpu/drm/drm_ioctl.c:891
    [<ffffffff81642600>] vfs_ioctl fs/ioctl.c:51 [inline]
    [<ffffffff81642600>] __do_sys_ioctl fs/ioctl.c:870 [inline]
    [<ffffffff81642600>] __se_sys_ioctl fs/ioctl.c:856 [inline]
    [<ffffffff81642600>] __x64_sys_ioctl+0x100/0x140 fs/ioctl.c:856
    [<ffffffff8498c889>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff8498c889>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84a0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888109662940 (size 64):
  comm "syz-executor750", pid 5069, jiffies 4294945834 (age 8.110s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 ce 8f 09 81 88 ff ff  ................
  backtrace:
    [<ffffffff81508f84>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1062
    [<ffffffff82787cca>] kmalloc include/linux/slab.h:580 [inline]
    [<ffffffff82787cca>] vma_node_allow+0x3a/0x150 drivers/gpu/drm/drm_vma_manager.c:255
    [<ffffffff8276788e>] drm_gem_handle_create_tail+0x10e/0x250 drivers/gpu/drm/drm_gem.c:377
    [<ffffffff8278ed4d>] drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:432 [inline]
    [<ffffffff8278ed4d>] drm_gem_shmem_dumb_create+0xbd/0x200 drivers/gpu/drm/drm_gem_shmem_helper.c:534
    [<ffffffff82753a5b>] drm_mode_create_dumb+0x11b/0x150 drivers/gpu/drm/drm_dumb_buffers.c:96
    [<ffffffff82768e28>] drm_ioctl_kernel+0x148/0x260 drivers/gpu/drm/drm_ioctl.c:788
    [<ffffffff82769230>] drm_ioctl+0x2f0/0x500 drivers/gpu/drm/drm_ioctl.c:891
    [<ffffffff81642600>] vfs_ioctl fs/ioctl.c:51 [inline]
    [<ffffffff81642600>] __do_sys_ioctl fs/ioctl.c:870 [inline]
    [<ffffffff81642600>] __se_sys_ioctl fs/ioctl.c:856 [inline]
    [<ffffffff81642600>] __x64_sys_ioctl+0x100/0x140 fs/ioctl.c:856
    [<ffffffff8498c889>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff8498c889>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84a0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller at googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches