Hello,
syzbot found the following issue on:
HEAD commit: 1d18101a644e Merge tag 'kernel-6.19-rc1.cred' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13fba192580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a1db0fea040c2a9f dashboard link: https://syzkaller.appspot.com/bug?extid=4317d7108e14e5d56308 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1055e2b4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ddf484580000
Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-... vmlinux: https://storage.googleapis.com/syzbot-assets/98f78b52cccd/vmlinux-1d18101a.x... kernel image: https://storage.googleapis.com/syzbot-assets/7a8898061bfb/bzImage-1d18101a.x...
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4317d7108e14e5d56308@syzkaller.appspotmail.com
Total swap = 124996kB 393083 pages RAM 0 pages HighMem/MovableOnly 184478 pages reserved 0 pages cma reserved ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5488 at drivers/dma-buf/dma-buf.c:1536 dma_buf_vmap+0x306/0x3b0 drivers/dma-buf/dma-buf.c:1536 Modules linked in: CPU: 0 UID: 0 PID: 5488 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:dma_buf_vmap+0x306/0x3b0 drivers/dma-buf/dma-buf.c:1536 Code: 64 05 cc e8 0c 99 d7 fb 90 0f 0b 90 b8 ea ff ff ff eb bc e8 fc 98 d7 fb 90 0f 0b 90 e9 0d fe ff ff e8 ee 98 d7 fb 44 89 f0 90 <0f> 0b 90 49 bd 00 00 00 00 00 fc ff df eb 91 e8 c6 9c 61 05 48 c7 RSP: 0018:ffffc90002bbf3a0 EFLAGS: 00010293 RAX: 00000000fffffff4 RBX: ffff888000e02428 RCX: ffff888000eb4900 RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000 RBP: ffffc90002bbf450 R08: ffffc90002bbf227 R09: 1ffff92000577e44 R10: dffffc0000000000 R11: fffff52000577e45 R12: ffffffff85ea4500 R13: ffff888000e02430 R14: 00000000fffffff4 R15: 1ffff110001c0485 FS: 0000555591ecc500(0000) GS:ffff88808d722000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055859af10a08 CR3: 00000000589bb000 CR4: 0000000000352ef0 Call Trace: <TASK> drm_gem_shmem_vmap_locked+0x14c/0x790 drivers/gpu/drm/drm_gem_shmem_helper.c:354 drm_gem_vmap_locked drivers/gpu/drm/drm_gem.c:1279 [inline] drm_gem_vmap+0x10a/0x1d0 drivers/gpu/drm/drm_gem.c:1321 drm_gem_fb_vmap+0xaa/0x8d0 drivers/gpu/drm/drm_gem_framebuffer_helper.c:368 drm_atomic_helper_prepare_planes+0x2d6/0xb60 drivers/gpu/drm/drm_atomic_helper.c:2760 drm_atomic_helper_commit+0x19a/0xb10 drivers/gpu/drm/drm_atomic_helper.c:2189 drm_atomic_commit+0x262/0x2c0 drivers/gpu/drm/drm_atomic.c:1577 drm_atomic_helper_update_plane+0x248/0x3b0 drivers/gpu/drm/drm_atomic_helper.c:3348 drm_mode_cursor_universal drivers/gpu/drm/drm_plane.c:1256 [inline] drm_mode_cursor_common+0xb7e/0x12d0 drivers/gpu/drm/drm_plane.c:1315 drm_mode_cursor_ioctl+0xbf/0x110 drivers/gpu/drm/drm_plane.c:1365 drm_ioctl_kernel+0x2cf/0x390 drivers/gpu/drm/drm_ioctl.c:797 drm_ioctl+0x67f/0xb10 drivers/gpu/drm/drm_ioctl.c:894 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcd9898f7c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe37777948 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcd98be5fa0 RCX: 00007fcd9898f7c9 RDX: 0000200000000280 RSI: 00000000c01c64a3 RDI: 0000000000000003 RBP: 00007ffe377779a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fcd98be5fa0 R14: 00007fcd98be5fa0 R15: 0000000000000003 </TASK>
--- 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@googlegroups.com.
syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with: #syz undup