------------[ cut here ]------------ kernel BUG at drivers/dma-buf/dma-buf.c:73! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9373 Comm: syz-executor.4 Not tainted 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dma_buf_release+0x329/0x3f0 drivers/dma-buf/dma-buf.c:73 Code: 3c 02 00 0f 85 8f 00 00 00 48 8b bd d0 00 00 00 e8 1c 97 32 fd 48 89 ef 5b 5d 41 5c 41 5d 41 5e e9 0c 97 32 fd e8 87 f3 f2 fc <0f> 0b e8 80 f3 f2 fc 4c 89 e7 e8 f8 d0 00 00 e9 76 ff ff ff e8 6e RSP: 0018:ffffc90008647b50 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffffff84814914 RDX: ffff88808f4781c0 RSI: ffffffff84814b89 RDI: 0000000000000005 RBP: ffff8880a5c3f800 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888076011960 R13: ffff8880760118e8 R14: ffff888076011930 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:00000000f7769b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000008fa0004 CR3: 00000000a8de1000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __dentry_kill+0x42b/0x640 fs/dcache.c:584 dentry_kill fs/dcache.c:705 [inline] dput+0x725/0xbc0 fs/dcache.c:878 __fput+0x3ab/0x920 fs/file_table.c:294 task_work_run+0xdd/0x190 kernel/task_work.c:141 get_signal+0xd89/0x1f00 kernel/signal.c:2561 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:136 [inline] exit_to_user_mode_prepare+0x15d/0x1c0 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242 __do_fast_syscall_32+0x63/0x80 arch/x86/entry/common.c:127 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f90549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f77690cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: fffffffffffffe00 RBX: 0000000000000005 RCX: 0000000040086200 RDX: 0000000020000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace a51f052a2dab7c2a ]--- RIP: 0010:dma_buf_release+0x329/0x3f0 drivers/dma-buf/dma-buf.c:73 Code: 3c 02 00 0f 85 8f 00 00 00 48 8b bd d0 00 00 00 e8 1c 97 32 fd 48 89 ef 5b 5d 41 5c 41 5d 41 5e e9 0c 97 32 fd e8 87 f3 f2 fc <0f> 0b e8 80 f3 f2 fc 4c 89 e7 e8 f8 d0 00 00 e9 76 ff ff ff e8 6e RSP: 0018:ffffc90008647b50 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffffff84814914 RDX: ffff88808f4781c0 RSI: ffffffff84814b89 RDI: 0000000000000005 RBP: ffff8880a5c3f800 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888076011960 R13: ffff8880760118e8 R14: ffff888076011930 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000f7769b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007f664c41b000 CR3: 00000000a8de1000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400