------------[ cut here ]------------ kernel BUG at drivers/dma-buf/dma-buf.c:99! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7247 Comm: syz-executor.0 Not tainted 5.6.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dma_buf_release+0x36b/0x440 drivers/dma-buf/dma-buf.c:99 Code: d0 00 00 00 45 31 e4 e8 c3 eb 45 fd 48 89 ef e8 bb eb 45 fd e8 a6 24 09 fd 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 e8 95 24 09 fd <0f> 0b e8 8e 24 09 fd 4c 89 e7 e8 f6 e2 00 00 e9 6a ff ff ff e8 7c RSP: 0018:ffffc900020f7e00 EFLAGS: 00010293 RAX: ffff8880a8384580 RBX: 0000000000000004 RCX: ffffffff8469cd06 RDX: 0000000000000000 RSI: ffffffff8469cf8b RDI: 0000000000000005 RBP: ffff88809a707800 R08: ffff8880a8384580 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888096a1ab04 R13: ffff888096a1aaa8 R14: ffff88808a4b2b00 R15: ffffffff8469cc20 FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:000000000a180900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00005619861e4858 CR3: 00000000a79ae000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __fput+0x2e9/0x860 fs/file_table.c:280 task_work_run+0xf4/0x1b0 kernel/task_work.c:123 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2fa/0x360 arch/x86/entry/common.c:165 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_32_irqs_on arch/x86/entry/common.c:340 [inline] do_fast_syscall_32+0xbef/0xe90 arch/x86/entry/common.c:396 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Modules linked in: ---[ end trace 494db15ca1cf5a14 ]--- RIP: 0010:dma_buf_release+0x36b/0x440 drivers/dma-buf/dma-buf.c:99 Code: d0 00 00 00 45 31 e4 e8 c3 eb 45 fd 48 89 ef e8 bb eb 45 fd e8 a6 24 09 fd 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 e8 95 24 09 fd <0f> 0b e8 8e 24 09 fd 4c 89 e7 e8 f6 e2 00 00 e9 6a ff ff ff e8 7c RSP: 0018:ffffc900020f7e00 EFLAGS: 00010293 RAX: ffff8880a8384580 RBX: 0000000000000004 RCX: ffffffff8469cd06 RDX: 0000000000000000 RSI: ffffffff8469cf8b RDI: 0000000000000005 RBP: ffff88809a707800 R08: ffff8880a8384580 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888096a1ab04 R13: ffff888096a1aaa8 R14: ffff88808a4b2b00 R15: ffffffff8469cc20 FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:000000000a180900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00005619861e4858 CR3: 00000000a79ae000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400