================================================================================ UBSAN: shift-out-of-bounds in ./include/linux/log2.h:67:13 shift exponent 4294967295 is too large for 64-bit type 'long unsigned int' CPU: 1 PID: 11250 Comm: syz-executor.5 Not tainted 5.10.0-rc7-next-20201210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:395 __rounddown_pow_of_two include/linux/log2.h:67 [inline] snd_pcm_oss_period_size sound/core/oss/pcm_oss.c:696 [inline] snd_pcm_oss_change_params_locked.cold+0x73/0x78 sound/core/oss/pcm_oss.c:925 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1084 [inline] snd_pcm_oss_make_ready+0xe7/0x1b0 sound/core/oss/pcm_oss.c:1143 snd_pcm_oss_sync+0x2e0/0x800 sound/core/oss/pcm_oss.c:1642 snd_pcm_oss_release+0x276/0x300 sound/core/oss/pcm_oss.c:2546 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417ab1 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 a4 1a 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fff833130d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000417ab1 RDX: 0000000000000000 RSI: 0000000000000ccb RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000a2efaccb R09: 00000000a2efaccf R10: 00007fff833131b0 R11: 0000000000000293 R12: ffffffffffffffff R13: 0000000000066c46 R14: 00000000000003e8 R15: 000000000119bf8c ================================================================================