UBSAN: shift-out-of-bounds in fs/mpage.c:189:40 shift exponent 4294967279 is too large for 64-bit type 'long long unsigned int' CPU: 0 PID: 16448 Comm: systemd-udevd Not tainted 5.14.0-rc2-next-20210723-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327 do_mpage_readpage.cold+0x24a/0x2b6 fs/mpage.c:189 mpage_readahead+0x304/0x750 fs/mpage.c:389 read_pages+0x1e4/0xfa0 mm/readahead.c:130 page_cache_ra_unbounded+0x64b/0x940 mm/readahead.c:239 do_page_cache_ra mm/readahead.c:269 [inline] force_page_cache_ra+0x3ba/0x5b0 mm/readahead.c:301 page_cache_sync_ra+0x107/0x200 mm/readahead.c:575 page_cache_sync_readahead include/linux/pagemap.h:1026 [inline] filemap_get_pages+0x2b2/0x1be0 mm/filemap.c:2532 filemap_read+0x2ca/0xe40 mm/filemap.c:2615 generic_file_read_iter+0x397/0x4f0 mm/filemap.c:2766 blkdev_read_iter+0x127/0x1c0 fs/block_dev.c:1669 call_read_iter include/linux/fs.h:2146 [inline] new_sync_read+0x41e/0x6e0 fs/read_write.c:415 vfs_read+0x35c/0x570 fs/read_write.c:496 ksys_read+0x12d/0x250 fs/read_write.c:634 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f1dec3c7210 Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24 RSP: 002b:00007ffc6863d338 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000055f7ac861540 RCX: 00007f1dec3c7210 RDX: 0000000000000400 RSI: 000055f7ac861568 RDI: 000000000000000f RBP: 000055f7ac862e30 R08: 00007f1dec3b1f78 R09: 0000000000000430 R10: 000000000000006d R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000400 R14: 000055f7ac862e80 R15: 0000000000000400 ================================================================================