================================================================================ 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: 1 PID: 8457 Comm: systemd-udevd Not tainted 5.12.0-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+0x141/0x1d7 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:327 do_mpage_readpage.cold+0x226/0x2bb fs/mpage.c:189 mpage_readahead+0x3a3/0x880 fs/mpage.c:389 read_pages+0x1df/0x8d0 mm/readahead.c:130 page_cache_ra_unbounded+0x61f/0x920 mm/readahead.c:238 do_page_cache_ra mm/readahead.c:267 [inline] force_page_cache_ra+0x3ba/0x5b0 mm/readahead.c:299 page_cache_sync_ra+0x107/0x200 mm/readahead.c:573 page_cache_sync_readahead include/linux/pagemap.h:864 [inline] filemap_get_pages+0x29f/0x1920 mm/filemap.c:2442 filemap_read+0x2ca/0xe40 mm/filemap.c:2525 generic_file_read_iter+0x397/0x4f0 mm/filemap.c:2676 blkdev_read_iter+0x11b/0x180 fs/block_dev.c:1720 call_read_iter include/linux/fs.h:2110 [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_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fdc7280d210 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: 002