Hello, syzbot found the following issue on: HEAD commit: d2b6f8a1 Merge tag 'xfs-5.13-merge-3' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11dfac0dd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=d360b81e47df40ea dashboard link: https://syzkaller.appspot.com/bug?extid=cf89d662483d6a1a0790 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17051fc3d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=163ab395d00000 The issue was bisected to: commit dcd479e10a0510522a5d88b29b8f79ea3467d501 Author: Johannes Berg <johannes.berg@xxxxxxxxx> Date: Fri Oct 9 12:17:11 2020 +0000 mac80211: always wind down STA state bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10795f2dd00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=12795f2dd00000 console output: https://syzkaller.appspot.com/x/log.txt?x=14795f2dd00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cf89d662483d6a1a0790@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: dcd479e10a05 ("mac80211: always wind down STA state") ================================================================================ 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 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
