loop0: detected capacity change from 32768 to 0
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UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:1731:12
shift exponent -256 is negative
CPU: 0 PID: 6021 Comm: syz-executor.0 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x9a/0xcc lib/dump_stack.c:120
 ubsan_epilogue+0x5/0x40 lib/ubsan.c:148
 __ubsan_handle_shift_out_of_bounds.cold+0x61/0xe9 lib/ubsan.c:395
 dbFindCtl.cold+0x69/0x77 fs/jfs/jfs_dmap.c:1731
 dbAllocAny+0x9c/0x170 fs/jfs/jfs_dmap.c:1562
 dbAlloc+0x3c7/0xa20 fs/jfs/jfs_dmap.c:851
 extBalloc fs/jfs/jfs_extent.c:518 [inline]
 extAlloc+0x434/0xc70 fs/jfs/jfs_extent.c:125
 jfs_get_block+0x4f8/0x960 fs/jfs/inode.c:256
 nobh_write_begin+0x353/0xbd0 fs/buffer.c:2648
 jfs_write_begin+0x2d/0xc0 fs/jfs/inode.c:320
 generic_perform_write+0x1ce/0x430 mm/filemap.c:3412
 __generic_file_write_iter+0x1fb/0x590 mm/filemap.c:3541
 generic_file_write_iter+0xb9/0x1c0 mm/filemap.c:3573
 call_write_iter include/linux/fs.h:1901 [inline]
 do_iter_readv_writev+0x333/0x6d0 fs/read_write.c:740
 do_iter_write+0x12a/0x5b0 fs/read_write.c:866
 vfs_writev+0x16c/0x500 fs/read_write.c:939
 do_pwritev+0x157/0x200 fs/read_write.c:1036
 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f5f0da7d5a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5f0d1f0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f5f0db9df80 RCX: 00007f5f0da7d5a9
RDX: 0000000000000002 RSI: 0000000020003380 RDI: 0000000000000003
RBP: 00007f5f0dad8580 R08: 0000000002000000 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd654fc83f R14: 00007f5f0d1f0300 R15: 0000000000022000
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