loop4: detected capacity change from 0 to 32768
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UBSAN: shift-out-of-bounds in fs/jfs/jfs_extent.c:314:16
shift exponent -1 is negative
CPU: 1 PID: 25690 Comm: syz-executor.4 Not tainted 6.5.0-syzkaller-01207-g1c59d383390f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_shift_out_of_bounds+0x27a/0x600 lib/ubsan.c:387
 extBalloc fs/jfs/jfs_extent.c:314 [inline]
 extAlloc.cold+0x8b/0xc5 fs/jfs/jfs_extent.c:122
 jfs_get_block+0x428/0xb20 fs/jfs/inode.c:248
 get_more_blocks fs/direct-io.c:647 [inline]
 do_direct_IO fs/direct-io.c:935 [inline]
 __blockdev_direct_IO+0x2458/0x3cd0 fs/direct-io.c:1248
 blockdev_direct_IO include/linux/fs.h:3009 [inline]
 jfs_direct_IO+0x10c/0x2c0 fs/jfs/inode.c:331
 generic_file_direct_write+0x132/0x360 mm/filemap.c:3853
 __generic_file_write_iter+0x11d/0x240 mm/filemap.c:4009
 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4049
 call_write_iter include/linux/fs.h:1985 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x650/0xe40 fs/read_write.c:584
 ksys_write+0x12f/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8c1307cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8c13e0d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c1319bf80 RCX: 00007f8c1307cae9
RDX: 00000000fffffdef RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007f8c130c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8c1319bf80 R15: 00007ffcb9f99a38
 </TASK>
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