Warning: Permanently added '10.128.0.77' (ED25519) to the list of known hosts.
executing program
[   43.263541][ T3962] loop0: detected capacity change from 0 to 32768
[   43.567660][ T3962] ================================================================================
[   43.569649][ T3962] UBSAN: shift-out-of-bounds in fs/jfs/jfs_extent.c:511:16
[   43.571100][ T3962] shift exponent -1 is negative
[   43.572113][ T3962] CPU: 0 PID: 3962 Comm: syz-executor281 Not tainted 5.15.120-syzkaller #0
[   43.573936][ T3962] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
[   43.576035][ T3962] Call trace:
[   43.576787][ T3962]  dump_backtrace+0x0/0x530
[   43.577717][ T3962]  show_stack+0x2c/0x3c
[   43.578602][ T3962]  dump_stack_lvl+0x108/0x170
[   43.579566][ T3962]  dump_stack+0x1c/0x58
[   43.580475][ T3962]  __ubsan_handle_shift_out_of_bounds+0x2f8/0x378
[   43.581840][ T3962]  extAlloc+0xbd4/0xe38
[   43.582742][ T3962]  jfs_get_block+0x34c/0xbfc
[   43.583676][ T3962]  nobh_write_begin+0x2d8/0xa28
[   43.584769][ T3962]  jfs_write_begin+0x58/0xa0
[   43.585745][ T3962]  generic_perform_write+0x24c/0x520
[   43.586842][ T3962]  __generic_file_write_iter+0x230/0x454
[   43.588009][ T3962]  generic_file_write_iter+0xb4/0x1b8
[   43.589212][ T3962]  vfs_write+0x87c/0xb3c
[   43.590140][ T3962]  ksys_write+0x15c/0x26c
[   43.591056][ T3962]  __arm64_sys_write+0x7c/0x90
[   43.592026][ T3962]  invoke_syscall+0x98/0x2b8
[   43.593025][ T3962]  el0_svc_common+0x138/0x258
[   43.593965][ T3962]  do_el0_svc+0x58/0x14c
[   43.594871][ T3962]  el0_svc+0x7c/0x1f0
[   43.595702][ T3962]  el0t_64_sync_handler+0x84/0xe4
[   43.596801][ T3962]  el0t_64_sync+0x1a0/0x1a4
[   43.597840][ T3962] ================================================================================