loop3: rw=0, sector=64, nr_sectors = 8 limit=0 syz.3.72: attempt to access beyond end of device loop3: rw=0, sector=120, nr_sectors = 8 limit=0 ERROR: (device loop3): remounting filesystem as read-only ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:3025:47 shift exponent 32 is too large for 32-bit type 'u32' (aka 'unsigned int') CPU: 1 UID: 0 PID: 6236 Comm: syz.3.72 Not tainted 6.11.0-rc4-syzkaller-00033-g872cf28b8df9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468 dbFindBits+0x11a/0x1d0 fs/jfs/jfs_dmap.c:3025 dbAllocDmapLev+0x1e9/0x4a0 fs/jfs/jfs_dmap.c:1985 dbAllocCtl+0x113/0x920 fs/jfs/jfs_dmap.c:1825 dbAllocAG+0x28f/0x10b0 fs/jfs/jfs_dmap.c:1364 dbDiscardAG+0x352/0xa20 fs/jfs/jfs_dmap.c:1613 jfs_ioc_trim+0x433/0x670 fs/jfs/jfs_discard.c:100 jfs_ioctl+0x2d0/0x3e0 fs/jfs/ioctl.c:131 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3b5fb79e79 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3b60926038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f3b5fd15f80 RCX: 00007f3b5fb79e79 RDX: 0000000020000680 RSI: 00000000c0185879 RDI: 0000000000000006 RBP: 00007f3b5fbe7916 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3b5fd15f80 R15: 00007ffd35462fe8 ---[ end trace ]---