loop2: detected capacity change from 0 to 32768
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2317:2
index 2621480 is out of range for type 's64[128]' (aka 'long long[128]')
CPU: 1 PID: 4153 Comm: syz.2.3 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 ubsan_epilogue+0x14/0x48 lib/ubsan.c:151
 __ubsan_handle_out_of_bounds+0xd4/0x108 lib/ubsan.c:282
 dbAllocBits+0x874/0x8bc fs/jfs/jfs_dmap.c:2317
 dbAllocDmap fs/jfs/jfs_dmap.c:2094 [inline]
 dbAllocNear+0x25c/0x350 fs/jfs/jfs_dmap.c:1315
 dbAlloc+0x760/0x978 fs/jfs/jfs_dmap.c:832
 extBalloc fs/jfs/jfs_extent.c:523 [inline]
 extAlloc+0x3f4/0xdc4 fs/jfs/jfs_extent.c:125
 jfs_get_block+0x2bc/0x8ec fs/jfs/inode.c:258
 __mpage_writepage+0x390/0x154c fs/mpage.c:564
 write_cache_pages+0x7c8/0xde4 mm/page-writeback.c:2277
 mpage_writepages+0xe4/0x218 fs/mpage.c:712
 jfs_writepages+0x30/0x40 fs/jfs/inode.c:293
 do_writepages+0x36c/0x578 mm/page-writeback.c:2386
 filemap_fdatawrite_wbc+0x1d4/0x234 mm/filemap.c:400
 __filemap_fdatawrite_range mm/filemap.c:433 [inline]
 file_write_and_wait_range+0x100/0x1c0 mm/filemap.c:810
 jfs_fsync+0x78/0x1bc fs/jfs/file.c:24
 vfs_fsync_range fs/sync.c:188 [inline]
 vfs_fsync fs/sync.c:202 [inline]
 do_fsync fs/sync.c:212 [inline]
 __do_sys_fdatasync fs/sync.c:225 [inline]
 __se_sys_fdatasync fs/sync.c:223 [inline]
 __arm64_sys_fdatasync+0xac/0x104 fs/sync.c:223
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
================================================================================
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_extent.c:549:16
index 2621480 is out of range for type 'atomic_t[128]'
CPU: 1 PID: 4153 Comm: syz.2.3 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 ubsan_epilogue+0x14/0x48 lib/ubsan.c:151
 __ubsan_handle_out_of_bounds+0xd4/0x108 lib/ubsan.c:282
 extBalloc fs/jfs/jfs_extent.c:549 [inline]
 extAlloc+0xcc0/0xdc4 fs/jfs/jfs_extent.c:125
 jfs_get_block+0x2bc/0x8ec fs/jfs/inode.c:258
 __mpage_writepage+0x390/0x154c fs/mpage.c:564
 write_cache_pages+0x7c8/0xde4 mm/page-writeback.c:2277
 mpage_writepages+0xe4/0x218 fs/mpage.c:712
 jfs_writepages+0x30/0x40 fs/jfs/inode.c:293
 do_writepages+0x36c/0x578 mm/page-writeback.c:2386
 filemap_fdatawrite_wbc+0x1d4/0x234 mm/filemap.c:400
 __filemap_fdatawrite_range mm/filemap.c:433 [inline]
 file_write_and_wait_range+0x100/0x1c0 mm/filemap.c:810
 jfs_fsync+0x78/0x1bc fs/jfs/file.c:24
 vfs_fsync_range fs/sync.c:188 [inline]
 vfs_fsync fs/sync.c:202 [inline]
 do_fsync fs/sync.c:212 [inline]
 __do_sys_fdatasync fs/sync.c:225 [inline]
 __se_sys_fdatasync fs/sync.c:223 [inline]
 __arm64_sys_fdatasync+0xac/0x104 fs/sync.c:223
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
================================================================================
ERROR: (device loop2): dbAlloc: the hint is outside the map

ERROR: (device loop2): remounting filesystem as read-only
attempt to access beyond end of device
loop2: rw=2049, want=171801313640, limit=32768
ERROR: (device loop2): dbAlloc: the hint is outside the map

attempt to access beyond end of device
loop2: rw=2049, want=171801313648, limit=32768