================================================================================
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: 0 PID: 368 Comm: kworker/u4:4 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: writeback wb_workfn (flush-7:0)
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
 __writeback_single_inode+0x148/0x11f0 fs/fs-writeback.c:1647
 writeback_sb_inodes+0x7fc/0x1378 fs/fs-writeback.c:1930
 wb_writeback+0x3d8/0xe44 fs/fs-writeback.c:2104
 wb_do_writeback fs/fs-writeback.c:2247 [inline]
 wb_workfn+0x350/0xdd8 fs/fs-writeback.c:2288
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855
================================================================================
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_extent.c:545:16
index 2621480 is out of range for type 'atomic_t[128]'
CPU: 0 PID: 368 Comm: kworker/u4:4 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: writeback wb_workfn (flush-7:0)
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:545 [inline]
 extAlloc+0xc90/0xdc4 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
 __writeback_single_inode+0x148/0x11f0 fs/fs-writeback.c:1647
 writeback_sb_inodes+0x7fc/0x1378 fs/fs-writeback.c:1930
 wb_writeback+0x3d8/0xe44 fs/fs-writeback.c:2104
 wb_do_writeback fs/fs-writeback.c:2247 [inline]
 wb_workfn+0x350/0xdd8 fs/fs-writeback.c:2288
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855
================================================================================
attempt to access beyond end of device
loop0: rw=1, want=171801313640, limit=32768
attempt to access beyond end of device
loop0: rw=1, want=171801313640, limit=32768