loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: shift-out-of-bounds in fs/jfs/jfs_extent.c:516:16 shift exponent 108 is too large for 64-bit type 's64' (aka 'long long') CPU: 1 PID: 4963 Comm: syz.0.16 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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_shift_out_of_bounds+0x2b4/0x358 lib/ubsan.c:321 extBalloc fs/jfs/jfs_extent.c:516 [inline] extAlloc+0xaa8/0xdc4 fs/jfs/jfs_extent.c:125 jfs_get_block+0x2bc/0x8ec fs/jfs/inode.c:258 nobh_write_begin+0x2d8/0x9d4 fs/buffer.c:2650 jfs_write_begin+0x58/0xa0 fs/jfs/inode.c:322 generic_perform_write+0x204/0x480 mm/filemap.c:3785 __generic_file_write_iter+0x23c/0x454 mm/filemap.c:3912 generic_file_write_iter+0xb0/0x1b4 mm/filemap.c:3944 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x7c8/0xa2c fs/read_write.c:594 ksys_write+0x120/0x210 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __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: shift-out-of-bounds in fs/jfs/jfs_dmap.c:2709:11 shift exponent 94 is too large for 32-bit type 'int' CPU: 1 PID: 4963 Comm: syz.0.16 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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_shift_out_of_bounds+0x2b4/0x358 lib/ubsan.c:321 dbSplit+0x1d4/0x1d8 fs/jfs/jfs_dmap.c:2709 dbAdjCtl+0x2bc/0x8c8 fs/jfs/jfs_dmap.c:2601 dbAllocDmap+0xb0/0x128 fs/jfs/jfs_dmap.c:2112 dbAllocNext+0x35c/0x3a0 fs/jfs/jfs_dmap.c:1239 dbAlloc+0x334/0x978 fs/jfs/jfs_dmap.c:805 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 nobh_write_begin+0x2d8/0x9d4 fs/buffer.c:2650 jfs_write_begin+0x58/0xa0 fs/jfs/inode.c:322 generic_perform_write+0x204/0x480 mm/filemap.c:3785 __generic_file_write_iter+0x23c/0x454 mm/filemap.c:3912 generic_file_write_iter+0xb0/0x1b4 mm/filemap.c:3944 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x7c8/0xa2c fs/read_write.c:594 ksys_write+0x120/0x210 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __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 ================================================================================ ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4963 at fs/jfs/jfs_dmap.c:2943 dbAdjTree+0x3a8/0x414 fs/jfs/jfs_dmap.c:2943 Modules linked in: CPU: 0 PID: 4963 Comm: syz.0.16 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : dbAdjTree+0x3a8/0x414 fs/jfs/jfs_dmap.c:2943 lr : dbAdjTree+0x3a8/0x414 fs/jfs/jfs_dmap.c:2943 sp : ffff80001fdc71f0 x29: ffff80001fdc7200 x28: dfff800000000000 x27: ffff0000ca372011 x26: 000000000000005e x25: ffff0000ca372000 x24: 0000000040000155 x23: ffff0000ca372008 x22: 0000000000000555 x21: 0000000040000000 x20: 000000000000006b x19: dfff800000000000 x18: 0000000000000001 x17: 0000000000000000 x16: ffff800008185df4 x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000979f834 x8 : ffff0000cbfc8000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001fdc6a98 x4 : ffff80001425f420 x3 : 0000000000000001 x2 : 000000000000006b x1 : 0000000000000555 x0 : 0000000040000155 Call trace: dbAdjTree+0x3a8/0x414 fs/jfs/jfs_dmap.c:2943 dbSplit+0x10c/0x1d8 fs/jfs/jfs_dmap.c:2716 dbAdjCtl+0x2bc/0x8c8 fs/jfs/jfs_dmap.c:2601 dbAllocDmap+0xb0/0x128 fs/jfs/jfs_dmap.c:2112 dbAllocNext+0x35c/0x3a0 fs/jfs/jfs_dmap.c:1239 dbAlloc+0x334/0x978 fs/jfs/jfs_dmap.c:805 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 nobh_write_begin+0x2d8/0x9d4 fs/buffer.c:2650 jfs_write_begin+0x58/0xa0 fs/jfs/inode.c:322 generic_perform_write+0x204/0x480 mm/filemap.c:3785 __generic_file_write_iter+0x23c/0x454 mm/filemap.c:3912 generic_file_write_iter+0xb0/0x1b4 mm/filemap.c:3944 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x7c8/0xa2c fs/read_write.c:594 ksys_write+0x120/0x210 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __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 irq event stamp: 102098 hardirqs last enabled at (102097): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (102098): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (102084): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (102084): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (102049): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (102049): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (102049): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (102049): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace 4287f13618485cae ]--- JFS: block map error in dbBackSplit