UBSAN: shift-out-of-bounds in extAlloc (2)

Date	Name	Commit	Repro	Result
2025/05/14	upstream (ToT)	1a80a098c606	C	[report] UBSAN: shift-out-of-bounds in extAlloc

Date

Name

Commit

Repro

Result

2025/05/14

upstream (ToT)

1a80a098c606

[report] UBSAN: shift-out-of-bounds in extAlloc

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	UBSAN: shift-out-of-bounds in extAlloc jfs	C	error		6605	603d	963d	23/28	fixed on 2023/10/12 12:47
linux-5.15	UBSAN: shift-out-of-bounds in extAlloc origin:upstream	C		done	217	607d	799d	3/3	fixed on 2023/10/20 00:28
linux-6.1	UBSAN: shift-out-of-bounds in extAlloc origin:upstream missing-backport	C		done	204	32d	796d	3/3	fixed on 2025/05/02 07:04
upstream	UBSAN: shift-out-of-bounds in extAlloc (2) jfs	C	inconclusive		5	126d	378d	0/28	upstream: reported C repro on 2024/05/03 13:40

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: 0 PID: 4022 Comm: syz-executor958 Not tainted 5.15.182-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 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:2716:11 shift exponent 94 is too large for 32-bit type 'int' CPU: 0 PID: 4022 Comm: syz-executor958 Not tainted 5.15.182-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 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:2716 dbAdjCtl+0x2bc/0x8c8 fs/jfs/jfs_dmap.c:2608 dbAllocDmap+0xb0/0x128 fs/jfs/jfs_dmap.c:2119 dbAllocNext+0x35c/0x3a0 fs/jfs/jfs_dmap.c:1254 dbAlloc+0x334/0x978 fs/jfs/jfs_dmap.c:820 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: 4022 at fs/jfs/jfs_dmap.c:2950 dbAdjTree+0x3a8/0x414 fs/jfs/jfs_dmap.c:2950 Modules linked in: CPU: 0 PID: 4022 Comm: syz-executor958 Not tainted 5.15.182-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : dbAdjTree+0x3a8/0x414 fs/jfs/jfs_dmap.c:2950 lr : dbAdjTree+0x3a8/0x414 fs/jfs/jfs_dmap.c:2950 sp : ffff80001cf971f0 x29: ffff80001cf97200 x28: dfff800000000000 x27: ffff0000d5754011 x26: 000000000000005e x25: ffff0000d5754000 x24: 0000000040000155 x23: ffff0000d5754008 x22: 0000000000000555 x21: 0000000040000000 x20: 000000000000006b x19: dfff800000000000 x18: 0000000000000001 x17: 0000000000000000 x16: ffff8000081844d8 x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff8000097a9dec x8 : ffff0000c2718000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001cf96a98 x4 : ffff80001422f280 x3 : 0000000000000001 x2 : 000000000000006b x1 : 0000000000000555 x0 : 0000000040000155 Call trace: dbAdjTree+0x3a8/0x414 fs/jfs/jfs_dmap.c:2950 dbSplit+0x10c/0x1d8 fs/jfs/jfs_dmap.c:2723 dbAdjCtl+0x2bc/0x8c8 fs/jfs/jfs_dmap.c:2608 dbAllocDmap+0xb0/0x128 fs/jfs/jfs_dmap.c:2119 dbAllocNext+0x35c/0x3a0 fs/jfs/jfs_dmap.c:1254 dbAlloc+0x334/0x978 fs/jfs/jfs_dmap.c:820 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: 106784 hardirqs last enabled at (106783): [<ffff8000082f7640>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (106784): [<ffff8000111a0cd0>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (106768): [<ffff80000819d0d8>] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (106768): [<ffff80000819d0d8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586 softirqs last disabled at (106751): [<ffff80000819d6dc>] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (106751): [<ffff80000819d6dc>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (106751): [<ffff80000819d6dc>] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (106751): [<ffff80000819d6dc>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641 ---[ end trace b9cf5642d8deefa6 ]--- JFS: block map error in dbBackSplit

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/05/14 03:44	linux-5.15.y	3b8db0e4f263	7344edeb	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)]	ci2-linux-5-15-kasan-arm64	UBSAN: shift-out-of-bounds in extAlloc

Crashes (1):

Assets (help?)