UBSAN: shift-out-of-bounds in ata_qc

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
487e78ad	repro		❓	UBSAN: shift-out-of-bounds in ata_qc_issue	2026/03/06 06:42	2026/03/06 06:42	2026/03/06 06:51	31e9c887

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[syzbot] [ide?] UBSAN: shift-out-of-bounds in ata_qc_issue	7 (8)	2026/02/20 09:27

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[syzbot] [ide?] UBSAN: shift-out-of-bounds in ata_qc_issue

7 (8)

2026/02/20 09:27

------------[ cut here ]------------ UBSAN: shift-out-of-bounds in drivers/ata/libata-core.c:5166:24 shift exponent 4210818301 is too large for 64-bit type 'long long unsigned int' CPU: 2 UID: 0 PID: 1282 Comm: kworker/2:1H Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events_highpri ata_scsi_deferred_qc_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 ubsan_epilogue+0xa/0x30 lib/ubsan.c:233 __ubsan_handle_shift_out_of_bounds+0x279/0x2a0 lib/ubsan.c:494 ata_qc_issue.cold+0x38/0x9f drivers/ata/libata-core.c:5166 ata_scsi_deferred_qc_work+0x154/0x1f0 drivers/ata/libata-scsi.c:1679 process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275 process_scheduled_works kernel/workqueue.c:3358 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3439 kthread+0x370/0x450 kernel/kthread.c:467 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> ---[ end trace ]--- Kernel panic - not syncing: UBSAN: panic_on_warn set ... CPU: 2 UID: 0 PID: 1282 Comm: kworker/2:1H Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events_highpri ata_scsi_deferred_qc_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x552/0x970 kernel/panic.c:650 panic+0xd1/0xe0 kernel/panic.c:787 check_panic_on_warn kernel/panic.c:524 [inline] check_panic_on_warn.cold+0x19/0x34 kernel/panic.c:519 __ubsan_handle_shift_out_of_bounds+0x279/0x2a0 lib/ubsan.c:494 ata_qc_issue.cold+0x38/0x9f drivers/ata/libata-core.c:5166 ata_scsi_deferred_qc_work+0x154/0x1f0 drivers/ata/libata-scsi.c:1679 process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275 process_scheduled_works kernel/workqueue.c:3358 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3439 kthread+0x370/0x450 kernel/kthread.c:467 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Kernel Offset: disabled Rebooting in 86400 seconds..

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Assets (help?)	Manager	Title
2026/02/15 09:15	upstream	ca4ee40bf13d	1e62d198	.config	console log	report	info	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu-upstream	UBSAN: shift-out-of-bounds in ata_qc_issue
2026/02/14 15:23	upstream	770aaedb461a	1e62d198	.config	console log	report	info	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu-upstream-386	UBSAN: shift-out-of-bounds in ata_qc_issue
2026/02/14 03:30	upstream	cee73b1e840c	1e62d198	.config	console log	report	info	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu-upstream-386	UBSAN: shift-out-of-bounds in ata_qc_issue
2026/02/13 20:48	upstream	cee73b1e840c	1e62d198	.config	console log	report	info	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu-upstream-386	UBSAN: shift-out-of-bounds in ata_qc_issue

Crashes (4):

Assets (help?)