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* [syzbot] [ide?] Internal error in ata_sff_freeze
@ 2026-08-17  7:46 syzbot
  2026-08-21 21:02 ` syzbot
  0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2026-08-17  7:46 UTC (permalink / raw)
  To: cassel, dlemoal, linux-ide, linux-kernel, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    2f1baf1fc892 Merge tag 'trace-v7.2-rc7' of git://git.kerne..
git tree:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master
console output: https://syzkaller.appspot.com/x/log.txt?x=1564469e580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=97ba2e017420cdcb
dashboard link: https://syzkaller.appspot.com/bug?extid=891c7b195b408052e519
compiler:       aarch64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/fa3fbcfdac58/non_bootable_disk-2f1baf1f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2b4adcfb67df/vmlinux-2f1baf1f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/72646a392f58/Image-2f1baf1f.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+891c7b195b408052e519@syzkaller.appspotmail.com

EXT4-fs (vda): shut down requested (2)
Aborting journal on device vda-8.
Internal error: synchronous external abort: 0000000096000050 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 14268 Comm: syz.1.3901 Tainted: G   M                syzkaller #0 PREEMPT 
Tainted: [M]=MACHINE_CHECK
Hardware name: linux,dummy-virt (DT)
pstate: 814020c9 (Nzcv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : __raw_writeb arch/arm64/include/asm/io.h:29 [inline]
pc : writeb include/asm-generic/io.h:265 [inline]
pc : iowrite8 include/asm-generic/io.h:924 [inline]
pc : ata_sff_set_devctl drivers/ata/libata-sff.c:233 [inline]
pc : ata_sff_freeze+0x7c/0x90 drivers/ata/libata-sff.c:1606
lr : __ata_port_freeze drivers/ata/libata-eh.c:1124 [inline]
lr : ata_eh_freeze_port+0x34/0x5c drivers/ata/libata-eh.c:1167
sp : ffff800083c83960
x29: ffff800083c83960 x28: fdf0000006125500 x27: 0000000000000000
x26: 0000000000000001 x25: ffff800081f190d0 x24: ffff800082753b40
x23: 0000000000000000 x22: 0000000000000000 x21: f3f000003c8c0000
x20: 0000000000000000 x19: f3f000003c8c0000 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: f3f000003c8c23f6
x14: 0000000000000000 x13: 000000000006bb51 x12: ffff80007fffffff
x11: fff00000030ea808 x10: 000000800000c000 x9 : 0000000000000000
x8 : fcf0000004ada000 x7 : ffffc1ffc012b640 x6 : 0000000000000001
x5 : 00000c0000000000 x4 : ffffc1ffc012b640 x3 : ffff800082ceb208
x2 : 0000000000000000 x1 : 000000000000000a x0 : ffff8000885b1002
Call trace:
 writeb include/asm-generic/io.h:264 [inline] (P)
 iowrite8 include/asm-generic/io.h:924 [inline] (P)
 ata_sff_set_devctl drivers/ata/libata-sff.c:233 [inline] (P)
 ata_sff_freeze+0x7c/0x90 drivers/ata/libata-sff.c:1606 (P)
 __ata_port_freeze drivers/ata/libata-eh.c:1124 [inline]
 ata_eh_freeze_port+0x34/0x5c drivers/ata/libata-eh.c:1167
 ata_host_start+0x13c/0x228 drivers/ata/libata-core.c:6041
 ata_pci_sff_activate_host+0x50/0x340 drivers/ata/libata-sff.c:2275
 ata_pci_init_one+0x19c/0x1d8 drivers/ata/libata-sff.c:2402
 ata_pci_bmdma_init_one+0x14/0x20 drivers/ata/libata-sff.c:3170
 ata_generic_init_one+0xc4/0x1ac drivers/ata/ata_generic.c:209
 local_pci_probe+0x40/0xa8 drivers/pci/pci-driver.c:332
 pci_call_probe drivers/pci/pci-driver.c:394 [inline]
 __pci_device_probe drivers/pci/pci-driver.c:455 [inline]
 pci_device_probe+0xd8/0x288 drivers/pci/pci-driver.c:489
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0xbc/0x2bc drivers/base/dd.c:706
 __driver_probe_device+0x118/0x16c drivers/base/dd.c:868
 device_driver_attach+0x48/0xb4 drivers/base/dd.c:1203
 bind_store+0x7c/0xd8 drivers/base/bus.c:267
 drv_attr_store+0x24/0x40 drivers/base/bus.c:125
 sysfs_kf_write+0x7c/0x98 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x138/0x200 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x244/0x36c fs/read_write.c:687
 ksys_write+0x70/0x108 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __arm64_sys_write+0x1c/0x30 fs/read_write.c:747
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x54/0x10c arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x1c/0x34 arch/arm64/kernel/syscall.c:140
 el0_svc+0x38/0x1fc arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0xa0/0xf0 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:594
Code: d65f03c0 f9404800 b4fffe60 d50332bf (39000001) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d65f03c0 	ret
   4:	f9404800 	ldr	x0, [x0, #144]
   8:	b4fffe60 	cbz	x0, 0xffffffffffffffd4
   c:	d50332bf 	dmb	oshst
* 10:	39000001 	strb	w1, [x0] <-- trapping instruction


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