kernel BUG in indx_clear

Status: upstream: reported C repro on 2026/09/14 13:22
Reported-by: syzbot+06cac371b8fe4ccb0ce4@syzkaller.appspotmail.com
First crash: 4d05h, last: 10h27m

Sample crash report:
------------[ cut here ]------------
kernel BUG at arch/x86/mm/physaddr.c:28!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5893 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__phys_addr+0xea/0xf0 arch/x86/mm/physaddr.c:28
Code: a2 00 48 89 d8 eb 82 48 c7 c7 a0 4f fa 8c 48 89 c6 48 89 ca 48 89 c3 49 89 ce e8 81 58 2a 03 4c 89 f1 48 89 d8 e9 6c ff ff ff <0f> 0b 0f 0b 66 90 f3 0f 1e fa 53 48 89 fb 48 81 eb 00 00 00 80 48
RSP: 0018:ffffc9000336f958 EFLAGS: 00010206
RAX: deadc62d00000000 RBX: dead4ead80000000 RCX: 0000778000000000
RDX: 0000000000000000 RSI: ffffffff8b1d3b80 RDI: dead4ead00000000
RBP: 0000000000000001 R08: ffff88805f5fb5e0 R09: 0000000000000000
R10: ffff88805f5fb5d0 R11: ffffed100bebf6bd R12: dffffc0000000000
R13: ffff88805f5fb6d8 R14: ffffffff82d0406e R15: dffffc0000000000
FS:  000055555d0a8500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffec0220ff0 CR3: 000000006c389000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 virt_to_folio include/linux/mm.h:1289 [inline]
 kfree+0x43/0x1a0 mm/slab_common.c:1048
 run_close fs/ntfs3/ntfs_fs.h:953 [inline]
 indx_clear+0x3e/0x80 fs/ntfs3/index.c:870
 ni_clear+0x211/0x460 fs/ntfs3/frecord.c:123
 evict+0x4b7/0x8a0 fs/inode.c:705
 __dentry_kill+0x412/0x630 fs/dcache.c:611
 shrink_dentry_list+0x39a/0x6b0 fs/dcache.c:1206
 shrink_dcache_parent+0xb2/0x3f0 fs/dcache.c:-1
 do_one_tree+0x23/0xe0 fs/dcache.c:1686
 shrink_dcache_for_umount+0x69/0x110 fs/dcache.c:1703
 generic_shutdown_super+0x67/0x2b0 fs/super.c:665
 kill_block_super+0x44/0x90 fs/super.c:1668
 ntfs3_kill_sb+0x44/0x1b0 fs/ntfs3/super.c:1804
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x3d7/0x460 fs/namespace.c:1259
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:180
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
 __syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:305
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6a3079f397
Code: a2 c7 05 5c 43 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffec0221148 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f6a3083448b RCX: 00007f6a3079f397
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffec0221200
RBP: 00007ffec0221200 R08: 00007ffec0222200 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec0222290
R13: 00007f6a3083448b R14: 000000000001ec96 R15: 00007ffec02222d0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__phys_addr+0xea/0xf0 arch/x86/mm/physaddr.c:28
Code: a2 00 48 89 d8 eb 82 48 c7 c7 a0 4f fa 8c 48 89 c6 48 89 ca 48 89 c3 49 89 ce e8 81 58 2a 03 4c 89 f1 48 89 d8 e9 6c ff ff ff <0f> 0b 0f 0b 66 90 f3 0f 1e fa 53 48 89 fb 48 81 eb 00 00 00 80 48
RSP: 0018:ffffc9000336f958 EFLAGS: 00010206
RAX: deadc62d00000000 RBX: dead4ead80000000 RCX: 0000778000000000
RDX: 0000000000000000 RSI: ffffffff8b1d3b80 RDI: dead4ead00000000
RBP: 0000000000000001 R08: ffff88805f5fb5e0 R09: 0000000000000000
R10: ffff88805f5fb5d0 R11: ffffed100bebf6bd R12: dffffc0000000000
R13: ffff88805f5fb6d8 R14: ffffffff82d0406e R15: dffffc0000000000
FS:  000055555d0a8500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000255235bb7ff8 CR3: 000000006c389000 CR4: 00000000003506f0

Crashes (52):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/15 03:48 linux-6.6.y 79643295eba1 81a27d1a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/18 08:04 linux-6.6.y 79643295eba1 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/18 06:15 linux-6.6.y 79643295eba1 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/17 17:07 linux-6.6.y 79643295eba1 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/17 07:19 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/17 04:58 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 23:10 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 23:10 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 23:10 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 23:10 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 06:26 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 06:26 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 06:24 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 06:23 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 05:02 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 05:02 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 05:02 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/16 05:02 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:34 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:34 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:34 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:32 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:32 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:32 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:31 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:29 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:29 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 16:29 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 14:38 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 14:38 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 14:38 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 14:38 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/15 14:38 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 16:37 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 16:37 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 16:37 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 16:37 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 14:46 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 14:46 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 14:46 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 14:46 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 13:22 linux-6.6.y 79643295eba1 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 13:22 linux-6.6.y 79643295eba1 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 13:22 linux-6.6.y 79643295eba1 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
2026/09/14 13:22 linux-6.6.y 79643295eba1 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in indx_clear
* Struck through repros no longer work on HEAD.