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* [syzbot] [mm?] kernel BUG in truncate_inode_partial_folio
@ 2023-04-24 11:33 syzbot
  0 siblings, 0 replies; only message in thread
From: syzbot @ 2023-04-24 11:33 UTC (permalink / raw)
  To: akpm, hughd, linux-kernel, linux-mm, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    d3e1ee0e67e7 Add linux-next specific files for 20230421
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=132ceedbc80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=53c789efbcc06cf6
dashboard link: https://syzkaller.appspot.com/bug?extid=77184b5e843d90d56ec1
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c558a9e1fe6a/disk-d3e1ee0e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2ec100a34c4c/vmlinux-d3e1ee0e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1afcd9936dc1/bzImage-d3e1ee0e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+77184b5e843d90d56ec1@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at include/linux/highmem.h:275!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6335 Comm: syz-executor.2 Not tainted 6.3.0-rc7-next-20230421-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:zero_user_segments include/linux/highmem.h:275 [inline]
RIP: 0010:folio_zero_range include/linux/highmem.h:507 [inline]
RIP: 0010:truncate_inode_partial_folio+0x2f1/0x750 mm/truncate.c:237
Code: 45 16 cf ff 8b 04 24 83 f8 3f 0f 87 a5 f4 4c 08 e8 14 1a cf ff 4c 89 ee 4c 89 f7 e8 c9 15 cf ff 4d 39 ee 76 07 e8 ff 19 cf ff <0f> 0b e8 f8 19 cf ff be 08 00 00 00 48 89 ef e8 6b ff 21 00 48 89
RSP: 0018:ffffc900038af6b8 EFLAGS: 00010216
RAX: 000000000003db56 RBX: 00000000fff9e000 RCX: ffffc90010241000
RDX: 0000000000040000 RSI: ffffffff81b4cb51 RDI: 0000000000000006
RBP: ffffea00024e0000 R08: 0000000000000006 R09: 00000000fff9e000
R10: 0000000000200000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000200000 R14: 00000000fff9e000 R15: 0000000000000009
FS:  00007fcf4ef5f700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3dcd3f21c0 CR3: 000000007736f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 shmem_undo_range+0xb82/0x1240 mm/shmem.c:1039
 shmem_truncate_range mm/shmem.c:1067 [inline]
 shmem_fallocate+0xb80/0xef0 mm/shmem.c:3061
 vfs_fallocate+0x48b/0xe40 fs/open.c:324
 madvise_remove mm/madvise.c:989 [inline]
 madvise_vma_behavior+0xa59/0x20a0 mm/madvise.c:1013
 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1248
 do_madvise.part.0+0x287/0x5e0 mm/madvise.c:1428
 do_madvise mm/madvise.c:1441 [inline]
 __do_sys_madvise mm/madvise.c:1441 [inline]
 __se_sys_madvise mm/madvise.c:1439 [inline]
 __x64_sys_madvise+0x117/0x150 mm/madvise.c:1439
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fcf4e28c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcf4ef5f168 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fcf4e3ac1f0 RCX: 00007fcf4e28c169
RDX: 0000000000000009 RSI: 0000000000200000 RDI: 000000002019e000
RBP: 00007fcf4e2e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc789c175f R14: 00007fcf4ef5f300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:zero_user_segments include/linux/highmem.h:275 [inline]
RIP: 0010:folio_zero_range include/linux/highmem.h:507 [inline]
RIP: 0010:truncate_inode_partial_folio+0x2f1/0x750 mm/truncate.c:237
Code: 45 16 cf ff 8b 04 24 83 f8 3f 0f 87 a5 f4 4c 08 e8 14 1a cf ff 4c 89 ee 4c 89 f7 e8 c9 15 cf ff 4d 39 ee 76 07 e8 ff 19 cf ff <0f> 0b e8 f8 19 cf ff be 08 00 00 00 48 89 ef e8 6b ff 21 00 48 89
RSP: 0018:ffffc900038af6b8 EFLAGS: 00010216
RAX: 000000000003db56 RBX: 00000000fff9e000 RCX: ffffc90010241000
RDX: 0000000000040000 RSI: ffffffff81b4cb51 RDI: 0000000000000006
RBP: ffffea00024e0000 R08: 0000000000000006 R09: 00000000fff9e000
R10: 0000000000200000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000200000 R14: 00000000fff9e000 R15: 0000000000000009
FS:  00007fcf4ef5f700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3b1f50ea70 CR3: 000000007736f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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2023-04-24 11:33 [syzbot] [mm?] kernel BUG in truncate_inode_partial_folio syzbot

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