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Message-ID: <IA0PR11MB7185EF0C879CC2CF3BA2FC77F8112@IA0PR11MB7185.namprd11.prod.outlook.com> Date: Tue, 7 Jan 2025 01:07:01 +0000 From: "Kasireddy, Vivek" <vivek.kasireddy@...el.com> To: syzbot <syzbot+a504cb5bae4fe117ba94@...kaller.appspotmail.com>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "muchun.song@...ux.dev" <muchun.song@...ux.dev>, "syzkaller-bugs@...glegroups.com" <syzkaller-bugs@...glegroups.com> Subject: RE: [syzbot] [mm?] kernel BUG in alloc_hugetlb_folio_reserve > > Hello, > > syzbot found the following issue on: > > HEAD commit: 63676eefb7a0 Merge tag 'sched_ext-for-6.13-rc5-fixes' of g.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=15fb66f8580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=1c541fa8af5c9cc7 > dashboard link: > https://syzkaller.appspot.com/bug?extid=a504cb5bae4fe117ba94 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) > 2.40 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot- > assets/7feb34a89c2a/non_bootable_disk-63676eef.raw.xz > vmlinux: https://storage.googleapis.com/syzbot- > assets/599e1a07ba5c/vmlinux-63676eef.xz > kernel image: https://storage.googleapis.com/syzbot- > assets/b52f3534bdbe/bzImage-63676eef.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+a504cb5bae4fe117ba94@...kaller.appspotmail.com > > ------------[ cut here ]------------ > kernel BUG at mm/hugetlb.c:2403! > Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI > CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller- > 00161-g63676eefb7a0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, > 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 > RIP: 0010:alloc_hugetlb_folio_reserve+0xbc/0xc0 mm/hugetlb.c:2403 > Code: 1f eb 05 e8 56 18 a0 ff 48 c7 c7 40 56 61 8e e8 ba 21 cc 09 4c 89 f0 5b 41 > 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 35 18 a0 ff 90 <0f> 0b 66 90 90 90 90 90 90 > 90 90 90 90 90 90 90 90 90 90 90 f3 0f > RSP: 0018:ffffc9000d3d77f8 EFLAGS: 00010087 > RAX: ffffffff81ff6beb RBX: 0000000000000000 RCX: 0000000000100000 > RDX: ffffc9000e51a000 RSI: 00000000000003ec RDI: 00000000000003ed > RBP: 1ffffffff34810d9 R08: ffffffff81ff6ba3 R09: 1ffffd4000093005 > R10: dffffc0000000000 R11: fffff94000093006 R12: dffffc0000000000 > R13: dffffc0000000000 R14: ffffea0000498000 R15: ffffffff9a4086c8 > FS: 00007f77ac12e6c0(0000) GS:ffff88801fc00000(0000) > knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f77ab54b170 CR3: 0000000040b70000 CR4: 0000000000352ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call > Trace: > <TASK> > memfd_alloc_folio+0x1bd/0x370 mm/memfd.c:88 > memfd_pin_folios+0xf10/0x1570 mm/gup.c:3750 udmabuf_pin_folios > drivers/dma-buf/udmabuf.c:346 [inline] > udmabuf_create+0x70e/0x10c0 drivers/dma-buf/udmabuf.c:443 > udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:495 [inline] > udmabuf_ioctl+0x301/0x4e0 drivers/dma-buf/udmabuf.c:526 vfs_ioctl > fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] > __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f77ab385d29 > Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f77ac12e038 EFLAGS: 00000246 ORIG_RAX: > 0000000000000010 > RAX: ffffffffffffffda RBX: 00007f77ab575fa0 RCX: 00007f77ab385d29 > RDX: 0000000020000040 RSI: 0000000040187542 RDI: 0000000000000006 > RBP: 00007f77ab401b08 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 0000000000000000 R14: 00007f77ab575fa0 R15: 00007fff748b7238 > </TASK> Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:alloc_hugetlb_folio_reserve+0xbc/0xc0 mm/hugetlb.c:2403 > Code: 1f eb 05 e8 56 18 a0 ff 48 c7 c7 40 56 61 8e e8 ba 21 cc 09 4c 89 f0 5b 41 > 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 35 18 a0 ff 90 <0f> 0b 66 90 90 90 90 90 90 > 90 90 90 90 90 90 90 90 90 90 90 f3 0f > RSP: 0018:ffffc9000d3d77f8 EFLAGS: 00010087 > RAX: ffffffff81ff6beb RBX: 0000000000000000 RCX: 0000000000100000 > RDX: ffffc9000e51a000 RSI: 00000000000003ec RDI: 00000000000003ed > RBP: 1ffffffff34810d9 R08: ffffffff81ff6ba3 R09: 1ffffd4000093005 > R10: dffffc0000000000 R11: fffff94000093006 R12: dffffc0000000000 > R13: dffffc0000000000 R14: ffffea0000498000 R15: ffffffff9a4086c8 > FS: 00007f77ac12e6c0(0000) GS:ffff88801fc00000(0000) > knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f77ab54b170 CR3: 0000000040b70000 CR4: 0000000000352ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@...glegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup #syz test: https://gitlab.freedesktop.org/Vivek/drm-tip.git syzbot_fix_htlb_reserve
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