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Sat, 04 Jan 2025 04:25:25 -0800 (PST) Date: Sat, 04 Jan 2025 04:25:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <677928b5.050a0220.3b53b0.004d.GAE@google.com> Subject: [syzbot] [mm?] kernel BUG in alloc_hugetlb_folio_reserve From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, muchun.song@linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 612A0140002 X-Stat-Signature: fyhxy1axqgys9f56rdowskxpk8sqsory X-Rspam-User: X-HE-Tag: 1735993526-152104 X-HE-Meta: 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 Z3oY0fDE 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 Ehs/eaBm Kieq+Fha9cMs7+UxSBS+UC9njia4CIDJ+WjUoJnGQvfQgh6/MS8qQHuromRBb3g5HJXCy8VJJUR/fAvefGfULfG4yam7/gGyEx8OTdF+pqY+w3Pge1qc5G+0oFNtWsdL2YxfD14Wc/qYre7uYIxRTPgf01QyjVQvmgjEDRG5PF7HYv+jwNaLYct1WSuCoIg3SFNdwiWKr1uVFsxX/VFO5EbuB6GD/9Wk/f7bA5YGDox/D1VYUB3IIpN9njN7hwq803XuoMfgAzH9itAgqZrNnme8SdBvvhJEjuGNxLZDGCQa08okEp4oO5eqILtSgu1nysZMWGlNWsX/YXKjgpTekpqjyJu41rR75Q5xd1itgPxIVAW9xgjHUtZmAz2W6NdaQ281uQftz1rWo+SFf0QgJNOGUVARhxz/ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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@syzkaller.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: 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 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@googlegroups.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