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Mon, 20 Jan 2025 08:49:25 -0800 (PST) Date: Mon, 20 Jan 2025 08:49:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <678e7e95.050a0220.303755.007d.GAE@google.com> Subject: [syzbot] [v9fs?] BUG: stack guard page was hit in loop_process_work From: syzbot To: akpm@linux-foundation.org, asmadeus@codewreck.org, ericvh@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lucho@ionkov.net, syzkaller-bugs@googlegroups.com, v9fs@lists.linux.dev Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: C8CD718000A X-Stat-Signature: n4bnj33hyg74irmsdgea84gof3563rrj X-Rspam-User: X-HE-Tag: 1737391766-225106 X-HE-Meta: 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 V4KcRsks 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 qMNxEHK6 6C11Ixs7yBqyv7nprajQUSm/GrjpR9i8Q/Oez6LeCHB+O2rLCIOpRCwe3hDXBH9/6xoUgyVrUclIL+Xbid0gIqhWCFccGptd40iSBlbF70MJn6lcwXoPxYtHn0+S88zjy+K8fyrwZRuq07GFvLI92tXGkCBPAmCWvoF7vFoEeH5Gz+EXwLr8rHO9TLmg108jejpoG1m8sdaoWpUxjfAmyI/1FhXhFWLnxdQLGexl8hv11zXe2fXoiiT8OHL0B+1Gt/wC7ZLlfKiv93UXomECuDvscjsOwsfsISPKqXBTnDAUzyydHZ8d3o49soASgdzJA6TB1exnJ/TTv1P8ejo7HhEQXjWYId1C3nihBBGU5EmQdS/UAC/U7g== 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: 619f0b6fad52 Merge tag 'seccomp-v6.13-rc8' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14bbfcb0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f5e182416a4b418f dashboard link: https://syzkaller.appspot.com/bug?extid=1fc139801105ed807f06 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 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-619f0b6f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bc1185951a22/vmlinux-619f0b6f.xz kernel image: https://storage.googleapis.com/syzbot-assets/1f614d80b6c2/bzImage-619f0b6f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1fc139801105ed807f06@syzkaller.appspotmail.com BUG: TASK stack guard page was hit at ffffc900001dffc8 (stack is ffffc900001e0000..ffffc900001e8000) Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 2 UID: 0 PID: 12 Comm: kworker/u32:1 Not tainted 6.13.0-rc7-syzkaller-00043-g619f0b6fad52 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: loop8 loop_workfn RIP: 0010:mark_lock+0xb0/0xc60 kernel/locking/lockdep.c:4727 Code: fe 09 0f 87 e3 00 00 00 41 83 fe 08 49 89 fc 48 89 f3 0f 84 97 00 00 00 41 bd 01 00 00 00 44 89 f1 41 d3 e5 4d 63 ed 48 89 df 1b 6b ff ff 48 ba 00 00 00 00 00 fc ff df 48 8d 78 60 48 89 f9 RSP: 0018:ffffc900001dffd0 EFLAGS: 00010002 RAX: 0000000000000000 RBX: ffff88801ca953d8 RCX: 0000000000000004 RDX: 0000000000000002 RSI: ffff88801ca953d8 RDI: ffff88801ca953d8 RBP: ffffc900001e0108 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff969b9e27 R11: 00000000000254be R12: ffff88801ca94880 R13: 0000000000000200 R14: 0000000000000009 R15: 1ffff9200003c000 FS: 0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900001dffc8 CR3: 0000000058ec0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <#DF> mark_usage kernel/locking/lockdep.c:4670 [inline] __lock_acquire+0x9f1/0x3c40 kernel/locking/lockdep.c:5180 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 rcu_lock_acquire include/linux/rcupdate.h:337 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] page_ext_get+0x3a/0x310 mm/page_ext.c:525 __set_page_owner+0x9a/0x790 mm/page_owner.c:322 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x2c8/0x620 mm/mempolicy.c:2269 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2c9/0x410 mm/slub.c:2642 ___slab_alloc+0xce2/0x1650 mm/slub.c:3830 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_noprof+0x2de/0x4f0 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] p9_fcall_init+0x97/0x260 net/9p/client.c:233 p9_tag_alloc+0x17a/0x870 net/9p/client.c:298 p9_client_prepare_req+0x19f/0x4d0 net/9p/client.c:644 p9_client_zc_rpc.constprop.0+0x105/0x880 net/9p/client.c:793 p9_client_read_once+0x443/0x820 net/9p/client.c:1570 p9_client_read+0x13f/0x1b0 net/9p/client.c:1534 v9fs_issue_read+0x115/0x340 fs/9p/vfs_addr.c:76 netfs_retry_read_subrequests fs/netfs/read_retry.c:62 [inline] netfs_retry_reads+0x1512/0x1d40 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 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fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x15a4/0x1d40 fs/netfs/read_retry.c:238 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_dispatch_unbuffered_reads fs/netfs/direct_read.c:103 [inline] netfs_unbuffered_read fs/netfs/direct_read.c:127 [inline] netfs_unbuffered_read_iter_locked+0x12e1/0x19a0 fs/netfs/direct_read.c:221 netfs_unbuffered_read_iter+0xc5/0x100 fs/netfs/direct_read.c:256 v9fs_file_read_iter+0xbf/0x100 fs/9p/vfs_file.c:361 lo_rw_aio.isra.0+0x90a/0xcc0 drivers/block/loop.c:470 do_req_filebacked drivers/block/loop.c:514 [inline] loop_handle_cmd drivers/block/loop.c:1909 [inline] loop_process_work+0xa65/0x2000 drivers/block/loop.c:1944 process_one_work+0x958/0x1b30 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mark_lock+0xb0/0xc60 kernel/locking/lockdep.c:4727 Code: fe 09 0f 87 e3 00 00 00 41 83 fe 08 49 89 fc 48 89 f3 0f 84 97 00 00 00 41 bd 01 00 00 00 44 89 f1 41 d3 e5 4d 63 ed 48 89 df 1b 6b ff ff 48 ba 00 00 00 00 00 fc ff df 48 8d 78 60 48 89 f9 RSP: 0018:ffffc900001dffd0 EFLAGS: 00010002 RAX: 0000000000000000 RBX: ffff88801ca953d8 RCX: 0000000000000004 RDX: 0000000000000002 RSI: ffff88801ca953d8 RDI: ffff88801ca953d8 RBP: ffffc900001e0108 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff969b9e27 R11: 00000000000254be R12: ffff88801ca94880 R13: 0000000000000200 R14: 0000000000000009 R15: 1ffff9200003c000 FS: 0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900001dffc8 CR3: 0000000058ec0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: fe 09 decb (%rcx) 2: 0f 87 e3 00 00 00 ja 0xeb 8: 41 83 fe 08 cmp $0x8,%r14d c: 49 89 fc mov %rdi,%r12 f: 48 89 f3 mov %rsi,%rbx 12: 0f 84 97 00 00 00 je 0xaf 18: 41 bd 01 00 00 00 mov $0x1,%r13d 1e: 44 89 f1 mov %r14d,%ecx 21: 41 d3 e5 shl %cl,%r13d 24: 4d 63 ed movslq %r13d,%r13 27: 48 89 df mov %rbx,%rdi * 2a: e8 1b 6b ff ff call 0xffff6b4a <-- trapping instruction 2f: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 36: fc ff df 39: 48 8d 78 60 lea 0x60(%rax),%rdi 3d: 48 89 f9 mov %rdi,%rcx --- 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