Hello, syzbot found the following issue on: HEAD commit: 9528d418de4d Merge tag 'x86_urgent_for_v6.13' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=149252b0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d7f05e16f48c5834 dashboard link: https://syzkaller.appspot.com/bug?extid=1f18c9b1bb51239d82f2 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17808824580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=129252b0580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/00bcc6e6ccca/disk-9528d418.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9a3be632c086/vmlinux-9528d418.xz kernel image: https://storage.googleapis.com/syzbot-assets/513818683d52/bzImage-9528d418.xz The issue was bisected to: commit 4acb665cf4f3e5436844f17ece0a8a55ce688c7b Author: David Howells <dhowells@xxxxxxxxxx> Date: Fri Dec 13 13:50:08 2024 +0000 netfs: Work around recursion by abandoning retry if nothing read bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10d4b1f8580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=12d4b1f8580000 console output: https://syzkaller.appspot.com/x/log.txt?x=14d4b1f8580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1f18c9b1bb51239d82f2@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 4acb665cf4f3 ("netfs: Work around recursion by abandoning retry if nothing read") BUG: TASK stack guard page was hit at ffffc9000308ff88 (stack is ffffc90003090000..ffffc90003098000) Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5811 Comm: syz-executor387 Not tainted 6.13.0-rc7-syzkaller-00209-g9528d418de4d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:__lock_acquire+0x24/0x3c40 kernel/locking/lockdep.c:5077 Code: 90 90 90 90 90 90 41 57 41 56 41 89 f6 41 55 41 54 49 89 fc 55 89 d5 53 44 89 cb 48 81 ec f0 00 00 00 48 8b 84 24 28 01 00 00 <44> 89 04 24 48 c7 84 24 90 00 00 00 b3 8a b5 41 48 c7 84 24 98 00 RSP: 0018:ffffc9000308ff98 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8880b8644c58 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff905f7c97 R11: 0000000000000003 R12: ffff8880b8644c58 R13: ffff8880b8644c58 R14: 0000000000000000 R15: 0000000000000000 FS: 000055556c371480(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000308ff88 CR3: 0000000078d02000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <#DF> </#DF> <TASK> lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __raw_spin_trylock include/linux/spinlock_api_smp.h:90 [inline] _raw_spin_trylock+0x63/0x80 kernel/locking/spinlock.c:138 spin_trylock include/linux/spinlock.h:361 [inline] rmqueue_pcplist mm/page_alloc.c:3032 [inline] rmqueue mm/page_alloc.c:3076 [inline] get_page_from_freelist+0x350/0x2f80 mm/page_alloc.c:3473 __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+0xd7d/0x17a0 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+0x2ec/0x510 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_rpc+0x1c3/0xc10 net/9p/client.c:691 p9_client_read_once+0x24f/0x820 net/9p/client.c:1575 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 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 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 __kernel_read+0x3f1/0xb50 fs/read_write.c:523 integrity_kernel_read+0x7f/0xb0 security/integrity/iint.c:28 ima_calc_file_hash_tfm+0x2c9/0x3e0 security/integrity/ima/ima_crypto.c:480 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0x1ba/0x490 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x89f/0xa40 security/integrity/ima/ima_api.c:293 process_measurement+0x1271/0x2370 security/integrity/ima/ima_main.c:372 ima_file_check+0xbd/0x100 security/integrity/ima/ima_main.c:572 security_file_post_open+0x8e/0x210 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x1419/0x2d60 fs/namei.c:3987 do_filp_open+0x20c/0x470 fs/namei.c:4014 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe490f95c49 Code: d8 5b 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd8855d5e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe490f95c49 RDX: 0000000000020842 RSI: 000000002000c380 RDI: 00000000ffffff9c RBP: 00007fe490fdd570 R08: 00007fe490fdd5a0 R09: 00007fe490fdd5a0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe490fdd4f5 R13: 0000000000000001 R14: 00007fe491010420 R15: 0000000000000003 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0x24/0x3c40 kernel/locking/lockdep.c:5077 Code: 90 90 90 90 90 90 41 57 41 56 41 89 f6 41 55 41 54 49 89 fc 55 89 d5 53 44 89 cb 48 81 ec f0 00 00 00 48 8b 84 24 28 01 00 00 <44> 89 04 24 48 c7 84 24 90 00 00 00 b3 8a b5 41 48 c7 84 24 98 00 RSP: 0018:ffffc9000308ff98 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8880b8644c58 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff905f7c97 R11: 0000000000000003 R12: ffff8880b8644c58 R13: ffff8880b8644c58 R14: 0000000000000000 R15: 0000000000000000 FS: 000055556c371480(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000308ff88 CR3: 0000000078d02000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 41 57 push %r15 8: 41 56 push %r14 a: 41 89 f6 mov %esi,%r14d d: 41 55 push %r13 f: 41 54 push %r12 11: 49 89 fc mov %rdi,%r12 14: 55 push %rbp 15: 89 d5 mov %edx,%ebp 17: 53 push %rbx 18: 44 89 cb mov %r9d,%ebx 1b: 48 81 ec f0 00 00 00 sub $0xf0,%rsp 22: 48 8b 84 24 28 01 00 mov 0x128(%rsp),%rax 29: 00 * 2a: 44 89 04 24 mov %r8d,(%rsp) <-- trapping instruction 2e: 48 c7 84 24 90 00 00 movq $0x41b58ab3,0x90(%rsp) 35: 00 b3 8a b5 41 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 84 24 98 test %ah,(%rax,%rbx,4) --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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
