Hello, syzbot found the following issue on: HEAD commit: 27cc6fdf7201 Merge tag 'linux_kselftest-fixes-6.12-rc2' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13043307980000 kernel config: https://syzkaller.appspot.com/x/.config?x=e3e4d87a80ed4297 dashboard link: https://syzkaller.appspot.com/bug?extid=0e1748603cc9f2dfc87d 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-27cc6fdf.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ae2f7d656e32/vmlinux-27cc6fdf.xz kernel image: https://storage.googleapis.com/syzbot-assets/1b06a62cc1e5/bzImage-27cc6fdf.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0e1748603cc9f2dfc87d@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: TASK stack guard page was hit at ffffc90002b3ffb8 (stack is ffffc90002b40000..ffffc90002b48000) Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 12425 Comm: syz.2.2179 Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #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:mark_lock+0x25/0xc60 kernel/locking/lockdep.c:4686 Code: 90 90 90 90 90 55 48 89 e5 41 57 41 56 41 89 d6 48 ba 00 00 00 00 00 fc ff df 41 55 41 54 53 48 83 e4 f0 48 81 ec 10 01 00 00 <48> c7 44 24 30 b3 8a b5 41 48 8d 44 24 30 48 c7 44 24 38 38 51 57 RSP: 0018:ffffc90002b3ffc0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000003 RDX: dffffc0000000000 RSI: ffff888021edaf98 RDI: ffff888021eda440 RBP: ffffc90002b40100 R08: 0000000000000000 R09: 0000000000000006 R10: ffffffff9698ad37 R11: 0000000000000002 R12: dffffc0000000000 R13: ffff888021edaf98 R14: 0000000000000008 R15: ffff888021eda440 FS: 0000000000000000(0000) GS:ffff88802b400000(0063) knlGS:00000000f56f6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffc90002b3ffb8 CR3: 000000005f61e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <#DF> </#DF> <TASK> mark_usage kernel/locking/lockdep.c:4646 [inline] __lock_acquire+0x906/0x3ce0 kernel/locking/lockdep.c:5156 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 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:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x101e/0x3070 mm/page_alloc.c:3457 __alloc_pages_noprof+0x223/0x25c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265 alloc_slab_page mm/slub.c:2412 [inline] allocate_slab mm/slub.c:2578 [inline] new_slab+0x2ba/0x3f0 mm/slub.c:2631 ___slab_alloc+0xd1d/0x16f0 mm/slub.c:3818 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] kmem_cache_alloc_noprof+0x2ae/0x2f0 mm/slub.c:4141 p9_tag_alloc+0x9c/0x870 net/9p/client.c:281 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:1560 p9_client_read+0x13f/0x1b0 net/9p/client.c:1524 v9fs_issue_read+0x115/0x310 fs/9p/vfs_addr.c:74 netfs_retry_read_subrequests fs/netfs/read_retry.c:60 [inline] netfs_retry_reads+0x153a/0x1d00 fs/netfs/read_retry.c:232 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:369 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:405 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+0x12f6/0x19b0 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:527 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+0x8a7/0xa10 security/integrity/ima/ima_api.c:293 process_measurement+0x1271/0x2370 security/integrity/ima/ima_main.c:372 ima_file_check+0xc1/0x110 security/integrity/ima/ima_main.c:572 security_file_post_open+0x8e/0x210 security/security.c:3127 do_open fs/namei.c:3776 [inline] path_openat+0x1419/0x2d60 fs/namei.c:3933 do_filp_open+0x1dc/0x430 fs/namei.c:3960 do_sys_openat2+0x17a/0x1e0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_compat_sys_open fs/open.c:1481 [inline] __se_compat_sys_open fs/open.c:1479 [inline] __ia32_compat_sys_open+0x147/0x1e0 fs/open.c:1479 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf740e579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f56f656c EFLAGS: 00000296 ORIG_RAX: 0000000000000005 RAX: ffffffffffffffda RBX: 0000000020000240 RCX: 0000000000000b00 RDX: 0000000000000008 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mark_lock+0x25/0xc60 kernel/locking/lockdep.c:4686 Code: 90 90 90 90 90 55 48 89 e5 41 57 41 56 41 89 d6 48 ba 00 00 00 00 00 fc ff df 41 55 41 54 53 48 83 e4 f0 48 81 ec 10 01 00 00 <48> c7 44 24 30 b3 8a b5 41 48 8d 44 24 30 48 c7 44 24 38 38 51 57 RSP: 0018:ffffc90002b3ffc0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000003 RDX: dffffc0000000000 RSI: ffff888021edaf98 RDI: ffff888021eda440 RBP: ffffc90002b40100 R08: 0000000000000000 R09: 0000000000000006 R10: ffffffff9698ad37 R11: 0000000000000002 R12: dffffc0000000000 R13: ffff888021edaf98 R14: 0000000000000008 R15: ffff888021eda440 FS: 0000000000000000(0000) GS:ffff88802b400000(0063) knlGS:00000000f56f6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffc90002b3ffb8 CR3: 000000005f61e000 CR4: 0000000000352ef0 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: 55 push %rbp 6: 48 89 e5 mov %rsp,%rbp 9: 41 57 push %r15 b: 41 56 push %r14 d: 41 89 d6 mov %edx,%r14d 10: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 17: fc ff df 1a: 41 55 push %r13 1c: 41 54 push %r12 1e: 53 push %rbx 1f: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp 23: 48 81 ec 10 01 00 00 sub $0x110,%rsp * 2a: 48 c7 44 24 30 b3 8a movq $0x41b58ab3,0x30(%rsp) <-- trapping instruction 31: b5 41 33: 48 8d 44 24 30 lea 0x30(%rsp),%rax 38: 48 rex.W 39: c7 .byte 0xc7 3a: 44 24 38 rex.R and $0x38,%al 3d: 38 51 57 cmp %dl,0x57(%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@xxxxxxxxxxxxxxxx. 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
