------------[ cut here ]------------ WARNING: CPU: 2 PID: 8976 at mm/page_alloc.c:4729 __alloc_pages_noprof+0x1f66/0x2470 mm/page_alloc.c:4729 Modules linked in: CPU: 2 UID: 0 PID: 8976 Comm: syz.4.821 Not tainted 6.13.0-syzkaller-07078-gb46c89c08f41 #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_pages_noprof+0x1f66/0x2470 mm/page_alloc.c:4729 Code: 24 38 41 89 c6 0f b6 c0 44 8b ac 24 84 00 00 00 89 44 24 18 e9 a8 f7 ff ff 90 0f 0b 90 e9 b6 f7 ff ff c6 05 15 2e 39 0e 01 90 <0f> 0b 90 e9 d9 e4 ff ff 90 0f 0b 90 e9 4e fb ff ff 83 bc 24 80 00 RSP: 0018:ffffc900077df8f8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000032 RDI: 0000000000040d40 RBP: 3539303733007800 R08: 0000000000000007 R09: 0000000000000000 R10: 3539303733007800 R11: 0000000000000001 R12: 0000000000000032 R13: 1ffff92000efbf33 R14: 3539303733007800 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802b600000(0063) knlGS:00000000f50f6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020001000 CR3: 000000002b76e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] ___kmalloc_large_node+0x84/0x1b0 mm/slub.c:4243 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:4270 __do_kmalloc_node mm/slub.c:4286 [inline] __kmalloc_noprof.cold+0xc/0x63 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] v9fs_fid_get_acl+0x7a/0x120 fs/9p/acl.c:32 __v9fs_get_acl fs/9p/acl.c:66 [inline] v9fs_get_acl+0xee/0x530 fs/9p/acl.c:92 v9fs_qid_iget_dotl fs/9p/vfs_inode_dotl.c:131 [inline] v9fs_inode_from_fid_dotl+0x264/0x2f0 fs/9p/vfs_inode_dotl.c:154 v9fs_get_new_inode_from_fid fs/9p/v9fs.h:251 [inline] v9fs_mount+0x4fe/0xa30 fs/9p/vfs_super.c:142 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8b/0x340 fs/super.c:1814 do_new_mount fs/namespace.c:3560 [inline] path_mount+0x6e1/0x1f00 fs/namespace.c:3887 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount fs/namespace.c:4088 [inline] __ia32_sys_mount+0x28d/0x310 fs/namespace.c:4088 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: 0023:0xf746e579 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:00000000f50f655c EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200003c0 RDX: 0000000020000b80 RSI: 0000000000000000 RDI: 0000000020000500 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi