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Message-ID: <672c40a6.050a0220.350062.0287.GAE@google.com> Date: Wed, 06 Nov 2024 20:23:02 -0800 From: syzbot <syzbot+1fc6f64c40a9d143cfb6@...kaller.appspotmail.com> To: linux-kernel@...r.kernel.org, lizhi.xu@...driver.com, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [mm?] BUG: stack guard page was hit in v9fs_file_read_iter Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: stack guard page was hit in v9fs_file_read_iter BUG: TASK stack guard page was hit at ffffc9000e0e7ff8 (stack is ffffc9000e0e8000..ffffc9000e0f0000) Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 3 UID: 0 PID: 9051 Comm: syz.2.783 Not tainted 6.12.0-rc6-syzkaller-gff7afaeca1a1-dirty #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:kasan_check_range+0x1a/0x1a0 mm/kasan/generic.c:188 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 41 54 44 0f b6 c2 48 01 f0 55 <53> 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f 83 RSP: 0018:ffffc9000e0e8000 EFLAGS: 00010086 RAX: ffffc9000e0e80e8 RBX: ffffc9000e0e8088 RCX: ffffffff813d6ebe RDX: 0000000000000001 RSI: 0000000000000060 RDI: ffffc9000e0e8088 RBP: 0000000000000060 R08: 0000000000000001 R09: 0000000000000000 R10: ffff888050fd0d48 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc9000e0e8148 R14: ffffc9000e0e8088 R15: ffffc9000e0e80b0 FS: 00007fee299f36c0(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000e0e7ff8 CR3: 000000004eb82000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <#DF> </#DF> <TASK> __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 __unwind_start+0x2e/0x7f0 arch/x86/kernel/unwind_orc.c:688 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0x74/0x100 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4141 radix_tree_node_alloc.constprop.0+0x1e8/0x350 lib/radix-tree.c:253 idr_get_free+0x528/0xa40 lib/radix-tree.c:1506 idr_alloc_u32+0x191/0x2f0 lib/idr.c:46 idr_alloc+0xc1/0x130 lib/idr.c:87 p9_tag_alloc+0x394/0x870 net/9p/client.c:321 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+0x115/0x310 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+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235 netfs_rreq_assess+0x5eb/0x890 fs/netfs/read_collect.c:372 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:408 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 do_iter_readv_writev+0x614/0x7f0 fs/read_write.c:832 vfs_readv+0x4cf/0x890 fs/read_write.c:1025 do_preadv fs/read_write.c:1142 [inline] __do_sys_preadv fs/read_write.c:1192 [inline] __se_sys_preadv fs/read_write.c:1187 [inline] __x64_sys_preadv+0x22d/0x310 fs/read_write.c:1187 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: 0033:0x7fee28b7e719 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:00007fee299f3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007fee28d36058 RCX: 00007fee28b7e719 RDX: 0000000000000001 RSI: 00000000200015c0 RDI: 0000000000000003 RBP: 00007fee28bf139e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fee28d36058 R15: 00007fffcb1ce608 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_check_range+0x1a/0x1a0 mm/kasan/generic.c:188 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 41 54 44 0f b6 c2 48 01 f0 55 <53> 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f 83 RSP: 0018:ffffc9000e0e8000 EFLAGS: 00010086 RAX: ffffc9000e0e80e8 RBX: ffffc9000e0e8088 RCX: ffffffff813d6ebe RDX: 0000000000000001 RSI: 0000000000000060 RDI: ffffc9000e0e8088 RBP: 0000000000000060 R08: 0000000000000001 R09: 0000000000000000 R10: ffff888050fd0d48 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc9000e0e8148 R14: ffffc9000e0e8088 R15: ffffc9000e0e80b0 FS: 00007fee299f36c0(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000e0e7ff8 CR3: 000000004eb82000 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: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 66 0f 1f 00 nopw (%rax) 14: 48 85 f6 test %rsi,%rsi 17: 0f 84 50 01 00 00 je 0x16d 1d: 48 89 f8 mov %rdi,%rax 20: 41 54 push %r12 22: 44 0f b6 c2 movzbl %dl,%r8d 26: 48 01 f0 add %rsi,%rax 29: 55 push %rbp * 2a: 53 push %rbx <-- trapping instruction 2b: 0f 82 c6 00 00 00 jb 0xf7 31: 48 b8 ff ff ff ff ff movabs $0xffff7fffffffffff,%rax 38: 7f ff ff 3b: 48 39 f8 cmp %rdi,%rax 3e: 0f .byte 0xf 3f: 83 .byte 0x83 Tested on: commit: ff7afaec Merge tag 'nfs-for-6.12-3' of git://git.linux.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15134d87980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c0b2fb415081f288 dashboard link: https://syzkaller.appspot.com/bug?extid=1fc6f64c40a9d143cfb6 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=14f73d5f980000
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