syzkaller login: [ 31.028872] BUG: Bad rss-counter state mm:000000004cb1dea2 type:MM_FILEPAGES val:33 [ 31.029880] BUG: Bad rss-counter state mm:000000004cb1dea2 type:MM_ANONPAGES val:22 [ 31.209956] ================================================================== [ 31.211096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.212419] Read of size 8 at addr ffff888019ab4c20 by task sshd/222 [ 31.213375] [ 31.213638] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.214678] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.215860] Call Trace: [ 31.216244] [ 31.216594] dump_stack_lvl+0x91/0xf0 [ 31.217190] print_report+0xcc/0x620 [ 31.217808] ? __virt_addr_valid+0x102/0x340 [ 31.218429] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219078] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219710] kasan_report+0xbe/0xf0 [ 31.220205] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220831] vma_interval_tree_remove+0xc75/0xec0 [ 31.221446] vma_prepare+0xc54/0x11a0 [ 31.221929] __split_vma+0x5af/0x950 [ 31.222402] ? __pfx___split_vma+0x10/0x10 [ 31.222938] ? find_held_lock+0x2c/0x110 [ 31.223465] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.224040] ? lock_is_held_type+0x9f/0x120 [ 31.224591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.225226] ? mtree_range_walk+0x632/0x900 [ 31.225803] ? mas_walk+0x5c7/0x7c0 [ 31.226301] do_vmi_munmap+0x1f1/0x2b0 [ 31.226797] mmap_region+0x1f9/0x2660 [ 31.227280] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.227790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.228499] ? __pfx_lock_acquire+0x10/0x10 [ 31.229032] ? __pfx_mmap_region+0x10/0x10 [ 31.229572] ? security_mmap_addr+0x7d/0xa0 [ 31.230108] ? get_unmapped_area+0x1f5/0x3f0 [ 31.230670] do_mmap+0x854/0xf00 [ 31.231117] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.231623] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.232188] ksys_mmap_pgoff+0x3af/0x500 [ 31.232693] do_syscall_64+0x3f/0x90 [ 31.233166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233823] RIP: 0033:0x7fce6bcb5d82 [ 31.234274] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.236384] RSP: 002b:00007fffc6fab7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.237284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce6bcb5d82 [ 31.238131] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce6b0ef000 [ 31.238993] RBP: 00007fce6b0ef000 R08: 0000000000000009 R09: 0000000000001000 [ 31.239846] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558aa8b4980 [ 31.240714] R13: 00007fffc6fab7f0 R14: 00007fffc6fab820 R15: 00007fffc6fabb80 [ 31.241596] [ 31.241887] [ 31.242111] Allocated by task 215: [ 31.242539] kasan_save_stack+0x22/0x50 [ 31.243049] kasan_set_track+0x25/0x30 [ 31.243544] __kasan_slab_alloc+0x59/0x70 [ 31.244078] kmem_cache_alloc+0x16b/0x370 [ 31.244601] vm_area_dup+0x20/0x160 [ 31.245050] __split_vma+0x170/0x950 [ 31.245524] split_vma+0xc6/0x110 [ 31.245965] mprotect_fixup+0x8d2/0xb30 [ 31.246469] do_mprotect_pkey+0x87e/0xd40 [ 31.246983] __x64_sys_mprotect+0x78/0xc0 [ 31.247501] do_syscall_64+0x3f/0x90 [ 31.247971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248612] [ 31.248824] Freed by task 13: [ 31.249201] kasan_save_stack+0x22/0x50 [ 31.249725] kasan_set_track+0x25/0x30 [ 31.250214] kasan_save_free_info+0x2b/0x50 [ 31.250742] __kasan_slab_free+0x10a/0x190 [ 31.251268] kmem_cache_free+0x10d/0x4d0 [ 31.251774] rcu_core+0x8c8/0x2860 [ 31.252213] __do_softirq+0x1b7/0x7d4 [ 31.252695] [ 31.252989] Last potentially related work creation: [ 31.253590] kasan_save_stack+0x22/0x50 [ 31.254087] __kasan_record_aux_stack+0x8e/0xa0 [ 31.254653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.255289] remove_vma+0x139/0x170 [ 31.255735] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.256296] do_vmi_munmap+0x1f1/0x2b0 [ 31.256782] __vm_munmap+0x138/0x3a0 [ 31.257249] __x64_sys_munmap+0x59/0x80 [ 31.257755] do_syscall_64+0x3f/0x90 [ 31.258225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.258864] [ 31.259081] The buggy address belongs to the object at ffff888019ab4bc8 [ 31.259081] which belongs to the cache vm_area_struct of size 168 [ 31.260557] The buggy address is located 88 bytes inside of [ 31.260557] freed 168-byte region [ffff888019ab4bc8, ffff888019ab4c70) [ 31.262008] [ 31.262229] The buggy address belongs to the physical page: [ 31.262900] page:0000000056f4b157 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ab4 [ 31.263993] memcg:ffff88800fc05a01 [ 31.264421] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.265066] page_type: 0xffffffff() [ 31.265546] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.266474] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc05a01 [ 31.267398] page dumped because: kasan: bad access detected [ 31.268080] [ 31.268299] Memory state around the buggy address: [ 31.268886] ffff888019ab4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.269797] ffff888019ab4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.270682] >ffff888019ab4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.271547] ^ [ 31.272115] ffff888019ab4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.273019] ffff888019ab4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.273913] ================================================================== [ 31.274960] Disabling lock debugging due to kernel taint [ 33.177066] BUG: Bad rss-counter state mm:000000000b1dc47a type:MM_FILEPAGES val:33 [ 33.177829] BUG: Bad rss-counter state mm:000000000b1dc47a type:MM_ANONPAGES val:22 [ 33.569438] BUG: Bad rss-counter state mm:000000008a2f500f type:MM_FILEPAGES val:33 [ 33.570428] BUG: Bad rss-counter state mm:000000008a2f500f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37655' (ECDSA) to the list of known hosts. 2023/06/20 19:24:43 fuzzer started 2023/06/20 19:24:43 dialing manager at localhost:36067 2023/06/20 19:24:43 checking machine... 2023/06/20 19:24:43 checking revisions... [ 34.302362] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:24:44 testing simple program... [ 34.345326] cgroup: Unknown subsys name 'net' [ 34.397219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:24:43 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000002 RCX=ffffffff813782f7 RDX=0000000000000003 RSI=ffffffff860d2fd0 RDI=ffffffff85dba0f4 RBP=ffff88806ce09ac8 RSP=ffff88806ce099d0 R8 =ffffffff860d2fd0 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fdcc R12=ffffffff85dba0fc R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8112fc20 RFL=00000206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5769786900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f5769d3b650 CR3=000000000f58c000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00007f0e8d8dbc64 RCX=ffffffff864bbb54 RDX=1ffff1100205de4e RSI=0000000000000000 RDI=00007f0e8d8dbc64 RBP=00007f0e8d8dbc64 RSP=ffff8880102ef1a0 R8 =ffffffff864bbb58 R9 =ffff8880102ef258 R10=0000000000038001 R11=00000000000b6a61 R12=ffff8880102ef2e0 R13=0000000000000000 R14=ffff888014658000 R15=0000000000092cc0 RIP=ffffffff81007b48 RFL=00000203 [------C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0e8d022900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f0e8c446260 CR3=0000000010206000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6122cbf5376d088c00000000000ae988 XMM05=6627f813cf7144a60000000000132f68 XMM06=5ffc950f0f2d919c0000000000131d08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000