syzkaller login: [ 31.335670] BUG: Bad rss-counter state mm:0000000021af3459 type:MM_FILEPAGES val:33 [ 31.336877] BUG: Bad rss-counter state mm:0000000021af3459 type:MM_ANONPAGES val:22 [ 31.374532] ================================================================== [ 31.375691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.376855] Read of size 8 at addr ffff888019ec2310 by task sshd/221 [ 31.377691] [ 31.377978] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.378992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.380073] Call Trace: [ 31.380422] [ 31.380730] dump_stack_lvl+0x91/0xf0 [ 31.381272] print_report+0xcc/0x620 [ 31.381788] ? __virt_addr_valid+0x102/0x340 [ 31.382384] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.383054] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.383736] kasan_report+0xbe/0xf0 [ 31.384260] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.384945] vma_interval_tree_remove+0xc75/0xec0 [ 31.385613] vma_prepare+0xc54/0x11a0 [ 31.386143] __split_vma+0x5af/0x950 [ 31.386660] ? __pfx___split_vma+0x10/0x10 [ 31.387245] ? find_held_lock+0x2c/0x110 [ 31.387821] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.388440] ? lock_is_held_type+0x9f/0x120 [ 31.389037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.389711] ? mtree_range_walk+0x632/0x900 [ 31.390320] ? mas_walk+0x5c7/0x7c0 [ 31.390847] do_vmi_munmap+0x1f1/0x2b0 [ 31.391391] mmap_region+0x1f9/0x2660 [ 31.391942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.392506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.393293] ? __pfx_lock_acquire+0x10/0x10 [ 31.393913] ? __pfx_mmap_region+0x10/0x10 [ 31.394501] ? security_mmap_addr+0x7d/0xa0 [ 31.395151] ? get_unmapped_area+0x1f5/0x3f0 [ 31.395768] do_mmap+0x854/0xf00 [ 31.396250] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.396802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.397426] ksys_mmap_pgoff+0x3af/0x500 [ 31.397981] do_syscall_64+0x3f/0x90 [ 31.398517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399261] RIP: 0033:0x7f477b7a5d82 [ 31.399783] 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 [ 31.402338] RSP: 002b:00007ffc78bca058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.403357] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f477b7a5d82 [ 31.404301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f477abdf000 [ 31.405240] RBP: 00007f477abdf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.406176] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc75022ec0 [ 31.407113] R13: 00007ffc78bca070 R14: 00007ffc78bca0a0 R15: 00007ffc78bca400 [ 31.408093] [ 31.408411] [ 31.408665] Allocated by task 213: [ 31.409153] kasan_save_stack+0x22/0x50 [ 31.409716] kasan_set_track+0x25/0x30 [ 31.410264] __kasan_slab_alloc+0x59/0x70 [ 31.410848] kmem_cache_alloc+0x16b/0x370 [ 31.411420] vm_area_dup+0x20/0x160 [ 31.411943] __split_vma+0x170/0x950 [ 31.412415] split_vma+0xc6/0x110 [ 31.412915] mprotect_fixup+0x8d2/0xb30 [ 31.413421] do_mprotect_pkey+0x87e/0xd40 [ 31.413948] __x64_sys_mprotect+0x78/0xc0 [ 31.414477] do_syscall_64+0x3f/0x90 [ 31.414964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415616] [ 31.415842] Freed by task 210: [ 31.416241] kasan_save_stack+0x22/0x50 [ 31.416746] kasan_set_track+0x25/0x30 [ 31.417241] kasan_save_free_info+0x2b/0x50 [ 31.417817] __kasan_slab_free+0x10a/0x190 [ 31.418358] kmem_cache_free+0x10d/0x4d0 [ 31.418928] rcu_core+0x8c8/0x2860 [ 31.419379] __do_softirq+0x1b7/0x7d4 [ 31.419879] [ 31.420100] Last potentially related work creation: [ 31.420681] kasan_save_stack+0x22/0x50 [ 31.421185] __kasan_record_aux_stack+0x8e/0xa0 [ 31.421807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.422453] remove_vma+0x139/0x170 [ 31.422957] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.423518] do_vmi_munmap+0x1f1/0x2b0 [ 31.424009] __vm_munmap+0x138/0x3a0 [ 31.424477] __x64_sys_munmap+0x59/0x80 [ 31.424973] do_syscall_64+0x3f/0x90 [ 31.425448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.426134] [ 31.426355] The buggy address belongs to the object at ffff888019ec22b8 [ 31.426355] which belongs to the cache vm_area_struct of size 168 [ 31.427900] The buggy address is located 88 bytes inside of [ 31.427900] freed 168-byte region [ffff888019ec22b8, ffff888019ec2360) [ 31.429304] [ 31.429518] The buggy address belongs to the physical page: [ 31.430178] page:00000000c2724a8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ec2 [ 31.431272] memcg:ffff88800c71c301 [ 31.431720] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.432374] page_type: 0xffffffff() [ 31.432853] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.433864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c71c301 [ 31.434832] page dumped because: kasan: bad access detected [ 31.435533] [ 31.435802] Memory state around the buggy address: [ 31.436423] ffff888019ec2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.437362] ffff888019ec2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.438272] >ffff888019ec2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.439187] ^ [ 31.439691] ffff888019ec2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.440646] ffff888019ec2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.441568] ================================================================== [ 31.442653] Disabling lock debugging due to kernel taint [ 33.840426] BUG: Bad rss-counter state mm:0000000005c46b0c type:MM_FILEPAGES val:33 [ 33.841521] BUG: Bad rss-counter state mm:0000000005c46b0c type:MM_ANONPAGES val:22 [ 34.399701] BUG: Bad rss-counter state mm:00000000e46a2613 type:MM_FILEPAGES val:33 [ 34.400913] BUG: Bad rss-counter state mm:00000000e46a2613 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6549' (ECDSA) to the list of known hosts. 2023/06/20 22:19:12 fuzzer started 2023/06/20 22:19:12 dialing manager at localhost:36067 2023/06/20 22:19:12 checking machine... 2023/06/20 22:19:12 checking revisions... [ 35.055990] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:19:12 testing simple program... [ 35.097646] cgroup: Unknown subsys name 'net' [ 35.145150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:19:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880167f7a88 RCX=ffffffff860d8201 RDX=1ffff11002cfef53 RSI=ffffffff8180c6a2 RDI=ffff8880167f7a98 RBP=ffff8880167f7a58 RSP=ffff8880167f79a0 R8 =ffffffff860d825a R9 =ffff8880167f7a00 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880167f7a88 R13=0000000000000000 R14=ffff88800edb3680 R15=ffff888018b5b438 RIP=ffffffff813ad496 RFL=00000286 [--S--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 00007f1844abd900 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=00007ffebeba7000 CR3=000000000d940000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007fc744710f40 CR3=000000000cfbc000 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=2031313a39313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a39313a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000