syzkaller login: [ 61.099762] BUG: Bad rss-counter state mm:000000006aa31e73 type:MM_FILEPAGES val:33 [ 61.100964] BUG: Bad rss-counter state mm:000000006aa31e73 type:MM_ANONPAGES val:22 [ 61.139015] ================================================================== [ 61.140122] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.141149] Read of size 8 at addr ffff88801671b058 by task sshd/220 [ 61.141928] [ 61.142157] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.143064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.144058] Call Trace: [ 61.144383] [ 61.144670] dump_stack_lvl+0x91/0xf0 [ 61.145206] print_report+0xcc/0x620 [ 61.145688] ? __virt_addr_valid+0x102/0x340 [ 61.146303] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.146966] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.147630] kasan_report+0xbe/0xf0 [ 61.148136] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.148749] vma_interval_tree_remove+0xc75/0xec0 [ 61.149346] vma_prepare+0xc54/0x11a0 [ 61.149825] __split_vma+0x5af/0x950 [ 61.150296] ? __pfx___split_vma+0x10/0x10 [ 61.150828] ? find_held_lock+0x2c/0x110 [ 61.151374] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.151978] ? lock_is_held_type+0x9f/0x120 [ 61.152515] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.153116] ? mtree_range_walk+0x632/0x900 [ 61.153666] ? mas_walk+0x5c7/0x7c0 [ 61.154137] do_vmi_munmap+0x1f1/0x2b0 [ 61.154630] mmap_region+0x1f9/0x2660 [ 61.155114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.155650] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.156413] ? __pfx_lock_acquire+0x10/0x10 [ 61.156944] ? __pfx_mmap_region+0x10/0x10 [ 61.157482] ? security_mmap_addr+0x7d/0xa0 [ 61.158013] ? get_unmapped_area+0x1f5/0x3f0 [ 61.158563] do_mmap+0x854/0xf00 [ 61.159002] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.159524] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.160124] ksys_mmap_pgoff+0x3af/0x500 [ 61.160640] do_syscall_64+0x3f/0x90 [ 61.161120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.161754] RIP: 0033:0x7fe9ff1cdd82 [ 61.162210] 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 [ 61.164401] RSP: 002b:00007fff03214ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.165309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9ff1cdd82 [ 61.166151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9fe607000 [ 61.167000] RBP: 00007fe9fe607000 R08: 0000000000000009 R09: 0000000000001000 [ 61.167898] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8983d9ec0 [ 61.168746] R13: 00007fff03214ec0 R14: 00007fff03214ef0 R15: 00007fff03215250 [ 61.169594] [ 61.169884] [ 61.170097] Allocated by task 213: [ 61.170530] kasan_save_stack+0x22/0x50 [ 61.171034] kasan_set_track+0x25/0x30 [ 61.171546] __kasan_slab_alloc+0x59/0x70 [ 61.172110] kmem_cache_alloc+0x16b/0x370 [ 61.172623] vm_area_dup+0x20/0x160 [ 61.173073] __split_vma+0x170/0x950 [ 61.173537] split_vma+0xc6/0x110 [ 61.173975] mprotect_fixup+0x8d2/0xb30 [ 61.174473] do_mprotect_pkey+0x87e/0xd40 [ 61.174990] __x64_sys_mprotect+0x78/0xc0 [ 61.175523] do_syscall_64+0x3f/0x90 [ 61.176030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.176667] [ 61.176885] Freed by task 213: [ 61.177278] kasan_save_stack+0x22/0x50 [ 61.177783] kasan_set_track+0x25/0x30 [ 61.178272] kasan_save_free_info+0x2b/0x50 [ 61.178800] __kasan_slab_free+0x10a/0x190 [ 61.179350] kmem_cache_free+0x10d/0x4d0 [ 61.179887] rcu_core+0x8c8/0x2860 [ 61.180344] __do_softirq+0x1b7/0x7d4 [ 61.180845] [ 61.181059] Last potentially related work creation: [ 61.181636] kasan_save_stack+0x22/0x50 [ 61.182146] __kasan_record_aux_stack+0x8e/0xa0 [ 61.182717] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.183382] remove_vma+0x139/0x170 [ 61.183856] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.184547] do_vmi_munmap+0x1f1/0x2b0 [ 61.185194] __vm_munmap+0x138/0x3a0 [ 61.185824] __x64_sys_munmap+0x59/0x80 [ 61.186479] do_syscall_64+0x3f/0x90 [ 61.187089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.187953] [ 61.188240] Second to last potentially related work creation: [ 61.189124] kasan_save_stack+0x22/0x50 [ 61.189741] __kasan_record_aux_stack+0x8e/0xa0 [ 61.190326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.190983] remove_vma+0x139/0x170 [ 61.191442] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.192010] do_vmi_munmap+0x1f1/0x2b0 [ 61.192493] mmap_region+0x1f9/0x2660 [ 61.192996] do_mmap+0x854/0xf00 [ 61.193429] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.193969] ksys_mmap_pgoff+0x3af/0x500 [ 61.194483] do_syscall_64+0x3f/0x90 [ 61.194972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.195633] [ 61.195862] The buggy address belongs to the object at ffff88801671b000 [ 61.195862] which belongs to the cache vm_area_struct of size 168 [ 61.197350] The buggy address is located 88 bytes inside of [ 61.197350] freed 168-byte region [ffff88801671b000, ffff88801671b0a8) [ 61.198769] [ 61.199004] The buggy address belongs to the physical page: [ 61.199679] page:00000000c64fdd90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1671b [ 61.200781] memcg:ffff888017ed5501 [ 61.201214] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.201929] page_type: 0xffffffff() [ 61.202382] raw: 0100000000000200 ffff88800879fc80 ffffea0000405cc0 dead000000000003 [ 61.203336] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017ed5501 [ 61.204258] page dumped because: kasan: bad access detected [ 61.204933] [ 61.205149] Memory state around the buggy address: [ 61.205731] ffff88801671af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 61.206597] ffff88801671af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.207496] >ffff88801671b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.208355] ^ [ 61.209099] ffff88801671b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 61.209966] ffff88801671b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.210813] ================================================================== [ 61.211937] Disabling lock debugging due to kernel taint [ 62.924617] BUG: Bad rss-counter state mm:00000000ffa3bf7a type:MM_FILEPAGES val:33 [ 62.925815] BUG: Bad rss-counter state mm:00000000ffa3bf7a type:MM_ANONPAGES val:22 [ 63.398745] BUG: Bad rss-counter state mm:00000000b056f0fc type:MM_FILEPAGES val:33 [ 63.400064] BUG: Bad rss-counter state mm:00000000b056f0fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38827' (ECDSA) to the list of known hosts. 2023/06/20 01:09:24 fuzzer started 2023/06/20 01:09:25 dialing manager at localhost:44161 2023/06/20 01:09:25 checking machine... 2023/06/20 01:09:25 checking revisions... [ 64.119169] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:09:25 testing simple program... [ 64.160535] cgroup: Unknown subsys name 'net' [ 64.202729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:09:24 Registers: info registers vcpu 0 RAX=ffffea0000688b40 RBX=ffff88801a22dab0 RCX=1ffffffff0ba7a02 RDX=ffff88809a22dab0 RSI=0000000000000008 RDI=ffffffff818061b3 RBP=0000000000000000 RSP=ffff888019fc7b78 R8 =ffff88801a22dab0 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000d000c R12=dffffc0000000000 R13=ffff888019fc7bb8 R14=0000000000000000 R15=ffff88801a22d980 RIP=ffffffff8181020f RFL=00000282 [--S----] 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 00007f0a1af61900 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=00007f0a1b516650 CR3=000000000f1f0000 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=ffffffff8185ae43 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028eae6d RSI=ffffffff8185ae43 RDI=ffff8880147573d8 RBP=ffff8880147573a8 RSP=ffff888014757308 R8 =0000000000000001 R9 =ffff888014757350 R10=0000000000038001 R11=00000000000223ea R12=ffff8880147573d8 R13=0000000000000000 R14=ffff8880103051c0 R15=0000000000000020 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 00007fbf2227c900 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=00007fbf216b9280 CR3=000000000c818000 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=08218ac68149906700000000000ae988 XMM05=1267b7ca7f6673230000000000136960 XMM06=3f76c5cb9dbbdfd40000000000135700 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000