syzkaller login: [ 31.054873] BUG: Bad rss-counter state mm:000000000a33ef8b type:MM_FILEPAGES val:33 [ 31.055879] BUG: Bad rss-counter state mm:000000000a33ef8b type:MM_ANONPAGES val:22 [ 31.209615] ================================================================== [ 31.210539] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.211201] Read of size 8 at addr ffff88800ec194e0 by task sshd/222 [ 31.211754] [ 31.211914] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.212561] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.213272] Call Trace: [ 31.213520] [ 31.213725] dump_stack_lvl+0x91/0xf0 [ 31.214091] print_report+0xcc/0x620 [ 31.215755] ? __virt_addr_valid+0x102/0x340 [ 31.216160] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216670] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217122] kasan_report+0xbe/0xf0 [ 31.217600] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.218030] vma_interval_tree_remove+0xc75/0xec0 [ 31.218480] vma_prepare+0xc54/0x11a0 [ 31.218878] __split_vma+0x5af/0x950 [ 31.219229] ? __pfx___split_vma+0x10/0x10 [ 31.219667] ? find_held_lock+0x2c/0x110 [ 31.220037] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.220630] ? lock_is_held_type+0x9f/0x120 [ 31.221019] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.221475] ? mtree_range_walk+0x632/0x900 [ 31.221962] ? mas_walk+0x5c7/0x7c0 [ 31.222343] do_vmi_munmap+0x1f1/0x2b0 [ 31.222764] mmap_region+0x1f9/0x2660 [ 31.223116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.223486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.224125] ? __pfx_lock_acquire+0x10/0x10 [ 31.224682] ? __pfx_mmap_region+0x10/0x10 [ 31.225083] ? security_mmap_addr+0x7d/0xa0 [ 31.225476] ? get_unmapped_area+0x1f5/0x3f0 [ 31.225934] do_mmap+0x854/0xf00 [ 31.226275] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.226685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.227086] ksys_mmap_pgoff+0x3af/0x500 [ 31.227596] do_syscall_64+0x3f/0x90 [ 31.228290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.228789] RIP: 0033:0x7f01f0451d82 [ 31.229113] 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 [ 31.230637] RSP: 002b:00007ffc695d2c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.231327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01f0451d82 [ 31.231954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01ef88b000 [ 31.232591] RBP: 00007f01ef88b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.233418] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2ccef0b20 [ 31.234069] R13: 00007ffc695d2ca0 R14: 00007ffc695d2cd0 R15: 00007ffc695d3030 [ 31.234727] [ 31.234958] [ 31.235127] Allocated by task 213: [ 31.235444] kasan_save_stack+0x22/0x50 [ 31.235832] kasan_set_track+0x25/0x30 [ 31.236205] __kasan_slab_alloc+0x59/0x70 [ 31.236592] kmem_cache_alloc+0x16b/0x370 [ 31.237152] vm_area_dup+0x20/0x160 [ 31.237506] __split_vma+0x170/0x950 [ 31.237877] split_vma+0xc6/0x110 [ 31.238202] mprotect_fixup+0x8d2/0xb30 [ 31.238547] do_mprotect_pkey+0x87e/0xd40 [ 31.238903] __x64_sys_mprotect+0x78/0xc0 [ 31.239263] do_syscall_64+0x3f/0x90 [ 31.239605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240050] [ 31.240200] Freed by task 203: [ 31.240472] kasan_save_stack+0x22/0x50 [ 31.240837] kasan_set_track+0x25/0x30 [ 31.241193] kasan_save_free_info+0x2b/0x50 [ 31.241566] __kasan_slab_free+0x10a/0x190 [ 31.241940] kmem_cache_free+0x10d/0x4d0 [ 31.242583] rcu_core+0x8c8/0x2860 [ 31.242898] __do_softirq+0x1b7/0x7d4 [ 31.243227] [ 31.243381] Last potentially related work creation: [ 31.243787] kasan_save_stack+0x22/0x50 [ 31.244133] __kasan_record_aux_stack+0x8e/0xa0 [ 31.244548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.245042] remove_vma+0x139/0x170 [ 31.245386] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.245775] do_vmi_munmap+0x1f1/0x2b0 [ 31.246197] __vm_munmap+0x138/0x3a0 [ 31.246526] __x64_sys_munmap+0x59/0x80 [ 31.246899] do_syscall_64+0x3f/0x90 [ 31.247270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247767] [ 31.247925] The buggy address belongs to the object at ffff88800ec19488 [ 31.247925] which belongs to the cache vm_area_struct of size 168 [ 31.249018] The buggy address is located 88 bytes inside of [ 31.249018] freed 168-byte region [ffff88800ec19488, ffff88800ec19530) [ 31.250050] [ 31.250252] The buggy address belongs to the physical page: [ 31.250742] page:00000000e433233f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec19 [ 31.251551] memcg:ffff888019d80d01 [ 31.251882] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.252369] page_type: 0xffffffff() [ 31.252710] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.253402] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d80d01 [ 31.254081] page dumped because: kasan: bad access detected [ 31.254567] [ 31.254719] Memory state around the buggy address: [ 31.255119] ffff88800ec19380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.255716] ffff88800ec19400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.256377] >ffff88800ec19480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.257099] ^ [ 31.257616] ffff88800ec19500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.258220] ffff88800ec19580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.258950] ================================================================== [ 31.259613] Disabling lock debugging due to kernel taint [ 33.463973] BUG: Bad rss-counter state mm:00000000af2ce937 type:MM_FILEPAGES val:33 [ 33.465110] BUG: Bad rss-counter state mm:00000000af2ce937 type:MM_ANONPAGES val:22 [ 33.918924] BUG: Bad rss-counter state mm:00000000a1991f6c type:MM_FILEPAGES val:33 [ 33.919704] BUG: Bad rss-counter state mm:00000000a1991f6c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19715' (ECDSA) to the list of known hosts. 2023/06/21 10:38:38 fuzzer started 2023/06/21 10:38:38 dialing manager at localhost:36067 2023/06/21 10:38:38 checking machine... 2023/06/21 10:38:38 checking revisions... 2023/06/21 10:38:38 testing simple program... [ 34.609993] kmemleak: Automatic memory scanning thread ended [ 34.653959] cgroup: Unknown subsys name 'net' [ 34.693330] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:38:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000f4 RCX=0000000000000000 RDX=ffff88800f0cb680 RSI=00007fff16328c94 RDI=0000000000000000 RBP=00007fff16328ba0 RSP=ffff8880173b7a78 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880167ba700 R13=00007fff16328c94 R14=0000000000000000 R15=ffff8880173b7d90 RIP=ffffffff814c0434 RFL=00000246 [---Z-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 00007f666432c900 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=00007fff16329000 CR3=000000000d8fa000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815d9816 RDI=ffff888008d955b4 RBP=ffff888008d951c0 RSP=ffff88806cf09d50 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=0000000000000000 R13=ffff88806cf39518 R14=0000000000000001 R15=ffff888008d951c0 RIP=ffffffff8135bdc9 RFL=00000046 [---Z-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 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=00007efd8f51bec0 CR3=000000000e0cc000 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=2038333a38333a3031203132206e754a XMM01=6964206465766965636552203a5d3133 XMM02=6f63736964203a31313a383630363420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a38333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000