syzkaller login: [ 31.192990] BUG: Bad rss-counter state mm:0000000022f9a3ba type:MM_FILEPAGES val:33 [ 31.194554] BUG: Bad rss-counter state mm:0000000022f9a3ba type:MM_ANONPAGES val:22 [ 31.343333] ================================================================== [ 31.344471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.345657] Read of size 8 at addr ffff88800dd925c8 by task sshd/220 [ 31.346832] [ 31.347098] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.348173] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.349353] Call Trace: [ 31.349740] [ 31.350087] dump_stack_lvl+0x91/0xf0 [ 31.350705] print_report+0xcc/0x620 [ 31.351299] ? __virt_addr_valid+0x102/0x340 [ 31.351969] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352717] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353466] kasan_report+0xbe/0xf0 [ 31.354052] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354849] vma_interval_tree_remove+0xc75/0xec0 [ 31.355550] vma_prepare+0xc54/0x11a0 [ 31.356048] __split_vma+0x5af/0x950 [ 31.356549] ? __pfx___split_vma+0x10/0x10 [ 31.357105] ? find_held_lock+0x2c/0x110 [ 31.357649] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.358235] ? lock_is_held_type+0x9f/0x120 [ 31.358799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.359436] ? mtree_range_walk+0x632/0x900 [ 31.360012] ? mas_walk+0x5c7/0x7c0 [ 31.360511] do_vmi_munmap+0x1f1/0x2b0 [ 31.361029] mmap_region+0x1f9/0x2660 [ 31.361538] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.362078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.362845] ? __pfx_lock_acquire+0x10/0x10 [ 31.363402] ? __pfx_mmap_region+0x10/0x10 [ 31.363959] ? security_mmap_addr+0x7d/0xa0 [ 31.364515] ? get_unmapped_area+0x1f5/0x3f0 [ 31.365092] do_mmap+0x854/0xf00 [ 31.365547] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.366071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.366668] ksys_mmap_pgoff+0x3af/0x500 [ 31.367201] do_syscall_64+0x3f/0x90 [ 31.367715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368402] RIP: 0033:0x7f75f7257d82 [ 31.368891] 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 [ 31.371158] RSP: 002b:00007ffdf08790b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.372126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75f7257d82 [ 31.373032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75f6691000 [ 31.373938] RBP: 00007f75f6691000 R08: 0000000000000009 R09: 0000000000001000 [ 31.374852] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddbc106b20 [ 31.375739] R13: 00007ffdf08790d0 R14: 00007ffdf0879100 R15: 00007ffdf0879460 [ 31.376645] [ 31.376954] [ 31.377182] Allocated by task 213: [ 31.377637] kasan_save_stack+0x22/0x50 [ 31.378163] kasan_set_track+0x25/0x30 [ 31.378698] __kasan_slab_alloc+0x59/0x70 [ 31.379243] kmem_cache_alloc+0x16b/0x370 [ 31.379794] vm_area_dup+0x20/0x160 [ 31.380268] __split_vma+0x170/0x950 [ 31.380757] split_vma+0xc6/0x110 [ 31.381207] mprotect_fixup+0x8d2/0xb30 [ 31.381731] do_mprotect_pkey+0x87e/0xd40 [ 31.382298] __x64_sys_mprotect+0x78/0xc0 [ 31.382843] do_syscall_64+0x3f/0x90 [ 31.383343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384016] [ 31.384243] Freed by task 213: [ 31.384650] kasan_save_stack+0x22/0x50 [ 31.385179] kasan_set_track+0x25/0x30 [ 31.385696] kasan_save_free_info+0x2b/0x50 [ 31.386262] __kasan_slab_free+0x10a/0x190 [ 31.386829] kmem_cache_free+0x10d/0x4d0 [ 31.387435] rcu_core+0x8c8/0x2860 [ 31.387907] __do_softirq+0x1b7/0x7d4 [ 31.388412] [ 31.388637] Last potentially related work creation: [ 31.389259] kasan_save_stack+0x22/0x50 [ 31.389788] __kasan_record_aux_stack+0x8e/0xa0 [ 31.390434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.391113] remove_vma+0x139/0x170 [ 31.391582] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.392159] do_vmi_munmap+0x1f1/0x2b0 [ 31.392657] __vm_munmap+0x138/0x3a0 [ 31.393154] __x64_sys_munmap+0x59/0x80 [ 31.393675] do_syscall_64+0x3f/0x90 [ 31.394168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.394839] [ 31.395067] The buggy address belongs to the object at ffff88800dd92570 [ 31.395067] which belongs to the cache vm_area_struct of size 168 [ 31.396613] The buggy address is located 88 bytes inside of [ 31.396613] freed 168-byte region [ffff88800dd92570, ffff88800dd92618) [ 31.398099] [ 31.398333] The buggy address belongs to the physical page: [ 31.399033] page:00000000c28e4950 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd92 [ 31.400172] memcg:ffff8880101e7701 [ 31.400624] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.401307] page_type: 0xffffffff() [ 31.401773] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.402760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880101e7701 [ 31.403714] page dumped because: kasan: bad access detected [ 31.404416] [ 31.404638] Memory state around the buggy address: [ 31.405254] ffff88800dd92480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.406153] ffff88800dd92500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.407076] >ffff88800dd92580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.407982] ^ [ 31.408689] ffff88800dd92600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.409586] ffff88800dd92680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.410497] ================================================================== [ 31.411458] Disabling lock debugging due to kernel taint [ 33.382716] BUG: Bad rss-counter state mm:00000000b55cbe06 type:MM_FILEPAGES val:33 [ 33.383861] BUG: Bad rss-counter state mm:00000000b55cbe06 type:MM_ANONPAGES val:22 [ 33.874634] BUG: Bad rss-counter state mm:000000000fc0e8d0 type:MM_FILEPAGES val:33 [ 33.875629] BUG: Bad rss-counter state mm:000000000fc0e8d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29806' (ECDSA) to the list of known hosts. 2023/06/20 18:31:51 fuzzer started 2023/06/20 18:31:52 dialing manager at localhost:36067 2023/06/20 18:31:52 checking machine... 2023/06/20 18:31:52 checking revisions... [ 34.613257] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:31:52 testing simple program... [ 34.664184] cgroup: Unknown subsys name 'net' [ 34.716715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:31:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa9928f06c0 CR3=000000000978c000 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=a20dec7f875a53b7c74bb91e9b59bb94 XMM02=ec2efd57dc4c00df000000000011a8c0 XMM03=12da2d26d2c585bd000000000011a990 XMM04=b656d885c553cdd200000000000ae988 XMM05=19e9129bd510f2350000000000131d18 XMM06=09517c57b562d3f30000000000130b80 XMM07=e042d86d42eb936e0000000000122128 XMM08=12da2d26d2c585bd000000000011a990 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81f58bfc RDX=ffff8880158b9b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800a3bfa88 R8 =0000000000000005 R9 =00000000ffffff8c R10=0000000000000000 R11=0000000000000000 R12=ffff888009dcc0d8 R13=0000000000000000 R14=ffff88800a09b808 R15=dffffc0000000000 RIP=ffffffff814c0408 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 00007f5ccfe72900 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=00007ffe96a31000 CR3=00000000160b6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000