syzkaller login: [ 28.968914] BUG: Bad rss-counter state mm:00000000661cbdf8 type:MM_FILEPAGES val:33 [ 28.970684] BUG: Bad rss-counter state mm:00000000661cbdf8 type:MM_ANONPAGES val:22 [ 29.151847] ================================================================== [ 29.152937] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.154159] Read of size 8 at addr ffff88800fc05a50 by task sshd/220 [ 29.154974] [ 29.155207] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.156142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.157170] Call Trace: [ 29.157511] [ 29.157825] dump_stack_lvl+0x91/0xf0 [ 29.158353] print_report+0xcc/0x620 [ 29.158868] ? __virt_addr_valid+0x102/0x340 [ 29.159454] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.160109] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.160762] kasan_report+0xbe/0xf0 [ 29.161268] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.161937] vma_interval_tree_remove+0xc75/0xec0 [ 29.162571] vma_prepare+0xc54/0x11a0 [ 29.163082] __split_vma+0x5af/0x950 [ 29.163586] ? __pfx___split_vma+0x10/0x10 [ 29.164148] ? find_held_lock+0x2c/0x110 [ 29.164707] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.165308] ? lock_is_held_type+0x9f/0x120 [ 29.165905] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.166549] ? mtree_range_walk+0x632/0x900 [ 29.167136] ? mas_walk+0x5c7/0x7c0 [ 29.167642] do_vmi_munmap+0x1f1/0x2b0 [ 29.168170] mmap_region+0x1f9/0x2660 [ 29.168688] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.169236] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.170013] ? __pfx_lock_acquire+0x10/0x10 [ 29.170584] ? __pfx_mmap_region+0x10/0x10 [ 29.171149] ? security_mmap_addr+0x7d/0xa0 [ 29.171716] ? get_unmapped_area+0x1f5/0x3f0 [ 29.172294] do_mmap+0x854/0xf00 [ 29.172761] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.173292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.173916] ksys_mmap_pgoff+0x3af/0x500 [ 29.174458] do_syscall_64+0x3f/0x90 [ 29.174975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.175661] RIP: 0033:0x7f72c0addd82 [ 29.176148] 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 [ 29.178414] RSP: 002b:00007ffc622b8fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.179378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72c0addd82 [ 29.180281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72bff17000 [ 29.181185] RBP: 00007f72bff17000 R08: 0000000000000009 R09: 0000000000001000 [ 29.182088] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf252a1ec0 [ 29.182985] R13: 00007ffc622b9000 R14: 00007ffc622b9030 R15: 00007ffc622b9390 [ 29.183890] [ 29.184207] [ 29.184435] Allocated by task 212: [ 29.184892] kasan_save_stack+0x22/0x50 [ 29.185428] kasan_set_track+0x25/0x30 [ 29.185969] __kasan_slab_alloc+0x59/0x70 [ 29.186528] kmem_cache_alloc+0x16b/0x370 [ 29.187085] vm_area_dup+0x20/0x160 [ 29.187577] __split_vma+0x170/0x950 [ 29.188078] split_vma+0xc6/0x110 [ 29.188549] mprotect_fixup+0x8d2/0xb30 [ 29.189083] do_mprotect_pkey+0x87e/0xd40 [ 29.189650] __x64_sys_mprotect+0x78/0xc0 [ 29.190217] do_syscall_64+0x3f/0x90 [ 29.190730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.191425] [ 29.191651] Freed by task 212: [ 29.192071] kasan_save_stack+0x22/0x50 [ 29.192614] kasan_set_track+0x25/0x30 [ 29.193147] kasan_save_free_info+0x2b/0x50 [ 29.193745] __kasan_slab_free+0x10a/0x190 [ 29.194322] kmem_cache_free+0x10d/0x4d0 [ 29.194861] rcu_core+0x8c8/0x2860 [ 29.195340] __do_softirq+0x1b7/0x7d4 [ 29.195855] [ 29.196085] Last potentially related work creation: [ 29.196721] kasan_save_stack+0x22/0x50 [ 29.197257] __kasan_record_aux_stack+0x8e/0xa0 [ 29.197872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.198564] remove_vma+0x139/0x170 [ 29.199050] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.199649] do_vmi_munmap+0x1f1/0x2b0 [ 29.200177] __vm_munmap+0x138/0x3a0 [ 29.200674] __x64_sys_munmap+0x59/0x80 [ 29.201217] do_syscall_64+0x3f/0x90 [ 29.201730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.202415] [ 29.202648] The buggy address belongs to the object at ffff88800fc059f8 [ 29.202648] which belongs to the cache vm_area_struct of size 168 [ 29.204215] The buggy address is located 88 bytes inside of [ 29.204215] freed 168-byte region [ffff88800fc059f8, ffff88800fc05aa0) [ 29.205730] [ 29.205964] The buggy address belongs to the physical page: [ 29.206672] page:0000000000a8dec5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc05 [ 29.207823] memcg:ffff88800e76f401 [ 29.208278] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.208964] page_type: 0xffffffff() [ 29.209446] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.210427] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e76f401 [ 29.211379] page dumped because: kasan: bad access detected [ 29.212078] [ 29.212306] Memory state around the buggy address: [ 29.212921] ffff88800fc05900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.213844] ffff88800fc05980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.214758] >ffff88800fc05a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.215672] ^ [ 29.216413] ffff88800fc05a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.217322] ffff88800fc05b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.218268] ================================================================== [ 29.219541] Disabling lock debugging due to kernel taint [ 31.550540] BUG: Bad rss-counter state mm:00000000dbe0622d type:MM_FILEPAGES val:33 [ 31.551820] BUG: Bad rss-counter state mm:00000000dbe0622d type:MM_ANONPAGES val:22 [ 32.022109] BUG: Bad rss-counter state mm:00000000a254e167 type:MM_FILEPAGES val:33 [ 32.023214] BUG: Bad rss-counter state mm:00000000a254e167 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51717' (ECDSA) to the list of known hosts. 2023/06/21 06:48:23 fuzzer started 2023/06/21 06:48:23 dialing manager at localhost:36067 2023/06/21 06:48:23 checking machine... 2023/06/21 06:48:23 checking revisions... [ 32.702489] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:48:24 testing simple program... [ 32.759156] cgroup: Unknown subsys name 'net' [ 32.819042] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:48:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1386 RSI=ffffffff818df63c RDI=ffff88806ce09b6c RBP=ffff88806ce09c30 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000246bc R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800f143680 R15=ffff8880090752e0 RIP=ffffffff813ad549 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 00007f5e30a40900 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=00007ffc0af76dd8 CR3=000000000dcde000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f58246f45c0 CR3=000000000d6ca000 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=00000000000000000000000000000000 XMM01=6c84ca7dd8a2c4bccb4847a05977a15f XMM02=eff9b2d0a8fce9cb000000000011cf80 XMM03=2c67c8bc2e329bc3000000000011d0a8 XMM04=db82df85925a4edd00000000000ae988 XMM05=dc1a422570c5cb2d0000000000132808 XMM06=d775acbb0f6bb76d00000000001315a8 XMM07=fb795ef6d657705600000000001217e0 XMM08=2c67c8bc2e329bc3000000000011d0a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000