syzkaller login: [ 38.019213] BUG: Bad rss-counter state mm:000000002fa64ba4 type:MM_FILEPAGES val:33 [ 38.029096] BUG: Bad rss-counter state mm:000000002fa64ba4 type:MM_ANONPAGES val:22 [ 38.215841] ================================================================== [ 38.216449] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.216996] Read of size 8 at addr ffff88800f1f0228 by task sshd/220 [ 38.217504] [ 38.217645] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.218186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.218752] Call Trace: [ 38.218951] [ 38.219139] dump_stack_lvl+0x91/0xf0 [ 38.219431] print_report+0xcc/0x620 [ 38.219743] ? __virt_addr_valid+0x102/0x340 [ 38.220072] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.220421] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.220765] kasan_report+0xbe/0xf0 [ 38.221063] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.221414] vma_interval_tree_remove+0xc75/0xec0 [ 38.221751] vma_prepare+0xc54/0x11a0 [ 38.222023] __split_vma+0x5af/0x950 [ 38.222288] ? __pfx___split_vma+0x10/0x10 [ 38.222632] ? find_held_lock+0x2c/0x110 [ 38.222928] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.223274] ? lock_is_held_type+0x9f/0x120 [ 38.223638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.224313] ? mtree_range_walk+0x632/0x900 [ 38.224650] ? mas_walk+0x5c7/0x7c0 [ 38.224935] do_vmi_munmap+0x1f1/0x2b0 [ 38.225231] mmap_region+0x1f9/0x2660 [ 38.225514] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.225813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.226229] ? __pfx_lock_acquire+0x10/0x10 [ 38.226550] ? __pfx_mmap_region+0x10/0x10 [ 38.226863] ? security_mmap_addr+0x7d/0xa0 [ 38.227179] ? get_unmapped_area+0x1f5/0x3f0 [ 38.227504] do_mmap+0x854/0xf00 [ 38.228765] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.229109] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.229476] ksys_mmap_pgoff+0x3af/0x500 [ 38.229810] do_syscall_64+0x3f/0x90 [ 38.230129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.230562] RIP: 0033:0x7f9c52a02d82 [ 38.230867] 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 [ 38.236391] RSP: 002b:00007ffc5f620c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.236987] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c52a02d82 [ 38.237541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c51e3c000 [ 38.238096] RBP: 00007f9c51e3c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.238663] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572e10a2f70 [ 38.239221] R13: 00007ffc5f620c90 R14: 00007ffc5f620cc0 R15: 00007ffc5f621020 [ 38.240022] [ 38.240223] [ 38.240370] Allocated by task 211: [ 38.240655] kasan_save_stack+0x22/0x50 [ 38.240998] kasan_set_track+0x25/0x30 [ 38.241366] __kasan_slab_alloc+0x59/0x70 [ 38.241730] kmem_cache_alloc+0x16b/0x370 [ 38.242081] vm_area_dup+0x20/0x160 [ 38.242378] __split_vma+0x170/0x950 [ 38.242685] split_vma+0xc6/0x110 [ 38.242983] mprotect_fixup+0x8d2/0xb30 [ 38.243332] do_mprotect_pkey+0x87e/0xd40 [ 38.247832] __x64_sys_mprotect+0x78/0xc0 [ 38.248255] do_syscall_64+0x3f/0x90 [ 38.248588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.249034] [ 38.249183] Freed by task 211: [ 38.249450] kasan_save_stack+0x22/0x50 [ 38.249793] kasan_set_track+0x25/0x30 [ 38.250129] kasan_save_free_info+0x2b/0x50 [ 38.250495] __kasan_slab_free+0x10a/0x190 [ 38.250856] kmem_cache_free+0x10d/0x4d0 [ 38.251201] rcu_core+0x8c8/0x2860 [ 38.251544] __do_softirq+0x1b7/0x7d4 [ 38.251988] [ 38.252136] Last potentially related work creation: [ 38.252557] kasan_save_stack+0x22/0x50 [ 38.252901] __kasan_record_aux_stack+0x8e/0xa0 [ 38.253295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.253732] remove_vma+0x139/0x170 [ 38.254040] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.254418] do_vmi_munmap+0x1f1/0x2b0 [ 38.254750] __vm_munmap+0x138/0x3a0 [ 38.255067] __x64_sys_munmap+0x59/0x80 [ 38.255406] do_syscall_64+0x3f/0x90 [ 38.255870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.256320] [ 38.256468] The buggy address belongs to the object at ffff88800f1f01d0 [ 38.256468] which belongs to the cache vm_area_struct of size 168 [ 38.257436] The buggy address is located 88 bytes inside of [ 38.257436] freed 168-byte region [ffff88800f1f01d0, ffff88800f1f0278) [ 38.258378] [ 38.258529] The buggy address belongs to the physical page: [ 38.258976] page:00000000ad2c235a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1f0 [ 38.259852] memcg:ffff88800e63cd01 [ 38.260151] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.260626] page_type: 0xffffffff() [ 38.260936] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.261551] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e63cd01 [ 38.262158] page dumped because: kasan: bad access detected [ 38.262608] [ 38.262757] Memory state around the buggy address: [ 38.263148] ffff88800f1f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.263877] ffff88800f1f0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.264455] >ffff88800f1f0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.265023] ^ [ 38.265403] ffff88800f1f0280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.265972] ffff88800f1f0300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.266543] ================================================================== [ 38.267200] Disabling lock debugging due to kernel taint [ 40.236825] BUG: Bad rss-counter state mm:0000000048161a32 type:MM_FILEPAGES val:33 [ 40.237642] BUG: Bad rss-counter state mm:0000000048161a32 type:MM_ANONPAGES val:22 [ 42.019660] BUG: Bad rss-counter state mm:000000008d904014 type:MM_FILEPAGES val:33 [ 42.020292] BUG: Bad rss-counter state mm:000000008d904014 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59417' (ECDSA) to the list of known hosts. 2023/06/21 08:09:17 fuzzer started 2023/06/21 08:09:17 dialing manager at localhost:36067 2023/06/21 08:09:17 checking machine... 2023/06/21 08:09:17 checking revisions... [ 42.743686] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:09:17 testing simple program... [ 42.793283] cgroup: Unknown subsys name 'net' [ 42.846595] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:09:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000040 RCX=ffffffff818a556f RDX=ffff888014259b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801432fb00 RSP=ffff88801432fa60 R8 =0000000000000005 R9 =ffffffff818a552f R10=0000000000000000 R11=00000000000b6a61 R12=ffff88801432fc48 R13=0000000000000000 R14=0000000000000001 R15=ffff88801432fdf0 RIP=ffffffff814c0860 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 00007f8ad09aa900 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=00007f8acfdb12f0 CR3=000000000cad8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=78bb12e08902a0f400000000000ae988 XMM05=462a21c6362578e400000000001328e0 XMM06=1319e678c5640f8a00000000001312f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000e6 RBX=ffff88800db440e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffffff811654d8 RSP=ffff88801308fb98 R8 =0000000000000005 R9 =0000000000000003 R10=ffffed1001b6881b R11=00000000000b6a61 R12=ffff88800db440d8 R13=ffff8880087a0dc0 R14=ffffffff811654d8 R15=ffff88800ceab180 RIP=ffffffff8180c700 RFL=00000216 [----AP-] 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=00007f2b52beb328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000