syzkaller login: [ 38.703237] BUG: Bad rss-counter state mm:0000000084ce721f type:MM_FILEPAGES val:33 [ 38.704809] BUG: Bad rss-counter state mm:0000000084ce721f type:MM_ANONPAGES val:22 [ 38.873228] ================================================================== [ 38.874307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.875447] Read of size 8 at addr ffff888016f10140 by task sshd/219 [ 38.876323] [ 38.876540] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.877410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.878380] Call Trace: [ 38.878701] [ 38.878996] dump_stack_lvl+0x91/0xf0 [ 38.879494] print_report+0xcc/0x620 [ 38.879975] ? __virt_addr_valid+0x102/0x340 [ 38.880526] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881136] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881753] kasan_report+0xbe/0xf0 [ 38.882233] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882871] vma_interval_tree_remove+0xc75/0xec0 [ 38.883500] vma_prepare+0xc54/0x11a0 [ 38.883997] __split_vma+0x5af/0x950 [ 38.884481] ? __pfx___split_vma+0x10/0x10 [ 38.885027] ? find_held_lock+0x2c/0x110 [ 38.885563] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.886143] ? lock_is_held_type+0x9f/0x120 [ 38.886708] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.887352] ? mtree_range_walk+0x632/0x900 [ 38.887925] ? mas_walk+0x5c7/0x7c0 [ 38.888418] do_vmi_munmap+0x1f1/0x2b0 [ 38.888928] mmap_region+0x1f9/0x2660 [ 38.889430] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.889959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.890701] ? __pfx_lock_acquire+0x10/0x10 [ 38.891267] ? __pfx_mmap_region+0x10/0x10 [ 38.891814] ? security_mmap_addr+0x7d/0xa0 [ 38.892364] ? get_unmapped_area+0x1f5/0x3f0 [ 38.892935] do_mmap+0x854/0xf00 [ 38.893387] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.893899] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.894483] ksys_mmap_pgoff+0x3af/0x500 [ 38.895029] do_syscall_64+0x3f/0x90 [ 38.895531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896202] RIP: 0033:0x7f3f2e995d82 [ 38.896676] 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 [ 38.898913] RSP: 002b:00007fff09660768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.899858] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f2e995d82 [ 38.900740] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f2ddcf000 [ 38.901616] RBP: 00007f3f2ddcf000 R08: 0000000000000009 R09: 0000000000001000 [ 38.902496] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0ca9bcb20 [ 38.903400] R13: 00007fff09660780 R14: 00007fff096607b0 R15: 00007fff09660b10 [ 38.904296] [ 38.904604] [ 38.904821] Allocated by task 212: [ 38.905268] kasan_save_stack+0x22/0x50 [ 38.905801] kasan_set_track+0x25/0x30 [ 38.906327] __kasan_slab_alloc+0x59/0x70 [ 38.906886] kmem_cache_alloc+0x16b/0x370 [ 38.907435] vm_area_dup+0x20/0x160 [ 38.907921] __split_vma+0x170/0x950 [ 38.908418] split_vma+0xc6/0x110 [ 38.908880] mprotect_fixup+0x8d2/0xb30 [ 38.909402] do_mprotect_pkey+0x87e/0xd40 [ 38.909956] __x64_sys_mprotect+0x78/0xc0 [ 38.910513] do_syscall_64+0x3f/0x90 [ 38.911037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911727] [ 38.911956] Freed by task 212: [ 38.912377] kasan_save_stack+0x22/0x50 [ 38.912913] kasan_set_track+0x25/0x30 [ 38.913445] kasan_save_free_info+0x2b/0x50 [ 38.914014] __kasan_slab_free+0x10a/0x190 [ 38.914578] kmem_cache_free+0x10d/0x4d0 [ 38.915139] rcu_core+0x8c8/0x2860 [ 38.915615] __do_softirq+0x1b7/0x7d4 [ 38.916128] [ 38.916357] Last potentially related work creation: [ 38.916988] kasan_save_stack+0x22/0x50 [ 38.917525] __kasan_record_aux_stack+0x8e/0xa0 [ 38.918136] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918824] remove_vma+0x139/0x170 [ 38.919306] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.919897] do_vmi_munmap+0x1f1/0x2b0 [ 38.920416] __vm_munmap+0x138/0x3a0 [ 38.920915] __x64_sys_munmap+0x59/0x80 [ 38.921435] do_syscall_64+0x3f/0x90 [ 38.921937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922617] [ 38.922843] The buggy address belongs to the object at ffff888016f100e8 [ 38.922843] which belongs to the cache vm_area_struct of size 168 [ 38.924457] The buggy address is located 88 bytes inside of [ 38.924457] freed 168-byte region [ffff888016f100e8, ffff888016f10190) [ 38.925951] [ 38.926176] The buggy address belongs to the physical page: [ 38.926900] page:00000000689ff474 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f10 [ 38.928043] memcg:ffff888018c38501 [ 38.928500] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.929191] page_type: 0xffffffff() [ 38.929680] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.930667] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c38501 [ 38.931643] page dumped because: kasan: bad access detected [ 38.932345] [ 38.932572] Memory state around the buggy address: [ 38.933198] ffff888016f10000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.934122] ffff888016f10080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.935054] >ffff888016f10100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.935972] ^ [ 38.936650] ffff888016f10180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.937564] ffff888016f10200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.938480] ================================================================== [ 38.939526] Disabling lock debugging due to kernel taint [ 41.004500] BUG: Bad rss-counter state mm:00000000ea18ffc0 type:MM_FILEPAGES val:33 [ 41.005682] BUG: Bad rss-counter state mm:00000000ea18ffc0 type:MM_ANONPAGES val:22 [ 41.383619] BUG: Bad rss-counter state mm:000000001bfc81bc type:MM_FILEPAGES val:33 [ 41.384773] BUG: Bad rss-counter state mm:000000001bfc81bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57706' (ECDSA) to the list of known hosts. 2023/06/20 19:21:43 fuzzer started 2023/06/20 19:21:43 dialing manager at localhost:36067 2023/06/20 19:21:44 checking machine... 2023/06/20 19:21:44 checking revisions... [ 42.157105] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:21:44 testing simple program... [ 42.206793] cgroup: Unknown subsys name 'net' [ 42.241512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:21:43 Registers: info registers vcpu 0 RAX=1ffff110012dfaab RBX=ffff8880096fd528 RCX=1ffff11001b39f1e RDX=dffffc0000000000 RSI=ffff88801b0a32a0 RDI=ffff8880096fd558 RBP=ffff88800d9cf8c0 RSP=ffff888016e17858 R8 =0000000000000001 R9 =0000000000000246 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=ffff88801b0a3268 R13=0000000000000000 R14=ffff88800e745898 R15=ffff88800e745850 RIP=ffffffff8184767e 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 00007f7d5b57e700 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=00007f9365dbe6e0 CR3=000000000dacc000 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=2033343a31323a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31323a3931203032 XMM08=69767265733d7373616c63742030733a 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=ffff888008c04400 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=00007ffffa1c7000 CR3=000000000e446000 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=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