syzkaller login: [ 38.783749] BUG: Bad rss-counter state mm:000000008bd8d25a type:MM_FILEPAGES val:33 [ 38.784945] BUG: Bad rss-counter state mm:000000008bd8d25a type:MM_ANONPAGES val:22 [ 38.822863] ================================================================== [ 38.823863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.824775] Read of size 8 at addr ffff888017e9a140 by task sshd/220 [ 38.825528] [ 38.825742] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.826606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.827570] Call Trace: [ 38.827883] [ 38.828163] dump_stack_lvl+0x91/0xf0 [ 38.828645] print_report+0xcc/0x620 [ 38.829119] ? __virt_addr_valid+0x102/0x340 [ 38.829667] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.830311] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.830917] kasan_report+0xbe/0xf0 [ 38.831391] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.832006] vma_interval_tree_remove+0xc75/0xec0 [ 38.832605] vma_prepare+0xc54/0x11a0 [ 38.833080] __split_vma+0x5af/0x950 [ 38.833542] ? __pfx___split_vma+0x10/0x10 [ 38.834063] ? find_held_lock+0x2c/0x110 [ 38.834588] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.835144] ? lock_is_held_type+0x9f/0x120 [ 38.835680] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.836281] ? mtree_range_walk+0x632/0x900 [ 38.836827] ? mas_walk+0x5c7/0x7c0 [ 38.837295] do_vmi_munmap+0x1f1/0x2b0 [ 38.837784] mmap_region+0x1f9/0x2660 [ 38.838277] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.838785] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.839486] ? __pfx_lock_acquire+0x10/0x10 [ 38.840009] ? __pfx_mmap_region+0x10/0x10 [ 38.840533] ? security_mmap_addr+0x7d/0xa0 [ 38.841059] ? get_unmapped_area+0x1f5/0x3f0 [ 38.841598] do_mmap+0x854/0xf00 [ 38.842034] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.842546] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.843103] ksys_mmap_pgoff+0x3af/0x500 [ 38.843600] do_syscall_64+0x3f/0x90 [ 38.844077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.844710] RIP: 0033:0x7f4e66a2fd82 [ 38.845159] 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 [ 38.847269] RSP: 002b:00007fff3d4c4af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.848166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e66a2fd82 [ 38.849007] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e65e69000 [ 38.849842] RBP: 00007f4e65e69000 R08: 0000000000000009 R09: 0000000000001000 [ 38.850853] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a641092f70 [ 38.851691] R13: 00007fff3d4c4b10 R14: 00007fff3d4c4b40 R15: 00007fff3d4c4ea0 [ 38.852544] [ 38.852830] [ 38.853041] Allocated by task 213: [ 38.853470] kasan_save_stack+0x22/0x50 [ 38.853972] kasan_set_track+0x25/0x30 [ 38.854478] __kasan_slab_alloc+0x59/0x70 [ 38.854994] kmem_cache_alloc+0x16b/0x370 [ 38.855501] vm_area_dup+0x20/0x160 [ 38.855955] __split_vma+0x170/0x950 [ 38.856411] split_vma+0xc6/0x110 [ 38.856849] mprotect_fixup+0x8d2/0xb30 [ 38.857344] do_mprotect_pkey+0x87e/0xd40 [ 38.857860] __x64_sys_mprotect+0x78/0xc0 [ 38.858386] do_syscall_64+0x3f/0x90 [ 38.858849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.859483] [ 38.859694] Freed by task 213: [ 38.860085] kasan_save_stack+0x22/0x50 [ 38.860582] kasan_set_track+0x25/0x30 [ 38.861067] kasan_save_free_info+0x2b/0x50 [ 38.861595] __kasan_slab_free+0x10a/0x190 [ 38.862139] kmem_cache_free+0x10d/0x4d0 [ 38.862638] rcu_core+0x8c8/0x2860 [ 38.863084] __do_softirq+0x1b7/0x7d4 [ 38.863560] [ 38.863769] Last potentially related work creation: [ 38.864353] kasan_save_stack+0x22/0x50 [ 38.864848] __kasan_record_aux_stack+0x8e/0xa0 [ 38.865414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.866053] remove_vma+0x139/0x170 [ 38.866512] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.867060] do_vmi_munmap+0x1f1/0x2b0 [ 38.867540] __vm_munmap+0x138/0x3a0 [ 38.868004] __x64_sys_munmap+0x59/0x80 [ 38.868489] do_syscall_64+0x3f/0x90 [ 38.868961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.869597] [ 38.869812] The buggy address belongs to the object at ffff888017e9a0e8 [ 38.869812] which belongs to the cache vm_area_struct of size 168 [ 38.871286] The buggy address is located 88 bytes inside of [ 38.871286] freed 168-byte region [ffff888017e9a0e8, ffff888017e9a190) [ 38.872679] [ 38.872891] The buggy address belongs to the physical page: [ 38.873542] page:0000000062f8c2cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e9a [ 38.874633] memcg:ffff8880094c5301 [ 38.875056] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.875691] page_type: 0xffffffff() [ 38.876138] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.877049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094c5301 [ 38.877940] page dumped because: kasan: bad access detected [ 38.878619] [ 38.878832] Memory state around the buggy address: [ 38.879411] ffff888017e9a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.880257] ffff888017e9a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.881105] >ffff888017e9a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.881945] ^ [ 38.882578] ffff888017e9a180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.883420] ffff888017e9a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.884262] ================================================================== [ 38.885643] Disabling lock debugging due to kernel taint [ 40.713632] BUG: Bad rss-counter state mm:000000001e437afd type:MM_FILEPAGES val:33 [ 40.714394] BUG: Bad rss-counter state mm:000000001e437afd type:MM_ANONPAGES val:22 [ 41.197597] BUG: Bad rss-counter state mm:00000000d4100fba type:MM_FILEPAGES val:33 [ 41.198482] BUG: Bad rss-counter state mm:00000000d4100fba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14373' (ECDSA) to the list of known hosts. 2023/06/21 06:43:42 fuzzer started 2023/06/21 06:43:42 dialing manager at localhost:36067 2023/06/21 06:43:42 checking machine... 2023/06/21 06:43:42 checking revisions... [ 41.891298] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:43:42 testing simple program... [ 41.932022] cgroup: Unknown subsys name 'net' [ 41.987315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:43:42 Registers: info registers vcpu 0 RAX=dffffc0000000005 RBX=00000000000003f9 RCX=0000000000000000 RDX=00000000000003f9 RSI=ffffffff82505410 RDI=ffffffff87f6f0a0 RBP=ffffffff87f6f060 RSP=ffff88806ce09cc0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000001bfe4da830 R12=ffffffff87f6f060 R13=ffffffff87f6f13c R14=0000000000000004 R15=0000000000000246 RIP=ffffffff82505465 RFL=00000006 [-----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 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=00007f2fc49bb9c0 CR3=0000000013aac000 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=a2f3491620960395ab436e48b871f6d5 XMM02=000000000011abd0eff9b2d0a8fce9cb XMM03=000000000011aca02c67c8bc2e329bc3 XMM04=50ca033c96dec86200000000000ae988 XMM05=ff72dec8aaa28abc00000000001325c0 XMM06=19e9129bd510f23500000000001310e8 XMM07=fb795ef6d657705600000000001215e0 XMM08=2c67c8bc2e329bc3000000000011ac40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81260731 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888018c3f7e8 RSP=ffff888018c3f618 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000001 R13=ffff888014799b40 R14=0000000000000000 R15=0000000000000009 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007fce75ff6700 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=00007ffe679eb000 CR3=000000000db70000 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=33343a3630203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000