syzkaller login: [ 30.878940] BUG: Bad rss-counter state mm:000000003b7bc5e4 type:MM_FILEPAGES val:33 [ 30.880107] BUG: Bad rss-counter state mm:000000003b7bc5e4 type:MM_ANONPAGES val:22 [ 31.046794] ================================================================== [ 31.047726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.048665] Read of size 8 at addr ffff888019c4b3f8 by task sshd/221 [ 31.049507] [ 31.049726] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.050581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.051558] Call Trace: [ 31.051879] [ 31.052159] dump_stack_lvl+0x91/0xf0 [ 31.052654] print_report+0xcc/0x620 [ 31.053170] ? __virt_addr_valid+0x102/0x340 [ 31.053718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054332] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054947] kasan_report+0xbe/0xf0 [ 31.055420] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.056047] vma_interval_tree_remove+0xc75/0xec0 [ 31.056647] vma_prepare+0xc54/0x11a0 [ 31.057139] __split_vma+0x5af/0x950 [ 31.057611] ? __pfx___split_vma+0x10/0x10 [ 31.058146] ? find_held_lock+0x2c/0x110 [ 31.058673] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.059237] ? lock_is_held_type+0x9f/0x120 [ 31.059794] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.060412] ? mtree_range_walk+0x632/0x900 [ 31.060985] ? mas_walk+0x5c7/0x7c0 [ 31.061467] do_vmi_munmap+0x1f1/0x2b0 [ 31.061972] mmap_region+0x1f9/0x2660 [ 31.062456] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.062973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.063701] ? __pfx_lock_acquire+0x10/0x10 [ 31.064257] ? __pfx_mmap_region+0x10/0x10 [ 31.064813] ? security_mmap_addr+0x7d/0xa0 [ 31.065383] ? get_unmapped_area+0x1f5/0x3f0 [ 31.065952] do_mmap+0x854/0xf00 [ 31.066412] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.066927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.067512] ksys_mmap_pgoff+0x3af/0x500 [ 31.068046] do_syscall_64+0x3f/0x90 [ 31.068546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.069231] RIP: 0033:0x7f03ac135d82 [ 31.069707] 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 [ 31.071935] RSP: 002b:00007ffe766991f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.072903] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03ac135d82 [ 31.073788] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03ab56f000 [ 31.074671] RBP: 00007f03ab56f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.075559] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab95e0fec0 [ 31.076444] R13: 00007ffe76699210 R14: 00007ffe76699240 R15: 00007ffe766995a0 [ 31.077352] [ 31.077656] [ 31.077886] Allocated by task 214: [ 31.078340] kasan_save_stack+0x22/0x50 [ 31.078874] kasan_set_track+0x25/0x30 [ 31.079386] __kasan_slab_alloc+0x59/0x70 [ 31.079929] kmem_cache_alloc+0x16b/0x370 [ 31.080471] vm_area_dup+0x20/0x160 [ 31.080952] __split_vma+0x170/0x950 [ 31.081439] split_vma+0xc6/0x110 [ 31.081895] mprotect_fixup+0x8d2/0xb30 [ 31.082415] do_mprotect_pkey+0x87e/0xd40 [ 31.082951] __x64_sys_mprotect+0x78/0xc0 [ 31.083491] do_syscall_64+0x3f/0x90 [ 31.083984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084656] [ 31.084878] Freed by task 214: [ 31.085307] kasan_save_stack+0x22/0x50 [ 31.085829] kasan_set_track+0x25/0x30 [ 31.086342] kasan_save_free_info+0x2b/0x50 [ 31.086898] __kasan_slab_free+0x10a/0x190 [ 31.087453] kmem_cache_free+0x10d/0x4d0 [ 31.087986] rcu_core+0x8c8/0x2860 [ 31.088448] __do_softirq+0x1b7/0x7d4 [ 31.088955] [ 31.089178] Last potentially related work creation: [ 31.089793] kasan_save_stack+0x22/0x50 [ 31.090318] __kasan_record_aux_stack+0x8e/0xa0 [ 31.090917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.091582] remove_vma+0x139/0x170 [ 31.092050] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.092633] do_vmi_munmap+0x1f1/0x2b0 [ 31.093149] __vm_munmap+0x138/0x3a0 [ 31.093635] __x64_sys_munmap+0x59/0x80 [ 31.094151] do_syscall_64+0x3f/0x90 [ 31.094641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.095308] [ 31.095531] Second to last potentially related work creation: [ 31.096242] kasan_save_stack+0x22/0x50 [ 31.096765] __kasan_record_aux_stack+0x8e/0xa0 [ 31.097379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.098023] remove_vma+0x139/0x170 [ 31.098480] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.099041] do_vmi_munmap+0x1f1/0x2b0 [ 31.099531] mmap_region+0x1f9/0x2660 [ 31.100019] do_mmap+0x854/0xf00 [ 31.100452] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.100951] ksys_mmap_pgoff+0x3af/0x500 [ 31.101454] do_syscall_64+0x3f/0x90 [ 31.101928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102570] [ 31.102783] The buggy address belongs to the object at ffff888019c4b3a0 [ 31.102783] which belongs to the cache vm_area_struct of size 168 [ 31.104261] The buggy address is located 88 bytes inside of [ 31.104261] freed 168-byte region [ffff888019c4b3a0, ffff888019c4b448) [ 31.105672] [ 31.105896] The buggy address belongs to the physical page: [ 31.106554] page:00000000129a6575 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c4b [ 31.107640] memcg:ffff88800fe69701 [ 31.108067] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.108774] page_type: 0xffffffff() [ 31.109234] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.110149] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe69701 [ 31.111065] page dumped because: kasan: bad access detected [ 31.111724] [ 31.111941] Memory state around the buggy address: [ 31.112527] ffff888019c4b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.113403] ffff888019c4b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.114268] >ffff888019c4b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.115118] ^ [ 31.115959] ffff888019c4b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.116825] ffff888019c4b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.117699] ================================================================== [ 31.118831] Disabling lock debugging due to kernel taint [ 33.747509] BUG: Bad rss-counter state mm:0000000099ae946f type:MM_FILEPAGES val:33 [ 33.748306] BUG: Bad rss-counter state mm:0000000099ae946f type:MM_ANONPAGES val:22 [ 34.183954] BUG: Bad rss-counter state mm:00000000ac906e10 type:MM_FILEPAGES val:33 [ 34.184709] BUG: Bad rss-counter state mm:00000000ac906e10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46954' (ECDSA) to the list of known hosts. 2023/06/20 15:36:28 fuzzer started 2023/06/20 15:36:28 dialing manager at localhost:36067 2023/06/20 15:36:29 checking machine... 2023/06/20 15:36:29 checking revisions... [ 34.922825] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:36:29 testing simple program... [ 34.967470] cgroup: Unknown subsys name 'net' [ 35.001499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:36:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9f978 RCX=0000000000000001 RDX=1ffff110011b3f30 RSI=ffff888008d9f948 RDI=ffff888008d9f980 RBP=ffff888008d9f948 RSP=ffff888008d9f880 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff888008d9f9c0 R14=ffff888008d9f948 R15=ffff888008d9f978 RIP=ffffffff81130445 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 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=00007fcd5f43b010 CR3=000000000d61e000 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=b77f3a67efd4e9a3dd4b5cc87b7e2cc6 XMM02=000000000011d1c8eff9b2d0a8fce9cb XMM03=000000000011d2982c67c8bc2e329bc3 XMM04=f9f5be724cd9b97d00000000000ae988 XMM05=f92b265f4000718c0000000000133d20 XMM06=dfe856090692b4f50000000000132ac0 XMM07=fb795ef6d657705600000000001219a0 XMM08=2c67c8bc2e329bc3000000000011d238 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011c6f33 RSI=ffffffff818d9c06 RDI=ffff888008e37958 RBP=ffff888008e379b0 RSP=ffff888008e378e8 R8 =0000000000000001 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008e379b8 R13=ffff888008e379a0 R14=ffff888008e37999 R15=ffff888008e37958 RIP=ffffffff811306da 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=00007f92451ae618 CR3=000000001594c000 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=36333a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000