syzkaller login: [ 41.105715] BUG: Bad rss-counter state mm:00000000cb0f9d6d type:MM_FILEPAGES val:33 [ 41.106899] BUG: Bad rss-counter state mm:00000000cb0f9d6d type:MM_ANONPAGES val:22 [ 41.144551] ================================================================== [ 41.145512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.146692] Read of size 8 at addr ffff88800dec26b0 by task sshd/220 [ 41.147449] [ 41.147665] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.148546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.149516] Call Trace: [ 41.149836] [ 41.150127] dump_stack_lvl+0x91/0xf0 [ 41.150618] print_report+0xcc/0x620 [ 41.151098] ? __virt_addr_valid+0x102/0x340 [ 41.151662] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.152296] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.152920] kasan_report+0xbe/0xf0 [ 41.153402] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.154027] vma_interval_tree_remove+0xc75/0xec0 [ 41.154632] vma_prepare+0xc54/0x11a0 [ 41.155111] __split_vma+0x5af/0x950 [ 41.155579] ? __pfx___split_vma+0x10/0x10 [ 41.156104] ? find_held_lock+0x2c/0x110 [ 41.156658] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.157221] ? lock_is_held_type+0x9f/0x120 [ 41.157756] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.158359] ? mtree_range_walk+0x632/0x900 [ 41.158908] ? mas_walk+0x5c7/0x7c0 [ 41.159385] do_vmi_munmap+0x1f1/0x2b0 [ 41.159873] mmap_region+0x1f9/0x2660 [ 41.160360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.160884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.161596] ? __pfx_lock_acquire+0x10/0x10 [ 41.162128] ? __pfx_mmap_region+0x10/0x10 [ 41.162654] ? security_mmap_addr+0x7d/0xa0 [ 41.163186] ? get_unmapped_area+0x1f5/0x3f0 [ 41.163734] do_mmap+0x854/0xf00 [ 41.164182] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.164681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.165253] ksys_mmap_pgoff+0x3af/0x500 [ 41.165762] do_syscall_64+0x3f/0x90 [ 41.166235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.166875] RIP: 0033:0x7fa37246dd82 [ 41.167336] 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 [ 41.169489] RSP: 002b:00007ffcfccad1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.170398] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa37246dd82 [ 41.171264] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3718a7000 [ 41.172108] RBP: 00007fa3718a7000 R08: 0000000000000009 R09: 0000000000001000 [ 41.172964] R10: 0000000000000812 R11: 0000000000000206 R12: 000056163dc21f70 [ 41.173806] R13: 00007ffcfccad210 R14: 00007ffcfccad240 R15: 00007ffcfccad5a0 [ 41.174679] [ 41.174973] [ 41.175188] Allocated by task 213: [ 41.175616] kasan_save_stack+0x22/0x50 [ 41.176133] kasan_set_track+0x25/0x30 [ 41.176633] __kasan_slab_alloc+0x59/0x70 [ 41.177159] kmem_cache_alloc+0x16b/0x370 [ 41.177677] vm_area_dup+0x20/0x160 [ 41.178129] __split_vma+0x170/0x950 [ 41.178615] split_vma+0xc6/0x110 [ 41.179054] mprotect_fixup+0x8d2/0xb30 [ 41.179557] do_mprotect_pkey+0x87e/0xd40 [ 41.180088] __x64_sys_mprotect+0x78/0xc0 [ 41.180627] do_syscall_64+0x3f/0x90 [ 41.181099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.181746] [ 41.181960] Freed by task 213: [ 41.182354] kasan_save_stack+0x22/0x50 [ 41.182859] kasan_set_track+0x25/0x30 [ 41.183353] kasan_save_free_info+0x2b/0x50 [ 41.183884] __kasan_slab_free+0x10a/0x190 [ 41.184440] kmem_cache_free+0x10d/0x4d0 [ 41.184952] rcu_core+0x8c8/0x2860 [ 41.185401] __do_softirq+0x1b7/0x7d4 [ 41.185880] [ 41.186094] Last potentially related work creation: [ 41.186682] kasan_save_stack+0x22/0x50 [ 41.187194] __kasan_record_aux_stack+0x8e/0xa0 [ 41.187776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.188429] remove_vma+0x139/0x170 [ 41.188882] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.189458] do_vmi_munmap+0x1f1/0x2b0 [ 41.189954] __vm_munmap+0x138/0x3a0 [ 41.190430] __x64_sys_munmap+0x59/0x80 [ 41.190928] do_syscall_64+0x3f/0x90 [ 41.191402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.192042] [ 41.192276] The buggy address belongs to the object at ffff88800dec2658 [ 41.192276] which belongs to the cache vm_area_struct of size 168 [ 41.193736] The buggy address is located 88 bytes inside of [ 41.193736] freed 168-byte region [ffff88800dec2658, ffff88800dec2700) [ 41.195149] [ 41.195370] The buggy address belongs to the physical page: [ 41.196036] page:00000000338dfa06 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdec2 [ 41.197132] memcg:ffff888013f71001 [ 41.197560] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.198202] page_type: 0xffffffff() [ 41.198656] raw: 0100000000000200 ffff88800879fc80 ffffea0000377180 dead000000000004 [ 41.199574] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f71001 [ 41.200501] page dumped because: kasan: bad access detected [ 41.201168] [ 41.201386] Memory state around the buggy address: [ 41.201965] ffff88800dec2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.202818] ffff88800dec2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.203678] >ffff88800dec2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.204538] ^ [ 41.205125] ffff88800dec2700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 41.205977] ffff88800dec2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.206829] ================================================================== [ 41.208004] Disabling lock debugging due to kernel taint [ 43.202294] BUG: Bad rss-counter state mm:000000007c591c2f type:MM_FILEPAGES val:33 [ 43.203270] BUG: Bad rss-counter state mm:000000007c591c2f type:MM_ANONPAGES val:22 [ 43.744432] BUG: Bad rss-counter state mm:000000005b3b66f3 type:MM_FILEPAGES val:33 [ 43.745616] BUG: Bad rss-counter state mm:000000005b3b66f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65418' (ECDSA) to the list of known hosts. 2023/06/20 02:34:36 fuzzer started 2023/06/20 02:34:36 dialing manager at localhost:44161 2023/06/20 02:34:36 checking machine... 2023/06/20 02:34:36 checking revisions... [ 44.376628] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:34:36 testing simple program... [ 44.431559] cgroup: Unknown subsys name 'net' [ 44.484199] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:34:24 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007fd1a8ce5366 RSP=ffff88800da8f5d8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007fd1a8ce5366 R13=0000000000000000 R14=ffff888014608000 R15=0000000000092cc0 RIP=ffffffff8450bdca RFL=00000282 [--S----] 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 00007fd1a87f2900 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=00007fd1a8da9618 CR3=0000000018cfe000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc113808dd0 CR3=000000000d874000 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=2036333a34333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000