syzkaller login: [ 30.901126] BUG: Bad rss-counter state mm:00000000cdb6251b type:MM_FILEPAGES val:33 [ 30.902262] BUG: Bad rss-counter state mm:00000000cdb6251b type:MM_ANONPAGES val:22 [ 31.069839] ================================================================== [ 31.070876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.071911] Read of size 8 at addr ffff888010322880 by task sshd/222 [ 31.072916] [ 31.073152] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.074106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.075229] Call Trace: [ 31.075582] [ 31.075896] dump_stack_lvl+0x91/0xf0 [ 31.076439] print_report+0xcc/0x620 [ 31.076972] ? __virt_addr_valid+0x102/0x340 [ 31.077587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.078280] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.078974] kasan_report+0xbe/0xf0 [ 31.079508] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.080198] vma_interval_tree_remove+0xc75/0xec0 [ 31.080869] vma_prepare+0xc54/0x11a0 [ 31.081406] __split_vma+0x5af/0x950 [ 31.081933] ? __pfx___split_vma+0x10/0x10 [ 31.082515] ? find_held_lock+0x2c/0x110 [ 31.083114] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.083745] ? lock_is_held_type+0x9f/0x120 [ 31.084347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.085009] ? mtree_range_walk+0x632/0x900 [ 31.085620] ? mas_walk+0x5c7/0x7c0 [ 31.086144] do_vmi_munmap+0x1f1/0x2b0 [ 31.086700] mmap_region+0x1f9/0x2660 [ 31.087243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.087814] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.088600] ? __pfx_lock_acquire+0x10/0x10 [ 31.089190] ? __pfx_mmap_region+0x10/0x10 [ 31.089789] ? security_mmap_addr+0x7d/0xa0 [ 31.090376] ? get_unmapped_area+0x1f5/0x3f0 [ 31.090995] do_mmap+0x854/0xf00 [ 31.091483] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.092030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.092657] ksys_mmap_pgoff+0x3af/0x500 [ 31.093216] do_syscall_64+0x3f/0x90 [ 31.093760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094482] RIP: 0033:0x7ff2fa06cd82 [ 31.095010] 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 [ 31.097367] RSP: 002b:00007fffa0bd0458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.098368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2fa06cd82 [ 31.099318] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2f94a6000 [ 31.100277] RBP: 00007ff2f94a6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.101242] R10: 0000000000000812 R11: 0000000000000206 R12: 000056092ad9f980 [ 31.102193] R13: 00007fffa0bd0470 R14: 00007fffa0bd04a0 R15: 00007fffa0bd0800 [ 31.103155] [ 31.103462] [ 31.103689] Allocated by task 215: [ 31.104138] kasan_save_stack+0x22/0x50 [ 31.104672] kasan_set_track+0x25/0x30 [ 31.105188] __kasan_slab_alloc+0x59/0x70 [ 31.105741] kmem_cache_alloc+0x16b/0x370 [ 31.106289] vm_area_dup+0x20/0x160 [ 31.106766] __split_vma+0x170/0x950 [ 31.107278] split_vma+0xc6/0x110 [ 31.107742] mprotect_fixup+0x8d2/0xb30 [ 31.108272] do_mprotect_pkey+0x87e/0xd40 [ 31.108817] __x64_sys_mprotect+0x78/0xc0 [ 31.109362] do_syscall_64+0x3f/0x90 [ 31.109861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.110537] [ 31.110762] Freed by task 215: [ 31.111180] kasan_save_stack+0x22/0x50 [ 31.111710] kasan_set_track+0x25/0x30 [ 31.112229] kasan_save_free_info+0x2b/0x50 [ 31.112803] __kasan_slab_free+0x10a/0x190 [ 31.113374] kmem_cache_free+0x10d/0x4d0 [ 31.113983] rcu_core+0x8c8/0x2860 [ 31.114466] __do_softirq+0x1b7/0x7d4 [ 31.114998] [ 31.115227] Last potentially related work creation: [ 31.115854] kasan_save_stack+0x22/0x50 [ 31.116398] __kasan_record_aux_stack+0x8e/0xa0 [ 31.117012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.117693] remove_vma+0x139/0x170 [ 31.118175] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.118770] do_vmi_munmap+0x1f1/0x2b0 [ 31.119293] __vm_munmap+0x138/0x3a0 [ 31.119789] __x64_sys_munmap+0x59/0x80 [ 31.120343] do_syscall_64+0x3f/0x90 [ 31.120853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121545] [ 31.121774] The buggy address belongs to the object at ffff888010322828 [ 31.121774] which belongs to the cache vm_area_struct of size 168 [ 31.123358] The buggy address is located 88 bytes inside of [ 31.123358] freed 168-byte region [ffff888010322828, ffff8880103228d0) [ 31.124864] [ 31.125100] The buggy address belongs to the physical page: [ 31.125811] page:0000000015f9d24c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10322 [ 31.126983] memcg:ffff8880177f9701 [ 31.127444] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.128135] page_type: 0xffffffff() [ 31.128624] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.129616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880177f9701 [ 31.130584] page dumped because: kasan: bad access detected [ 31.131294] [ 31.131528] Memory state around the buggy address: [ 31.132148] ffff888010322780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.133069] ffff888010322800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.133986] >ffff888010322880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.134915] ^ [ 31.135360] ffff888010322900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.136274] ffff888010322980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.137192] ================================================================== [ 31.138308] Disabling lock debugging due to kernel taint [ 33.160458] BUG: Bad rss-counter state mm:000000001636cdac type:MM_FILEPAGES val:33 [ 33.161565] BUG: Bad rss-counter state mm:000000001636cdac type:MM_ANONPAGES val:22 [ 33.586790] BUG: Bad rss-counter state mm:0000000018e3146c type:MM_FILEPAGES val:33 [ 33.588423] BUG: Bad rss-counter state mm:0000000018e3146c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54008' (ECDSA) to the list of known hosts. 2023/06/21 10:36:19 fuzzer started 2023/06/21 10:36:20 dialing manager at localhost:36067 2023/06/21 10:36:20 checking machine... 2023/06/21 10:36:20 checking revisions... [ 34.226711] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:36:20 testing simple program... [ 34.276213] cgroup: Unknown subsys name 'net' [ 34.318726] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:36:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800cba3d58 RCX=ffffffff812e0135 RDX=1ffff110019747ab RSI=ffffffff87b89f80 RDI=ffff88800dcb5180 RBP=ffff888018900ab0 RSP=ffff88806ce09e08 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=0000000000000000 R12=0000000000000283 R13=ffff88800dcb5178 R14=ffffffff813782f8 R15=ffff88800da10980 RIP=ffffffff84519679 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 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=00007f1032083998 CR3=00000000188c6000 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=2039313a36333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a36333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000008 RCX=ffffffff84498fb7 RDX=0000000000000009 RSI=0000000000000008 RDI=0000000000000004 RBP=0000000000000004 RSP=ffff888015c275c8 R8 =0000000000000004 R9 =0000000000000008 R10=0000000000000009 R11=ffff88800c701658 R12=ffff888015c27708 R13=0000000000000008 R14=0000000000000009 R15=0000000000000003 RIP=ffffffff814c0250 RFL=00000297 [--S-APC] 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 00007faabef4a900 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=00007faabeef4008 CR3=0000000014648000 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