syzkaller login: [ 39.517616] BUG: Bad rss-counter state mm:00000000a6a2039e type:MM_FILEPAGES val:33 [ 39.519023] BUG: Bad rss-counter state mm:00000000a6a2039e type:MM_ANONPAGES val:22 [ 39.673685] ================================================================== [ 39.674592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.675532] Read of size 8 at addr ffff88800c501310 by task sshd/220 [ 39.676314] [ 39.676657] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.677517] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.678497] Call Trace: [ 39.678858] [ 39.679145] dump_stack_lvl+0x91/0xf0 [ 39.679639] print_report+0xcc/0x620 [ 39.680123] ? __virt_addr_valid+0x102/0x340 [ 39.680695] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.681312] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.681945] kasan_report+0xbe/0xf0 [ 39.682423] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.683047] vma_interval_tree_remove+0xc75/0xec0 [ 39.683655] vma_prepare+0xc54/0x11a0 [ 39.684141] __split_vma+0x5af/0x950 [ 39.684631] ? __pfx___split_vma+0x10/0x10 [ 39.685162] ? find_held_lock+0x2c/0x110 [ 39.685687] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.686267] ? lock_is_held_type+0x9f/0x120 [ 39.686814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.687423] ? mtree_range_walk+0x632/0x900 [ 39.687987] ? mas_walk+0x5c7/0x7c0 [ 39.688470] do_vmi_munmap+0x1f1/0x2b0 [ 39.688964] mmap_region+0x1f9/0x2660 [ 39.689453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.689962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.690687] ? __pfx_lock_acquire+0x10/0x10 [ 39.691229] ? __pfx_mmap_region+0x10/0x10 [ 39.691768] ? security_mmap_addr+0x7d/0xa0 [ 39.692321] ? get_unmapped_area+0x1f5/0x3f0 [ 39.692878] do_mmap+0x854/0xf00 [ 39.693326] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.693825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.694391] ksys_mmap_pgoff+0x3af/0x500 [ 39.694904] do_syscall_64+0x3f/0x90 [ 39.695382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.696030] RIP: 0033:0x7fc9a85e7d82 [ 39.696501] 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 [ 39.698653] RSP: 002b:00007fff63058818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.699563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9a85e7d82 [ 39.700424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9a7a21000 [ 39.701281] RBP: 00007fc9a7a21000 R08: 0000000000000009 R09: 0000000000001000 [ 39.702136] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557c14ccb20 [ 39.702995] R13: 00007fff63058830 R14: 00007fff63058860 R15: 00007fff63058bc0 [ 39.703863] [ 39.704159] [ 39.704392] Allocated by task 213: [ 39.704829] kasan_save_stack+0x22/0x50 [ 39.705338] kasan_set_track+0x25/0x30 [ 39.705834] __kasan_slab_alloc+0x59/0x70 [ 39.706361] kmem_cache_alloc+0x16b/0x370 [ 39.706884] vm_area_dup+0x20/0x160 [ 39.707338] __split_vma+0x170/0x950 [ 39.707815] split_vma+0xc6/0x110 [ 39.708265] mprotect_fixup+0x8d2/0xb30 [ 39.708771] do_mprotect_pkey+0x87e/0xd40 [ 39.709296] __x64_sys_mprotect+0x78/0xc0 [ 39.709827] do_syscall_64+0x3f/0x90 [ 39.710301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.710952] [ 39.711169] Freed by task 213: [ 39.711564] kasan_save_stack+0x22/0x50 [ 39.712068] kasan_set_track+0x25/0x30 [ 39.712573] kasan_save_free_info+0x2b/0x50 [ 39.713113] __kasan_slab_free+0x10a/0x190 [ 39.713658] kmem_cache_free+0x10d/0x4d0 [ 39.714171] rcu_core+0x8c8/0x2860 [ 39.714617] __do_softirq+0x1b7/0x7d4 [ 39.715097] [ 39.715311] Last potentially related work creation: [ 39.715897] kasan_save_stack+0x22/0x50 [ 39.716421] __kasan_record_aux_stack+0x8e/0xa0 [ 39.717010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.717664] remove_vma+0x139/0x170 [ 39.718118] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.718684] do_vmi_munmap+0x1f1/0x2b0 [ 39.719168] __vm_munmap+0x138/0x3a0 [ 39.719639] __x64_sys_munmap+0x59/0x80 [ 39.720155] do_syscall_64+0x3f/0x90 [ 39.720640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.721288] [ 39.721505] The buggy address belongs to the object at ffff88800c5012b8 [ 39.721505] which belongs to the cache vm_area_struct of size 168 [ 39.722992] The buggy address is located 88 bytes inside of [ 39.722992] freed 168-byte region [ffff88800c5012b8, ffff88800c501360) [ 39.724440] [ 39.724661] The buggy address belongs to the physical page: [ 39.725324] page:000000002bd3a2dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc501 [ 39.726423] memcg:ffff88800f135301 [ 39.726857] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.727507] page_type: 0xffffffff() [ 39.727972] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.728914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f135301 [ 39.729832] page dumped because: kasan: bad access detected [ 39.730529] [ 39.730753] Memory state around the buggy address: [ 39.731333] ffff88800c501200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.732198] ffff88800c501280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.733135] >ffff88800c501300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.733996] ^ [ 39.734465] ffff88800c501380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.735330] ffff88800c501400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.736202] ================================================================== [ 39.737206] Disabling lock debugging due to kernel taint [ 42.775089] BUG: Bad rss-counter state mm:0000000009ab782a type:MM_FILEPAGES val:33 [ 42.776076] BUG: Bad rss-counter state mm:0000000009ab782a type:MM_ANONPAGES val:22 [ 43.320719] BUG: Bad rss-counter state mm:000000005954f057 type:MM_FILEPAGES val:33 [ 43.321903] BUG: Bad rss-counter state mm:000000005954f057 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31035' (ECDSA) to the list of known hosts. 2023/06/20 06:35:04 fuzzer started 2023/06/20 06:35:04 dialing manager at localhost:44161 2023/06/20 06:35:04 checking machine... 2023/06/20 06:35:04 checking revisions... [ 44.020692] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:35:04 testing simple program... [ 44.071978] cgroup: Unknown subsys name 'net' [ 44.135941] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:03 Registers: info registers vcpu 0 RAX=00007ffc02b8ec80 RBX=00000000000000e1 RCX=00007ffc02b8ed00 RDX=000000000000231c RSI=0000000000000000 RDI=00007ffc02b8ec80 RBP=00000000000000f4 RSP=fffffe0000002fd0 R8 =00007ffc02b93324 R9 =00007ffc02b931e0 R10=00007f654cfcca57 R11=0000000000000000 R12=0000000000000008 R13=00007ffc02b8ec80 R14=00007ffc02b93450 R15=0000000000000452 RIP=ffffffff84601264 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f654c47c900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc02b90f7c CR3=000000000dfd8000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=6e0c33ee3f1562da817f956a383b898e XMM04=6475b974ac4c122a5f6b00250f64cec0 XMM05=00000000000000000000ff0000000000 XMM06=640c33743f15122a5f6b00250f3b898e XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=ffff888008c58400 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=00007f68bcf509b0 CR3=00000000094f2000 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=2033303a35333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a35333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000