syzkaller login: [ 28.769749] BUG: Bad rss-counter state mm:00000000aa174f1d type:MM_FILEPAGES val:33 [ 28.770954] BUG: Bad rss-counter state mm:00000000aa174f1d type:MM_ANONPAGES val:22 [ 28.909747] ================================================================== [ 28.910634] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.911573] Read of size 8 at addr ffff8880159fa058 by task sshd/220 [ 28.912419] [ 28.912639] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.913501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.914466] Call Trace: [ 28.914784] [ 28.915067] dump_stack_lvl+0x91/0xf0 [ 28.915559] print_report+0xcc/0x620 [ 28.916044] ? __virt_addr_valid+0x102/0x340 [ 28.916634] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.917250] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.917859] kasan_report+0xbe/0xf0 [ 28.918331] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.918958] vma_interval_tree_remove+0xc75/0xec0 [ 28.919557] vma_prepare+0xc54/0x11a0 [ 28.920036] __split_vma+0x5af/0x950 [ 28.920521] ? __pfx___split_vma+0x10/0x10 [ 28.921044] ? find_held_lock+0x2c/0x110 [ 28.921564] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.922130] ? lock_is_held_type+0x9f/0x120 [ 28.922666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.923268] ? mtree_range_walk+0x632/0x900 [ 28.923817] ? mas_walk+0x5c7/0x7c0 [ 28.924298] do_vmi_munmap+0x1f1/0x2b0 [ 28.924792] mmap_region+0x1f9/0x2660 [ 28.925277] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.925780] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.926496] ? __pfx_lock_acquire+0x10/0x10 [ 28.927023] ? __pfx_mmap_region+0x10/0x10 [ 28.927552] ? security_mmap_addr+0x7d/0xa0 [ 28.928076] ? get_unmapped_area+0x1f5/0x3f0 [ 28.928640] do_mmap+0x854/0xf00 [ 28.929088] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.929577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.930137] ksys_mmap_pgoff+0x3af/0x500 [ 28.930645] do_syscall_64+0x3f/0x90 [ 28.931128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.931777] RIP: 0033:0x7f6cc43f6d82 [ 28.932232] 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 [ 28.934351] RSP: 002b:00007ffcc89354b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.935251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cc43f6d82 [ 28.936115] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cc3830000 [ 28.937020] RBP: 00007f6cc3830000 R08: 0000000000000009 R09: 0000000000001000 [ 28.937864] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f28a9eec0 [ 28.938702] R13: 00007ffcc89354d0 R14: 00007ffcc8935500 R15: 00007ffcc8935860 [ 28.939561] [ 28.939854] [ 28.940070] Allocated by task 213: [ 28.940507] kasan_save_stack+0x22/0x50 [ 28.941013] kasan_set_track+0x25/0x30 [ 28.941507] __kasan_slab_alloc+0x59/0x70 [ 28.942028] kmem_cache_alloc+0x16b/0x370 [ 28.942546] vm_area_dup+0x20/0x160 [ 28.942998] __split_vma+0x170/0x950 [ 28.943461] split_vma+0xc6/0x110 [ 28.943899] mprotect_fixup+0x8d2/0xb30 [ 28.944412] do_mprotect_pkey+0x87e/0xd40 [ 28.944920] __x64_sys_mprotect+0x78/0xc0 [ 28.945437] do_syscall_64+0x3f/0x90 [ 28.945906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.946539] [ 28.946753] Freed by task 213: [ 28.947140] kasan_save_stack+0x22/0x50 [ 28.947642] kasan_set_track+0x25/0x30 [ 28.948133] kasan_save_free_info+0x2b/0x50 [ 28.948678] __kasan_slab_free+0x10a/0x190 [ 28.949208] kmem_cache_free+0x10d/0x4d0 [ 28.949707] rcu_core+0x8c8/0x2860 [ 28.950155] __do_softirq+0x1b7/0x7d4 [ 28.950632] [ 28.950847] Last potentially related work creation: [ 28.951434] kasan_save_stack+0x22/0x50 [ 28.951938] __kasan_record_aux_stack+0x8e/0xa0 [ 28.952516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.953156] remove_vma+0x139/0x170 [ 28.953610] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.954176] do_vmi_munmap+0x1f1/0x2b0 [ 28.954659] __vm_munmap+0x138/0x3a0 [ 28.955128] __x64_sys_munmap+0x59/0x80 [ 28.955624] do_syscall_64+0x3f/0x90 [ 28.956098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.956759] [ 28.956974] The buggy address belongs to the object at ffff8880159fa000 [ 28.956974] which belongs to the cache vm_area_struct of size 168 [ 28.958422] The buggy address is located 88 bytes inside of [ 28.958422] freed 168-byte region [ffff8880159fa000, ffff8880159fa0a8) [ 28.959828] [ 28.960043] The buggy address belongs to the physical page: [ 28.960703] page:00000000ee75f21c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159fa [ 28.961797] memcg:ffff888019939501 [ 28.962221] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.962871] page_type: 0xffffffff() [ 28.963326] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.964262] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019939501 [ 28.965168] page dumped because: kasan: bad access detected [ 28.965834] [ 28.966048] Memory state around the buggy address: [ 28.966620] ffff8880159f9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.967482] ffff8880159f9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.968342] >ffff8880159fa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.969204] ^ [ 28.969954] ffff8880159fa080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.970806] ffff8880159fa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.971656] ================================================================== [ 28.972725] Disabling lock debugging due to kernel taint [ 30.865413] BUG: Bad rss-counter state mm:00000000f4202fdb type:MM_FILEPAGES val:33 [ 30.866967] BUG: Bad rss-counter state mm:00000000f4202fdb type:MM_ANONPAGES val:22 [ 31.318854] BUG: Bad rss-counter state mm:00000000dc6be983 type:MM_FILEPAGES val:33 [ 31.319922] BUG: Bad rss-counter state mm:00000000dc6be983 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7893' (ECDSA) to the list of known hosts. 2023/06/21 01:02:55 fuzzer started 2023/06/21 01:02:55 dialing manager at localhost:36067 2023/06/21 01:02:55 checking machine... 2023/06/21 01:02:55 checking revisions... [ 32.023947] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:02:55 testing simple program... [ 32.070219] cgroup: Unknown subsys name 'net' [ 32.122897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:02:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f108bb56000 CR3=000000000d91e000 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=fa255ef056c3eebc0a4b314e5eea0e68 XMM02=000000000011d480eff9b2d0a8fce9cb XMM03=000000000011d5502c67c8bc2e329bc3 XMM04=24a3a2f93ab5649100000000000ae988 XMM05=35c94cf1d59862cb0000000000132508 XMM06=4fda316b135da52b0000000000131930 XMM07=e042d86d42eb936e0000000000121dd0 XMM08=b2526829992538e6000000000011d550 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000002 RDX=1ffff1100d9e134c RSI=ffff88806cf09de0 RDI=ffff88806cf09a60 RBP=ffff88806cf09de0 RSP=ffff88806cf099a8 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fc0c R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09de0 R15=ffff88806cf09a50 RIP=ffffffff8113046e 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 00007f8183bad900 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=00007fffd2767000 CR3=000000000efd0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000