syzkaller login: [ 35.293856] BUG: Bad rss-counter state mm:0000000096e0b228 type:MM_FILEPAGES val:33 [ 35.295398] BUG: Bad rss-counter state mm:0000000096e0b228 type:MM_ANONPAGES val:22 [ 35.478551] ================================================================== [ 35.479832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.481053] Read of size 8 at addr ffff888009e8aed8 by task sshd/220 [ 35.482069] [ 35.482354] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.483484] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.484753] Call Trace: [ 35.485169] [ 35.485540] dump_stack_lvl+0x91/0xf0 [ 35.486208] print_report+0xcc/0x620 [ 35.486844] ? __virt_addr_valid+0x102/0x340 [ 35.487561] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.488395] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.489222] kasan_report+0xbe/0xf0 [ 35.489882] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.490719] vma_interval_tree_remove+0xc75/0xec0 [ 35.491536] vma_prepare+0xc54/0x11a0 [ 35.492195] __split_vma+0x5af/0x950 [ 35.492832] ? __pfx___split_vma+0x10/0x10 [ 35.493538] ? find_held_lock+0x2c/0x110 [ 35.494270] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.495023] ? lock_is_held_type+0x9f/0x120 [ 35.495754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.496567] ? mtree_range_walk+0x632/0x900 [ 35.497315] ? mas_walk+0x5c7/0x7c0 [ 35.497961] do_vmi_munmap+0x1f1/0x2b0 [ 35.498628] mmap_region+0x1f9/0x2660 [ 35.499276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.499975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.500933] ? __pfx_lock_acquire+0x10/0x10 [ 35.501653] ? __pfx_mmap_region+0x10/0x10 [ 35.502386] ? security_mmap_addr+0x7d/0xa0 [ 35.503103] ? get_unmapped_area+0x1f5/0x3f0 [ 35.503850] do_mmap+0x854/0xf00 [ 35.504445] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.505114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.505887] ksys_mmap_pgoff+0x3af/0x500 [ 35.506578] do_syscall_64+0x3f/0x90 [ 35.507220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.508095] RIP: 0033:0x7f6feee8cd82 [ 35.508713] 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 [ 35.511142] RSP: 002b:00007ffdf6d82fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.512045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6feee8cd82 [ 35.512887] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6fee2c6000 [ 35.513727] RBP: 00007f6fee2c6000 R08: 0000000000000009 R09: 0000000000001000 [ 35.514566] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e4e2f4ec0 [ 35.515403] R13: 00007ffdf6d82fd0 R14: 00007ffdf6d83000 R15: 00007ffdf6d83360 [ 35.516252] [ 35.516540] [ 35.516752] Allocated by task 213: [ 35.517184] kasan_save_stack+0x22/0x50 [ 35.517683] kasan_set_track+0x25/0x30 [ 35.518197] __kasan_slab_alloc+0x59/0x70 [ 35.518713] kmem_cache_alloc+0x16b/0x370 [ 35.519227] vm_area_dup+0x20/0x160 [ 35.519679] __split_vma+0x170/0x950 [ 35.520139] split_vma+0xc6/0x110 [ 35.520574] mprotect_fixup+0x8d2/0xb30 [ 35.521070] do_mprotect_pkey+0x87e/0xd40 [ 35.521586] __x64_sys_mprotect+0x78/0xc0 [ 35.522116] do_syscall_64+0x3f/0x90 [ 35.522592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.523234] [ 35.523447] Freed by task 213: [ 35.523838] kasan_save_stack+0x22/0x50 [ 35.524343] kasan_set_track+0x25/0x30 [ 35.524836] kasan_save_free_info+0x2b/0x50 [ 35.525364] __kasan_slab_free+0x10a/0x190 [ 35.525913] kmem_cache_free+0x10d/0x4d0 [ 35.526422] rcu_core+0x8c8/0x2860 [ 35.526861] __do_softirq+0x1b7/0x7d4 [ 35.527342] [ 35.527559] Last potentially related work creation: [ 35.528142] kasan_save_stack+0x22/0x50 [ 35.528645] __kasan_record_aux_stack+0x8e/0xa0 [ 35.529221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.529873] remove_vma+0x139/0x170 [ 35.530329] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.530891] do_vmi_munmap+0x1f1/0x2b0 [ 35.531381] __vm_munmap+0x138/0x3a0 [ 35.531847] __x64_sys_munmap+0x59/0x80 [ 35.532351] do_syscall_64+0x3f/0x90 [ 35.532820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.533455] [ 35.533668] The buggy address belongs to the object at ffff888009e8ae80 [ 35.533668] which belongs to the cache vm_area_struct of size 168 [ 35.535160] The buggy address is located 88 bytes inside of [ 35.535160] freed 168-byte region [ffff888009e8ae80, ffff888009e8af28) [ 35.536552] [ 35.536768] The buggy address belongs to the physical page: [ 35.537427] page:00000000513af733 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9e8a [ 35.538506] memcg:ffff888009e88101 [ 35.538926] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.539567] page_type: 0xffffffff() [ 35.540014] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.540927] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009e88101 [ 35.541844] page dumped because: kasan: bad access detected [ 35.542510] [ 35.542726] Memory state around the buggy address: [ 35.543300] ffff888009e8ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.544166] ffff888009e8ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.545018] >ffff888009e8ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.545865] ^ [ 35.546587] ffff888009e8af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.547447] ffff888009e8af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.548290] ================================================================== [ 35.549323] Disabling lock debugging due to kernel taint [ 38.358225] BUG: Bad rss-counter state mm:0000000050a08642 type:MM_FILEPAGES val:33 [ 38.359238] BUG: Bad rss-counter state mm:0000000050a08642 type:MM_ANONPAGES val:22 [ 38.934233] BUG: Bad rss-counter state mm:00000000c94664cf type:MM_FILEPAGES val:33 [ 38.935432] BUG: Bad rss-counter state mm:00000000c94664cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13441' (ECDSA) to the list of known hosts. 2023/06/20 01:28:05 fuzzer started 2023/06/20 01:28:05 dialing manager at localhost:44161 2023/06/20 01:28:05 checking machine... 2023/06/20 01:28:05 checking revisions... [ 39.598028] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:28:06 testing simple program... [ 39.658776] cgroup: Unknown subsys name 'net' [ 39.705620] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:28:00 Registers: info registers vcpu 0 RAX=0000000000000400 RBX=ffff88800ee7a000 RCX=0000000000007d40 RDX=0000000000007d00 RSI=0000000000000dc0 RDI=0000000000007d00 RBP=ffff88800f2efcd8 RSP=ffff88800f2efc80 R8 =ffff88800ee7b000 R9 =000000000003d0e0 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008442000 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180ad9c 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 00007f9d7a034900 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=00007f9d7a5eb618 CR3=00000000165f2000 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=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=00007f9d7a5ec0b0 CR3=00000000165f2000 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=38323a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303936 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000