syzkaller login: [ 31.481520] BUG: Bad rss-counter state mm:00000000539fe308 type:MM_FILEPAGES val:33 [ 31.482246] BUG: Bad rss-counter state mm:00000000539fe308 type:MM_ANONPAGES val:22 [ 31.594996] ================================================================== [ 31.596064] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.597292] Read of size 8 at addr ffff88800ed394e0 by task sshd/220 [ 31.598121] [ 31.598238] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.598688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.599203] Call Trace: [ 31.599385] [ 31.599536] dump_stack_lvl+0x91/0xf0 [ 31.599799] print_report+0xcc/0x620 [ 31.600057] ? __virt_addr_valid+0x102/0x340 [ 31.600350] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600674] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.601005] kasan_report+0xbe/0xf0 [ 31.601267] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.601594] vma_interval_tree_remove+0xc75/0xec0 [ 31.601912] vma_prepare+0xc54/0x11a0 [ 31.602167] __split_vma+0x5af/0x950 [ 31.602418] ? __pfx___split_vma+0x10/0x10 [ 31.602697] ? find_held_lock+0x2c/0x110 [ 31.602975] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.603274] ? lock_is_held_type+0x9f/0x120 [ 31.603560] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.603880] ? mtree_range_walk+0x632/0x900 [ 31.604174] ? mas_walk+0x5c7/0x7c0 [ 31.604426] do_vmi_munmap+0x1f1/0x2b0 [ 31.604687] mmap_region+0x1f9/0x2660 [ 31.604947] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.605238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.605620] ? __pfx_lock_acquire+0x10/0x10 [ 31.605905] ? __pfx_mmap_region+0x10/0x10 [ 31.606189] ? security_mmap_addr+0x7d/0xa0 [ 31.606476] ? get_unmapped_area+0x1f5/0x3f0 [ 31.606769] do_mmap+0x854/0xf00 [ 31.607005] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.607272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.607568] ksys_mmap_pgoff+0x3af/0x500 [ 31.607837] do_syscall_64+0x3f/0x90 [ 31.608094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.608440] RIP: 0033:0x7f25e7492d82 [ 31.608682] 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 [ 31.609822] RSP: 002b:00007ffd8d77d488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.610301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25e7492d82 [ 31.610746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25e68cc000 [ 31.611191] RBP: 00007f25e68cc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.611638] R10: 0000000000000812 R11: 0000000000000206 R12: 000055831972bec0 [ 31.612083] R13: 00007ffd8d77d4a0 R14: 00007ffd8d77d4d0 R15: 00007ffd8d77d830 [ 31.612541] [ 31.612695] [ 31.612810] Allocated by task 213: [ 31.613044] kasan_save_stack+0x22/0x50 [ 31.613315] kasan_set_track+0x25/0x30 [ 31.613576] __kasan_slab_alloc+0x59/0x70 [ 31.613856] kmem_cache_alloc+0x16b/0x370 [ 31.614132] vm_area_dup+0x20/0x160 [ 31.614376] __split_vma+0x170/0x950 [ 31.614623] split_vma+0xc6/0x110 [ 31.614860] mprotect_fixup+0x8d2/0xb30 [ 31.615124] do_mprotect_pkey+0x87e/0xd40 [ 31.615404] __x64_sys_mprotect+0x78/0xc0 [ 31.615679] do_syscall_64+0x3f/0x90 [ 31.615930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.616274] [ 31.616389] Freed by task 13: [ 31.616594] kasan_save_stack+0x22/0x50 [ 31.616860] kasan_set_track+0x25/0x30 [ 31.617129] kasan_save_free_info+0x2b/0x50 [ 31.617414] __kasan_slab_free+0x10a/0x190 [ 31.617696] kmem_cache_free+0x10d/0x4d0 [ 31.617965] rcu_core+0x8c8/0x2860 [ 31.618202] __do_softirq+0x1b7/0x7d4 [ 31.618458] [ 31.618572] Last potentially related work creation: [ 31.618881] kasan_save_stack+0x22/0x50 [ 31.619149] __kasan_record_aux_stack+0x8e/0xa0 [ 31.619452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.619791] remove_vma+0x139/0x170 [ 31.620028] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.620324] do_vmi_munmap+0x1f1/0x2b0 [ 31.620582] __vm_munmap+0x138/0x3a0 [ 31.620836] __x64_sys_munmap+0x59/0x80 [ 31.621115] do_syscall_64+0x3f/0x90 [ 31.621367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.621708] [ 31.621823] Second to last potentially related work creation: [ 31.622185] kasan_save_stack+0x22/0x50 [ 31.622455] __kasan_record_aux_stack+0x8e/0xa0 [ 31.622756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.623096] remove_vma+0x139/0x170 [ 31.623338] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.623636] do_vmi_munmap+0x1f1/0x2b0 [ 31.623894] mmap_region+0x1f9/0x2660 [ 31.624148] do_mmap+0x854/0xf00 [ 31.624379] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.624641] ksys_mmap_pgoff+0x3af/0x500 [ 31.624909] do_syscall_64+0x3f/0x90 [ 31.625166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.625508] [ 31.625625] The buggy address belongs to the object at ffff88800ed39488 [ 31.625625] which belongs to the cache vm_area_struct of size 168 [ 31.626395] The buggy address is located 88 bytes inside of [ 31.626395] freed 168-byte region [ffff88800ed39488, ffff88800ed39530) [ 31.627132] [ 31.627247] The buggy address belongs to the physical page: [ 31.627594] page:0000000080ee30c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed39 [ 31.628167] memcg:ffff888015955e01 [ 31.628392] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.628760] page_type: 0xffffffff() [ 31.629012] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aec80 dead000000000003 [ 31.629504] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015955e01 [ 31.629982] page dumped because: kasan: bad access detected [ 31.630336] [ 31.630451] Memory state around the buggy address: [ 31.630793] ffff88800ed39380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.631307] ffff88800ed39400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.631766] >ffff88800ed39480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.632283] ^ [ 31.632749] ffff88800ed39500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.633284] ffff88800ed39580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.633782] ================================================================== [ 31.634472] Disabling lock debugging due to kernel taint [ 33.456242] BUG: Bad rss-counter state mm:00000000987bfec4 type:MM_FILEPAGES val:33 [ 33.457675] BUG: Bad rss-counter state mm:00000000987bfec4 type:MM_ANONPAGES val:22 [ 33.940702] BUG: Bad rss-counter state mm:000000001092ede4 type:MM_FILEPAGES val:33 [ 33.941762] BUG: Bad rss-counter state mm:000000001092ede4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2742' (ECDSA) to the list of known hosts. 2023/06/20 12:59:03 fuzzer started 2023/06/20 12:59:03 dialing manager at localhost:36067 2023/06/20 12:59:04 checking machine... 2023/06/20 12:59:04 checking revisions... [ 34.592837] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:59:04 testing simple program... [ 34.642666] cgroup: Unknown subsys name 'net' [ 34.680380] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:59:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015bffa88 RCX=0000000000000001 RDX=1ffff11002b7ff64 RSI=ffffffff8186c1ba RDI=ffff888015bffa94 RBP=ffff888015bffb20 RSP=ffff888015bff9a0 R8 =0000000000000001 R9 =ffff888015bffa00 R10=0000000000038001 R11=0000000000038dd2 R12=ffff888015bffa88 R13=0000000000000000 R14=ffff888014651b40 R15=ffff888015d41d80 RIP=ffffffff813ad547 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 00007f139f78d900 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=000055fabee5d318 CR3=0000000016a2e000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff818dae7b RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800e6ffb01 RSI=ffff88800e6ffb08 RDI=ffff88800e6ffb08 RBP=ffff88800e6ff680 RSP=ffff88800e6ff5b0 R8 =ffffffff86157bb0 R9 =ffff88800e6ff668 R10=0000000000038001 R11=0000000000025fc6 R12=ffff88800e6ff688 R13=ffff88800e6ff670 R14=ffff88800e6ffb10 R15=ffff88800e6ff628 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fd5dffff700 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=00007f85a474af40 CR3=00000000166c8000 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=2033303a39353a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a39353a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000