syzkaller login: [ 30.449411] BUG: Bad rss-counter state mm:000000002ed90cfc type:MM_FILEPAGES val:33 [ 30.450214] BUG: Bad rss-counter state mm:000000002ed90cfc type:MM_ANONPAGES val:22 [ 30.578764] ================================================================== [ 30.579386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.579995] Read of size 8 at addr ffff888019cb5058 by task sshd/220 [ 30.580553] [ 30.580695] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.581246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.581892] Call Trace: [ 30.582113] [ 30.582304] dump_stack_lvl+0x91/0xf0 [ 30.582629] print_report+0xcc/0x620 [ 30.582957] ? __virt_addr_valid+0x102/0x340 [ 30.583649] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.584046] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.584488] kasan_report+0xbe/0xf0 [ 30.584798] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.585206] vma_interval_tree_remove+0xc75/0xec0 [ 30.585588] vma_prepare+0xc54/0x11a0 [ 30.585899] __split_vma+0x5af/0x950 [ 30.586201] ? __pfx___split_vma+0x10/0x10 [ 30.586571] ? find_held_lock+0x2c/0x110 [ 30.586941] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.587340] ? lock_is_held_type+0x9f/0x120 [ 30.587715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.588125] ? mtree_range_walk+0x632/0x900 [ 30.588575] ? mas_walk+0x5c7/0x7c0 [ 30.588900] do_vmi_munmap+0x1f1/0x2b0 [ 30.589223] mmap_region+0x1f9/0x2660 [ 30.589528] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.589858] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.590337] ? __pfx_lock_acquire+0x10/0x10 [ 30.590718] ? __pfx_mmap_region+0x10/0x10 [ 30.591086] ? security_mmap_addr+0x7d/0xa0 [ 30.591500] ? get_unmapped_area+0x1f5/0x3f0 [ 30.591864] do_mmap+0x854/0xf00 [ 30.592163] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.592547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.592953] ksys_mmap_pgoff+0x3af/0x500 [ 30.593312] do_syscall_64+0x3f/0x90 [ 30.593648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.594092] RIP: 0033:0x7f5a14842d82 [ 30.594408] 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 [ 30.595891] RSP: 002b:00007ffebbbbd718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.596533] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a14842d82 [ 30.597110] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a13c7c000 [ 30.597764] RBP: 00007f5a13c7c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.598362] R10: 0000000000000812 R11: 0000000000000206 R12: 000055975da55b20 [ 30.598959] R13: 00007ffebbbbd730 R14: 00007ffebbbbd760 R15: 00007ffebbbbdac0 [ 30.599576] [ 30.599781] [ 30.599931] Allocated by task 213: [ 30.600244] kasan_save_stack+0x22/0x50 [ 30.600671] kasan_set_track+0x25/0x30 [ 30.601013] __kasan_slab_alloc+0x59/0x70 [ 30.601381] kmem_cache_alloc+0x16b/0x370 [ 30.601743] vm_area_dup+0x20/0x160 [ 30.602075] __split_vma+0x170/0x950 [ 30.602438] split_vma+0xc6/0x110 [ 30.602736] mprotect_fixup+0x8d2/0xb30 [ 30.603085] do_mprotect_pkey+0x87e/0xd40 [ 30.603447] __x64_sys_mprotect+0x78/0xc0 [ 30.603833] do_syscall_64+0x3f/0x90 [ 30.604160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.604647] [ 30.604798] Freed by task 213: [ 30.605073] kasan_save_stack+0x22/0x50 [ 30.605430] kasan_set_track+0x25/0x30 [ 30.605775] kasan_save_free_info+0x2b/0x50 [ 30.606160] __kasan_slab_free+0x10a/0x190 [ 30.606531] kmem_cache_free+0x10d/0x4d0 [ 30.606882] rcu_core+0x8c8/0x2860 [ 30.607180] __do_softirq+0x1b7/0x7d4 [ 30.607500] [ 30.607665] Last potentially related work creation: [ 30.608057] kasan_save_stack+0x22/0x50 [ 30.608456] __kasan_record_aux_stack+0x8e/0xa0 [ 30.608827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.609265] remove_vma+0x139/0x170 [ 30.609592] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.609971] do_vmi_munmap+0x1f1/0x2b0 [ 30.610305] __vm_munmap+0x138/0x3a0 [ 30.610637] __x64_sys_munmap+0x59/0x80 [ 30.611000] do_syscall_64+0x3f/0x90 [ 30.611345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.611795] [ 30.611946] The buggy address belongs to the object at ffff888019cb5000 [ 30.611946] which belongs to the cache vm_area_struct of size 168 [ 30.612993] The buggy address is located 88 bytes inside of [ 30.612993] freed 168-byte region [ffff888019cb5000, ffff888019cb50a8) [ 30.613975] [ 30.614126] The buggy address belongs to the physical page: [ 30.614573] page:000000001ee8b869 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cb5 [ 30.615348] memcg:ffff888019cb0101 [ 30.615656] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.616104] page_type: 0xffffffff() [ 30.616449] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.617126] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cb0101 [ 30.617776] page dumped because: kasan: bad access detected [ 30.618236] [ 30.618389] Memory state around the buggy address: [ 30.618809] ffff888019cb4f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.619397] ffff888019cb4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.619982] >ffff888019cb5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.620633] ^ [ 30.621141] ffff888019cb5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.621731] ffff888019cb5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.622330] ================================================================== [ 30.623047] Disabling lock debugging due to kernel taint [ 32.017183] BUG: Bad rss-counter state mm:000000008d9cfab6 type:MM_FILEPAGES val:33 [ 32.017904] BUG: Bad rss-counter state mm:000000008d9cfab6 type:MM_ANONPAGES val:22 [ 32.440807] BUG: Bad rss-counter state mm:00000000cca85d94 type:MM_FILEPAGES val:33 [ 32.441536] BUG: Bad rss-counter state mm:00000000cca85d94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55412' (ECDSA) to the list of known hosts. 2023/06/21 09:45:37 fuzzer started 2023/06/21 09:45:37 dialing manager at localhost:36067 2023/06/21 09:45:37 checking machine... 2023/06/21 09:45:37 checking revisions... [ 32.951006] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:45:37 testing simple program... [ 32.992646] cgroup: Unknown subsys name 'net' [ 33.048352] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652d08 RCX=0000000000000000 RDX=ffff88800dca8000 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880102cf398 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=000000000000001e RIP=ffffffff814c8562 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 00007fe2108af700 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=00007f983fb8d000 CR3=000000000de3a000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34383430362074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343834 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015ac0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015abfd01 RSI=ffff888015abfdc8 RDI=ffff888015abf6a8 RBP=ffff888015abf6f0 RSP=ffff888015abf628 R8 =ffffffff861295f6 R9 =ffff888015abf6d8 R10=0000000000038001 R11=000000000001e427 R12=ffff888015abf6f8 R13=ffff888015abf6e0 R14=ffff888015abfdd0 R15=ffff888015abf698 RIP=ffffffff81131028 RFL=00000282 [--S----] 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 00007fa4ffee8900 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=00007fa4ffec7020 CR3=000000000dd7c000 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