syzkaller login: [ 31.343719] BUG: Bad rss-counter state mm:000000002c4c8e4c type:MM_FILEPAGES val:33 [ 31.344947] BUG: Bad rss-counter state mm:000000002c4c8e4c type:MM_ANONPAGES val:22 [ 31.509818] ================================================================== [ 31.510847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.511949] Read of size 8 at addr ffff88800da5d880 by task sshd/221 [ 31.512862] [ 31.513236] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.514401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.515677] Call Trace: [ 31.516092] [ 31.516456] dump_stack_lvl+0x91/0xf0 [ 31.517080] print_report+0xcc/0x620 [ 31.517691] ? __virt_addr_valid+0x102/0x340 [ 31.518438] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.519230] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.520039] kasan_report+0xbe/0xf0 [ 31.520654] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.521457] vma_interval_tree_remove+0xc75/0xec0 [ 31.522236] vma_prepare+0xc54/0x11a0 [ 31.522874] __split_vma+0x5af/0x950 [ 31.523483] ? __pfx___split_vma+0x10/0x10 [ 31.524160] ? find_held_lock+0x2c/0x110 [ 31.524833] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.525571] ? lock_is_held_type+0x9f/0x120 [ 31.526272] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.527099] ? mtree_range_walk+0x632/0x900 [ 31.527811] ? mas_walk+0x5c7/0x7c0 [ 31.528418] do_vmi_munmap+0x1f1/0x2b0 [ 31.529063] mmap_region+0x1f9/0x2660 [ 31.529664] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.530181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.530909] ? __pfx_lock_acquire+0x10/0x10 [ 31.531443] ? __pfx_mmap_region+0x10/0x10 [ 31.531973] ? security_mmap_addr+0x7d/0xa0 [ 31.532557] ? get_unmapped_area+0x1f5/0x3f0 [ 31.533191] do_mmap+0x854/0xf00 [ 31.533705] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.534294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.534975] ksys_mmap_pgoff+0x3af/0x500 [ 31.535580] do_syscall_64+0x3f/0x90 [ 31.536113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.536824] RIP: 0033:0x7f7099ee3d82 [ 31.537317] 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 [ 31.539711] RSP: 002b:00007fff8f694a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.540748] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7099ee3d82 [ 31.541719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f709931d000 [ 31.542711] RBP: 00007f709931d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.543655] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562dcddf6f70 [ 31.544627] R13: 00007fff8f694a90 R14: 00007fff8f694ac0 R15: 00007fff8f694e20 [ 31.545580] [ 31.545930] [ 31.546161] Allocated by task 214: [ 31.546638] kasan_save_stack+0x22/0x50 [ 31.547200] kasan_set_track+0x25/0x30 [ 31.547740] __kasan_slab_alloc+0x59/0x70 [ 31.548303] kmem_cache_alloc+0x16b/0x370 [ 31.548877] vm_area_dup+0x20/0x160 [ 31.549381] __split_vma+0x170/0x950 [ 31.549903] split_vma+0xc6/0x110 [ 31.550389] mprotect_fixup+0x8d2/0xb30 [ 31.550959] do_mprotect_pkey+0x87e/0xd40 [ 31.551519] __x64_sys_mprotect+0x78/0xc0 [ 31.552099] do_syscall_64+0x3f/0x90 [ 31.552607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.553324] [ 31.553566] Freed by task 214: [ 31.554059] kasan_save_stack+0x22/0x50 [ 31.554728] kasan_set_track+0x25/0x30 [ 31.555285] kasan_save_free_info+0x2b/0x50 [ 31.555880] __kasan_slab_free+0x10a/0x190 [ 31.556462] kmem_cache_free+0x10d/0x4d0 [ 31.557029] rcu_core+0x8c8/0x2860 [ 31.557506] __do_softirq+0x1b7/0x7d4 [ 31.558031] [ 31.558258] Last potentially related work creation: [ 31.558918] kasan_save_stack+0x22/0x50 [ 31.559468] __kasan_record_aux_stack+0x8e/0xa0 [ 31.560108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.560811] remove_vma+0x139/0x170 [ 31.561302] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.561904] do_vmi_munmap+0x1f1/0x2b0 [ 31.562430] __vm_munmap+0x138/0x3a0 [ 31.562945] __x64_sys_munmap+0x59/0x80 [ 31.563484] do_syscall_64+0x3f/0x90 [ 31.564012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.564693] [ 31.564938] The buggy address belongs to the object at ffff88800da5d828 [ 31.564938] which belongs to the cache vm_area_struct of size 168 [ 31.566581] The buggy address is located 88 bytes inside of [ 31.566581] freed 168-byte region [ffff88800da5d828, ffff88800da5d8d0) [ 31.568108] [ 31.568343] The buggy address belongs to the physical page: [ 31.569083] page:00000000a8d051b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda5d [ 31.570282] memcg:ffff88800e199f01 [ 31.570757] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.571455] page_type: 0xffffffff() [ 31.571967] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.572993] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e199f01 [ 31.573986] page dumped because: kasan: bad access detected [ 31.574683] [ 31.574921] Memory state around the buggy address: [ 31.575555] ffff88800da5d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.576514] ffff88800da5d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.577457] >ffff88800da5d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.578428] ^ [ 31.578889] ffff88800da5d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.579827] ffff88800da5d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.580726] ================================================================== [ 31.581765] Disabling lock debugging due to kernel taint [ 33.727234] BUG: Bad rss-counter state mm:000000003bf6c0c7 type:MM_FILEPAGES val:33 [ 33.728250] BUG: Bad rss-counter state mm:000000003bf6c0c7 type:MM_ANONPAGES val:22 [ 34.222858] BUG: Bad rss-counter state mm:000000005cad1172 type:MM_FILEPAGES val:33 [ 34.224048] BUG: Bad rss-counter state mm:000000005cad1172 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36689' (ECDSA) to the list of known hosts. 2023/06/19 18:20:17 fuzzer started 2023/06/19 18:20:17 dialing manager at localhost:44161 2023/06/19 18:20:17 checking machine... 2023/06/19 18:20:17 checking revisions... [ 34.989513] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:20:17 testing simple program... [ 35.040493] cgroup: Unknown subsys name 'net' [ 35.097680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:20:17 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=0000000000000000 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800db47648 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000200 R13=ffff88800e0b8880 R14=0000000000400cc0 R15=0000000000000001 RIP=ffffffff8180efaf RFL=00000046 [---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 00007f5563e2c900 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=00007f55632bae50 CR3=000000000cac0000 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=2037313a30323a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a30323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028faeb4 RSI=ffffffff83677d2f RDI=ffff8880147d7610 RBP=ffff8880147d75e0 RSP=ffff8880147d7540 R8 =0000000000000001 R9 =ffff8880147d7588 R10=0000000000038001 R11=0000000000020d06 R12=ffff8880147d7610 R13=0000000000000000 R14=ffff888018261b40 R15=00000000000000a4 RIP=ffffffff813ad42e 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 00007fe1c32a5900 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=00007ffef3e0a000 CR3=000000000ed92000 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