syzkaller login: [ 30.595142] BUG: Bad rss-counter state mm:00000000f3cc4ff4 type:MM_FILEPAGES val:33 [ 30.596160] BUG: Bad rss-counter state mm:00000000f3cc4ff4 type:MM_ANONPAGES val:22 [ 30.769126] ================================================================== [ 30.770201] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.771210] Read of size 8 at addr ffff88800f16e228 by task sshd/221 [ 30.772165] [ 30.772404] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.773355] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.774470] Call Trace: [ 30.774814] [ 30.775119] dump_stack_lvl+0x91/0xf0 [ 30.775639] print_report+0xcc/0x620 [ 30.776160] ? __virt_addr_valid+0x102/0x340 [ 30.776751] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777435] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778095] kasan_report+0xbe/0xf0 [ 30.778609] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779276] vma_interval_tree_remove+0xc75/0xec0 [ 30.779920] vma_prepare+0xc54/0x11a0 [ 30.780433] __split_vma+0x5af/0x950 [ 30.780948] ? __pfx___split_vma+0x10/0x10 [ 30.781510] ? find_held_lock+0x2c/0x110 [ 30.782078] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.782698] ? lock_is_held_type+0x9f/0x120 [ 30.783302] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.783975] ? mtree_range_walk+0x632/0x900 [ 30.784567] ? mas_walk+0x5c7/0x7c0 [ 30.785087] do_vmi_munmap+0x1f1/0x2b0 [ 30.785627] mmap_region+0x1f9/0x2660 [ 30.786182] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.786746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.787507] ? __pfx_lock_acquire+0x10/0x10 [ 30.788079] ? __pfx_mmap_region+0x10/0x10 [ 30.788647] ? security_mmap_addr+0x7d/0xa0 [ 30.789237] ? get_unmapped_area+0x1f5/0x3f0 [ 30.789831] do_mmap+0x854/0xf00 [ 30.790309] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.790857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.791472] ksys_mmap_pgoff+0x3af/0x500 [ 30.792026] do_syscall_64+0x3f/0x90 [ 30.792564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793296] RIP: 0033:0x7fa534fc9d82 [ 30.793809] 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 [ 30.796152] RSP: 002b:00007ffea8e57ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.797145] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa534fc9d82 [ 30.798080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa534403000 [ 30.799009] RBP: 00007fa534403000 R08: 0000000000000009 R09: 0000000000001000 [ 30.799940] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644ad41aec0 [ 30.800889] R13: 00007ffea8e58010 R14: 00007ffea8e58040 R15: 00007ffea8e583a0 [ 30.801823] [ 30.802147] [ 30.802386] Allocated by task 214: [ 30.802857] kasan_save_stack+0x22/0x50 [ 30.803426] kasan_set_track+0x25/0x30 [ 30.803964] __kasan_slab_alloc+0x59/0x70 [ 30.804534] kmem_cache_alloc+0x16b/0x370 [ 30.805106] vm_area_dup+0x20/0x160 [ 30.805612] __split_vma+0x170/0x950 [ 30.806137] split_vma+0xc6/0x110 [ 30.806639] mprotect_fixup+0x8d2/0xb30 [ 30.807182] do_mprotect_pkey+0x87e/0xd40 [ 30.807754] __x64_sys_mprotect+0x78/0xc0 [ 30.808307] do_syscall_64+0x3f/0x90 [ 30.808818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809525] [ 30.809754] Freed by task 214: [ 30.810176] kasan_save_stack+0x22/0x50 [ 30.810725] kasan_set_track+0x25/0x30 [ 30.811255] kasan_save_free_info+0x2b/0x50 [ 30.811828] __kasan_slab_free+0x10a/0x190 [ 30.812416] kmem_cache_free+0x10d/0x4d0 [ 30.812973] rcu_core+0x8c8/0x2860 [ 30.813455] __do_softirq+0x1b7/0x7d4 [ 30.813969] [ 30.814209] Last potentially related work creation: [ 30.814866] kasan_save_stack+0x22/0x50 [ 30.815430] __kasan_record_aux_stack+0x8e/0xa0 [ 30.816080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.816770] remove_vma+0x139/0x170 [ 30.817271] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817895] do_vmi_munmap+0x1f1/0x2b0 [ 30.818434] __vm_munmap+0x138/0x3a0 [ 30.818955] __x64_sys_munmap+0x59/0x80 [ 30.819510] do_syscall_64+0x3f/0x90 [ 30.820038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820753] [ 30.821006] The buggy address belongs to the object at ffff88800f16e1d0 [ 30.821006] which belongs to the cache vm_area_struct of size 168 [ 30.822643] The buggy address is located 88 bytes inside of [ 30.822643] freed 168-byte region [ffff88800f16e1d0, ffff88800f16e278) [ 30.824188] [ 30.824420] The buggy address belongs to the physical page: [ 30.825156] page:00000000148b3441 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf16e [ 30.826360] memcg:ffff88801add6b01 [ 30.826832] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.827542] page_type: 0xffffffff() [ 30.828036] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.829067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801add6b01 [ 30.830071] page dumped because: kasan: bad access detected [ 30.830811] [ 30.831048] Memory state around the buggy address: [ 30.831702] ffff88800f16e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.832622] ffff88800f16e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.833571] >ffff88800f16e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.834490] ^ [ 30.835090] ffff88800f16e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.836012] ffff88800f16e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.836938] ================================================================== [ 30.838050] Disabling lock debugging due to kernel taint [ 32.916810] BUG: Bad rss-counter state mm:00000000c85a6510 type:MM_FILEPAGES val:33 [ 32.917751] BUG: Bad rss-counter state mm:00000000c85a6510 type:MM_ANONPAGES val:22 [ 33.460527] BUG: Bad rss-counter state mm:0000000038745848 type:MM_FILEPAGES val:33 [ 33.461555] BUG: Bad rss-counter state mm:0000000038745848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25125' (ECDSA) to the list of known hosts. 2023/06/19 16:18:26 fuzzer started 2023/06/19 16:18:26 dialing manager at localhost:44161 2023/06/19 16:18:27 checking machine... 2023/06/19 16:18:27 checking revisions... [ 34.097896] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:18:27 testing simple program... [ 34.155379] cgroup: Unknown subsys name 'net' [ 34.232555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:18:26 Registers: info registers vcpu 0 RAX=ffffed100d9c13b1 RBX=1ffff1100d9c13b1 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b520 RBP=0000000000000000 RSP=ffff88806ce09d78 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b520 R15=0000000000000000 RIP=ffffffff812d8e6f RFL=00000286 [--S--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 00007f0a70bcb900 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=00007ffc62d77000 CR3=0000000016bb8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007f5d93123eb0 CR3=000000000ec88000 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=73d54452c8b601a1514a7fa63e58c219 XMM02=ec2efd57dc4c00df000000000011d0d0 XMM03=70b9c8b6e5fcf410000000000011d1a0 XMM04=8ad32d86f0fb090600000000000ae988 XMM05=59d5b690e0af863b00000000001341a0 XMM06=00c3ffa147b8d8570000000000134028 XMM07=e042d86d42eb936e0000000000124860 XMM08=70b9c8b6e5fcf410000000000011d1a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000