syzkaller login: [ 34.891563] BUG: Bad rss-counter state mm:00000000852f14b9 type:MM_FILEPAGES val:33 [ 34.892857] BUG: Bad rss-counter state mm:00000000852f14b9 type:MM_ANONPAGES val:22 [ 35.011623] ================================================================== [ 35.012767] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.013718] Read of size 8 at addr ffff88800e27e3f8 by task sshd/218 [ 35.014524] [ 35.014746] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.015627] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.016648] Call Trace: [ 35.016979] [ 35.017268] dump_stack_lvl+0x91/0xf0 [ 35.017759] print_report+0xcc/0x620 [ 35.018252] ? __virt_addr_valid+0x102/0x340 [ 35.018805] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.019451] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.020107] kasan_report+0xbe/0xf0 [ 35.020591] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.021228] vma_interval_tree_remove+0xc75/0xec0 [ 35.021854] vma_prepare+0xc54/0x11a0 [ 35.022346] __split_vma+0x5af/0x950 [ 35.022829] ? __pfx___split_vma+0x10/0x10 [ 35.023379] ? find_held_lock+0x2c/0x110 [ 35.023926] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.024522] ? lock_is_held_type+0x9f/0x120 [ 35.025076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.025687] ? mtree_range_walk+0x632/0x900 [ 35.026253] ? mas_walk+0x5c7/0x7c0 [ 35.026729] do_vmi_munmap+0x1f1/0x2b0 [ 35.027262] mmap_region+0x1f9/0x2660 [ 35.027754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.028298] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.029029] ? __pfx_lock_acquire+0x10/0x10 [ 35.029569] ? __pfx_mmap_region+0x10/0x10 [ 35.030113] ? security_mmap_addr+0x7d/0xa0 [ 35.030646] ? get_unmapped_area+0x1f5/0x3f0 [ 35.031215] do_mmap+0x854/0xf00 [ 35.031661] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.032190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.032756] ksys_mmap_pgoff+0x3af/0x500 [ 35.033274] do_syscall_64+0x3f/0x90 [ 35.033758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.034421] RIP: 0033:0x7f83a3dabd82 [ 35.034903] 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 [ 35.037099] RSP: 002b:00007ffc10c11418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.038027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83a3dabd82 [ 35.038943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83a31e5000 [ 35.039860] RBP: 00007f83a31e5000 R08: 0000000000000009 R09: 0000000000001000 [ 35.040767] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d7881ab20 [ 35.041683] R13: 00007ffc10c11430 R14: 00007ffc10c11460 R15: 00007ffc10c117c0 [ 35.042612] [ 35.042944] [ 35.043169] Allocated by task 211: [ 35.043620] kasan_save_stack+0x22/0x50 [ 35.044181] kasan_set_track+0x25/0x30 [ 35.044708] __kasan_slab_alloc+0x59/0x70 [ 35.045282] kmem_cache_alloc+0x16b/0x370 [ 35.045837] vm_area_dup+0x20/0x160 [ 35.046328] __split_vma+0x170/0x950 [ 35.046825] split_vma+0xc6/0x110 [ 35.047313] mprotect_fixup+0x8d2/0xb30 [ 35.047851] do_mprotect_pkey+0x87e/0xd40 [ 35.048428] __x64_sys_mprotect+0x78/0xc0 [ 35.048991] do_syscall_64+0x3f/0x90 [ 35.049497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.050186] [ 35.050411] Freed by task 209: [ 35.050834] kasan_save_stack+0x22/0x50 [ 35.051390] kasan_set_track+0x25/0x30 [ 35.051923] kasan_save_free_info+0x2b/0x50 [ 35.052490] __kasan_slab_free+0x10a/0x190 [ 35.053065] kmem_cache_free+0x10d/0x4d0 [ 35.053673] rcu_core+0x8c8/0x2860 [ 35.054166] __do_softirq+0x1b7/0x7d4 [ 35.054670] [ 35.054919] Last potentially related work creation: [ 35.055539] kasan_save_stack+0x22/0x50 [ 35.056093] __kasan_record_aux_stack+0x8e/0xa0 [ 35.056703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.057396] remove_vma+0x139/0x170 [ 35.057889] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.058475] do_vmi_munmap+0x1f1/0x2b0 [ 35.059056] __vm_munmap+0x138/0x3a0 [ 35.059695] __x64_sys_munmap+0x59/0x80 [ 35.060388] do_syscall_64+0x3f/0x90 [ 35.061027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.061841] [ 35.062078] Second to last potentially related work creation: [ 35.062801] kasan_save_stack+0x22/0x50 [ 35.063356] __kasan_record_aux_stack+0x8e/0xa0 [ 35.063980] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.064691] remove_vma+0x139/0x170 [ 35.065182] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.065769] do_vmi_munmap+0x1f1/0x2b0 [ 35.066302] mmap_region+0x1f9/0x2660 [ 35.066808] do_mmap+0x854/0xf00 [ 35.067276] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.067795] ksys_mmap_pgoff+0x3af/0x500 [ 35.068359] do_syscall_64+0x3f/0x90 [ 35.068874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.069553] [ 35.069779] The buggy address belongs to the object at ffff88800e27e3a0 [ 35.069779] which belongs to the cache vm_area_struct of size 168 [ 35.071371] The buggy address is located 88 bytes inside of [ 35.071371] freed 168-byte region [ffff88800e27e3a0, ffff88800e27e448) [ 35.072901] [ 35.073130] The buggy address belongs to the physical page: [ 35.073840] page:00000000c8bd4fc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe27e [ 35.075043] memcg:ffff88800dc95a01 [ 35.075493] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.076309] page_type: 0xffffffff() [ 35.076918] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.077945] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc95a01 [ 35.078927] page dumped because: kasan: bad access detected [ 35.079633] [ 35.079873] Memory state around the buggy address: [ 35.080504] ffff88800e27e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.081420] ffff88800e27e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.082343] >ffff88800e27e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.083272] ^ [ 35.084203] ffff88800e27e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.085122] ffff88800e27e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.086035] ================================================================== [ 35.087047] Disabling lock debugging due to kernel taint [ 37.064409] BUG: Bad rss-counter state mm:00000000fc251fcd type:MM_FILEPAGES val:33 [ 37.065395] BUG: Bad rss-counter state mm:00000000fc251fcd type:MM_ANONPAGES val:22 [ 37.578869] BUG: Bad rss-counter state mm:0000000029481fe5 type:MM_FILEPAGES val:33 [ 37.580033] BUG: Bad rss-counter state mm:0000000029481fe5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9822' (ECDSA) to the list of known hosts. 2023/06/19 12:51:58 fuzzer started 2023/06/19 12:51:58 dialing manager at localhost:44161 2023/06/19 12:51:58 checking machine... 2023/06/19 12:51:58 checking revisions... [ 38.275803] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:51:59 testing simple program... [ 38.319353] cgroup: Unknown subsys name 'net' [ 38.379180] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:51:54 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=00007f9626e30100 RCX=0000000000000100 RDX=ffff88801451d1c0 RSI=ffffffff813a0ad6 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88801451d1c0 R15=ffff8880168757e8 RIP=ffffffff814c0800 RFL=00000206 [-----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 00007f9626566900 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=00007f6e6b757650 CR3=000000000c9de000 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=8c062e2acc433ca2214152dee664f120 XMM02=0000000000122600eff9b2d0a8fce9cb XMM03=00000000001226d02c67c8bc2e329bc3 XMM04=f44141e27644225800000000000ae988 XMM05=7dc57d6f0d464ed600000000001370c0 XMM06=dc845823e49815790000000000135af0 XMM07=fb795ef6d65770560000000000124ca8 XMM08=2c67c8bc2e329bc30000000000122670 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800fcafbd0 RSI=ffff88800fcafbb8 RDI=ffff88800fcaf7f8 RBP=ffff88800fcaf880 RSP=ffff88800fcaf7e8 R8 =0000000000000001 R9 =ffff88800fcaf828 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800fcaf8b0 R13=0000000000000000 R14=ffff88800d6d8000 R15=0000000000092cc0 RIP=ffffffff810bd057 RFL=00000292 [--S-A--] 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 00007f6e6b1a2900 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=00007f6e6b75a0b0 CR3=000000000df60000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000