syzkaller login: [ 38.396931] BUG: Bad rss-counter state mm:0000000086a94d72 type:MM_FILEPAGES val:33 [ 38.398890] BUG: Bad rss-counter state mm:0000000086a94d72 type:MM_ANONPAGES val:22 [ 38.564236] ================================================================== [ 38.565376] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.566351] Read of size 8 at addr ffff88800e9d5058 by task sshd/220 [ 38.567324] [ 38.567540] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.568405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.569463] Call Trace: [ 38.569791] [ 38.570079] dump_stack_lvl+0x91/0xf0 [ 38.570583] print_report+0xcc/0x620 [ 38.571067] ? __virt_addr_valid+0x102/0x340 [ 38.571638] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.572264] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.572915] kasan_report+0xbe/0xf0 [ 38.573392] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.574014] vma_interval_tree_remove+0xc75/0xec0 [ 38.574622] vma_prepare+0xc54/0x11a0 [ 38.575118] __split_vma+0x5af/0x950 [ 38.575599] ? __pfx___split_vma+0x10/0x10 [ 38.576142] ? find_held_lock+0x2c/0x110 [ 38.576671] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.577252] ? lock_is_held_type+0x9f/0x120 [ 38.577798] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.578413] ? mtree_range_walk+0x632/0x900 [ 38.578969] ? mas_walk+0x5c7/0x7c0 [ 38.579455] do_vmi_munmap+0x1f1/0x2b0 [ 38.579965] mmap_region+0x1f9/0x2660 [ 38.580446] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.580977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.581710] ? __pfx_lock_acquire+0x10/0x10 [ 38.582247] ? __pfx_mmap_region+0x10/0x10 [ 38.582798] ? security_mmap_addr+0x7d/0xa0 [ 38.583328] ? get_unmapped_area+0x1f5/0x3f0 [ 38.583893] do_mmap+0x854/0xf00 [ 38.584341] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.584852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.585430] ksys_mmap_pgoff+0x3af/0x500 [ 38.585949] do_syscall_64+0x3f/0x90 [ 38.586441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.587088] RIP: 0033:0x7fa1a11bbd82 [ 38.587546] 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 [ 38.589696] RSP: 002b:00007ffcfda605a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.590598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1a11bbd82 [ 38.591454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1a05f5000 [ 38.592302] RBP: 00007fa1a05f5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.593172] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b397599ec0 [ 38.594025] R13: 00007ffcfda605c0 R14: 00007ffcfda605f0 R15: 00007ffcfda60950 [ 38.594923] [ 38.595218] [ 38.595436] Allocated by task 213: [ 38.595869] kasan_save_stack+0x22/0x50 [ 38.596381] kasan_set_track+0x25/0x30 [ 38.596887] __kasan_slab_alloc+0x59/0x70 [ 38.597420] kmem_cache_alloc+0x16b/0x370 [ 38.597955] vm_area_dup+0x20/0x160 [ 38.598440] __split_vma+0x170/0x950 [ 38.598913] split_vma+0xc6/0x110 [ 38.599358] mprotect_fixup+0x8d2/0xb30 [ 38.599878] do_mprotect_pkey+0x87e/0xd40 [ 38.600398] __x64_sys_mprotect+0x78/0xc0 [ 38.600934] do_syscall_64+0x3f/0x90 [ 38.601409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.602065] [ 38.602285] Freed by task 213: [ 38.602679] kasan_save_stack+0x22/0x50 [ 38.603183] kasan_set_track+0x25/0x30 [ 38.603684] kasan_save_free_info+0x2b/0x50 [ 38.604225] __kasan_slab_free+0x10a/0x190 [ 38.604760] kmem_cache_free+0x10d/0x4d0 [ 38.605299] rcu_core+0x8c8/0x2860 [ 38.605750] __do_softirq+0x1b7/0x7d4 [ 38.606232] [ 38.606461] Last potentially related work creation: [ 38.607051] kasan_save_stack+0x22/0x50 [ 38.607581] __kasan_record_aux_stack+0x8e/0xa0 [ 38.608230] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.608891] remove_vma+0x139/0x170 [ 38.609338] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.609904] do_vmi_munmap+0x1f1/0x2b0 [ 38.610397] __vm_munmap+0x138/0x3a0 [ 38.610875] __x64_sys_munmap+0x59/0x80 [ 38.611373] do_syscall_64+0x3f/0x90 [ 38.611862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.612517] [ 38.612732] The buggy address belongs to the object at ffff88800e9d5000 [ 38.612732] which belongs to the cache vm_area_struct of size 168 [ 38.614230] The buggy address is located 88 bytes inside of [ 38.614230] freed 168-byte region [ffff88800e9d5000, ffff88800e9d50a8) [ 38.615669] [ 38.615887] The buggy address belongs to the physical page: [ 38.616567] page:00000000f1257aa6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9d5 [ 38.617686] memcg:ffff88800edd1001 [ 38.618130] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.618780] page_type: 0xffffffff() [ 38.619237] raw: 0100000000000200 ffff88800879fc80 ffffea000038dc80 dead000000000008 [ 38.620174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edd1001 [ 38.621106] page dumped because: kasan: bad access detected [ 38.621773] [ 38.621991] Memory state around the buggy address: [ 38.622578] ffff88800e9d4f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.623481] ffff88800e9d4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.624348] >ffff88800e9d5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.625216] ^ [ 38.625941] ffff88800e9d5080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.626802] ffff88800e9d5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.627663] ================================================================== [ 38.628731] Disabling lock debugging due to kernel taint [ 40.885736] BUG: Bad rss-counter state mm:000000006bf9a77c type:MM_FILEPAGES val:33 [ 40.886742] BUG: Bad rss-counter state mm:000000006bf9a77c type:MM_ANONPAGES val:22 [ 41.457981] BUG: Bad rss-counter state mm:000000006ed51418 type:MM_FILEPAGES val:33 [ 41.459175] BUG: Bad rss-counter state mm:000000006ed51418 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7565' (ECDSA) to the list of known hosts. 2023/06/19 19:39:28 fuzzer started 2023/06/19 19:39:28 dialing manager at localhost:44161 2023/06/19 19:39:28 checking machine... 2023/06/19 19:39:28 checking revisions... [ 42.132589] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:39:28 testing simple program... [ 42.177603] cgroup: Unknown subsys name 'net' [ 42.221185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:39:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fffad8e1708 CR3=0000000005482000 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=00007f862400b5100000565059e25790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888017910001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801790ff01 RSI=ffff88801790ff38 RDI=ffff88801790f970 RBP=ffff88801790f9b8 RSP=ffff88801790f8e8 R8 =ffffffff863b1c9a R9 =ffff88801790f9a0 R10=0000000000038001 R11=000000000008a977 R12=ffff88801790f9c0 R13=ffff88801790f9a8 R14=ffff88801790ff40 R15=ffff88801790f960 RIP=ffffffff811304d5 RFL=00000296 [--S-AP-] 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 00007f97850fc900 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=00007f97856b40b0 CR3=0000000009660000 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