syzkaller login: [ 33.411104] BUG: Bad rss-counter state mm:00000000737c205f type:MM_FILEPAGES val:33 [ 33.411745] BUG: Bad rss-counter state mm:00000000737c205f type:MM_ANONPAGES val:22 [ 33.437644] ================================================================== [ 33.438349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.439074] Read of size 8 at addr ffff88800dd46310 by task sshd/220 [ 33.439663] [ 33.439829] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.440497] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.441253] Call Trace: [ 33.441498] [ 33.441778] dump_stack_lvl+0x91/0xf0 [ 33.442164] print_report+0xcc/0x620 [ 33.442543] ? __virt_addr_valid+0x102/0x340 [ 33.442968] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.443448] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.443942] kasan_report+0xbe/0xf0 [ 33.444313] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.444788] vma_interval_tree_remove+0xc75/0xec0 [ 33.445251] vma_prepare+0xc54/0x11a0 [ 33.445614] __split_vma+0x5af/0x950 [ 33.445984] ? __pfx___split_vma+0x10/0x10 [ 33.446400] ? find_held_lock+0x2c/0x110 [ 33.446804] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.447238] ? lock_is_held_type+0x9f/0x120 [ 33.447660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.448128] ? mtree_range_walk+0x632/0x900 [ 33.448560] ? mas_walk+0x5c7/0x7c0 [ 33.448923] do_vmi_munmap+0x1f1/0x2b0 [ 33.449310] mmap_region+0x1f9/0x2660 [ 33.449681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.450085] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.450659] ? __pfx_lock_acquire+0x10/0x10 [ 33.451076] ? __pfx_mmap_region+0x10/0x10 [ 33.451493] ? security_mmap_addr+0x7d/0xa0 [ 33.451906] ? get_unmapped_area+0x1f5/0x3f0 [ 33.452358] do_mmap+0x854/0xf00 [ 33.452698] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.453080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.453518] ksys_mmap_pgoff+0x3af/0x500 [ 33.453910] do_syscall_64+0x3f/0x90 [ 33.454293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.454796] RIP: 0033:0x7fde1bbc6d82 [ 33.455148] 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 [ 33.456806] RSP: 002b:00007ffef47dddc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.457507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde1bbc6d82 [ 33.458194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde1b000000 [ 33.458867] RBP: 00007fde1b000000 R08: 0000000000000009 R09: 0000000000001000 [ 33.459525] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f796424980 [ 33.460189] R13: 00007ffef47ddde0 R14: 00007ffef47dde10 R15: 00007ffef47de170 [ 33.460857] [ 33.461081] [ 33.461249] Allocated by task 212: [ 33.461580] kasan_save_stack+0x22/0x50 [ 33.461971] kasan_set_track+0x25/0x30 [ 33.462376] __kasan_slab_alloc+0x59/0x70 [ 33.462785] kmem_cache_alloc+0x16b/0x370 [ 33.463185] vm_area_dup+0x20/0x160 [ 33.463536] __split_vma+0x170/0x950 [ 33.463902] split_vma+0xc6/0x110 [ 33.464241] mprotect_fixup+0x8d2/0xb30 [ 33.464626] do_mprotect_pkey+0x87e/0xd40 [ 33.465027] __x64_sys_mprotect+0x78/0xc0 [ 33.465430] do_syscall_64+0x3f/0x90 [ 33.465801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.466315] [ 33.466485] Freed by task 212: [ 33.466792] kasan_save_stack+0x22/0x50 [ 33.467179] kasan_set_track+0x25/0x30 [ 33.467560] kasan_save_free_info+0x2b/0x50 [ 33.467973] __kasan_slab_free+0x10a/0x190 [ 33.468384] kmem_cache_free+0x10d/0x4d0 [ 33.468778] rcu_core+0x8c8/0x2860 [ 33.469122] __do_softirq+0x1b7/0x7d4 [ 33.469491] [ 33.469657] Last potentially related work creation: [ 33.470110] kasan_save_stack+0x22/0x50 [ 33.470518] __kasan_record_aux_stack+0x8e/0xa0 [ 33.470961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.471459] remove_vma+0x139/0x170 [ 33.471810] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.472243] do_vmi_munmap+0x1f1/0x2b0 [ 33.472619] __vm_munmap+0x138/0x3a0 [ 33.472981] __x64_sys_munmap+0x59/0x80 [ 33.473371] do_syscall_64+0x3f/0x90 [ 33.473734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.474260] [ 33.474428] Second to last potentially related work creation: [ 33.474965] kasan_save_stack+0x22/0x50 [ 33.475357] __kasan_record_aux_stack+0x8e/0xa0 [ 33.475802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.476306] remove_vma+0x139/0x170 [ 33.476662] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.477135] do_vmi_munmap+0x1f1/0x2b0 [ 33.477564] mmap_region+0x1f9/0x2660 [ 33.477931] do_mmap+0x854/0xf00 [ 33.478270] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.478648] ksys_mmap_pgoff+0x3af/0x500 [ 33.479032] do_syscall_64+0x3f/0x90 [ 33.479399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.479892] [ 33.480057] The buggy address belongs to the object at ffff88800dd462b8 [ 33.480057] which belongs to the cache vm_area_struct of size 168 [ 33.481193] The buggy address is located 88 bytes inside of [ 33.481193] freed 168-byte region [ffff88800dd462b8, ffff88800dd46360) [ 33.482309] [ 33.482479] The buggy address belongs to the physical page: [ 33.482980] page:0000000050349627 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd46 [ 33.483819] memcg:ffff88800e0f0701 [ 33.484146] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.484641] page_type: 0xffffffff() [ 33.484990] raw: 0100000000000200 ffff88800879fc80 ffffea0000378bc0 dead000000000008 [ 33.485689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0f0701 [ 33.486408] page dumped because: kasan: bad access detected [ 33.486915] [ 33.487084] Memory state around the buggy address: [ 33.487532] ffff88800dd46200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.488186] ffff88800dd46280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.488843] >ffff88800dd46300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.489504] ^ [ 33.489860] ffff88800dd46380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.490527] ffff88800dd46400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.491179] ================================================================== [ 33.492014] Disabling lock debugging due to kernel taint [ 36.312515] BUG: Bad rss-counter state mm:000000007cca908b type:MM_FILEPAGES val:33 [ 36.313994] BUG: Bad rss-counter state mm:000000007cca908b type:MM_ANONPAGES val:22 [ 36.856402] BUG: Bad rss-counter state mm:000000009b357321 type:MM_FILEPAGES val:33 [ 36.857609] BUG: Bad rss-counter state mm:000000009b357321 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23692' (ECDSA) to the list of known hosts. 2023/06/19 16:50:49 fuzzer started 2023/06/19 16:50:49 dialing manager at localhost:44161 2023/06/19 16:50:49 checking machine... 2023/06/19 16:50:49 checking revisions... [ 37.473628] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:50:49 testing simple program... [ 37.527850] cgroup: Unknown subsys name 'net' [ 37.572540] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:50:44 Registers: info registers vcpu 0 RAX=ffffffff83c18b34 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016c0fd01 RSI=ffff888016c0fde8 RDI=ffff888016c0fde8 RBP=ffff888016c0f860 RSP=ffff888016c0f798 R8 =ffffffff86411898 R9 =ffff888016c0f848 R10=0000000000038001 R11=000000000009a8c3 R12=ffff888016c0f868 R13=ffff888016c0f850 R14=ffff888016c0fdf0 R15=ffff888016c0f808 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f0a01767900 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=00007f0a01d1c650 CR3=000000000eba8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 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=ffff888008c58400 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=00007ffe4032b568 CR3=0000000005482000 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=00007f986e1bf5100000556ec5ba8790 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