syzkaller login: [ 31.529961] BUG: Bad rss-counter state mm:000000006c30f74f type:MM_FILEPAGES val:33 [ 31.531183] BUG: Bad rss-counter state mm:000000006c30f74f type:MM_ANONPAGES val:22 [ 31.671863] ================================================================== [ 31.673005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.674180] Read of size 8 at addr ffff88800d93c228 by task sshd/220 [ 31.675232] [ 31.675500] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.676572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.677609] Call Trace: [ 31.677939] [ 31.678240] dump_stack_lvl+0x91/0xf0 [ 31.678747] print_report+0xcc/0x620 [ 31.679267] ? __virt_addr_valid+0x102/0x340 [ 31.679833] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.680494] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.681141] kasan_report+0xbe/0xf0 [ 31.681636] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.682279] vma_interval_tree_remove+0xc75/0xec0 [ 31.682894] vma_prepare+0xc54/0x11a0 [ 31.683407] __split_vma+0x5af/0x950 [ 31.683887] ? __pfx___split_vma+0x10/0x10 [ 31.684461] ? find_held_lock+0x2c/0x110 [ 31.684994] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.685579] ? lock_is_held_type+0x9f/0x120 [ 31.686153] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.686767] ? mtree_range_walk+0x632/0x900 [ 31.687352] ? mas_walk+0x5c7/0x7c0 [ 31.687843] do_vmi_munmap+0x1f1/0x2b0 [ 31.688391] mmap_region+0x1f9/0x2660 [ 31.688883] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.689419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.690168] ? __pfx_lock_acquire+0x10/0x10 [ 31.690723] ? __pfx_mmap_region+0x10/0x10 [ 31.691293] ? security_mmap_addr+0x7d/0xa0 [ 31.691844] ? get_unmapped_area+0x1f5/0x3f0 [ 31.692442] do_mmap+0x854/0xf00 [ 31.692887] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.693406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.693974] ksys_mmap_pgoff+0x3af/0x500 [ 31.694517] do_syscall_64+0x3f/0x90 [ 31.695021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695706] RIP: 0033:0x7fd65b382d82 [ 31.696187] 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 [ 31.698419] RSP: 002b:00007fff19503fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.699362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd65b382d82 [ 31.700262] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd65a7bc000 [ 31.701150] RBP: 00007fd65a7bc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.702035] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b52ebf5ec0 [ 31.702915] R13: 00007fff19503fd0 R14: 00007fff19504000 R15: 00007fff19504360 [ 31.703814] [ 31.704140] [ 31.704394] Allocated by task 213: [ 31.704847] kasan_save_stack+0x22/0x50 [ 31.705466] kasan_set_track+0x25/0x30 [ 31.706120] __kasan_slab_alloc+0x59/0x70 [ 31.706680] kmem_cache_alloc+0x16b/0x370 [ 31.707230] vm_area_dup+0x20/0x160 [ 31.707696] __split_vma+0x170/0x950 [ 31.708202] split_vma+0xc6/0x110 [ 31.708677] mprotect_fixup+0x8d2/0xb30 [ 31.709199] do_mprotect_pkey+0x87e/0xd40 [ 31.709735] __x64_sys_mprotect+0x78/0xc0 [ 31.710276] do_syscall_64+0x3f/0x90 [ 31.710774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.711446] [ 31.711668] Freed by task 213: [ 31.712085] kasan_save_stack+0x22/0x50 [ 31.712646] kasan_set_track+0x25/0x30 [ 31.713170] kasan_save_free_info+0x2b/0x50 [ 31.713741] __kasan_slab_free+0x10a/0x190 [ 31.714306] kmem_cache_free+0x10d/0x4d0 [ 31.714848] rcu_core+0x8c8/0x2860 [ 31.715325] __do_softirq+0x1b7/0x7d4 [ 31.715883] [ 31.716130] Last potentially related work creation: [ 31.716754] kasan_save_stack+0x22/0x50 [ 31.717291] __kasan_record_aux_stack+0x8e/0xa0 [ 31.717894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.718560] remove_vma+0x139/0x170 [ 31.719034] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.719639] do_vmi_munmap+0x1f1/0x2b0 [ 31.720161] __vm_munmap+0x138/0x3a0 [ 31.720647] __x64_sys_munmap+0x59/0x80 [ 31.721172] do_syscall_64+0x3f/0x90 [ 31.721666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.722340] [ 31.722560] The buggy address belongs to the object at ffff88800d93c1d0 [ 31.722560] which belongs to the cache vm_area_struct of size 168 [ 31.724115] The buggy address is located 88 bytes inside of [ 31.724115] freed 168-byte region [ffff88800d93c1d0, ffff88800d93c278) [ 31.725600] [ 31.725831] The buggy address belongs to the physical page: [ 31.726523] page:00000000d2c4dd81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd93c [ 31.727652] memcg:ffff8880166fa301 [ 31.728123] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.728821] page_type: 0xffffffff() [ 31.729314] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.730293] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166fa301 [ 31.731248] page dumped because: kasan: bad access detected [ 31.731927] [ 31.732182] Memory state around the buggy address: [ 31.732819] ffff88800d93c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.733733] ffff88800d93c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.734633] >ffff88800d93c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.735531] ^ [ 31.736117] ffff88800d93c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.737015] ffff88800d93c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.737888] ================================================================== [ 31.738860] Disabling lock debugging due to kernel taint [ 34.455960] BUG: Bad rss-counter state mm:00000000d34d8f8f type:MM_FILEPAGES val:33 [ 34.457061] BUG: Bad rss-counter state mm:00000000d34d8f8f type:MM_ANONPAGES val:22 [ 34.890690] BUG: Bad rss-counter state mm:00000000b2fb7c53 type:MM_FILEPAGES val:33 [ 34.891834] BUG: Bad rss-counter state mm:00000000b2fb7c53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9731' (ECDSA) to the list of known hosts. 2023/06/21 02:02:32 fuzzer started 2023/06/21 02:02:32 dialing manager at localhost:36067 2023/06/21 02:02:32 checking machine... 2023/06/21 02:02:32 checking revisions... [ 35.633042] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:02:32 testing simple program... [ 35.682724] cgroup: Unknown subsys name 'net' [ 35.723741] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:02:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016de7a28 RSI=ffff888016de7a78 RDI=ffff888016de7a30 RBP=0000000000000010 RSP=ffff888016de7920 R8 =0000000000000001 R9 =ffff888016de7a20 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016de7a40 R13=ffff888016de7a28 R14=ffff888016de7a78 R15=ffff888016de79e0 RIP=ffffffff81131c58 RFL=00000246 [---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 00007f6cb9a1d900 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=00007fff15092000 CR3=000000000e9ac000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8b734be380 CR3=00000000094f0000 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=2032333a32303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a32303a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000