syzkaller login: [ 30.824407] BUG: Bad rss-counter state mm:00000000fbbadf60 type:MM_FILEPAGES val:33 [ 30.825689] BUG: Bad rss-counter state mm:00000000fbbadf60 type:MM_ANONPAGES val:22 [ 30.867461] ================================================================== [ 30.868466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.869607] Read of size 8 at addr ffff888019e72058 by task sshd/220 [ 30.870473] [ 30.870708] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.871700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.872801] Call Trace: [ 30.873154] [ 30.873467] dump_stack_lvl+0x91/0xf0 [ 30.874028] print_report+0xcc/0x620 [ 30.874575] ? __virt_addr_valid+0x102/0x340 [ 30.875216] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875915] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876593] kasan_report+0xbe/0xf0 [ 30.877151] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.877868] vma_interval_tree_remove+0xc75/0xec0 [ 30.878562] vma_prepare+0xc54/0x11a0 [ 30.879123] __split_vma+0x5af/0x950 [ 30.879644] ? __pfx___split_vma+0x10/0x10 [ 30.880257] ? find_held_lock+0x2c/0x110 [ 30.880875] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.881579] ? lock_is_held_type+0x9f/0x120 [ 30.882198] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.882956] ? mtree_range_walk+0x632/0x900 [ 30.883749] ? mas_walk+0x5c7/0x7c0 [ 30.884310] do_vmi_munmap+0x1f1/0x2b0 [ 30.884906] mmap_region+0x1f9/0x2660 [ 30.885463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.886081] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.886938] ? __pfx_lock_acquire+0x10/0x10 [ 30.887558] ? __pfx_mmap_region+0x10/0x10 [ 30.888183] ? security_mmap_addr+0x7d/0xa0 [ 30.888827] ? get_unmapped_area+0x1f5/0x3f0 [ 30.889460] do_mmap+0x854/0xf00 [ 30.889993] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.890587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.891256] ksys_mmap_pgoff+0x3af/0x500 [ 30.891867] do_syscall_64+0x3f/0x90 [ 30.892416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893191] RIP: 0033:0x7f46db05ad82 [ 30.893726] 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 [ 30.896262] RSP: 002b:00007ffdf2d25468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.897336] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46db05ad82 [ 30.898374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46da494000 [ 30.899365] RBP: 00007f46da494000 R08: 0000000000000009 R09: 0000000000001000 [ 30.900358] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562564999ec0 [ 30.901356] R13: 00007ffdf2d25480 R14: 00007ffdf2d254b0 R15: 00007ffdf2d25810 [ 30.902403] [ 30.902754] [ 30.903004] Allocated by task 213: [ 30.903497] kasan_save_stack+0x22/0x50 [ 30.904065] kasan_set_track+0x25/0x30 [ 30.904605] __kasan_slab_alloc+0x59/0x70 [ 30.905198] kmem_cache_alloc+0x16b/0x370 [ 30.905791] vm_area_dup+0x20/0x160 [ 30.906299] __split_vma+0x170/0x950 [ 30.906840] split_vma+0xc6/0x110 [ 30.907324] mprotect_fixup+0x8d2/0xb30 [ 30.907890] do_mprotect_pkey+0x87e/0xd40 [ 30.908468] __x64_sys_mprotect+0x78/0xc0 [ 30.909062] do_syscall_64+0x3f/0x90 [ 30.909589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910347] [ 30.910589] Freed by task 213: [ 30.911037] kasan_save_stack+0x22/0x50 [ 30.911596] kasan_set_track+0x25/0x30 [ 30.912158] kasan_save_free_info+0x2b/0x50 [ 30.912761] __kasan_slab_free+0x10a/0x190 [ 30.913352] kmem_cache_free+0x10d/0x4d0 [ 30.913949] rcu_core+0x8c8/0x2860 [ 30.914448] __do_softirq+0x1b7/0x7d4 [ 30.914993] [ 30.915232] Last potentially related work creation: [ 30.915901] kasan_save_stack+0x22/0x50 [ 30.916459] __kasan_record_aux_stack+0x8e/0xa0 [ 30.917111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.917866] remove_vma+0x139/0x170 [ 30.918387] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.919015] do_vmi_munmap+0x1f1/0x2b0 [ 30.919574] __vm_munmap+0x138/0x3a0 [ 30.920130] __x64_sys_munmap+0x59/0x80 [ 30.920707] do_syscall_64+0x3f/0x90 [ 30.921274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.922050] [ 30.922304] The buggy address belongs to the object at ffff888019e72000 [ 30.922304] which belongs to the cache vm_area_struct of size 168 [ 30.924054] The buggy address is located 88 bytes inside of [ 30.924054] freed 168-byte region [ffff888019e72000, ffff888019e720a8) [ 30.925709] [ 30.925980] The buggy address belongs to the physical page: [ 30.926780] page:000000001cf79d1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e72 [ 30.928073] memcg:ffff88801806c801 [ 30.928566] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.929327] page_type: 0xffffffff() [ 30.929890] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.930988] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801806c801 [ 30.932039] page dumped because: kasan: bad access detected [ 30.932818] [ 30.933068] Memory state around the buggy address: [ 30.933751] ffff888019e71f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.934776] ffff888019e71f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.935794] >ffff888019e72000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.936797] ^ [ 30.937644] ffff888019e72080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.938673] ffff888019e72100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.939678] ================================================================== [ 30.940933] Disabling lock debugging due to kernel taint [ 33.345596] BUG: Bad rss-counter state mm:00000000592a8748 type:MM_FILEPAGES val:33 [ 33.346907] BUG: Bad rss-counter state mm:00000000592a8748 type:MM_ANONPAGES val:22 [ 33.798857] BUG: Bad rss-counter state mm:000000004202140b type:MM_FILEPAGES val:33 [ 33.800029] BUG: Bad rss-counter state mm:000000004202140b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27021' (ECDSA) to the list of known hosts. 2023/06/20 23:42:52 fuzzer started 2023/06/20 23:42:53 dialing manager at localhost:36067 2023/06/20 23:42:53 checking machine... 2023/06/20 23:42:53 checking revisions... [ 34.436852] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:42:53 testing simple program... [ 34.485324] cgroup: Unknown subsys name 'net' [ 34.533050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:42:52 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff888010034000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81b2a5ef RDI=ffff888019b46fac RBP=ffff888019b46fa8 RSP=ffff888016f27740 R8 =0000000000000001 R9 =ffffed1003368da9 R10=ffff888019b46d4f R11=00000000000b6a61 R12=ffff8880163dcd00 R13=ffffffff854ee9e0 R14=ffff888019b46d48 R15=ffff888016f278d0 RIP=ffffffff81b2a6b0 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 00007f979bfff700 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=00007fdf739530b0 CR3=000000000c9b6000 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=2032353a32343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a32343a3332203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007fa649599fb0 CR3=000000000db1a000 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=bef77e2ed9aee297b942813eec2e5f44 XMM02=2c67c8bc2e329bc3000000000011b410 XMM03=fb795ef6d657705600000000001221f0 XMM04=80cb9a879e182e0200000000000ae988 XMM05=19e9129bd510f2350000000000132068 XMM06=8503a072be77e53d0000000000130ed0 XMM07=e042d86d42eb936e0000000000122470 XMM08=3a6e791b5d1607e8000000000011b470 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000