syzkaller login: [ 31.566864] BUG: Bad rss-counter state mm:00000000919330fc type:MM_FILEPAGES val:33 [ 31.568354] BUG: Bad rss-counter state mm:00000000919330fc type:MM_ANONPAGES val:22 [ 31.608215] ================================================================== [ 31.609257] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.610338] Read of size 8 at addr ffff88800e52aa50 by task sshd/219 [ 31.611153] [ 31.611400] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.612334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.613372] Call Trace: [ 31.613709] [ 31.614013] dump_stack_lvl+0x91/0xf0 [ 31.614545] print_report+0xcc/0x620 [ 31.615086] ? __virt_addr_valid+0x102/0x340 [ 31.615707] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616364] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.617049] kasan_report+0xbe/0xf0 [ 31.617594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.618289] vma_interval_tree_remove+0xc75/0xec0 [ 31.618958] vma_prepare+0xc54/0x11a0 [ 31.619495] __split_vma+0x5af/0x950 [ 31.620012] ? __pfx___split_vma+0x10/0x10 [ 31.620597] ? find_held_lock+0x2c/0x110 [ 31.621173] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.621803] ? lock_is_held_type+0x9f/0x120 [ 31.622405] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.623076] ? mtree_range_walk+0x632/0x900 [ 31.623717] ? mas_walk+0x5c7/0x7c0 [ 31.624260] do_vmi_munmap+0x1f1/0x2b0 [ 31.624820] mmap_region+0x1f9/0x2660 [ 31.625367] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.625881] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.626593] ? __pfx_lock_acquire+0x10/0x10 [ 31.627120] ? __pfx_mmap_region+0x10/0x10 [ 31.627673] ? security_mmap_addr+0x7d/0xa0 [ 31.628210] ? get_unmapped_area+0x1f5/0x3f0 [ 31.628751] do_mmap+0x854/0xf00 [ 31.629192] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.629686] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.630251] ksys_mmap_pgoff+0x3af/0x500 [ 31.630758] do_syscall_64+0x3f/0x90 [ 31.631252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.631902] RIP: 0033:0x7f114bfe8d82 [ 31.632360] 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 [ 31.634494] RSP: 002b:00007ffd1622fb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.635413] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f114bfe8d82 [ 31.636388] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f114b422000 [ 31.637362] RBP: 00007f114b422000 R08: 0000000000000009 R09: 0000000000001000 [ 31.638338] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb552d9ec0 [ 31.639323] R13: 00007ffd1622fb60 R14: 00007ffd1622fb90 R15: 00007ffd1622fef0 [ 31.640315] [ 31.640658] [ 31.640904] Allocated by task 212: [ 31.641398] kasan_save_stack+0x22/0x50 [ 31.641975] kasan_set_track+0x25/0x30 [ 31.642547] __kasan_slab_alloc+0x59/0x70 [ 31.643151] kmem_cache_alloc+0x16b/0x370 [ 31.643757] vm_area_dup+0x20/0x160 [ 31.644281] __split_vma+0x170/0x950 [ 31.644801] split_vma+0xc6/0x110 [ 31.645289] mprotect_fixup+0x8d2/0xb30 [ 31.645852] do_mprotect_pkey+0x87e/0xd40 [ 31.646434] __x64_sys_mprotect+0x78/0xc0 [ 31.647010] do_syscall_64+0x3f/0x90 [ 31.647551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.648254] [ 31.648491] Freed by task 19: [ 31.648917] kasan_save_stack+0x22/0x50 [ 31.649478] kasan_set_track+0x25/0x30 [ 31.650021] kasan_save_free_info+0x2b/0x50 [ 31.650606] __kasan_slab_free+0x10a/0x190 [ 31.651211] kmem_cache_free+0x10d/0x4d0 [ 31.651769] rcu_core+0x8c8/0x2860 [ 31.652259] __do_softirq+0x1b7/0x7d4 [ 31.652789] [ 31.653026] Last potentially related work creation: [ 31.653671] kasan_save_stack+0x22/0x50 [ 31.654227] __kasan_record_aux_stack+0x8e/0xa0 [ 31.654861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.655582] remove_vma+0x139/0x170 [ 31.656080] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.656696] do_vmi_munmap+0x1f1/0x2b0 [ 31.657233] __vm_munmap+0x138/0x3a0 [ 31.657751] __x64_sys_munmap+0x59/0x80 [ 31.658301] do_syscall_64+0x3f/0x90 [ 31.658821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.659556] [ 31.659794] Second to last potentially related work creation: [ 31.660557] kasan_save_stack+0x22/0x50 [ 31.661119] __kasan_record_aux_stack+0x8e/0xa0 [ 31.661754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.662463] remove_vma+0x139/0x170 [ 31.662958] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.663580] do_vmi_munmap+0x1f1/0x2b0 [ 31.664116] mmap_region+0x1f9/0x2660 [ 31.664662] do_mmap+0x854/0xf00 [ 31.665156] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.665714] ksys_mmap_pgoff+0x3af/0x500 [ 31.666295] do_syscall_64+0x3f/0x90 [ 31.666835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.667582] [ 31.667829] The buggy address belongs to the object at ffff88800e52a9f8 [ 31.667829] which belongs to the cache vm_area_struct of size 168 [ 31.669532] The buggy address is located 88 bytes inside of [ 31.669532] freed 168-byte region [ffff88800e52a9f8, ffff88800e52aaa0) [ 31.671138] [ 31.671405] The buggy address belongs to the physical page: [ 31.672167] page:0000000061b155ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe52a [ 31.673418] memcg:ffff88800d6bbb01 [ 31.673900] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.674642] page_type: 0xffffffff() [ 31.675174] raw: 0100000000000200 ffff8880087a0c80 ffffea000036c1c0 dead000000000006 [ 31.676247] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6bbb01 [ 31.677282] page dumped because: kasan: bad access detected [ 31.678053] [ 31.678303] Memory state around the buggy address: [ 31.678972] ffff88800e52a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.679981] ffff88800e52a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.680906] >ffff88800e52aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.681753] ^ [ 31.682457] ffff88800e52aa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.683321] ffff88800e52ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.684181] ================================================================== [ 31.685262] Disabling lock debugging due to kernel taint [ 33.549106] BUG: Bad rss-counter state mm:00000000d2808151 type:MM_FILEPAGES val:33 [ 33.549912] BUG: Bad rss-counter state mm:00000000d2808151 type:MM_ANONPAGES val:22 [ 34.128980] BUG: Bad rss-counter state mm:00000000a0818544 type:MM_FILEPAGES val:33 [ 34.130297] BUG: Bad rss-counter state mm:00000000a0818544 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61272' (ECDSA) to the list of known hosts. 2023/06/21 07:46:57 fuzzer started 2023/06/21 07:46:57 dialing manager at localhost:36067 2023/06/21 07:46:57 checking machine... 2023/06/21 07:46:57 checking revisions... [ 34.759597] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:46:57 testing simple program... [ 34.811300] cgroup: Unknown subsys name 'net' [ 34.861340] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:46:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc17b9bfd8 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=00007feec236c510000056039d25c790 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=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001aece6a RSI=ffffffff818a2a65 RDI=ffff88800d767310 RBP=ffff88800d767368 RSP=ffff88800d7672a0 R8 =0000000000000001 R9 =ffff88800d767350 R10=0000000000038001 R11=0000000000023571 R12=ffff88800d767370 R13=ffff88800d767358 R14=ffff88800d767351 R15=ffff88800d767310 RIP=ffffffff811306da RFL=00000216 [----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 00007f791414c900 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=00007fb33992d650 CR3=00000000101c4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=28e9d7856958c55600000000000ae988 XMM05=6eade64b040e7a4e0000000000133868 XMM06=dfcdbad4f1609c3700000000001326c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000