syzkaller login: [ 38.726004] BUG: Bad rss-counter state mm:00000000537e1e66 type:MM_FILEPAGES val:33 [ 38.728126] BUG: Bad rss-counter state mm:00000000537e1e66 type:MM_ANONPAGES val:22 [ 38.895129] ================================================================== [ 38.896047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.896994] Read of size 8 at addr ffff8880167be140 by task sshd/221 [ 38.897881] [ 38.898115] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.898982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.899959] Call Trace: [ 38.900281] [ 38.900569] dump_stack_lvl+0x91/0xf0 [ 38.901066] print_report+0xcc/0x620 [ 38.901546] ? __virt_addr_valid+0x102/0x340 [ 38.902118] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902728] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903336] kasan_report+0xbe/0xf0 [ 38.903805] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904427] vma_interval_tree_remove+0xc75/0xec0 [ 38.905029] vma_prepare+0xc54/0x11a0 [ 38.905508] __split_vma+0x5af/0x950 [ 38.905986] ? __pfx___split_vma+0x10/0x10 [ 38.906515] ? find_held_lock+0x2c/0x110 [ 38.907040] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.907600] ? lock_is_held_type+0x9f/0x120 [ 38.908140] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.908741] ? mtree_range_walk+0x632/0x900 [ 38.909294] ? mas_walk+0x5c7/0x7c0 [ 38.909772] do_vmi_munmap+0x1f1/0x2b0 [ 38.910277] mmap_region+0x1f9/0x2660 [ 38.910757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.911267] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.911980] ? __pfx_lock_acquire+0x10/0x10 [ 38.912512] ? __pfx_mmap_region+0x10/0x10 [ 38.913038] ? security_mmap_addr+0x7d/0xa0 [ 38.913565] ? get_unmapped_area+0x1f5/0x3f0 [ 38.914125] do_mmap+0x854/0xf00 [ 38.914561] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.915054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.915619] ksys_mmap_pgoff+0x3af/0x500 [ 38.916124] do_syscall_64+0x3f/0x90 [ 38.916604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917251] RIP: 0033:0x7f4f3ce82d82 [ 38.917709] 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 [ 38.919840] RSP: 002b:00007ffceafd2968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.920747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f3ce82d82 [ 38.921587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f3c2bc000 [ 38.922446] RBP: 00007f4f3c2bc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.923290] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7b6e05ec0 [ 38.924128] R13: 00007ffceafd2980 R14: 00007ffceafd29b0 R15: 00007ffceafd2d10 [ 38.924986] [ 38.925275] [ 38.925489] Allocated by task 214: [ 38.925934] kasan_save_stack+0x22/0x50 [ 38.926433] kasan_set_track+0x25/0x30 [ 38.926927] __kasan_slab_alloc+0x59/0x70 [ 38.927451] kmem_cache_alloc+0x16b/0x370 [ 38.927964] vm_area_dup+0x20/0x160 [ 38.928416] __split_vma+0x170/0x950 [ 38.928877] split_vma+0xc6/0x110 [ 38.929312] mprotect_fixup+0x8d2/0xb30 [ 38.929813] do_mprotect_pkey+0x87e/0xd40 [ 38.930369] __x64_sys_mprotect+0x78/0xc0 [ 38.930916] do_syscall_64+0x3f/0x90 [ 38.931419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932103] [ 38.932328] Freed by task 214: [ 38.932734] kasan_save_stack+0x22/0x50 [ 38.933263] kasan_set_track+0x25/0x30 [ 38.933789] kasan_save_free_info+0x2b/0x50 [ 38.934369] __kasan_slab_free+0x10a/0x190 [ 38.934929] kmem_cache_free+0x10d/0x4d0 [ 38.935464] rcu_core+0x8c8/0x2860 [ 38.935933] __do_softirq+0x1b7/0x7d4 [ 38.936433] [ 38.936652] Last potentially related work creation: [ 38.937276] kasan_save_stack+0x22/0x50 [ 38.937805] __kasan_record_aux_stack+0x8e/0xa0 [ 38.938421] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.939097] remove_vma+0x139/0x170 [ 38.939573] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.940156] do_vmi_munmap+0x1f1/0x2b0 [ 38.940667] __vm_munmap+0x138/0x3a0 [ 38.941152] __x64_sys_munmap+0x59/0x80 [ 38.941682] do_syscall_64+0x3f/0x90 [ 38.942185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.942872] [ 38.943100] The buggy address belongs to the object at ffff8880167be0e8 [ 38.943100] which belongs to the cache vm_area_struct of size 168 [ 38.944650] The buggy address is located 88 bytes inside of [ 38.944650] freed 168-byte region [ffff8880167be0e8, ffff8880167be190) [ 38.946163] [ 38.946388] The buggy address belongs to the physical page: [ 38.947083] page:00000000d8992bbc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167be [ 38.948258] memcg:ffff888018c36e01 [ 38.948703] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.949387] page_type: 0xffffffff() [ 38.949871] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ed780 dead000000000004 [ 38.950944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c36e01 [ 38.951907] page dumped because: kasan: bad access detected [ 38.952601] [ 38.952822] Memory state around the buggy address: [ 38.953440] ffff8880167be000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.954373] ffff8880167be080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.955273] >ffff8880167be100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.956174] ^ [ 38.956859] ffff8880167be180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.957770] ffff8880167be200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.958669] ================================================================== [ 38.959996] Disabling lock debugging due to kernel taint [ 40.892131] BUG: Bad rss-counter state mm:00000000e44181c6 type:MM_FILEPAGES val:33 [ 40.893141] BUG: Bad rss-counter state mm:00000000e44181c6 type:MM_ANONPAGES val:22 [ 41.457858] BUG: Bad rss-counter state mm:0000000059524b1c type:MM_FILEPAGES val:33 [ 41.458902] BUG: Bad rss-counter state mm:0000000059524b1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42050' (ECDSA) to the list of known hosts. 2023/06/20 11:48:07 fuzzer started 2023/06/20 11:48:07 dialing manager at localhost:36067 2023/06/20 11:48:07 checking machine... 2023/06/20 11:48:07 checking revisions... [ 42.126808] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:48:08 testing simple program... [ 42.182398] cgroup: Unknown subsys name 'net' [ 42.228711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:48:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff861404d6 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888009497af8 RSP=ffff888009497a30 R8 =ffffffff861404da R9 =ffff888009497ae0 R10=0000000000038001 R11=000000000002214d R12=ffff888009497b00 R13=ffff888009497ae8 R14=ffff888009497ae1 R15=ffff888009497aa0 RIP=ffffffff81130ad6 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 00007f9dbf1ca900 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=00007f9dbf7820b0 CR3=000000000e2fe000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=00007f8848130260 CR3=0000000008c64000 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=44887c952af5b794294599a3a289fd46 XMM02=000000000011b370eff9b2d0a8fce9cb XMM03=000000000011b4402c67c8bc2e329bc3 XMM04=1521a3910b175e2800000000000ae988 XMM05=8610cef81f3723000000000000131ec8 XMM06=db20f175d54767f000000000001317e0 XMM07=e042d86d42eb936e0000000000122058 XMM08=7d4e95ee2c4f4d1e000000000011b440 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000