syzkaller login: [ 35.474631] BUG: Bad rss-counter state mm:00000000f05bdc87 type:MM_FILEPAGES val:33 [ 35.475721] BUG: Bad rss-counter state mm:00000000f05bdc87 type:MM_ANONPAGES val:22 [ 35.638693] ================================================================== [ 35.639812] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.640926] Read of size 8 at addr ffff88800dff2140 by task sshd/221 [ 35.642026] [ 35.642287] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.643315] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.644429] Call Trace: [ 35.644757] [ 35.645043] dump_stack_lvl+0x91/0xf0 [ 35.645548] print_report+0xcc/0x620 [ 35.646040] ? __virt_addr_valid+0x102/0x340 [ 35.646610] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.647237] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.647881] kasan_report+0xbe/0xf0 [ 35.648367] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.648994] vma_interval_tree_remove+0xc75/0xec0 [ 35.649608] vma_prepare+0xc54/0x11a0 [ 35.650093] __split_vma+0x5af/0x950 [ 35.650573] ? __pfx___split_vma+0x10/0x10 [ 35.651110] ? find_held_lock+0x2c/0x110 [ 35.651643] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.652214] ? lock_is_held_type+0x9f/0x120 [ 35.652753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.653392] ? mtree_range_walk+0x632/0x900 [ 35.653952] ? mas_walk+0x5c7/0x7c0 [ 35.654442] do_vmi_munmap+0x1f1/0x2b0 [ 35.654945] mmap_region+0x1f9/0x2660 [ 35.655434] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.655949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.656661] ? __pfx_lock_acquire+0x10/0x10 [ 35.657222] ? __pfx_mmap_region+0x10/0x10 [ 35.657752] ? security_mmap_addr+0x7d/0xa0 [ 35.658284] ? get_unmapped_area+0x1f5/0x3f0 [ 35.658835] do_mmap+0x854/0xf00 [ 35.659284] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.659787] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.660370] ksys_mmap_pgoff+0x3af/0x500 [ 35.660882] do_syscall_64+0x3f/0x90 [ 35.661376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.662038] RIP: 0033:0x7f98bac9dd82 [ 35.662497] 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 [ 35.664642] RSP: 002b:00007fff21420108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.665587] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f98bac9dd82 [ 35.666441] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f98ba0d7000 [ 35.667301] RBP: 00007f98ba0d7000 R08: 0000000000000009 R09: 0000000000001000 [ 35.668163] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4d63c5ec0 [ 35.669027] R13: 00007fff21420120 R14: 00007fff21420150 R15: 00007fff214204b0 [ 35.669908] [ 35.670203] [ 35.670419] Allocated by task 214: [ 35.670851] kasan_save_stack+0x22/0x50 [ 35.671360] kasan_set_track+0x25/0x30 [ 35.671870] __kasan_slab_alloc+0x59/0x70 [ 35.672402] kmem_cache_alloc+0x16b/0x370 [ 35.672933] vm_area_dup+0x20/0x160 [ 35.673423] __split_vma+0x170/0x950 [ 35.673894] split_vma+0xc6/0x110 [ 35.674335] mprotect_fixup+0x8d2/0xb30 [ 35.674845] do_mprotect_pkey+0x87e/0xd40 [ 35.675366] __x64_sys_mprotect+0x78/0xc0 [ 35.675887] do_syscall_64+0x3f/0x90 [ 35.676362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.677011] [ 35.677238] Freed by task 214: [ 35.677632] kasan_save_stack+0x22/0x50 [ 35.678144] kasan_set_track+0x25/0x30 [ 35.678642] kasan_save_free_info+0x2b/0x50 [ 35.679181] __kasan_slab_free+0x10a/0x190 [ 35.679723] kmem_cache_free+0x10d/0x4d0 [ 35.680231] rcu_core+0x8c8/0x2860 [ 35.680687] __do_softirq+0x1b7/0x7d4 [ 35.681174] [ 35.681394] Last potentially related work creation: [ 35.681974] kasan_save_stack+0x22/0x50 [ 35.682492] __kasan_record_aux_stack+0x8e/0xa0 [ 35.683156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.683801] remove_vma+0x139/0x170 [ 35.684266] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.684824] do_vmi_munmap+0x1f1/0x2b0 [ 35.685335] __vm_munmap+0x138/0x3a0 [ 35.685804] __x64_sys_munmap+0x59/0x80 [ 35.686306] do_syscall_64+0x3f/0x90 [ 35.686784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.687436] [ 35.687654] Second to last potentially related work creation: [ 35.688345] kasan_save_stack+0x22/0x50 [ 35.688863] __kasan_record_aux_stack+0x8e/0xa0 [ 35.689455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.690097] remove_vma+0x139/0x170 [ 35.690555] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.691119] do_vmi_munmap+0x1f1/0x2b0 [ 35.691619] mmap_region+0x1f9/0x2660 [ 35.692101] do_mmap+0x854/0xf00 [ 35.692548] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.693037] ksys_mmap_pgoff+0x3af/0x500 [ 35.693568] do_syscall_64+0x3f/0x90 [ 35.694050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.694699] [ 35.694919] The buggy address belongs to the object at ffff88800dff20e8 [ 35.694919] which belongs to the cache vm_area_struct of size 168 [ 35.696408] The buggy address is located 88 bytes inside of [ 35.696408] freed 168-byte region [ffff88800dff20e8, ffff88800dff2190) [ 35.697827] [ 35.698046] The buggy address belongs to the physical page: [ 35.698702] page:00000000d9647dcd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdff2 [ 35.699792] memcg:ffff888014004901 [ 35.700230] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.700931] page_type: 0xffffffff() [ 35.701408] raw: 0100000000000200 ffff88800879fc80 ffffea0000364780 dead000000000003 [ 35.702342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014004901 [ 35.703250] page dumped because: kasan: bad access detected [ 35.703917] [ 35.704139] Memory state around the buggy address: [ 35.704722] ffff88800dff2000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.705610] ffff88800dff2080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.706483] >ffff88800dff2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.707356] ^ [ 35.707991] ffff88800dff2180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 35.708867] ffff88800dff2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 35.709737] ================================================================== [ 35.710723] Disabling lock debugging due to kernel taint [ 38.208462] BUG: Bad rss-counter state mm:000000005c70df86 type:MM_FILEPAGES val:33 [ 38.209452] BUG: Bad rss-counter state mm:000000005c70df86 type:MM_ANONPAGES val:22 [ 38.672483] BUG: Bad rss-counter state mm:000000008b443062 type:MM_FILEPAGES val:33 [ 38.673496] BUG: Bad rss-counter state mm:000000008b443062 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65362' (ECDSA) to the list of known hosts. 2023/06/19 19:58:31 fuzzer started 2023/06/19 19:58:31 dialing manager at localhost:44161 2023/06/19 19:58:31 checking machine... 2023/06/19 19:58:31 checking revisions... [ 39.421392] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:58:31 testing simple program... [ 39.467553] cgroup: Unknown subsys name 'net' [ 39.509572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:58:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000f0 RCX=0000000000000001 RDX=0000000000092cc0 RSI=ffffffff818470dc RDI=ffff88800844f780 RBP=ffff888017ca7bf8 RSP=ffff888017ca7bb0 R8 =ffff888017ca7bc0 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=ffff88800eaf8ab0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff81807f19 RFL=00000287 [--S--PC] 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 00007f81966f3900 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=00007f8196ca8650 CR3=000000001aa90000 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=dffffc0000000000 RBX=ffff88806cf35000 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f8196be6477 RSP=ffff888017ca7798 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f8196be6000 R11=00000000000b6996 R12=ffff888017ca78b0 R13=0000000000000000 R14=ffff88800f051b40 R15=0000000000092cc0 RIP=ffffffff8135b910 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 00007f81966f3900 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=00007f8196caa618 CR3=000000001aa90000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000