syzkaller login: [ 30.730050] BUG: Bad rss-counter state mm:00000000fe9dd6fc type:MM_FILEPAGES val:33 [ 30.731270] BUG: Bad rss-counter state mm:00000000fe9dd6fc type:MM_ANONPAGES val:22 [ 30.771420] ================================================================== [ 30.772467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.773565] Read of size 8 at addr ffff88800fd206b0 by task sshd/220 [ 30.774478] [ 30.774700] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.775671] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.776823] Call Trace: [ 30.777151] [ 30.777447] dump_stack_lvl+0x91/0xf0 [ 30.777956] print_report+0xcc/0x620 [ 30.778455] ? __virt_addr_valid+0x102/0x340 [ 30.779010] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779628] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.780263] kasan_report+0xbe/0xf0 [ 30.780763] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781394] vma_interval_tree_remove+0xc75/0xec0 [ 30.782008] vma_prepare+0xc54/0x11a0 [ 30.782499] __split_vma+0x5af/0x950 [ 30.782981] ? __pfx___split_vma+0x10/0x10 [ 30.783526] ? find_held_lock+0x2c/0x110 [ 30.784051] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.784625] ? lock_is_held_type+0x9f/0x120 [ 30.785189] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.785803] ? mtree_range_walk+0x632/0x900 [ 30.786368] ? mas_walk+0x5c7/0x7c0 [ 30.786847] do_vmi_munmap+0x1f1/0x2b0 [ 30.787348] mmap_region+0x1f9/0x2660 [ 30.787846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.788367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.789103] ? __pfx_lock_acquire+0x10/0x10 [ 30.789641] ? __pfx_mmap_region+0x10/0x10 [ 30.790173] ? security_mmap_addr+0x7d/0xa0 [ 30.790707] ? get_unmapped_area+0x1f5/0x3f0 [ 30.791268] do_mmap+0x854/0xf00 [ 30.791713] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.792225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.792819] ksys_mmap_pgoff+0x3af/0x500 [ 30.793334] do_syscall_64+0x3f/0x90 [ 30.793825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794476] RIP: 0033:0x7fa37edcfd82 [ 30.794942] 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 [ 30.797089] RSP: 002b:00007ffe181c2888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.798003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa37edcfd82 [ 30.798881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa37e209000 [ 30.799777] RBP: 00007fa37e209000 R08: 0000000000000009 R09: 0000000000001000 [ 30.800638] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d213b5ec0 [ 30.801522] R13: 00007ffe181c28a0 R14: 00007ffe181c28d0 R15: 00007ffe181c2c30 [ 30.802421] [ 30.802714] [ 30.802942] Allocated by task 213: [ 30.803391] kasan_save_stack+0x22/0x50 [ 30.803897] kasan_set_track+0x25/0x30 [ 30.804403] __kasan_slab_alloc+0x59/0x70 [ 30.804940] kmem_cache_alloc+0x16b/0x370 [ 30.805489] vm_area_dup+0x20/0x160 [ 30.805973] __split_vma+0x170/0x950 [ 30.806462] split_vma+0xc6/0x110 [ 30.806933] mprotect_fixup+0x8d2/0xb30 [ 30.807461] do_mprotect_pkey+0x87e/0xd40 [ 30.808010] __x64_sys_mprotect+0x78/0xc0 [ 30.808562] do_syscall_64+0x3f/0x90 [ 30.809088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809767] [ 30.809994] Freed by task 213: [ 30.810404] kasan_save_stack+0x22/0x50 [ 30.810928] kasan_set_track+0x25/0x30 [ 30.811446] kasan_save_free_info+0x2b/0x50 [ 30.812002] __kasan_slab_free+0x10a/0x190 [ 30.812568] kmem_cache_free+0x10d/0x4d0 [ 30.813106] rcu_core+0x8c8/0x2860 [ 30.813581] __do_softirq+0x1b7/0x7d4 [ 30.814088] [ 30.814314] Last potentially related work creation: [ 30.814933] kasan_save_stack+0x22/0x50 [ 30.815528] __kasan_record_aux_stack+0x8e/0xa0 [ 30.816133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.816836] remove_vma+0x139/0x170 [ 30.817310] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817908] do_vmi_munmap+0x1f1/0x2b0 [ 30.818423] __vm_munmap+0x138/0x3a0 [ 30.818921] __x64_sys_munmap+0x59/0x80 [ 30.819444] do_syscall_64+0x3f/0x90 [ 30.819946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820614] [ 30.820839] The buggy address belongs to the object at ffff88800fd20658 [ 30.820839] which belongs to the cache vm_area_struct of size 168 [ 30.822400] The buggy address is located 88 bytes inside of [ 30.822400] freed 168-byte region [ffff88800fd20658, ffff88800fd20700) [ 30.823900] [ 30.824125] The buggy address belongs to the physical page: [ 30.824851] page:00000000edce3fae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd20 [ 30.826008] memcg:ffff88800df8a701 [ 30.826464] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.827159] page_type: 0xffffffff() [ 30.827631] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.828648] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df8a701 [ 30.829637] page dumped because: kasan: bad access detected [ 30.830336] [ 30.830564] Memory state around the buggy address: [ 30.831180] ffff88800fd20580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.832087] ffff88800fd20600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.833007] >ffff88800fd20680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.833906] ^ [ 30.834524] ffff88800fd20700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.835436] ffff88800fd20780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.836340] ================================================================== [ 30.837324] Disabling lock debugging due to kernel taint [ 33.550307] BUG: Bad rss-counter state mm:000000002986135f type:MM_FILEPAGES val:33 [ 33.551332] BUG: Bad rss-counter state mm:000000002986135f type:MM_ANONPAGES val:22 [ 34.016816] BUG: Bad rss-counter state mm:00000000577f4731 type:MM_FILEPAGES val:33 [ 34.018005] BUG: Bad rss-counter state mm:00000000577f4731 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32048' (ECDSA) to the list of known hosts. 2023/06/20 16:22:57 fuzzer started 2023/06/20 16:22:58 dialing manager at localhost:36067 2023/06/20 16:22:58 checking machine... 2023/06/20 16:22:58 checking revisions... [ 34.707235] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:22:58 testing simple program... [ 34.754044] cgroup: Unknown subsys name 'net' [ 34.796574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:22:57 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=00007ffdd24242c8 CR3=000000001476c000 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=2037353a32323a3631203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a303938323320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801805b680 RSI=ffffffff814c8575 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800dc6f970 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88801b420c98 RIP=ffffffff812d8654 RFL=00000293 [--S-A-C] 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 00007f6b5d320900 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=00007f6b5d8d5650 CR3=000000000dea0000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000