syzkaller login: [ 35.440335] BUG: Bad rss-counter state mm:000000004c26781d type:MM_FILEPAGES val:33 [ 35.441563] BUG: Bad rss-counter state mm:000000004c26781d type:MM_ANONPAGES val:22 [ 35.608322] ================================================================== [ 35.609208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.610437] Read of size 8 at addr ffff88800f2d3140 by task sshd/220 [ 35.611588] [ 35.611868] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.613006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.614294] Call Trace: [ 35.614731] [ 35.615101] dump_stack_lvl+0x91/0xf0 [ 35.615573] print_report+0xcc/0x620 [ 35.616072] ? __virt_addr_valid+0x102/0x340 [ 35.616594] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.617191] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.617776] kasan_report+0xbe/0xf0 [ 35.618259] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.618909] vma_interval_tree_remove+0xc75/0xec0 [ 35.619501] vma_prepare+0xc54/0x11a0 [ 35.620005] __split_vma+0x5af/0x950 [ 35.620481] ? __pfx___split_vma+0x10/0x10 [ 35.621043] ? find_held_lock+0x2c/0x110 [ 35.621569] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.622148] ? lock_is_held_type+0x9f/0x120 [ 35.622713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.623338] ? mtree_range_walk+0x632/0x900 [ 35.623908] ? mas_walk+0x5c7/0x7c0 [ 35.624388] do_vmi_munmap+0x1f1/0x2b0 [ 35.624904] mmap_region+0x1f9/0x2660 [ 35.625396] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.625917] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.626629] ? __pfx_lock_acquire+0x10/0x10 [ 35.627202] ? __pfx_mmap_region+0x10/0x10 [ 35.627731] ? security_mmap_addr+0x7d/0xa0 [ 35.628267] ? get_unmapped_area+0x1f5/0x3f0 [ 35.628817] do_mmap+0x854/0xf00 [ 35.629274] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.629765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.630369] ksys_mmap_pgoff+0x3af/0x500 [ 35.630922] do_syscall_64+0x3f/0x90 [ 35.631403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.632062] RIP: 0033:0x7f3ff9a76d82 [ 35.632528] 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 [ 35.634744] RSP: 002b:00007fff6bd98368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.635665] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ff9a76d82 [ 35.636527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ff8eb0000 [ 35.637387] RBP: 00007f3ff8eb0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.638244] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1e0884f70 [ 35.639137] R13: 00007fff6bd98380 R14: 00007fff6bd983b0 R15: 00007fff6bd98710 [ 35.640020] [ 35.640318] [ 35.640532] Allocated by task 213: [ 35.640984] kasan_save_stack+0x22/0x50 [ 35.641496] kasan_set_track+0x25/0x30 [ 35.641998] __kasan_slab_alloc+0x59/0x70 [ 35.642522] kmem_cache_alloc+0x16b/0x370 [ 35.643106] vm_area_dup+0x20/0x160 [ 35.643561] __split_vma+0x170/0x950 [ 35.644070] split_vma+0xc6/0x110 [ 35.644518] mprotect_fixup+0x8d2/0xb30 [ 35.645100] do_mprotect_pkey+0x87e/0xd40 [ 35.645812] __x64_sys_mprotect+0x78/0xc0 [ 35.646351] do_syscall_64+0x3f/0x90 [ 35.646845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.647503] [ 35.647719] Freed by task 213: [ 35.648143] kasan_save_stack+0x22/0x50 [ 35.648656] kasan_set_track+0x25/0x30 [ 35.649173] kasan_save_free_info+0x2b/0x50 [ 35.649699] __kasan_slab_free+0x10a/0x190 [ 35.650253] kmem_cache_free+0x10d/0x4d0 [ 35.650772] rcu_core+0x8c8/0x2860 [ 35.651223] __do_softirq+0x1b7/0x7d4 [ 35.651702] [ 35.651950] Last potentially related work creation: [ 35.652541] kasan_save_stack+0x22/0x50 [ 35.653060] __kasan_record_aux_stack+0x8e/0xa0 [ 35.653641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.654291] remove_vma+0x139/0x170 [ 35.654777] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.655383] do_vmi_munmap+0x1f1/0x2b0 [ 35.655888] __vm_munmap+0x138/0x3a0 [ 35.656357] __x64_sys_munmap+0x59/0x80 [ 35.656881] do_syscall_64+0x3f/0x90 [ 35.657376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.658041] [ 35.658256] The buggy address belongs to the object at ffff88800f2d30e8 [ 35.658256] which belongs to the cache vm_area_struct of size 168 [ 35.659769] The buggy address is located 88 bytes inside of [ 35.659769] freed 168-byte region [ffff88800f2d30e8, ffff88800f2d3190) [ 35.661203] [ 35.661415] The buggy address belongs to the physical page: [ 35.662111] page:000000002d874b64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2d3 [ 35.663249] memcg:ffff888016d12f01 [ 35.663682] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.664336] page_type: 0xffffffff() [ 35.664793] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.665714] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d12f01 [ 35.666657] page dumped because: kasan: bad access detected [ 35.667357] [ 35.667575] Memory state around the buggy address: [ 35.668178] ffff88800f2d3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.669054] ffff88800f2d3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.669924] >ffff88800f2d3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.670804] ^ [ 35.671490] ffff88800f2d3180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.672359] ffff88800f2d3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.673231] ================================================================== [ 35.674346] Disabling lock debugging due to kernel taint [ 37.527231] BUG: Bad rss-counter state mm:0000000035af689a type:MM_FILEPAGES val:33 [ 37.528027] BUG: Bad rss-counter state mm:0000000035af689a type:MM_ANONPAGES val:22 [ 37.919401] BUG: Bad rss-counter state mm:0000000037f0702a type:MM_FILEPAGES val:33 [ 37.920146] BUG: Bad rss-counter state mm:0000000037f0702a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23417' (ECDSA) to the list of known hosts. 2023/06/20 04:32:26 fuzzer started 2023/06/20 04:32:26 dialing manager at localhost:44161 2023/06/20 04:32:26 checking machine... 2023/06/20 04:32:26 checking revisions... [ 38.706515] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:32:26 testing simple program... [ 38.760265] cgroup: Unknown subsys name 'net' [ 38.847728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:32:21 Registers: info registers vcpu 0 RAX=0000000000020d8a RBX=0000000000000002 RCX=ffffffff8180c521 RDX=0000000000020d9b RSI=00000000000080c5 RDI=ffffffff8613756e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137508 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130868 RFL=00000283 [--S---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 00007fe9fdf85900 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=00007ffca49db000 CR3=000000000edd8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f75c882ae90 CR3=000000001018e000 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=2035323a32333a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000