syzkaller login: [ 45.510840] BUG: Bad rss-counter state mm:000000001ca7b359 type:MM_FILEPAGES val:33 [ 45.511515] BUG: Bad rss-counter state mm:000000001ca7b359 type:MM_ANONPAGES val:22 [ 45.693766] ================================================================== [ 45.694368] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.695264] Read of size 8 at addr ffff88800e2c8140 by task sshd/218 [ 45.695748] [ 45.695890] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.696434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.697047] Call Trace: [ 45.697253] [ 45.697437] dump_stack_lvl+0x91/0xf0 [ 45.697757] print_report+0xcc/0x620 [ 45.698073] ? __virt_addr_valid+0x102/0x340 [ 45.698499] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.698891] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.699264] kasan_report+0xbe/0xf0 [ 45.699549] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.699938] vma_interval_tree_remove+0xc75/0xec0 [ 45.700327] vma_prepare+0xc54/0x11a0 [ 45.700639] __split_vma+0x5af/0x950 [ 45.700946] ? __pfx___split_vma+0x10/0x10 [ 45.701290] ? find_held_lock+0x2c/0x110 [ 45.701632] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.701997] ? lock_is_held_type+0x9f/0x120 [ 45.702346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.702779] ? mtree_range_walk+0x632/0x900 [ 45.703120] ? mas_walk+0x5c7/0x7c0 [ 45.703419] do_vmi_munmap+0x1f1/0x2b0 [ 45.703737] mmap_region+0x1f9/0x2660 [ 45.704048] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.704379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.704831] ? __pfx_lock_acquire+0x10/0x10 [ 45.705175] ? __pfx_mmap_region+0x10/0x10 [ 45.705514] ? security_mmap_addr+0x7d/0xa0 [ 45.705859] ? get_unmapped_area+0x1f5/0x3f0 [ 45.706213] do_mmap+0x854/0xf00 [ 45.706537] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.706871] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.707240] ksys_mmap_pgoff+0x3af/0x500 [ 45.707570] do_syscall_64+0x3f/0x90 [ 45.707880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.708302] RIP: 0033:0x7fb947bffd82 [ 45.708599] 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 [ 45.709944] RSP: 002b:00007ffda56baea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.710561] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb947bffd82 [ 45.711093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb947039000 [ 45.711630] RBP: 00007fb947039000 R08: 0000000000000009 R09: 0000000000001000 [ 45.712164] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf06ce5ec0 [ 45.712700] R13: 00007ffda56baec0 R14: 00007ffda56baef0 R15: 00007ffda56bb250 [ 45.713245] [ 45.713435] [ 45.713577] Allocated by task 211: [ 45.713852] kasan_save_stack+0x22/0x50 [ 45.714184] kasan_set_track+0x25/0x30 [ 45.714549] __kasan_slab_alloc+0x59/0x70 [ 45.714890] kmem_cache_alloc+0x16b/0x370 [ 45.715224] vm_area_dup+0x20/0x160 [ 45.715523] __split_vma+0x170/0x950 [ 45.715827] split_vma+0xc6/0x110 [ 45.716115] mprotect_fixup+0x8d2/0xb30 [ 45.716447] do_mprotect_pkey+0x87e/0xd40 [ 45.716786] __x64_sys_mprotect+0x78/0xc0 [ 45.717124] do_syscall_64+0x3f/0x90 [ 45.717433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.717851] [ 45.717996] Freed by task 211: [ 45.718251] kasan_save_stack+0x22/0x50 [ 45.718624] kasan_set_track+0x25/0x30 [ 45.718942] kasan_save_free_info+0x2b/0x50 [ 45.719284] __kasan_slab_free+0x10a/0x190 [ 45.719627] kmem_cache_free+0x10d/0x4d0 [ 45.719955] rcu_core+0x8c8/0x2860 [ 45.720251] __do_softirq+0x1b7/0x7d4 [ 45.720561] [ 45.720702] Last potentially related work creation: [ 45.721077] kasan_save_stack+0x22/0x50 [ 45.721403] __kasan_record_aux_stack+0x8e/0xa0 [ 45.721773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.722189] remove_vma+0x139/0x170 [ 45.722514] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.722883] do_vmi_munmap+0x1f1/0x2b0 [ 45.723205] __vm_munmap+0x138/0x3a0 [ 45.723509] __x64_sys_munmap+0x59/0x80 [ 45.723830] do_syscall_64+0x3f/0x90 [ 45.724140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.724558] [ 45.724702] Second to last potentially related work creation: [ 45.725139] kasan_save_stack+0x22/0x50 [ 45.725469] __kasan_record_aux_stack+0x8e/0xa0 [ 45.725841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.726256] remove_vma+0x139/0x170 [ 45.726597] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.726956] do_vmi_munmap+0x1f1/0x2b0 [ 45.727270] __vm_munmap+0x138/0x3a0 [ 45.727571] __x64_sys_munmap+0x59/0x80 [ 45.727891] do_syscall_64+0x3f/0x90 [ 45.728203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.728614] [ 45.728755] The buggy address belongs to the object at ffff88800e2c80e8 [ 45.728755] which belongs to the cache vm_area_struct of size 168 [ 45.729679] The buggy address is located 88 bytes inside of [ 45.729679] freed 168-byte region [ffff88800e2c80e8, ffff88800e2c8190) [ 45.734607] [ 45.734745] The buggy address belongs to the physical page: [ 45.735172] page:00000000e2781c55 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2c8 [ 45.735858] memcg:ffff88800c6a3001 [ 45.736132] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.736544] page_type: 0xffffffff() [ 45.736835] raw: 0100000000000200 ffff88800879fc80 ffffea0000316dc0 dead000000000008 [ 45.737416] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6a3001 [ 45.737991] page dumped because: kasan: bad access detected [ 45.738435] [ 45.738589] Memory state around the buggy address: [ 45.738961] ffff88800e2c8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.739507] ffff88800e2c8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 45.740053] >ffff88800e2c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.740584] ^ [ 45.740977] ffff88800e2c8180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 45.741483] ffff88800e2c8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 45.742007] ================================================================== [ 45.742907] Disabling lock debugging due to kernel taint [ 50.332975] BUG: Bad rss-counter state mm:00000000c0fce756 type:MM_FILEPAGES val:33 [ 50.333659] BUG: Bad rss-counter state mm:00000000c0fce756 type:MM_ANONPAGES val:22 [ 51.870600] BUG: Bad rss-counter state mm:00000000f0a7483f type:MM_FILEPAGES val:33 [ 51.871223] BUG: Bad rss-counter state mm:00000000f0a7483f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31022' (ECDSA) to the list of known hosts. 2023/06/20 08:03:50 fuzzer started 2023/06/20 08:03:50 dialing manager at localhost:44161 2023/06/20 08:03:50 checking machine... 2023/06/20 08:03:50 checking revisions... 2023/06/20 08:03:50 testing simple program... [ 52.918806] kmemleak: Automatic memory scanning thread ended [ 52.990910] cgroup: Unknown subsys name 'net' [ 53.041959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:03:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85da037c RCX=ffffffff8120674e RDX=0000000000000000 RSI=ffffffff860acb48 RDI=ffffffff85da037c RBP=ffffffff85da0380 RSP=ffff888008d7f878 R8 =ffffffff860acb48 R9 =ffff888008d7f970 R10=0000000000038001 R11=0000000000009bea R12=ffffffff85da037c R13=ffffffff85da037c R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcaf RFL=00000256 [---ZAP-] 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 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=00005601b1353b88 CR3=0000000019ce0000 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=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=000056310c10b340 RBX=0000000000000000 RCX=000056310c937c80 RDX=0000000000000000 RSI=0000000000000000 RDI=000056310c9378c0 RBP=00007f2edf880c90 RSP=00007f2edf880b78 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=00007f2edfc6123f R14=000056310c937c80 R15=0000000000802000 RIP=000056310c10b344 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2edf881700 00000000 00000000 GS =0000 0000000000000000 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=00007f57fcd2d000 CR3=000000000d962000 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=2038343a33303a3830203032206e754a XMM01=5f687373203a726f727265203a5d3533 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a33303a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000