syzkaller login: [ 38.736767] BUG: Bad rss-counter state mm:000000003f981861 type:MM_FILEPAGES val:33 [ 38.737976] BUG: Bad rss-counter state mm:000000003f981861 type:MM_ANONPAGES val:22 [ 38.905121] ================================================================== [ 38.906218] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.907447] Read of size 8 at addr ffff888015ebc228 by task sshd/220 [ 38.908290] [ 38.908530] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.909431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.910476] Call Trace: [ 38.910810] [ 38.911113] dump_stack_lvl+0x91/0xf0 [ 38.911631] print_report+0xcc/0x620 [ 38.912141] ? __virt_addr_valid+0x102/0x340 [ 38.912720] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913365] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914007] kasan_report+0xbe/0xf0 [ 38.914514] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915162] vma_interval_tree_remove+0xc75/0xec0 [ 38.915790] vma_prepare+0xc54/0x11a0 [ 38.916295] __split_vma+0x5af/0x950 [ 38.916803] ? __pfx___split_vma+0x10/0x10 [ 38.917373] ? find_held_lock+0x2c/0x110 [ 38.917925] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.918553] ? lock_is_held_type+0x9f/0x120 [ 38.919127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.919781] ? mtree_range_walk+0x632/0x900 [ 38.920364] ? mas_walk+0x5c7/0x7c0 [ 38.920870] do_vmi_munmap+0x1f1/0x2b0 [ 38.921403] mmap_region+0x1f9/0x2660 [ 38.921945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.922494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.923275] ? __pfx_lock_acquire+0x10/0x10 [ 38.923851] ? __pfx_mmap_region+0x10/0x10 [ 38.924420] ? security_mmap_addr+0x7d/0xa0 [ 38.924998] ? get_unmapped_area+0x1f5/0x3f0 [ 38.925587] do_mmap+0x854/0xf00 [ 38.926057] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.926606] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.927212] ksys_mmap_pgoff+0x3af/0x500 [ 38.927759] do_syscall_64+0x3f/0x90 [ 38.928274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928960] RIP: 0033:0x7f83edf81d82 [ 38.929451] 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 [ 38.931735] RSP: 002b:00007ffe7ad34f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.932703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83edf81d82 [ 38.933614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83ed3bb000 [ 38.934590] RBP: 00007f83ed3bb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.935500] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561efc151ec0 [ 38.936405] R13: 00007ffe7ad34f20 R14: 00007ffe7ad34f50 R15: 00007ffe7ad352b0 [ 38.937318] [ 38.937630] [ 38.937857] Allocated by task 213: [ 38.938327] kasan_save_stack+0x22/0x50 [ 38.938864] kasan_set_track+0x25/0x30 [ 38.939385] __kasan_slab_alloc+0x59/0x70 [ 38.939950] kmem_cache_alloc+0x16b/0x370 [ 38.940515] vm_area_dup+0x20/0x160 [ 38.941007] __split_vma+0x170/0x950 [ 38.941510] split_vma+0xc6/0x110 [ 38.941980] mprotect_fixup+0x8d2/0xb30 [ 38.942537] do_mprotect_pkey+0x87e/0xd40 [ 38.943097] __x64_sys_mprotect+0x78/0xc0 [ 38.943699] do_syscall_64+0x3f/0x90 [ 38.944209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.944894] [ 38.945121] Freed by task 213: [ 38.945543] kasan_save_stack+0x22/0x50 [ 38.946087] kasan_set_track+0x25/0x30 [ 38.946632] kasan_save_free_info+0x2b/0x50 [ 38.947205] __kasan_slab_free+0x10a/0x190 [ 38.947799] kmem_cache_free+0x10d/0x4d0 [ 38.948336] rcu_core+0x8c8/0x2860 [ 38.948820] __do_softirq+0x1b7/0x7d4 [ 38.949334] [ 38.949564] Last potentially related work creation: [ 38.950183] kasan_save_stack+0x22/0x50 [ 38.950731] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951351] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952033] remove_vma+0x139/0x170 [ 38.952514] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953115] do_vmi_munmap+0x1f1/0x2b0 [ 38.953629] __vm_munmap+0x138/0x3a0 [ 38.954136] __x64_sys_munmap+0x59/0x80 [ 38.954687] do_syscall_64+0x3f/0x90 [ 38.955201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955893] [ 38.956122] The buggy address belongs to the object at ffff888015ebc1d0 [ 38.956122] which belongs to the cache vm_area_struct of size 168 [ 38.957714] The buggy address is located 88 bytes inside of [ 38.957714] freed 168-byte region [ffff888015ebc1d0, ffff888015ebc278) [ 38.959258] [ 38.959488] The buggy address belongs to the physical page: [ 38.960198] page:0000000085bfac78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ebc [ 38.961369] memcg:ffff888015fb7301 [ 38.961822] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.962529] page_type: 0xffffffff() [ 38.963017] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.964007] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015fb7301 [ 38.964979] page dumped because: kasan: bad access detected [ 38.965685] [ 38.965919] Memory state around the buggy address: [ 38.966592] ffff888015ebc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.967515] ffff888015ebc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.968457] >ffff888015ebc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.969382] ^ [ 38.969968] ffff888015ebc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.970889] ffff888015ebc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.971788] ================================================================== [ 38.972874] Disabling lock debugging due to kernel taint [ 40.954894] BUG: Bad rss-counter state mm:00000000f8cd1941 type:MM_FILEPAGES val:33 [ 40.956083] BUG: Bad rss-counter state mm:00000000f8cd1941 type:MM_ANONPAGES val:22 [ 41.361923] BUG: Bad rss-counter state mm:0000000099f170ad type:MM_FILEPAGES val:33 [ 41.362949] BUG: Bad rss-counter state mm:0000000099f170ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45745' (ECDSA) to the list of known hosts. 2023/06/20 16:38:59 fuzzer started 2023/06/20 16:38:59 dialing manager at localhost:36067 2023/06/20 16:38:59 checking machine... 2023/06/20 16:38:59 checking revisions... [ 41.958574] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:38:59 testing simple program... [ 42.016737] cgroup: Unknown subsys name 'net' [ 42.109460] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:38:59 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff88806ce09a98 RCX=ffffffff86138e01 RDX=1ffff1100d9c1353 RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a80 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800694b680 R15=ffff88800ef11ec0 RIP=ffffffff81130368 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 00007f11bbab1900 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=00007f19485b7650 CR3=000000000ca2a000 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=d1564cf10ed60e90e04cb1eb14e2f4f3 XMM02=eff9b2d0a8fce9cb000000000011aa08 XMM03=2c67c8bc2e329bc3000000000011ab30 XMM04=1e2344395c2b120f00000000000ae988 XMM05=f30c3b3bd046c53100000000001324a8 XMM06=19e9129bd510f2350000000000130fd0 XMM07=fb795ef6d657705600000000001214d0 XMM08=2c67c8bc2e329bc3000000000011ab30 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=0000000000000001 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=00007ffd57491ca8 CR3=000000001622c000 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=2039353a38333a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a38333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000