syzkaller login: [ 30.042660] BUG: Bad rss-counter state mm:00000000fb61f608 type:MM_FILEPAGES val:33 [ 30.043713] BUG: Bad rss-counter state mm:00000000fb61f608 type:MM_ANONPAGES val:22 [ 30.214131] ================================================================== [ 30.215095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.216048] Read of size 8 at addr ffff8880167c7058 by task sshd/220 [ 30.216936] [ 30.217158] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.218036] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.219064] Call Trace: [ 30.219388] [ 30.219681] dump_stack_lvl+0x91/0xf0 [ 30.220177] print_report+0xcc/0x620 [ 30.220675] ? __virt_addr_valid+0x102/0x340 [ 30.221236] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.221861] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.222497] kasan_report+0xbe/0xf0 [ 30.222983] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.223607] vma_interval_tree_remove+0xc75/0xec0 [ 30.224222] vma_prepare+0xc54/0x11a0 [ 30.224705] __split_vma+0x5af/0x950 [ 30.225182] ? __pfx___split_vma+0x10/0x10 [ 30.225712] ? find_held_lock+0x2c/0x110 [ 30.226242] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.226838] ? lock_is_held_type+0x9f/0x120 [ 30.227382] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.227990] ? mtree_range_walk+0x632/0x900 [ 30.228548] ? mas_walk+0x5c7/0x7c0 [ 30.229032] do_vmi_munmap+0x1f1/0x2b0 [ 30.229526] mmap_region+0x1f9/0x2660 [ 30.230013] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.230536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.231252] ? __pfx_lock_acquire+0x10/0x10 [ 30.231786] ? __pfx_mmap_region+0x10/0x10 [ 30.232315] ? security_mmap_addr+0x7d/0xa0 [ 30.232860] ? get_unmapped_area+0x1f5/0x3f0 [ 30.233413] do_mmap+0x854/0xf00 [ 30.233856] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.234353] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.234926] ksys_mmap_pgoff+0x3af/0x500 [ 30.235439] do_syscall_64+0x3f/0x90 [ 30.235920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.236580] RIP: 0033:0x7fcb330c1d82 [ 30.237034] 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 [ 30.239187] RSP: 002b:00007ffeb801a778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.240103] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb330c1d82 [ 30.240959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb324fb000 [ 30.241810] RBP: 00007fcb324fb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.242696] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6b4facd90 [ 30.243584] R13: 00007ffeb801a790 R14: 00007ffeb801a7c0 R15: 00007ffeb801ab20 [ 30.244468] [ 30.244771] [ 30.244990] Allocated by task 213: [ 30.245442] kasan_save_stack+0x22/0x50 [ 30.245962] kasan_set_track+0x25/0x30 [ 30.246487] __kasan_slab_alloc+0x59/0x70 [ 30.247023] kmem_cache_alloc+0x16b/0x370 [ 30.247550] vm_area_dup+0x20/0x160 [ 30.248017] __split_vma+0x170/0x950 [ 30.248516] split_vma+0xc6/0x110 [ 30.248967] mprotect_fixup+0x8d2/0xb30 [ 30.249491] do_mprotect_pkey+0x87e/0xd40 [ 30.250020] __x64_sys_mprotect+0x78/0xc0 [ 30.250547] do_syscall_64+0x3f/0x90 [ 30.251026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.251678] [ 30.251897] Freed by task 213: [ 30.252297] kasan_save_stack+0x22/0x50 [ 30.252803] kasan_set_track+0x25/0x30 [ 30.253296] kasan_save_free_info+0x2b/0x50 [ 30.253829] __kasan_slab_free+0x10a/0x190 [ 30.254367] kmem_cache_free+0x10d/0x4d0 [ 30.254885] rcu_core+0x8c8/0x2860 [ 30.255337] __do_softirq+0x1b7/0x7d4 [ 30.255828] [ 30.256045] Last potentially related work creation: [ 30.256627] kasan_save_stack+0x22/0x50 [ 30.257131] __kasan_record_aux_stack+0x8e/0xa0 [ 30.257708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.258367] remove_vma+0x139/0x170 [ 30.258848] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.259424] do_vmi_munmap+0x1f1/0x2b0 [ 30.259917] __vm_munmap+0x138/0x3a0 [ 30.260396] __x64_sys_munmap+0x59/0x80 [ 30.260909] do_syscall_64+0x3f/0x90 [ 30.261387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.262045] [ 30.262265] The buggy address belongs to the object at ffff8880167c7000 [ 30.262265] which belongs to the cache vm_area_struct of size 168 [ 30.263758] The buggy address is located 88 bytes inside of [ 30.263758] freed 168-byte region [ffff8880167c7000, ffff8880167c70a8) [ 30.265174] [ 30.265389] The buggy address belongs to the physical page: [ 30.266059] page:000000004bf35b2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167c7 [ 30.267168] memcg:ffff88800eeaa701 [ 30.267606] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.268283] page_type: 0xffffffff() [ 30.268750] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.269677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeaa701 [ 30.270621] page dumped because: kasan: bad access detected [ 30.271303] [ 30.271520] Memory state around the buggy address: [ 30.272109] ffff8880167c6f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.272971] ffff8880167c6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.273851] >ffff8880167c7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.274732] ^ [ 30.275479] ffff8880167c7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.276358] ffff8880167c7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.277209] ================================================================== [ 30.278234] Disabling lock debugging due to kernel taint [ 32.559119] BUG: Bad rss-counter state mm:00000000e707875b type:MM_FILEPAGES val:33 [ 32.559866] BUG: Bad rss-counter state mm:00000000e707875b type:MM_ANONPAGES val:22 [ 33.086499] BUG: Bad rss-counter state mm:000000003787c8c1 type:MM_FILEPAGES val:33 [ 33.087700] BUG: Bad rss-counter state mm:000000003787c8c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28584' (ECDSA) to the list of known hosts. 2023/06/20 21:12:29 fuzzer started 2023/06/20 21:12:29 dialing manager at localhost:36067 2023/06/20 21:12:29 checking machine... 2023/06/20 21:12:29 checking revisions... [ 33.755432] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:12:29 testing simple program... [ 33.799991] cgroup: Unknown subsys name 'net' [ 33.832480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:12:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e5f6930 RCX=1ffff11001cbed12 RDX=0000000000000004 RSI=ffff888014763e44 RDI=ffff88800e5f692c RBP=0000000000000074 RSP=ffff8880147cf9f0 R8 =0000000000000001 R9 =ffff88800e5f692c R10=ffff88800e5f68e3 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800e5f693c R14=ffff88800e5f692c R15=ffff88800e5f6850 RIP=ffffffff844d8b6f RFL=00000297 [--S-APC] 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 00007ff7880c9900 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=00007ff7874e1b40 CR3=000000000d776000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=03d7a788b2d82bf500000000000ae988 XMM05=3f3f132769617f730000000000132900 XMM06=00c3ffa147b8d85700000000001319a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000008 RCX=ffffffff818e8251 RDX=ffff888016938000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019cf7e40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800948f900 R13=ffff8880087f78a0 R14=1ffff1100339efd1 R15=dffffc0000000000 RIP=ffffffff814c027c 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 00007fa91b89e900 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=00007ffe2508d000 CR3=000000000e726000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000