syzkaller login: [ 31.615316] BUG: Bad rss-counter state mm:000000001f3cd58c type:MM_FILEPAGES val:33 [ 31.616331] BUG: Bad rss-counter state mm:000000001f3cd58c type:MM_ANONPAGES val:22 [ 31.782173] ================================================================== [ 31.783103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.784055] Read of size 8 at addr ffff88800dd70310 by task sshd/219 [ 31.784826] [ 31.785138] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.786008] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.787000] Call Trace: [ 31.787340] [ 31.787622] dump_stack_lvl+0x91/0xf0 [ 31.788118] print_report+0xcc/0x620 [ 31.788604] ? __virt_addr_valid+0x102/0x340 [ 31.789157] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.789797] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.790428] kasan_report+0xbe/0xf0 [ 31.790902] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.791522] vma_interval_tree_remove+0xc75/0xec0 [ 31.792123] vma_prepare+0xc54/0x11a0 [ 31.792606] __split_vma+0x5af/0x950 [ 31.793088] ? __pfx___split_vma+0x10/0x10 [ 31.793616] ? find_held_lock+0x2c/0x110 [ 31.794147] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.794739] ? lock_is_held_type+0x9f/0x120 [ 31.795277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.795882] ? mtree_range_walk+0x632/0x900 [ 31.796427] ? mas_walk+0x5c7/0x7c0 [ 31.796897] do_vmi_munmap+0x1f1/0x2b0 [ 31.797383] mmap_region+0x1f9/0x2660 [ 31.797864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.798406] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.799124] ? __pfx_lock_acquire+0x10/0x10 [ 31.799655] ? __pfx_mmap_region+0x10/0x10 [ 31.800184] ? security_mmap_addr+0x7d/0xa0 [ 31.800716] ? get_unmapped_area+0x1f5/0x3f0 [ 31.801262] do_mmap+0x854/0xf00 [ 31.801705] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.802210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.802768] ksys_mmap_pgoff+0x3af/0x500 [ 31.803272] do_syscall_64+0x3f/0x90 [ 31.803753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.804393] RIP: 0033:0x7f95dd8c6d82 [ 31.804846] 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 [ 31.807009] RSP: 002b:00007ffdf254c8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.807912] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95dd8c6d82 [ 31.808761] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95dcd00000 [ 31.809608] RBP: 00007f95dcd00000 R08: 0000000000000009 R09: 0000000000001000 [ 31.810468] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de02c7ab20 [ 31.811308] R13: 00007ffdf254c8d0 R14: 00007ffdf254c900 R15: 00007ffdf254cc60 [ 31.812164] [ 31.812453] [ 31.812667] Allocated by task 212: [ 31.813097] kasan_save_stack+0x22/0x50 [ 31.813600] kasan_set_track+0x25/0x30 [ 31.814114] __kasan_slab_alloc+0x59/0x70 [ 31.814650] kmem_cache_alloc+0x16b/0x370 [ 31.815167] vm_area_dup+0x20/0x160 [ 31.815619] __split_vma+0x170/0x950 [ 31.816081] split_vma+0xc6/0x110 [ 31.816519] mprotect_fixup+0x8d2/0xb30 [ 31.817026] do_mprotect_pkey+0x87e/0xd40 [ 31.817541] __x64_sys_mprotect+0x78/0xc0 [ 31.818089] do_syscall_64+0x3f/0x90 [ 31.818558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.819204] [ 31.819424] Freed by task 202: [ 31.819835] kasan_save_stack+0x22/0x50 [ 31.820347] kasan_set_track+0x25/0x30 [ 31.820844] kasan_save_free_info+0x2b/0x50 [ 31.821380] __kasan_slab_free+0x10a/0x190 [ 31.821918] kmem_cache_free+0x10d/0x4d0 [ 31.822437] rcu_core+0x8c8/0x2860 [ 31.822885] __do_softirq+0x1b7/0x7d4 [ 31.823372] [ 31.823583] Last potentially related work creation: [ 31.824169] kasan_save_stack+0x22/0x50 [ 31.824690] __kasan_record_aux_stack+0x8e/0xa0 [ 31.825265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.825922] remove_vma+0x139/0x170 [ 31.826374] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.826936] do_vmi_munmap+0x1f1/0x2b0 [ 31.827430] __vm_munmap+0x138/0x3a0 [ 31.827906] __x64_sys_munmap+0x59/0x80 [ 31.828400] do_syscall_64+0x3f/0x90 [ 31.828871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.829512] [ 31.829726] The buggy address belongs to the object at ffff88800dd702b8 [ 31.829726] which belongs to the cache vm_area_struct of size 168 [ 31.831210] The buggy address is located 88 bytes inside of [ 31.831210] freed 168-byte region [ffff88800dd702b8, ffff88800dd70360) [ 31.832608] [ 31.832823] The buggy address belongs to the physical page: [ 31.833486] page:00000000967a4460 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd70 [ 31.834573] memcg:ffff88800eb9dd01 [ 31.834998] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.835720] page_type: 0xffffffff() [ 31.836170] raw: 0100000000000200 ffff88800879fc80 ffffea000036e340 dead000000000007 [ 31.837094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb9dd01 [ 31.838009] page dumped because: kasan: bad access detected [ 31.838667] [ 31.838884] Memory state around the buggy address: [ 31.839468] ffff88800dd70200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.840322] ffff88800dd70280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.841172] >ffff88800dd70300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.842091] ^ [ 31.842555] ffff88800dd70380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.843412] ffff88800dd70400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.844386] ================================================================== [ 31.845540] Disabling lock debugging due to kernel taint [ 33.821755] BUG: Bad rss-counter state mm:00000000d5626222 type:MM_FILEPAGES val:33 [ 33.823163] BUG: Bad rss-counter state mm:00000000d5626222 type:MM_ANONPAGES val:22 [ 34.313755] BUG: Bad rss-counter state mm:00000000ff61cb57 type:MM_FILEPAGES val:33 [ 34.315232] BUG: Bad rss-counter state mm:00000000ff61cb57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20216' (ECDSA) to the list of known hosts. 2023/06/20 04:26:26 fuzzer started 2023/06/20 04:26:26 dialing manager at localhost:44161 2023/06/20 04:26:26 checking machine... 2023/06/20 04:26:26 checking revisions... [ 35.060182] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:26:26 testing simple program... [ 35.103799] cgroup: Unknown subsys name 'net' [ 35.160946] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:26:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f5ff9113470 CR3=0000000015cd0000 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=2035323a36323a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a36323a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800d969b40 RSI=ffffffff844a2f9a RDI=0000000000000005 RBP=ffff88800fdd6a00 RSP=ffff88800a057b18 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=ffff88800a057e88 R15=ffff88800a057e70 RIP=ffffffff814c081b 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 00007f104107f900 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=00007f104102e008 CR3=000000000f2c6000 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=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