syzkaller login: [ 30.234171] BUG: Bad rss-counter state mm:00000000679614c9 type:MM_FILEPAGES val:33 [ 30.235236] BUG: Bad rss-counter state mm:00000000679614c9 type:MM_ANONPAGES val:22 [ 30.406121] ================================================================== [ 30.407167] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.408189] Read of size 8 at addr ffff88800eeb4140 by task sshd/221 [ 30.409145] [ 30.409383] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.410326] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.411396] Call Trace: [ 30.411748] [ 30.412059] dump_stack_lvl+0x91/0xf0 [ 30.412597] print_report+0xcc/0x620 [ 30.413154] ? __virt_addr_valid+0x102/0x340 [ 30.413761] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.414443] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.415118] kasan_report+0xbe/0xf0 [ 30.415638] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.416313] vma_interval_tree_remove+0xc75/0xec0 [ 30.416984] vma_prepare+0xc54/0x11a0 [ 30.417507] __split_vma+0x5af/0x950 [ 30.418027] ? __pfx___split_vma+0x10/0x10 [ 30.418608] ? find_held_lock+0x2c/0x110 [ 30.419176] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.419794] ? lock_is_held_type+0x9f/0x120 [ 30.420385] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.421057] ? mtree_range_walk+0x632/0x900 [ 30.421661] ? mas_walk+0x5c7/0x7c0 [ 30.422177] do_vmi_munmap+0x1f1/0x2b0 [ 30.422716] mmap_region+0x1f9/0x2660 [ 30.423244] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.423806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.424595] ? __pfx_lock_acquire+0x10/0x10 [ 30.425199] ? __pfx_mmap_region+0x10/0x10 [ 30.425778] ? security_mmap_addr+0x7d/0xa0 [ 30.426360] ? get_unmapped_area+0x1f5/0x3f0 [ 30.426959] do_mmap+0x854/0xf00 [ 30.427437] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.427981] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.428589] ksys_mmap_pgoff+0x3af/0x500 [ 30.429160] do_syscall_64+0x3f/0x90 [ 30.429681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.430387] RIP: 0033:0x7f34828a9d82 [ 30.430887] 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 [ 30.433225] RSP: 002b:00007ffd1da6e3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.434212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34828a9d82 [ 30.435138] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3481ce3000 [ 30.436061] RBP: 00007f3481ce3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.437001] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b3d7b8ec0 [ 30.437892] R13: 00007ffd1da6e400 R14: 00007ffd1da6e430 R15: 00007ffd1da6e790 [ 30.438801] [ 30.439108] [ 30.439335] Allocated by task 214: [ 30.439784] kasan_save_stack+0x22/0x50 [ 30.440319] kasan_set_track+0x25/0x30 [ 30.440848] __kasan_slab_alloc+0x59/0x70 [ 30.441404] kmem_cache_alloc+0x16b/0x370 [ 30.441957] vm_area_dup+0x20/0x160 [ 30.442435] __split_vma+0x170/0x950 [ 30.442934] split_vma+0xc6/0x110 [ 30.443402] mprotect_fixup+0x8d2/0xb30 [ 30.443928] do_mprotect_pkey+0x87e/0xd40 [ 30.444475] __x64_sys_mprotect+0x78/0xc0 [ 30.445043] do_syscall_64+0x3f/0x90 [ 30.445545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.446229] [ 30.446458] Freed by task 214: [ 30.446875] kasan_save_stack+0x22/0x50 [ 30.447415] kasan_set_track+0x25/0x30 [ 30.447930] kasan_save_free_info+0x2b/0x50 [ 30.448507] __kasan_slab_free+0x10a/0x190 [ 30.449070] kmem_cache_free+0x10d/0x4d0 [ 30.449603] rcu_core+0x8c8/0x2860 [ 30.450069] __do_softirq+0x1b7/0x7d4 [ 30.450570] [ 30.450805] Last potentially related work creation: [ 30.451419] kasan_save_stack+0x22/0x50 [ 30.451950] __kasan_record_aux_stack+0x8e/0xa0 [ 30.452553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.453249] remove_vma+0x139/0x170 [ 30.453722] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.454316] do_vmi_munmap+0x1f1/0x2b0 [ 30.454850] __vm_munmap+0x138/0x3a0 [ 30.455341] __x64_sys_munmap+0x59/0x80 [ 30.455864] do_syscall_64+0x3f/0x90 [ 30.456363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.457046] [ 30.457272] The buggy address belongs to the object at ffff88800eeb40e8 [ 30.457272] which belongs to the cache vm_area_struct of size 168 [ 30.458845] The buggy address is located 88 bytes inside of [ 30.458845] freed 168-byte region [ffff88800eeb40e8, ffff88800eeb4190) [ 30.460345] [ 30.460575] The buggy address belongs to the physical page: [ 30.461303] page:00000000fe902b07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeb4 [ 30.462463] memcg:ffff888014550801 [ 30.462920] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.463610] page_type: 0xffffffff() [ 30.464096] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.465330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014550801 [ 30.466568] page dumped because: kasan: bad access detected [ 30.467463] [ 30.467748] Memory state around the buggy address: [ 30.468527] ffff88800eeb4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.469709] ffff88800eeb4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.470853] >ffff88800eeb4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.471999] ^ [ 30.472858] ffff88800eeb4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.474017] ffff88800eeb4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.475169] ================================================================== [ 30.476548] Disabling lock debugging due to kernel taint [ 32.860538] BUG: Bad rss-counter state mm:000000007dbf0d0b type:MM_FILEPAGES val:33 [ 32.861744] BUG: Bad rss-counter state mm:000000007dbf0d0b type:MM_ANONPAGES val:22 [ 33.259056] BUG: Bad rss-counter state mm:0000000003bbc53b type:MM_FILEPAGES val:33 [ 33.260044] BUG: Bad rss-counter state mm:0000000003bbc53b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16163' (ECDSA) to the list of known hosts. 2023/06/21 02:17:54 fuzzer started 2023/06/21 02:17:54 dialing manager at localhost:36067 2023/06/21 02:17:54 checking machine... 2023/06/21 02:17:54 checking revisions... [ 34.012718] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:17:54 testing simple program... [ 34.055286] cgroup: Unknown subsys name 'net' [ 34.101924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:17:53 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff85652d08 RCX=0000000080000101 RDX=1ffffffff0aca5a1 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff888019a67410 RIP=ffffffff814c0871 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 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=00007f929ca671b0 CR3=000000000dbd6000 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=2033353a37313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864aa543 RBX=0000000000000001 RCX=ffffffff864aa53e RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff860499d0 RBP=ffff888019b971b0 RSP=ffff888019b970e8 R8 =ffffffff864aa51a R9 =ffff888019b97198 R10=0000000000038001 R11=00000000000b3c03 R12=ffff888019b971b8 R13=ffff888019b971a0 R14=ffff888019b97199 R15=ffff888019b97158 RIP=ffffffff81130a72 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 00007f1c6e3f0900 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=00007f1c6e3b5008 CR3=000000000e0be000 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