syzkaller login: [ 30.363561] BUG: Bad rss-counter state mm:00000000141d5a1a type:MM_FILEPAGES val:33 [ 30.364350] BUG: Bad rss-counter state mm:00000000141d5a1a type:MM_ANONPAGES val:22 [ 30.528282] ================================================================== [ 30.528959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.529616] Read of size 8 at addr ffff88800fb02140 by task sshd/220 [ 30.530155] [ 30.530307] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.530916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.531612] Call Trace: [ 30.531836] [ 30.532039] dump_stack_lvl+0x91/0xf0 [ 30.532390] print_report+0xcc/0x620 [ 30.532739] ? __virt_addr_valid+0x102/0x340 [ 30.533134] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.533562] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.534000] kasan_report+0xbe/0xf0 [ 30.534332] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.534773] vma_interval_tree_remove+0xc75/0xec0 [ 30.535363] vma_prepare+0xc54/0x11a0 [ 30.535698] __split_vma+0x5af/0x950 [ 30.536031] ? __pfx___split_vma+0x10/0x10 [ 30.536398] ? find_held_lock+0x2c/0x110 [ 30.536768] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.537163] ? lock_is_held_type+0x9f/0x120 [ 30.537544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.537968] ? mtree_range_walk+0x632/0x900 [ 30.538358] ? mas_walk+0x5c7/0x7c0 [ 30.538691] do_vmi_munmap+0x1f1/0x2b0 [ 30.539061] mmap_region+0x1f9/0x2660 [ 30.539397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.539753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.540256] ? __pfx_lock_acquire+0x10/0x10 [ 30.540626] ? __pfx_mmap_region+0x10/0x10 [ 30.540997] ? security_mmap_addr+0x7d/0xa0 [ 30.541382] ? get_unmapped_area+0x1f5/0x3f0 [ 30.541773] do_mmap+0x854/0xf00 [ 30.542088] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.542431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.542823] ksys_mmap_pgoff+0x3af/0x500 [ 30.543211] do_syscall_64+0x3f/0x90 [ 30.543549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.543998] RIP: 0033:0x7f0bd4f9cd82 [ 30.544314] 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 [ 30.545803] RSP: 002b:00007fffa50c3e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.546449] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bd4f9cd82 [ 30.547085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bd43d6000 [ 30.547681] RBP: 00007f0bd43d6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.548274] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6d508fec0 [ 30.548874] R13: 00007fffa50c3e70 R14: 00007fffa50c3ea0 R15: 00007fffa50c4200 [ 30.549484] [ 30.549688] [ 30.549842] Allocated by task 213: [ 30.550151] kasan_save_stack+0x22/0x50 [ 30.550513] kasan_set_track+0x25/0x30 [ 30.550893] __kasan_slab_alloc+0x59/0x70 [ 30.551315] kmem_cache_alloc+0x16b/0x370 [ 30.551690] vm_area_dup+0x20/0x160 [ 30.552039] __split_vma+0x170/0x950 [ 30.552371] split_vma+0xc6/0x110 [ 30.552681] mprotect_fixup+0x8d2/0xb30 [ 30.553044] do_mprotect_pkey+0x87e/0xd40 [ 30.553420] __x64_sys_mprotect+0x78/0xc0 [ 30.553793] do_syscall_64+0x3f/0x90 [ 30.554143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.554597] [ 30.554754] Freed by task 203: [ 30.555064] kasan_save_stack+0x22/0x50 [ 30.555423] kasan_set_track+0x25/0x30 [ 30.555775] kasan_save_free_info+0x2b/0x50 [ 30.556150] __kasan_slab_free+0x10a/0x190 [ 30.556523] kmem_cache_free+0x10d/0x4d0 [ 30.556875] rcu_core+0x8c8/0x2860 [ 30.557185] __do_softirq+0x1b7/0x7d4 [ 30.557519] [ 30.557673] Last potentially related work creation: [ 30.558077] kasan_save_stack+0x22/0x50 [ 30.558424] __kasan_record_aux_stack+0x8e/0xa0 [ 30.558828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.559317] remove_vma+0x139/0x170 [ 30.559637] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.560078] do_vmi_munmap+0x1f1/0x2b0 [ 30.560544] __vm_munmap+0x138/0x3a0 [ 30.561017] __x64_sys_munmap+0x59/0x80 [ 30.561365] do_syscall_64+0x3f/0x90 [ 30.561702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.562165] [ 30.562317] The buggy address belongs to the object at ffff88800fb020e8 [ 30.562317] which belongs to the cache vm_area_struct of size 168 [ 30.563421] The buggy address is located 88 bytes inside of [ 30.563421] freed 168-byte region [ffff88800fb020e8, ffff88800fb02190) [ 30.564426] [ 30.564578] The buggy address belongs to the physical page: [ 30.565041] page:00000000b9f7ddf6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb02 [ 30.565797] memcg:ffff888016b8b501 [ 30.566095] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.566550] page_type: 0xffffffff() [ 30.566873] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.567555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b8b501 [ 30.568206] page dumped because: kasan: bad access detected [ 30.568681] [ 30.568836] Memory state around the buggy address: [ 30.569265] ffff88800fb02000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.570210] ffff88800fb02080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.570819] >ffff88800fb02100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.571444] ^ [ 30.571898] ffff88800fb02180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.572517] ffff88800fb02200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.573120] ================================================================== [ 30.573910] Disabling lock debugging due to kernel taint [ 32.276077] BUG: Bad rss-counter state mm:0000000062ef817d type:MM_FILEPAGES val:33 [ 32.276802] BUG: Bad rss-counter state mm:0000000062ef817d type:MM_ANONPAGES val:22 [ 32.650768] BUG: Bad rss-counter state mm:00000000aeb2d310 type:MM_FILEPAGES val:33 [ 32.651462] BUG: Bad rss-counter state mm:00000000aeb2d310 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31858' (ECDSA) to the list of known hosts. 2023/06/21 09:08:37 fuzzer started 2023/06/21 09:08:37 dialing manager at localhost:36067 2023/06/21 09:08:37 checking machine... 2023/06/21 09:08:37 checking revisions... [ 33.215725] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:08:37 testing simple program... [ 33.255939] cgroup: Unknown subsys name 'net' [ 33.311448] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8118ddc3 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88806ce09a98 RIP=ffffffff8113062c 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=00007ff217c78440 CR3=0000000019968000 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=2037333a38303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a38303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00003ef080 RCX=0000000000000100 RDX=ffff888016fab680 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806cf09db0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea000067bf40 R14=ffffffff813782f8 R15=ffff888019efdda8 RIP=ffffffff8180c617 RFL=00000282 [--S----] 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 00007f347688d900 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=00007ffd30681000 CR3=0000000016812000 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=6720646572637465733a4d41503d706f 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