syzkaller login: [ 30.462952] BUG: Bad rss-counter state mm:00000000f92f3ea3 type:MM_FILEPAGES val:33 [ 30.464100] BUG: Bad rss-counter state mm:00000000f92f3ea3 type:MM_ANONPAGES val:22 [ 30.595798] ================================================================== [ 30.596471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.597145] Read of size 8 at addr ffff888016ea43f8 by task sshd/219 [ 30.597652] [ 30.597797] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.598385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.599092] Call Trace: [ 30.599306] [ 30.599497] dump_stack_lvl+0x91/0xf0 [ 30.599843] print_report+0xcc/0x620 [ 30.600429] ? __virt_addr_valid+0x102/0x340 [ 30.600806] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.601229] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.601647] kasan_report+0xbe/0xf0 [ 30.601964] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.602378] vma_interval_tree_remove+0xc75/0xec0 [ 30.602818] vma_prepare+0xc54/0x11a0 [ 30.603147] __split_vma+0x5af/0x950 [ 30.603473] ? __pfx___split_vma+0x10/0x10 [ 30.603838] ? find_held_lock+0x2c/0x110 [ 30.604179] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.604557] ? lock_is_held_type+0x9f/0x120 [ 30.604919] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.605309] ? mtree_range_walk+0x632/0x900 [ 30.605667] ? mas_walk+0x5c7/0x7c0 [ 30.605978] do_vmi_munmap+0x1f1/0x2b0 [ 30.606300] mmap_region+0x1f9/0x2660 [ 30.606670] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.606993] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.607455] ? __pfx_lock_acquire+0x10/0x10 [ 30.607826] ? __pfx_mmap_region+0x10/0x10 [ 30.608166] ? security_mmap_addr+0x7d/0xa0 [ 30.608524] ? get_unmapped_area+0x1f5/0x3f0 [ 30.608915] do_mmap+0x854/0xf00 [ 30.609230] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.609567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.609946] ksys_mmap_pgoff+0x3af/0x500 [ 30.610300] do_syscall_64+0x3f/0x90 [ 30.610654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.611063] RIP: 0033:0x7efee2278d82 [ 30.611392] 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 [ 30.612952] RSP: 002b:00007ffd58d83a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.613569] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efee2278d82 [ 30.614143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efee16b2000 [ 30.614810] RBP: 00007efee16b2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.615401] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bee982fd90 [ 30.615981] R13: 00007ffd58d83a40 R14: 00007ffd58d83a70 R15: 00007ffd58d83dd0 [ 30.616560] [ 30.616768] [ 30.616915] Allocated by task 212: [ 30.617219] kasan_save_stack+0x22/0x50 [ 30.617571] kasan_set_track+0x25/0x30 [ 30.617915] __kasan_slab_alloc+0x59/0x70 [ 30.618288] kmem_cache_alloc+0x16b/0x370 [ 30.618693] vm_area_dup+0x20/0x160 [ 30.619006] __split_vma+0x170/0x950 [ 30.619336] split_vma+0xc6/0x110 [ 30.619638] mprotect_fixup+0x8d2/0xb30 [ 30.619985] do_mprotect_pkey+0x87e/0xd40 [ 30.620360] __x64_sys_mprotect+0x78/0xc0 [ 30.620731] do_syscall_64+0x3f/0x90 [ 30.621060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.621513] [ 30.621660] Freed by task 202: [ 30.621933] kasan_save_stack+0x22/0x50 [ 30.622284] kasan_set_track+0x25/0x30 [ 30.622689] kasan_save_free_info+0x2b/0x50 [ 30.623061] __kasan_slab_free+0x10a/0x190 [ 30.623439] kmem_cache_free+0x10d/0x4d0 [ 30.623789] rcu_core+0x8c8/0x2860 [ 30.624104] __do_softirq+0x1b7/0x7d4 [ 30.624434] [ 30.624583] Last potentially related work creation: [ 30.624984] kasan_save_stack+0x22/0x50 [ 30.625331] __kasan_record_aux_stack+0x8e/0xa0 [ 30.625736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.626180] remove_vma+0x139/0x170 [ 30.626525] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.626919] do_vmi_munmap+0x1f1/0x2b0 [ 30.627259] __vm_munmap+0x138/0x3a0 [ 30.627597] __x64_sys_munmap+0x59/0x80 [ 30.627944] do_syscall_64+0x3f/0x90 [ 30.628286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.628744] [ 30.628899] The buggy address belongs to the object at ffff888016ea43a0 [ 30.628899] which belongs to the cache vm_area_struct of size 168 [ 30.630025] The buggy address is located 88 bytes inside of [ 30.630025] freed 168-byte region [ffff888016ea43a0, ffff888016ea4448) [ 30.631048] [ 30.631195] The buggy address belongs to the physical page: [ 30.631655] page:00000000a1a8e760 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ea4 [ 30.632417] memcg:ffff8880165bc601 [ 30.632712] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.633171] page_type: 0xffffffff() [ 30.633486] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.634140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165bc601 [ 30.634799] page dumped because: kasan: bad access detected [ 30.635251] [ 30.635393] Memory state around the buggy address: [ 30.635796] ffff888016ea4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.636409] ffff888016ea4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.637023] >ffff888016ea4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.637627] ^ [ 30.638167] ffff888016ea4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.638786] ffff888016ea4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.639358] ================================================================== [ 30.639983] Disabling lock debugging due to kernel taint [ 32.066016] BUG: Bad rss-counter state mm:00000000768447d5 type:MM_FILEPAGES val:33 [ 32.066839] BUG: Bad rss-counter state mm:00000000768447d5 type:MM_ANONPAGES val:22 [ 32.429829] BUG: Bad rss-counter state mm:0000000058c5d445 type:MM_FILEPAGES val:33 [ 32.430615] BUG: Bad rss-counter state mm:0000000058c5d445 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33717' (ECDSA) to the list of known hosts. 2023/06/21 08:55:34 fuzzer started 2023/06/21 08:55:34 dialing manager at localhost:36067 2023/06/21 08:55:34 checking machine... 2023/06/21 08:55:34 checking revisions... [ 33.037283] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:55:34 testing simple program... [ 33.082163] cgroup: Unknown subsys name 'net' [ 33.114659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:55:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11003368f14 RCX=0000000000000000 RDX=ffff88800f47b680 RSI=ffffffff81b354e8 RDI=0000000000000005 RBP=ffff888019203e20 RSP=ffff888019b47898 R8 =0000000000000005 R9 =00000000fffffffb R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=dffffc0000000000 R14=ffff888019203e48 R15=ffff88800ff06000 RIP=ffffffff81b354e8 RFL=00000293 [--S-A-C] 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 00007f462325f700 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=00007ffc3acab888 CR3=0000000015898000 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=2033333a35353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a35353a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000055e04b641eb0 RBX=000055e04b65fed0 RCX=0000000000000016 RDX=0000000000000006 RSI=000055e04b653630 RDI=0000000000000078 RBP=00007ffea9ebea20 RSP=00007ffea9ebe9b8 R8 =000055e04b641eb0 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000246 R12=00007f968e8d9900 R13=00007ffea9ebea28 R14=00007f968e8b4b22 R15=0000000000000000 RIP=00007f968ed5719d RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f968e8d9900 00000000 00000000 GS =0000 0000000000000000 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=00007ffea9eb9000 CR3=000000000e82a000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000