syzkaller login: [ 33.103182] BUG: Bad rss-counter state mm:00000000e54c39e8 type:MM_FILEPAGES val:33 [ 33.104415] BUG: Bad rss-counter state mm:00000000e54c39e8 type:MM_ANONPAGES val:22 [ 33.149946] ================================================================== [ 33.150852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.151925] Read of size 8 at addr ffff88800e083058 by task sshd/220 [ 33.152708] [ 33.152926] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.153774] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.154731] Call Trace: [ 33.155050] [ 33.155332] dump_stack_lvl+0x91/0xf0 [ 33.155813] print_report+0xcc/0x620 [ 33.156301] ? __virt_addr_valid+0x102/0x340 [ 33.156848] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.157456] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.158061] kasan_report+0xbe/0xf0 [ 33.158536] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.159154] vma_interval_tree_remove+0xc75/0xec0 [ 33.159757] vma_prepare+0xc54/0x11a0 [ 33.160265] __split_vma+0x5af/0x950 [ 33.160736] ? __pfx___split_vma+0x10/0x10 [ 33.161260] ? find_held_lock+0x2c/0x110 [ 33.161792] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.162358] ? lock_is_held_type+0x9f/0x120 [ 33.162904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.163505] ? mtree_range_walk+0x632/0x900 [ 33.164057] ? mas_walk+0x5c7/0x7c0 [ 33.164538] do_vmi_munmap+0x1f1/0x2b0 [ 33.165028] mmap_region+0x1f9/0x2660 [ 33.165507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.166020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.166732] ? __pfx_lock_acquire+0x10/0x10 [ 33.167267] ? __pfx_mmap_region+0x10/0x10 [ 33.167795] ? security_mmap_addr+0x7d/0xa0 [ 33.168344] ? get_unmapped_area+0x1f5/0x3f0 [ 33.168895] do_mmap+0x854/0xf00 [ 33.169335] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.169836] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.170392] ksys_mmap_pgoff+0x3af/0x500 [ 33.170900] do_syscall_64+0x3f/0x90 [ 33.171386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.172038] RIP: 0033:0x7f3192b46d82 [ 33.172522] 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 [ 33.174657] RSP: 002b:00007fff1cad2268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.175561] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3192b46d82 [ 33.176424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3191f80000 [ 33.177396] RBP: 00007f3191f80000 R08: 0000000000000009 R09: 0000000000001000 [ 33.178253] R10: 0000000000000812 R11: 0000000000000206 R12: 00005649a02ff980 [ 33.179096] R13: 00007fff1cad2280 R14: 00007fff1cad22b0 R15: 00007fff1cad2610 [ 33.179953] [ 33.180271] [ 33.180487] Allocated by task 213: [ 33.180927] kasan_save_stack+0x22/0x50 [ 33.181439] kasan_set_track+0x25/0x30 [ 33.181932] __kasan_slab_alloc+0x59/0x70 [ 33.182449] kmem_cache_alloc+0x16b/0x370 [ 33.182964] vm_area_dup+0x20/0x160 [ 33.183416] __split_vma+0x170/0x950 [ 33.183882] split_vma+0xc6/0x110 [ 33.184332] mprotect_fixup+0x8d2/0xb30 [ 33.184877] do_mprotect_pkey+0x87e/0xd40 [ 33.185400] __x64_sys_mprotect+0x78/0xc0 [ 33.185931] do_syscall_64+0x3f/0x90 [ 33.186416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.187051] [ 33.187264] Freed by task 213: [ 33.187654] kasan_save_stack+0x22/0x50 [ 33.188154] kasan_set_track+0x25/0x30 [ 33.188653] kasan_save_free_info+0x2b/0x50 [ 33.189181] __kasan_slab_free+0x10a/0x190 [ 33.189712] kmem_cache_free+0x10d/0x4d0 [ 33.190219] rcu_core+0x8c8/0x2860 [ 33.190657] __do_softirq+0x1b7/0x7d4 [ 33.191125] [ 33.191339] Last potentially related work creation: [ 33.191914] kasan_save_stack+0x22/0x50 [ 33.192429] __kasan_record_aux_stack+0x8e/0xa0 [ 33.192993] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.193623] remove_vma+0x139/0x170 [ 33.194071] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.194620] do_vmi_munmap+0x1f1/0x2b0 [ 33.195097] __vm_munmap+0x138/0x3a0 [ 33.195555] __x64_sys_munmap+0x59/0x80 [ 33.196042] do_syscall_64+0x3f/0x90 [ 33.196518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.197147] [ 33.197360] Second to last potentially related work creation: [ 33.198039] kasan_save_stack+0x22/0x50 [ 33.198559] __kasan_record_aux_stack+0x8e/0xa0 [ 33.199124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.199764] remove_vma+0x139/0x170 [ 33.200225] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.200774] do_vmi_munmap+0x1f1/0x2b0 [ 33.201252] mmap_region+0x1f9/0x2660 [ 33.201721] do_mmap+0x854/0xf00 [ 33.202148] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.202629] ksys_mmap_pgoff+0x3af/0x500 [ 33.203128] do_syscall_64+0x3f/0x90 [ 33.203601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.204239] [ 33.204452] The buggy address belongs to the object at ffff88800e083000 [ 33.204452] which belongs to the cache vm_area_struct of size 168 [ 33.205915] The buggy address is located 88 bytes inside of [ 33.205915] freed 168-byte region [ffff88800e083000, ffff88800e0830a8) [ 33.207298] [ 33.207511] The buggy address belongs to the physical page: [ 33.208168] page:00000000087be8ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe083 [ 33.209262] memcg:ffff88800dec8d01 [ 33.209692] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.210388] page_type: 0xffffffff() [ 33.210833] raw: 0100000000000200 ffff88800879fc80 ffffea000033f4c0 dead000000000003 [ 33.211742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dec8d01 [ 33.212647] page dumped because: kasan: bad access detected [ 33.213305] [ 33.213528] Memory state around the buggy address: [ 33.214110] ffff88800e082f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.214954] ffff88800e082f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.215797] >ffff88800e083000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.216657] ^ [ 33.217376] ffff88800e083080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.218220] ffff88800e083100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.219068] ================================================================== [ 33.220286] Disabling lock debugging due to kernel taint [ 35.072072] BUG: Bad rss-counter state mm:00000000b4122931 type:MM_FILEPAGES val:33 [ 35.073287] BUG: Bad rss-counter state mm:00000000b4122931 type:MM_ANONPAGES val:22 [ 35.528759] BUG: Bad rss-counter state mm:000000002f3fbc75 type:MM_FILEPAGES val:33 [ 35.529743] BUG: Bad rss-counter state mm:000000002f3fbc75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37764' (ECDSA) to the list of known hosts. 2023/06/19 18:31:44 fuzzer started 2023/06/19 18:31:44 dialing manager at localhost:44161 2023/06/19 18:31:44 checking machine... 2023/06/19 18:31:44 checking revisions... [ 36.289756] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:31:44 testing simple program... [ 36.346800] cgroup: Unknown subsys name 'net' [ 36.403903] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:31:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff888015a9d5b4 RBP=ffff888015a9d1c0 RSP=ffff888014307438 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888015a9d1c0 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888014307d36 RIP=ffffffff813744d5 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 00007f3d57951900 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=00007f3d56d40db0 CR3=000000000d8f4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d22ab3ffd3d45ae200000000000ae988 XMM05=eb5dd739d41230b10000000000136548 XMM06=4fda316b135da52b0000000000135278 XMM07=fb795ef6d657705600000000001247f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8175ceb4 RDX=ffff88800db68000 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000043 RSP=ffff88800f037cf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000001a037067 R13=ffff88801a037208 R14=ffff88800f037df0 R15=0000000000000000 RIP=ffffffff814c0245 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5237f00900 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=00007ffd0a641000 CR3=000000000d8a0000 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=00000000000000000000000000000000 XMM02=449b19719e0129737f05774a04167ebb XMM03=4e79ffe87389a5a4b25690975ca46200 XMM04=9d98837aa150b7b16500850f9ccfa4ba XMM05=000000000000000000ff0000000000ff XMM06=4e79837a7350a5a46500850f5ca46200 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000