syzkaller login: [ 32.553020] BUG: Bad rss-counter state mm:000000001ba46c69 type:MM_FILEPAGES val:33 [ 32.554030] BUG: Bad rss-counter state mm:000000001ba46c69 type:MM_ANONPAGES val:22 [ 32.715652] ================================================================== [ 32.716747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.717858] Read of size 8 at addr ffff888019ea7880 by task sshd/220 [ 32.718859] [ 32.719116] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.720151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.721279] Call Trace: [ 32.721604] [ 32.721900] dump_stack_lvl+0x91/0xf0 [ 32.722396] print_report+0xcc/0x620 [ 32.722885] ? __virt_addr_valid+0x102/0x340 [ 32.723439] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.724045] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.724676] kasan_report+0xbe/0xf0 [ 32.725147] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.725758] vma_interval_tree_remove+0xc75/0xec0 [ 32.726351] vma_prepare+0xc54/0x11a0 [ 32.726827] __split_vma+0x5af/0x950 [ 32.727295] ? __pfx___split_vma+0x10/0x10 [ 32.727829] ? find_held_lock+0x2c/0x110 [ 32.728349] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.728915] ? lock_is_held_type+0x9f/0x120 [ 32.729449] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.730051] ? mtree_range_walk+0x632/0x900 [ 32.730603] ? mas_walk+0x5c7/0x7c0 [ 32.731073] do_vmi_munmap+0x1f1/0x2b0 [ 32.731562] mmap_region+0x1f9/0x2660 [ 32.732042] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.732582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.733287] ? __pfx_lock_acquire+0x10/0x10 [ 32.733816] ? __pfx_mmap_region+0x10/0x10 [ 32.734340] ? security_mmap_addr+0x7d/0xa0 [ 32.734865] ? get_unmapped_area+0x1f5/0x3f0 [ 32.735405] do_mmap+0x854/0xf00 [ 32.735843] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.736349] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.736914] ksys_mmap_pgoff+0x3af/0x500 [ 32.737419] do_syscall_64+0x3f/0x90 [ 32.737902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.738542] RIP: 0033:0x7f0e6a3ffd82 [ 32.738994] 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 [ 32.741133] RSP: 002b:00007ffca4c9f938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.742043] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e6a3ffd82 [ 32.742893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e69839000 [ 32.743741] RBP: 00007f0e69839000 R08: 0000000000000009 R09: 0000000000001000 [ 32.744616] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec6d757f60 [ 32.745457] R13: 00007ffca4c9f950 R14: 00007ffca4c9f980 R15: 00007ffca4c9fce0 [ 32.746326] [ 32.746619] [ 32.746832] Allocated by task 213: [ 32.747264] kasan_save_stack+0x22/0x50 [ 32.747764] kasan_set_track+0x25/0x30 [ 32.748256] __kasan_slab_alloc+0x59/0x70 [ 32.748785] kmem_cache_alloc+0x16b/0x370 [ 32.749299] vm_area_dup+0x20/0x160 [ 32.749757] __split_vma+0x170/0x950 [ 32.750217] split_vma+0xc6/0x110 [ 32.750653] mprotect_fixup+0x8d2/0xb30 [ 32.751148] do_mprotect_pkey+0x87e/0xd40 [ 32.751670] __x64_sys_mprotect+0x78/0xc0 [ 32.752191] do_syscall_64+0x3f/0x90 [ 32.752661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.753296] [ 32.753512] Freed by task 213: [ 32.753903] kasan_save_stack+0x22/0x50 [ 32.754401] kasan_set_track+0x25/0x30 [ 32.754892] kasan_save_free_info+0x2b/0x50 [ 32.755420] __kasan_slab_free+0x10a/0x190 [ 32.755950] kmem_cache_free+0x10d/0x4d0 [ 32.756464] rcu_core+0x8c8/0x2860 [ 32.756902] __do_softirq+0x1b7/0x7d4 [ 32.757373] [ 32.757585] Last potentially related work creation: [ 32.758165] kasan_save_stack+0x22/0x50 [ 32.758664] __kasan_record_aux_stack+0x8e/0xa0 [ 32.759253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.759894] remove_vma+0x139/0x170 [ 32.760354] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.760910] do_vmi_munmap+0x1f1/0x2b0 [ 32.761388] __vm_munmap+0x138/0x3a0 [ 32.761850] __x64_sys_munmap+0x59/0x80 [ 32.762343] do_syscall_64+0x3f/0x90 [ 32.762814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.763452] [ 32.763664] The buggy address belongs to the object at ffff888019ea7828 [ 32.763664] which belongs to the cache vm_area_struct of size 168 [ 32.765127] The buggy address is located 88 bytes inside of [ 32.765127] freed 168-byte region [ffff888019ea7828, ffff888019ea78d0) [ 32.766520] [ 32.766733] The buggy address belongs to the physical page: [ 32.767391] page:00000000bd3e0c8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ea7 [ 32.768488] memcg:ffff888009aac401 [ 32.768910] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.769542] page_type: 0xffffffff() [ 32.769987] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.770899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009aac401 [ 32.771790] page dumped because: kasan: bad access detected [ 32.772446] [ 32.772657] Memory state around the buggy address: [ 32.773234] ffff888019ea7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.774086] ffff888019ea7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.774945] >ffff888019ea7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.775790] ^ [ 32.776214] ffff888019ea7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.777067] ffff888019ea7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.777912] ================================================================== [ 32.778965] Disabling lock debugging due to kernel taint [ 35.416012] BUG: Bad rss-counter state mm:00000000325afff9 type:MM_FILEPAGES val:33 [ 35.417222] BUG: Bad rss-counter state mm:00000000325afff9 type:MM_ANONPAGES val:22 [ 35.835406] BUG: Bad rss-counter state mm:0000000062b80f40 type:MM_FILEPAGES val:33 [ 35.836637] BUG: Bad rss-counter state mm:0000000062b80f40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19005' (ECDSA) to the list of known hosts. 2023/06/19 11:55:45 fuzzer started 2023/06/19 11:55:45 dialing manager at localhost:44161 2023/06/19 11:55:45 checking machine... 2023/06/19 11:55:45 checking revisions... [ 36.544982] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:55:45 testing simple program... [ 36.596861] cgroup: Unknown subsys name 'net' [ 36.632263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:55:43 Registers: info registers vcpu 0 RAX=1ffff11001d2bf43 RBX=ffff88800e95f9e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e95fa18 RBP=ffff88800e71a5c0 RSP=ffff888008d7fcb8 R8 =0000000000000001 R9 =ffffed10011aff8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800e71a5c0 R14=ffffffff813782a8 R15=ffff88800e71a5c0 RIP=ffffffff8184636c RFL=00000046 [---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=000055905b295b40 CR3=000000000efca000 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=2034343a35353a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a35353a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9e1329 RSP=ffff88806cf09938 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff88800d947100 RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007f42e9195900 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=00007f42e974d0b0 CR3=000000000fc12000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000