syzkaller login: [ 30.514022] BUG: Bad rss-counter state mm:000000002e11a26b type:MM_FILEPAGES val:33 [ 30.515367] BUG: Bad rss-counter state mm:000000002e11a26b type:MM_ANONPAGES val:22 [ 30.660316] ================================================================== [ 30.661414] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.662669] Read of size 8 at addr ffff888015d2aed8 by task sshd/220 [ 30.663595] [ 30.663862] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.664902] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.666114] Call Trace: [ 30.666498] [ 30.666845] dump_stack_lvl+0x91/0xf0 [ 30.667355] print_report+0xcc/0x620 [ 30.667847] ? __virt_addr_valid+0x102/0x340 [ 30.668418] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.669049] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.669676] kasan_report+0xbe/0xf0 [ 30.670174] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.670794] vma_interval_tree_remove+0xc75/0xec0 [ 30.671395] vma_prepare+0xc54/0x11a0 [ 30.671878] __split_vma+0x5af/0x950 [ 30.672348] ? __pfx___split_vma+0x10/0x10 [ 30.672881] ? find_held_lock+0x2c/0x110 [ 30.673404] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.673976] ? lock_is_held_type+0x9f/0x120 [ 30.674520] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.675129] ? mtree_range_walk+0x632/0x900 [ 30.675683] ? mas_walk+0x5c7/0x7c0 [ 30.676168] do_vmi_munmap+0x1f1/0x2b0 [ 30.676660] mmap_region+0x1f9/0x2660 [ 30.677143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.677659] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.678402] ? __pfx_lock_acquire+0x10/0x10 [ 30.678945] ? __pfx_mmap_region+0x10/0x10 [ 30.679484] ? security_mmap_addr+0x7d/0xa0 [ 30.680018] ? get_unmapped_area+0x1f5/0x3f0 [ 30.680571] do_mmap+0x854/0xf00 [ 30.681023] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.681522] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.682094] ksys_mmap_pgoff+0x3af/0x500 [ 30.682604] do_syscall_64+0x3f/0x90 [ 30.683086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.683733] RIP: 0033:0x7fa8ea694d82 [ 30.684191] 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 [ 30.686381] RSP: 002b:00007ffca6f55968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.687299] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8ea694d82 [ 30.688168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8e9ace000 [ 30.689023] RBP: 00007fa8e9ace000 R08: 0000000000000009 R09: 0000000000001000 [ 30.689892] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f28707a980 [ 30.690769] R13: 00007ffca6f55980 R14: 00007ffca6f559b0 R15: 00007ffca6f55d10 [ 30.691653] [ 30.691948] [ 30.692166] Allocated by task 213: [ 30.692593] kasan_save_stack+0x22/0x50 [ 30.693106] kasan_set_track+0x25/0x30 [ 30.693622] __kasan_slab_alloc+0x59/0x70 [ 30.694167] kmem_cache_alloc+0x16b/0x370 [ 30.694690] vm_area_dup+0x20/0x160 [ 30.695159] __split_vma+0x170/0x950 [ 30.695629] split_vma+0xc6/0x110 [ 30.696077] mprotect_fixup+0x8d2/0xb30 [ 30.696587] do_mprotect_pkey+0x87e/0xd40 [ 30.697113] __x64_sys_mprotect+0x78/0xc0 [ 30.697641] do_syscall_64+0x3f/0x90 [ 30.698140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.698793] [ 30.699014] Freed by task 19: [ 30.699401] kasan_save_stack+0x22/0x50 [ 30.699904] kasan_set_track+0x25/0x30 [ 30.700396] kasan_save_free_info+0x2b/0x50 [ 30.700938] __kasan_slab_free+0x10a/0x190 [ 30.701478] kmem_cache_free+0x10d/0x4d0 [ 30.701999] rcu_core+0x8c8/0x2860 [ 30.702449] __do_softirq+0x1b7/0x7d4 [ 30.702932] [ 30.703159] Last potentially related work creation: [ 30.703751] kasan_save_stack+0x22/0x50 [ 30.704336] __kasan_record_aux_stack+0x8e/0xa0 [ 30.704914] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.705558] remove_vma+0x139/0x170 [ 30.706032] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.706588] do_vmi_munmap+0x1f1/0x2b0 [ 30.707097] __vm_munmap+0x138/0x3a0 [ 30.707573] __x64_sys_munmap+0x59/0x80 [ 30.708092] do_syscall_64+0x3f/0x90 [ 30.708577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.709240] [ 30.709455] The buggy address belongs to the object at ffff888015d2ae80 [ 30.709455] which belongs to the cache vm_area_struct of size 168 [ 30.710945] The buggy address is located 88 bytes inside of [ 30.710945] freed 168-byte region [ffff888015d2ae80, ffff888015d2af28) [ 30.712356] [ 30.712575] The buggy address belongs to the physical page: [ 30.713252] page:0000000040a75b6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d2a [ 30.714370] memcg:ffff88800f442401 [ 30.714809] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.715467] page_type: 0xffffffff() [ 30.715913] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.716833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f442401 [ 30.717735] page dumped because: kasan: bad access detected [ 30.718409] [ 30.718624] Memory state around the buggy address: [ 30.719203] ffff888015d2ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.720061] ffff888015d2ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.720918] >ffff888015d2ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.721763] ^ [ 30.722507] ffff888015d2af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.723365] ffff888015d2af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.724218] ================================================================== [ 30.725302] Disabling lock debugging due to kernel taint [ 32.813159] BUG: Bad rss-counter state mm:0000000021f65d9a type:MM_FILEPAGES val:33 [ 32.814257] BUG: Bad rss-counter state mm:0000000021f65d9a type:MM_ANONPAGES val:22 [ 33.308066] BUG: Bad rss-counter state mm:000000005160d402 type:MM_FILEPAGES val:33 [ 33.309130] BUG: Bad rss-counter state mm:000000005160d402 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51502' (ECDSA) to the list of known hosts. 2023/06/20 14:40:39 fuzzer started 2023/06/20 14:40:40 dialing manager at localhost:36067 2023/06/20 14:40:40 checking machine... 2023/06/20 14:40:40 checking revisions... [ 33.988778] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:40:40 testing simple program... [ 34.032946] cgroup: Unknown subsys name 'net' [ 34.070275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:40:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffe7195de58 CR3=0000000016ace000 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=2039333a30343a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a30343a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b10 RCX=0000000000000001 RDX=ffff88806cf09b28 RSI=ffff88806cf09b10 RDI=ffff88806cf09a88 RBP=dffffc0000000000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffffed100d9e1351 R13=ffffed100d9e1350 R14=ffff88806cf09ac0 R15=ffff88806cf09a78 RIP=ffffffff81132f8e RFL=00000212 [----A--] 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 00007f0c27604900 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=00007f0c27bbc0b0 CR3=000000000d8ce000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000