syzkaller login: [ 31.107459] BUG: Bad rss-counter state mm:00000000d3ff9395 type:MM_FILEPAGES val:33 [ 31.109092] BUG: Bad rss-counter state mm:00000000d3ff9395 type:MM_ANONPAGES val:22 [ 31.246224] ================================================================== [ 31.247370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.248612] Read of size 8 at addr ffff88800ee835c8 by task sshd/221 [ 31.249457] [ 31.249685] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.250580] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.251625] Call Trace: [ 31.251950] [ 31.252243] dump_stack_lvl+0x91/0xf0 [ 31.252770] print_report+0xcc/0x620 [ 31.253272] ? __virt_addr_valid+0x102/0x340 [ 31.253832] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.254470] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255129] kasan_report+0xbe/0xf0 [ 31.255616] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256253] vma_interval_tree_remove+0xc75/0xec0 [ 31.256902] vma_prepare+0xc54/0x11a0 [ 31.257377] __split_vma+0x5af/0x950 [ 31.257851] ? __pfx___split_vma+0x10/0x10 [ 31.258405] ? find_held_lock+0x2c/0x110 [ 31.258968] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.259551] ? lock_is_held_type+0x9f/0x120 [ 31.260125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.260758] ? mtree_range_walk+0x632/0x900 [ 31.261317] ? mas_walk+0x5c7/0x7c0 [ 31.261797] do_vmi_munmap+0x1f1/0x2b0 [ 31.262295] mmap_region+0x1f9/0x2660 [ 31.262783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.263311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.264060] ? __pfx_lock_acquire+0x10/0x10 [ 31.264637] ? __pfx_mmap_region+0x10/0x10 [ 31.265186] ? security_mmap_addr+0x7d/0xa0 [ 31.265744] ? get_unmapped_area+0x1f5/0x3f0 [ 31.266309] do_mmap+0x854/0xf00 [ 31.266755] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.267258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.267833] ksys_mmap_pgoff+0x3af/0x500 [ 31.268353] do_syscall_64+0x3f/0x90 [ 31.268865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269535] RIP: 0033:0x7f7bfe574d82 [ 31.270004] 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 [ 31.272254] RSP: 002b:00007ffe598485c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.273196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7bfe574d82 [ 31.274082] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7bfd9ae000 [ 31.274965] RBP: 00007f7bfd9ae000 R08: 0000000000000009 R09: 0000000000001000 [ 31.275845] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f31b8f1ec0 [ 31.276741] R13: 00007ffe598485e0 R14: 00007ffe59848610 R15: 00007ffe59848970 [ 31.277638] [ 31.277937] [ 31.278154] Allocated by task 214: [ 31.278597] kasan_save_stack+0x22/0x50 [ 31.279120] kasan_set_track+0x25/0x30 [ 31.279634] __kasan_slab_alloc+0x59/0x70 [ 31.280171] kmem_cache_alloc+0x16b/0x370 [ 31.280710] vm_area_dup+0x20/0x160 [ 31.281177] __split_vma+0x170/0x950 [ 31.281653] split_vma+0xc6/0x110 [ 31.282099] mprotect_fixup+0x8d2/0xb30 [ 31.282599] do_mprotect_pkey+0x87e/0xd40 [ 31.283120] __x64_sys_mprotect+0x78/0xc0 [ 31.283651] do_syscall_64+0x3f/0x90 [ 31.284127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284780] [ 31.284993] Freed by task 214: [ 31.285386] kasan_save_stack+0x22/0x50 [ 31.285899] kasan_set_track+0x25/0x30 [ 31.286410] kasan_save_free_info+0x2b/0x50 [ 31.286954] __kasan_slab_free+0x10a/0x190 [ 31.287481] kmem_cache_free+0x10d/0x4d0 [ 31.287994] rcu_core+0x8c8/0x2860 [ 31.288443] __do_softirq+0x1b7/0x7d4 [ 31.288944] [ 31.289158] Last potentially related work creation: [ 31.289739] kasan_save_stack+0x22/0x50 [ 31.290240] __kasan_record_aux_stack+0x8e/0xa0 [ 31.290809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.291452] remove_vma+0x139/0x170 [ 31.291899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.292454] do_vmi_munmap+0x1f1/0x2b0 [ 31.292957] __vm_munmap+0x138/0x3a0 [ 31.293421] __x64_sys_munmap+0x59/0x80 [ 31.293913] do_syscall_64+0x3f/0x90 [ 31.294406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295051] [ 31.295267] Second to last potentially related work creation: [ 31.295938] kasan_save_stack+0x22/0x50 [ 31.296441] __kasan_record_aux_stack+0x8e/0xa0 [ 31.297020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.297667] remove_vma+0x139/0x170 [ 31.298114] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.298677] do_vmi_munmap+0x1f1/0x2b0 [ 31.299164] mmap_region+0x1f9/0x2660 [ 31.299653] do_mmap+0x854/0xf00 [ 31.300084] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.300569] ksys_mmap_pgoff+0x3af/0x500 [ 31.301073] do_syscall_64+0x3f/0x90 [ 31.301546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302209] [ 31.302434] The buggy address belongs to the object at ffff88800ee83570 [ 31.302434] which belongs to the cache vm_area_struct of size 168 [ 31.303895] The buggy address is located 88 bytes inside of [ 31.303895] freed 168-byte region [ffff88800ee83570, ffff88800ee83618) [ 31.305318] [ 31.305536] The buggy address belongs to the physical page: [ 31.306195] page:00000000fd53db4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee83 [ 31.307272] memcg:ffff88800d79dd01 [ 31.307691] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.308381] page_type: 0xffffffff() [ 31.308858] raw: 0100000000000200 ffff8880087a0c80 ffffea0000325180 dead000000000003 [ 31.309795] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d79dd01 [ 31.310720] page dumped because: kasan: bad access detected [ 31.311415] [ 31.311627] Memory state around the buggy address: [ 31.312209] ffff88800ee83480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.313113] ffff88800ee83500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.313996] >ffff88800ee83580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.314868] ^ [ 31.315525] ffff88800ee83600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.316370] ffff88800ee83680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.317220] ================================================================== [ 31.318188] Disabling lock debugging due to kernel taint [ 33.460257] BUG: Bad rss-counter state mm:00000000e137ff22 type:MM_FILEPAGES val:33 [ 33.461171] BUG: Bad rss-counter state mm:00000000e137ff22 type:MM_ANONPAGES val:22 [ 33.932421] BUG: Bad rss-counter state mm:000000002db65517 type:MM_FILEPAGES val:33 [ 33.933483] BUG: Bad rss-counter state mm:000000002db65517 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56654' (ECDSA) to the list of known hosts. 2023/06/20 16:40:05 fuzzer started 2023/06/20 16:40:05 dialing manager at localhost:36067 2023/06/20 16:40:05 checking machine... 2023/06/20 16:40:05 checking revisions... [ 34.626039] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:40:06 testing simple program... [ 34.679971] cgroup: Unknown subsys name 'net' [ 34.734856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:40:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff8880069e3680 RSI=ffffffff818acb11 RDI=ffff88801a079100 RBP=ffff88801a079100 RSP=ffff88801453fca0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88801453fcf8 R14=ffff88801453fcf8 R15=ffff88801453fe9e RIP=ffffffff818936f4 RFL=00000292 [--S-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 00007fce8e705900 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=00007f3a874a5c20 CR3=000000000f8fc000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fce8ecba650 CR3=000000000dce2000 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=2035303a30343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000