syzkaller login: [ 36.227028] BUG: Bad rss-counter state mm:00000000bf4523a9 type:MM_FILEPAGES val:33 [ 36.228484] BUG: Bad rss-counter state mm:00000000bf4523a9 type:MM_ANONPAGES val:22 [ 36.376988] ================================================================== [ 36.378051] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.379359] Read of size 8 at addr ffff8880183995c8 by task sshd/220 [ 36.380285] [ 36.380538] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.381534] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.382660] Call Trace: [ 36.383029] [ 36.383360] dump_stack_lvl+0x91/0xf0 [ 36.383930] print_report+0xcc/0x620 [ 36.384508] ? __virt_addr_valid+0x102/0x340 [ 36.385147] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.385866] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.386612] kasan_report+0xbe/0xf0 [ 36.387183] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.387928] vma_interval_tree_remove+0xc75/0xec0 [ 36.388667] vma_prepare+0xc54/0x11a0 [ 36.389248] __split_vma+0x5af/0x950 [ 36.389825] ? __pfx___split_vma+0x10/0x10 [ 36.390458] ? find_held_lock+0x2c/0x110 [ 36.391078] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.391755] ? lock_is_held_type+0x9f/0x120 [ 36.392417] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.393140] ? mtree_range_walk+0x632/0x900 [ 36.393799] ? mas_walk+0x5c7/0x7c0 [ 36.394367] do_vmi_munmap+0x1f1/0x2b0 [ 36.394960] mmap_region+0x1f9/0x2660 [ 36.395537] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.396158] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.397010] ? __pfx_lock_acquire+0x10/0x10 [ 36.397645] ? __pfx_mmap_region+0x10/0x10 [ 36.398280] ? security_mmap_addr+0x7d/0xa0 [ 36.398915] ? get_unmapped_area+0x1f5/0x3f0 [ 36.399572] do_mmap+0x854/0xf00 [ 36.400120] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.400713] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.401383] ksys_mmap_pgoff+0x3af/0x500 [ 36.401987] do_syscall_64+0x3f/0x90 [ 36.402555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.403328] RIP: 0033:0x7f7293533d82 [ 36.403869] 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 [ 36.406411] RSP: 002b:00007ffdb4398358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.407487] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7293533d82 [ 36.408509] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f729296d000 [ 36.409524] RBP: 00007f729296d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.410532] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a8988dec0 [ 36.411549] R13: 00007ffdb4398370 R14: 00007ffdb43983a0 R15: 00007ffdb4398700 [ 36.412590] [ 36.412945] [ 36.413201] Allocated by task 213: [ 36.413709] kasan_save_stack+0x22/0x50 [ 36.414316] kasan_set_track+0x25/0x30 [ 36.414903] __kasan_slab_alloc+0x59/0x70 [ 36.415532] kmem_cache_alloc+0x16b/0x370 [ 36.416157] vm_area_dup+0x20/0x160 [ 36.416698] __split_vma+0x170/0x950 [ 36.417254] split_vma+0xc6/0x110 [ 36.417772] mprotect_fixup+0x8d2/0xb30 [ 36.418368] do_mprotect_pkey+0x87e/0xd40 [ 36.418988] __x64_sys_mprotect+0x78/0xc0 [ 36.419607] do_syscall_64+0x3f/0x90 [ 36.420185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.421028] [ 36.421285] Freed by task 19: [ 36.421744] kasan_save_stack+0x22/0x50 [ 36.422345] kasan_set_track+0x25/0x30 [ 36.422934] kasan_save_free_info+0x2b/0x50 [ 36.423567] __kasan_slab_free+0x10a/0x190 [ 36.424216] kmem_cache_free+0x10d/0x4d0 [ 36.424820] rcu_core+0x8c8/0x2860 [ 36.425341] __do_softirq+0x1b7/0x7d4 [ 36.425903] [ 36.426161] Last potentially related work creation: [ 36.426847] kasan_save_stack+0x22/0x50 [ 36.427447] __kasan_record_aux_stack+0x8e/0xa0 [ 36.428130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.428887] remove_vma+0x139/0x170 [ 36.429420] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.430084] do_vmi_munmap+0x1f1/0x2b0 [ 36.430657] __vm_munmap+0x138/0x3a0 [ 36.431212] __x64_sys_munmap+0x59/0x80 [ 36.431801] do_syscall_64+0x3f/0x90 [ 36.432385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.433160] [ 36.433410] The buggy address belongs to the object at ffff888018399570 [ 36.433410] which belongs to the cache vm_area_struct of size 168 [ 36.435138] The buggy address is located 88 bytes inside of [ 36.435138] freed 168-byte region [ffff888018399570, ffff888018399618) [ 36.436788] [ 36.437045] The buggy address belongs to the physical page: [ 36.437828] page:000000001c624bb3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18399 [ 36.439122] memcg:ffff88800d93d201 [ 36.439625] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.440397] page_type: 0xffffffff() [ 36.440926] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.442016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d93d201 [ 36.443097] page dumped because: kasan: bad access detected [ 36.443881] [ 36.444157] Memory state around the buggy address: [ 36.444841] ffff888018399480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.445859] ffff888018399500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.446875] >ffff888018399580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.447885] ^ [ 36.448675] ffff888018399600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 36.449687] ffff888018399680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.450692] ================================================================== [ 36.452035] Disabling lock debugging due to kernel taint [ 38.427918] BUG: Bad rss-counter state mm:000000008414ce2f type:MM_FILEPAGES val:33 [ 38.429093] BUG: Bad rss-counter state mm:000000008414ce2f type:MM_ANONPAGES val:22 [ 38.822260] BUG: Bad rss-counter state mm:00000000abe9cbfa type:MM_FILEPAGES val:33 [ 38.823417] BUG: Bad rss-counter state mm:00000000abe9cbfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2305' (ECDSA) to the list of known hosts. 2023/06/19 12:49:33 fuzzer started 2023/06/19 12:49:34 dialing manager at localhost:44161 2023/06/19 12:49:34 checking machine... 2023/06/19 12:49:34 checking revisions... [ 39.546556] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:49:34 testing simple program... [ 39.592250] cgroup: Unknown subsys name 'net' [ 39.628253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:49:28 Registers: info registers vcpu 0 RAX=ffffffff8617a282 RBX=ffffffff85e292f8 RCX=ffffffff81afab9c RDX=0000000000000000 RSI=ffffffff8617a282 RDI=ffffffff85e292f8 RBP=ffffffff85e292fc RSP=ffff888016e4f520 R8 =ffffffff8617a282 R9 =ffff888016e4f608 R10=0000000000038001 R11=000000000002bfc9 R12=ffffffff85e292f8 R13=ffffffff85e292f8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb7 RFL=00000282 [--S----] 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 00007fc9a7fff700 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=00007f7b58026c70 CR3=000000000d798000 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=2033333a39343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a39343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000e RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000e RDI=ffff88800f1e7750 RBP=dffffc0000000000 RSP=ffff88800f1e7660 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000e R13=0000000000000000 R14=ffff88800f1e76e0 R15=0000000000000014 RIP=ffffffff813ad617 RFL=00000282 [--S----] 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 00007fa5c6e2a900 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=00007ffd52546000 CR3=000000001a372000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000