syzkaller login: [ 43.134535] BUG: Bad rss-counter state mm:00000000baf624f5 type:MM_FILEPAGES val:33 [ 43.135538] BUG: Bad rss-counter state mm:00000000baf624f5 type:MM_ANONPAGES val:22 [ 43.293100] ================================================================== [ 43.294086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.295046] Read of size 8 at addr ffff88800e2073f8 by task sshd/218 [ 43.295834] [ 43.296081] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.297265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.298276] Call Trace: [ 43.298616] [ 43.298910] dump_stack_lvl+0x91/0xf0 [ 43.299401] print_report+0xcc/0x620 [ 43.299911] ? __virt_addr_valid+0x102/0x340 [ 43.300469] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.301127] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.301759] kasan_report+0xbe/0xf0 [ 43.302289] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.302946] vma_interval_tree_remove+0xc75/0xec0 [ 43.303553] vma_prepare+0xc54/0x11a0 [ 43.304056] __split_vma+0x5af/0x950 [ 43.304545] ? __pfx___split_vma+0x10/0x10 [ 43.305111] ? find_held_lock+0x2c/0x110 [ 43.305656] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.306266] ? lock_is_held_type+0x9f/0x120 [ 43.306826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.307438] ? mtree_range_walk+0x632/0x900 [ 43.308012] ? mas_walk+0x5c7/0x7c0 [ 43.308503] do_vmi_munmap+0x1f1/0x2b0 [ 43.309035] mmap_region+0x1f9/0x2660 [ 43.309525] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.310066] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.310816] ? __pfx_lock_acquire+0x10/0x10 [ 43.311356] ? __pfx_mmap_region+0x10/0x10 [ 43.311916] ? security_mmap_addr+0x7d/0xa0 [ 43.312447] ? get_unmapped_area+0x1f5/0x3f0 [ 43.313045] do_mmap+0x854/0xf00 [ 43.313495] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.314031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.314606] ksys_mmap_pgoff+0x3af/0x500 [ 43.315135] do_syscall_64+0x3f/0x90 [ 43.315628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.316305] RIP: 0033:0x7f0968ff2d82 [ 43.316808] 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 [ 43.319015] RSP: 002b:00007ffd6e67f448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.319956] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0968ff2d82 [ 43.320845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f096842c000 [ 43.321698] RBP: 00007f096842c000 R08: 0000000000000009 R09: 0000000000001000 [ 43.322566] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa2f9b9ec0 [ 43.323431] R13: 00007ffd6e67f460 R14: 00007ffd6e67f490 R15: 00007ffd6e67f7f0 [ 43.324320] [ 43.324632] [ 43.324878] Allocated by task 211: [ 43.325315] kasan_save_stack+0x22/0x50 [ 43.325848] kasan_set_track+0x25/0x30 [ 43.326363] __kasan_slab_alloc+0x59/0x70 [ 43.326911] kmem_cache_alloc+0x16b/0x370 [ 43.327444] vm_area_dup+0x20/0x160 [ 43.327925] __split_vma+0x170/0x950 [ 43.328397] split_vma+0xc6/0x110 [ 43.328875] mprotect_fixup+0x8d2/0xb30 [ 43.329384] do_mprotect_pkey+0x87e/0xd40 [ 43.329950] __x64_sys_mprotect+0x78/0xc0 [ 43.330483] do_syscall_64+0x3f/0x90 [ 43.330978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.331630] [ 43.331858] Freed by task 211: [ 43.332257] kasan_save_stack+0x22/0x50 [ 43.332801] kasan_set_track+0x25/0x30 [ 43.333300] kasan_save_free_info+0x2b/0x50 [ 43.333847] __kasan_slab_free+0x10a/0x190 [ 43.334411] kmem_cache_free+0x10d/0x4d0 [ 43.334950] rcu_core+0x8c8/0x2860 [ 43.335413] __do_softirq+0x1b7/0x7d4 [ 43.335912] [ 43.336139] Last potentially related work creation: [ 43.336776] kasan_save_stack+0x22/0x50 [ 43.337446] __kasan_record_aux_stack+0x8e/0xa0 [ 43.338061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.338739] remove_vma+0x139/0x170 [ 43.339208] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.339804] do_vmi_munmap+0x1f1/0x2b0 [ 43.340326] __vm_munmap+0x138/0x3a0 [ 43.340842] __x64_sys_munmap+0x59/0x80 [ 43.341359] do_syscall_64+0x3f/0x90 [ 43.341857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.342538] [ 43.342777] Second to last potentially related work creation: [ 43.343493] kasan_save_stack+0x22/0x50 [ 43.344035] __kasan_record_aux_stack+0x8e/0xa0 [ 43.344629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.345325] remove_vma+0x139/0x170 [ 43.345820] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.346424] do_vmi_munmap+0x1f1/0x2b0 [ 43.346951] mmap_region+0x1f9/0x2660 [ 43.347440] do_mmap+0x854/0xf00 [ 43.347908] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.348430] ksys_mmap_pgoff+0x7d/0x500 [ 43.348970] do_syscall_64+0x3f/0x90 [ 43.349483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.350191] [ 43.350414] The buggy address belongs to the object at ffff88800e2073a0 [ 43.350414] which belongs to the cache vm_area_struct of size 168 [ 43.351980] The buggy address is located 88 bytes inside of [ 43.351980] freed 168-byte region [ffff88800e2073a0, ffff88800e207448) [ 43.353474] [ 43.353716] The buggy address belongs to the physical page: [ 43.354423] page:00000000cee78055 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe207 [ 43.355574] memcg:ffff88800e1aa301 [ 43.356040] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.356808] page_type: 0xffffffff() [ 43.357280] raw: 0100000000000200 ffff88800879fc80 ffffea0000507f00 dead000000000005 [ 43.358283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1aa301 [ 43.359234] page dumped because: kasan: bad access detected [ 43.359935] [ 43.360170] Memory state around the buggy address: [ 43.360791] ffff88800e207280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.361680] ffff88800e207300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.362604] >ffff88800e207380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.363510] ^ [ 43.364424] ffff88800e207400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.365325] ffff88800e207480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.366237] ================================================================== [ 43.367285] Disabling lock debugging due to kernel taint [ 45.231112] BUG: Bad rss-counter state mm:000000002471ef1f type:MM_FILEPAGES val:33 [ 45.232107] BUG: Bad rss-counter state mm:000000002471ef1f type:MM_ANONPAGES val:22 [ 45.808097] BUG: Bad rss-counter state mm:00000000c010dcef type:MM_FILEPAGES val:33 [ 45.809314] BUG: Bad rss-counter state mm:00000000c010dcef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48024' (ECDSA) to the list of known hosts. 2023/06/19 12:40:33 fuzzer started 2023/06/19 12:40:33 dialing manager at localhost:44161 2023/06/19 12:40:33 checking machine... 2023/06/19 12:40:33 checking revisions... [ 46.483046] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:40:33 testing simple program... [ 46.528000] cgroup: Unknown subsys name 'net' [ 46.564463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:40:28 Registers: info registers vcpu 0 RAX=ffffffff860f363f RBX=0000000000000001 RCX=ffffffff860f363c RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff860f363e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000015868 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800d0bfee8 R15=ffff88806ce09a98 RIP=ffffffff811311ed 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 00007f60bd111900 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=00007f728a56a650 CR3=000000000da0a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7715409724fcc07800000000000ae988 XMM05=308783a3cad0fed50000000000136260 XMM06=751b9502027dc0b90000000000134d88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff01be1ec8 CR3=00000000141d4000 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=2033333a30343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000