syzkaller login: [ 127.747302] BUG: Bad rss-counter state mm:00000000672f9848 type:MM_FILEPAGES val:33 [ 127.748401] BUG: Bad rss-counter state mm:00000000672f9848 type:MM_ANONPAGES val:22 [ 127.918610] ================================================================== [ 127.919583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 127.920570] Read of size 8 at addr ffff88800dd03140 by task sshd/218 [ 127.921583] [ 127.921816] CPU: 1 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 127.922905] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 127.923939] Call Trace: [ 127.924285] [ 127.924588] dump_stack_lvl+0x91/0xf0 [ 127.925112] print_report+0xcc/0x620 [ 127.925645] ? __virt_addr_valid+0x102/0x340 [ 127.926237] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.926905] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.927564] kasan_report+0xbe/0xf0 [ 127.928067] ? vma_interval_tree_remove+0xc75/0xec0 [ 127.928744] vma_interval_tree_remove+0xc75/0xec0 [ 127.929427] vma_prepare+0xc54/0x11a0 [ 127.929952] __split_vma+0x5af/0x950 [ 127.930468] ? __pfx___split_vma+0x10/0x10 [ 127.931053] ? find_held_lock+0x2c/0x110 [ 127.931623] do_vmi_align_munmap+0x2ba/0x11f0 [ 127.932241] ? lock_is_held_type+0x9f/0x120 [ 127.932832] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 127.933502] ? mtree_range_walk+0x632/0x900 [ 127.934106] ? mas_walk+0x5c7/0x7c0 [ 127.934630] do_vmi_munmap+0x1f1/0x2b0 [ 127.935169] mmap_region+0x1f9/0x2660 [ 127.935703] ? vm_mmap_pgoff+0x15c/0x3a0 [ 127.936272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 127.937056] ? __pfx_lock_acquire+0x10/0x10 [ 127.937665] ? __pfx_mmap_region+0x10/0x10 [ 127.938245] ? security_mmap_addr+0x7d/0xa0 [ 127.938828] ? get_unmapped_area+0x1f5/0x3f0 [ 127.939431] do_mmap+0x854/0xf00 [ 127.939909] vm_mmap_pgoff+0x1a6/0x3a0 [ 127.940447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 127.941066] ksys_mmap_pgoff+0x3af/0x500 [ 127.941631] do_syscall_64+0x3f/0x90 [ 127.942155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.942864] RIP: 0033:0x7f790ed95d82 [ 127.943364] 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 [ 127.945710] RSP: 002b:00007fff289795a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 127.946706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f790ed95d82 [ 127.947642] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f790e1cf000 [ 127.948572] RBP: 00007f790e1cf000 R08: 0000000000000009 R09: 0000000000001000 [ 127.949526] R10: 0000000000000812 R11: 0000000000000206 R12: 000055814c5bab20 [ 127.950471] R13: 00007fff289795c0 R14: 00007fff289795f0 R15: 00007fff28979950 [ 127.951419] [ 127.951741] [ 127.951979] Allocated by task 211: [ 127.952452] kasan_save_stack+0x22/0x50 [ 127.953007] kasan_set_track+0x25/0x30 [ 127.953564] __kasan_slab_alloc+0x59/0x70 [ 127.954145] kmem_cache_alloc+0x16b/0x370 [ 127.954715] vm_area_dup+0x20/0x160 [ 127.955218] __split_vma+0x170/0x950 [ 127.955728] split_vma+0xc6/0x110 [ 127.956207] mprotect_fixup+0x8d2/0xb30 [ 127.956764] do_mprotect_pkey+0x87e/0xd40 [ 127.957342] __x64_sys_mprotect+0x78/0xc0 [ 127.957918] do_syscall_64+0x3f/0x90 [ 127.958437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.959140] [ 127.959382] Freed by task 211: [ 127.959817] kasan_save_stack+0x22/0x50 [ 127.960372] kasan_set_track+0x25/0x30 [ 127.960911] kasan_save_free_info+0x2b/0x50 [ 127.961519] __kasan_slab_free+0x10a/0x190 [ 127.962105] kmem_cache_free+0x10d/0x4d0 [ 127.962766] rcu_core+0x8c8/0x2860 [ 127.963253] __do_softirq+0x1b7/0x7d4 [ 127.963776] [ 127.964013] Last potentially related work creation: [ 127.964655] kasan_save_stack+0x22/0x50 [ 127.965218] __kasan_record_aux_stack+0x8e/0xa0 [ 127.965853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 127.966561] remove_vma+0x139/0x170 [ 127.967059] do_vmi_align_munmap+0xd4a/0x11f0 [ 127.967670] do_vmi_munmap+0x1f1/0x2b0 [ 127.968202] __vm_munmap+0x138/0x3a0 [ 127.968721] __x64_sys_munmap+0x59/0x80 [ 127.969280] do_syscall_64+0x3f/0x90 [ 127.969799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.970505] [ 127.970741] Second to last potentially related work creation: [ 127.971504] kasan_save_stack+0x22/0x50 [ 127.972061] __kasan_record_aux_stack+0x8e/0xa0 [ 127.972688] __call_rcu_common.constprop.0+0x6a/0xb90 [ 127.973412] remove_vma+0x139/0x170 [ 127.973908] do_vmi_align_munmap+0xd4a/0x11f0 [ 127.974518] do_vmi_munmap+0x1f1/0x2b0 [ 127.975053] mmap_region+0x1f9/0x2660 [ 127.975576] do_mmap+0x854/0xf00 [ 127.976049] vm_mmap_pgoff+0x1a6/0x3a0 [ 127.976585] ksys_mmap_pgoff+0x3af/0x500 [ 127.977140] do_syscall_64+0x3f/0x90 [ 127.977675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 127.978376] [ 127.978608] The buggy address belongs to the object at ffff88800dd030e8 [ 127.978608] which belongs to the cache vm_area_struct of size 168 [ 127.980214] The buggy address is located 88 bytes inside of [ 127.980214] freed 168-byte region [ffff88800dd030e8, ffff88800dd03190) [ 127.981781] [ 127.982020] The buggy address belongs to the physical page: [ 127.982743] page:0000000046f32e7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd03 [ 127.983932] memcg:ffff88800d9dc901 [ 127.984400] flags: 0x100000000000200(slab|node=0|zone=1) [ 127.985109] page_type: 0xffffffff() [ 127.985613] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 127.986623] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9dc901 [ 127.987626] page dumped because: kasan: bad access detected [ 127.988360] [ 127.988597] Memory state around the buggy address: [ 127.989257] ffff88800dd03000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.990205] ffff88800dd03080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 127.991163] >ffff88800dd03100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.992108] ^ [ 127.992812] ffff88800dd03180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 127.993761] ffff88800dd03200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 127.994695] ================================================================== [ 127.995763] Disabling lock debugging due to kernel taint [ 130.420978] BUG: Bad rss-counter state mm:00000000625b8844 type:MM_FILEPAGES val:33 [ 130.422668] BUG: Bad rss-counter state mm:00000000625b8844 type:MM_ANONPAGES val:22 [ 130.803644] BUG: Bad rss-counter state mm:0000000005773ef0 type:MM_FILEPAGES val:33 [ 130.804672] BUG: Bad rss-counter state mm:0000000005773ef0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10222' (ECDSA) to the list of known hosts. 2023/06/20 04:28:44 fuzzer started 2023/06/20 04:28:44 dialing manager at localhost:44161 2023/06/20 04:28:44 checking machine... 2023/06/20 04:28:44 checking revisions... [ 131.479828] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:28:44 testing simple program... [ 131.566716] cgroup: Unknown subsys name 'net' [ 131.691281] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:27:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888015d67db0 RDI=ffff888015d67e00 RBP=ffff888015d67e00 RSP=ffff888015d67cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888015d67db0 R13=ffff888015d67dc8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8162eff4 RFL=00000293 [--S-A-C] 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 00007f42559af900 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=00007f4255f64650 CR3=000000001bfba000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 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=0000558ab4122218 CR3=0000000017db6000 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=2033343a38323a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a38323a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000