syzkaller login: [ 38.882391] BUG: Bad rss-counter state mm:0000000045bbc788 type:MM_FILEPAGES val:33 [ 38.883868] BUG: Bad rss-counter state mm:0000000045bbc788 type:MM_ANONPAGES val:22 [ 39.027512] ================================================================== [ 39.028813] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.030290] Read of size 8 at addr ffff88800dce7310 by task sshd/225 [ 39.031303] [ 39.031569] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.032621] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.033838] Call Trace: [ 39.034224] [ 39.034567] dump_stack_lvl+0x91/0xf0 [ 39.035160] print_report+0xcc/0x620 [ 39.035745] ? __virt_addr_valid+0x102/0x340 [ 39.036415] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.037197] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.037948] kasan_report+0xbe/0xf0 [ 39.038532] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.039283] vma_interval_tree_remove+0xc75/0xec0 [ 39.040024] vma_prepare+0xc54/0x11a0 [ 39.040605] __split_vma+0x5af/0x950 [ 39.041212] ? __pfx___split_vma+0x10/0x10 [ 39.041858] ? find_held_lock+0x2c/0x110 [ 39.042495] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.043197] ? lock_is_held_type+0x9f/0x120 [ 39.043854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.044588] ? mtree_range_walk+0x632/0x900 [ 39.045269] ? mas_walk+0x5c7/0x7c0 [ 39.045851] do_vmi_munmap+0x1f1/0x2b0 [ 39.046449] mmap_region+0x1f9/0x2660 [ 39.047032] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.047657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.048528] ? __pfx_lock_acquire+0x10/0x10 [ 39.049197] ? __pfx_mmap_region+0x10/0x10 [ 39.049843] ? security_mmap_addr+0x7d/0xa0 [ 39.050500] ? get_unmapped_area+0x1f5/0x3f0 [ 39.051175] do_mmap+0x854/0xf00 [ 39.051707] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.052303] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.052994] ksys_mmap_pgoff+0x3af/0x500 [ 39.053609] do_syscall_64+0x3f/0x90 [ 39.054185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.054974] RIP: 0033:0x7f8cf901ad82 [ 39.055527] 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 [ 39.058177] RSP: 002b:00007ffe1b29e1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.059295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cf901ad82 [ 39.060334] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cf8454000 [ 39.061388] RBP: 00007f8cf8454000 R08: 0000000000000009 R09: 0000000000001000 [ 39.062443] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f687c5ab20 [ 39.063495] R13: 00007ffe1b29e1d0 R14: 00007ffe1b29e200 R15: 00007ffe1b29e560 [ 39.064547] [ 39.064905] [ 39.065114] Allocated by task 218: [ 39.065521] kasan_save_stack+0x22/0x50 [ 39.066002] kasan_set_track+0x25/0x30 [ 39.066476] __kasan_slab_alloc+0x59/0x70 [ 39.066979] kmem_cache_alloc+0x16b/0x370 [ 39.067475] vm_area_dup+0x20/0x160 [ 39.067906] __split_vma+0x170/0x950 [ 39.068349] split_vma+0xc6/0x110 [ 39.068767] mprotect_fixup+0x8d2/0xb30 [ 39.069271] do_mprotect_pkey+0x87e/0xd40 [ 39.069764] __x64_sys_mprotect+0x78/0xc0 [ 39.070267] do_syscall_64+0x3f/0x90 [ 39.070718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.071328] [ 39.071537] Freed by task 19: [ 39.071903] kasan_save_stack+0x22/0x50 [ 39.072378] kasan_set_track+0x25/0x30 [ 39.072847] kasan_save_free_info+0x2b/0x50 [ 39.073358] __kasan_slab_free+0x10a/0x190 [ 39.073870] kmem_cache_free+0x10d/0x4d0 [ 39.074373] rcu_core+0x8c8/0x2860 [ 39.074816] __do_softirq+0x1b7/0x7d4 [ 39.075300] [ 39.075519] Last potentially related work creation: [ 39.076119] kasan_save_stack+0x22/0x50 [ 39.076616] __kasan_record_aux_stack+0x8e/0xa0 [ 39.077195] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.077821] remove_vma+0x139/0x170 [ 39.078262] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.078819] do_vmi_munmap+0x1f1/0x2b0 [ 39.079308] __vm_munmap+0x138/0x3a0 [ 39.079778] __x64_sys_munmap+0x59/0x80 [ 39.080268] do_syscall_64+0x3f/0x90 [ 39.080735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.081389] [ 39.081603] The buggy address belongs to the object at ffff88800dce72b8 [ 39.081603] which belongs to the cache vm_area_struct of size 168 [ 39.083083] The buggy address is located 88 bytes inside of [ 39.083083] freed 168-byte region [ffff88800dce72b8, ffff88800dce7360) [ 39.084504] [ 39.084726] The buggy address belongs to the physical page: [ 39.085404] page:00000000f316ac48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdce7 [ 39.086486] memcg:ffff888012fa8201 [ 39.086922] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.087570] page_type: 0xffffffff() [ 39.088025] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.088981] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888012fa8201 [ 39.089893] page dumped because: kasan: bad access detected [ 39.090562] [ 39.090780] Memory state around the buggy address: [ 39.091361] ffff88800dce7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.092227] ffff88800dce7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.093107] >ffff88800dce7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.093967] ^ [ 39.094438] ffff88800dce7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.095294] ffff88800dce7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.096148] ================================================================== [ 39.097197] Disabling lock debugging due to kernel taint [ 41.093735] BUG: Bad rss-counter state mm:000000007dd0e34a type:MM_FILEPAGES val:33 [ 41.094923] BUG: Bad rss-counter state mm:000000007dd0e34a type:MM_ANONPAGES val:22 [ 41.632244] BUG: Bad rss-counter state mm:000000006e6132e3 type:MM_FILEPAGES val:33 [ 41.633443] BUG: Bad rss-counter state mm:000000006e6132e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27162' (ECDSA) to the list of known hosts. 2023/06/20 12:22:33 fuzzer started 2023/06/20 12:22:33 dialing manager at localhost:36067 2023/06/20 12:22:33 checking machine... 2023/06/20 12:22:33 checking revisions... [ 42.292198] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:22:34 testing simple program... [ 42.343937] cgroup: Unknown subsys name 'net' [ 42.393744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:22:33 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff8880143bfe90 RSI=ffff8880143bfe58 RDI=ffff8880143bf9e8 RBP=ffff8880143bfa70 RSP=ffff8880143bf9b8 R8 =0000000000000001 R9 =ffff8880143bfa18 R10=0000000000038001 R11=00000000000223eb R12=ffff8880143bfaa0 R13=ffff8880143bfa20 R14=ffff8880143bfe58 R15=ffff8880143bf9d8 RIP=ffffffff81130933 RFL=00000296 [--S-AP-] 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 00007fa4bf16d900 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=00007fa4be55cc80 CR3=00000000096da000 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=88e79bd942e771d500000000000ae988 XMM05=69dc7c8bf45500720000000000133720 XMM06=162149d514a357b80000000000131b48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003048efd RSI=ffffffff83861243 RDI=ffff8880182477e8 RBP=ffff888018247880 RSP=ffff8880182477c0 R8 =0000000000000001 R9 =ffff888018247828 R10=0000000000038001 R11=000000000008b06b R12=ffff8880182478b0 R13=0000000000000000 R14=ffff888009e41b40 R15=ffff8880182477e8 RIP=ffffffff811305f0 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 00007efdb5b86900 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=00007ffcd7935000 CR3=00000000165b4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000