syzkaller login: [ 31.795103] BUG: Bad rss-counter state mm:000000001df1eed4 type:MM_FILEPAGES val:33 [ 31.797133] BUG: Bad rss-counter state mm:000000001df1eed4 type:MM_ANONPAGES val:22 [ 31.962460] ================================================================== [ 31.963454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.964497] Read of size 8 at addr ffff888009498058 by task sshd/221 [ 31.965473] [ 31.965711] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.966638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.967683] Call Trace: [ 31.968027] [ 31.968357] dump_stack_lvl+0x91/0xf0 [ 31.968889] print_report+0xcc/0x620 [ 31.969408] ? __virt_addr_valid+0x102/0x340 [ 31.970005] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.970673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.971335] kasan_report+0xbe/0xf0 [ 31.971846] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.972525] vma_interval_tree_remove+0xc75/0xec0 [ 31.973173] vma_prepare+0xc54/0x11a0 [ 31.973689] __split_vma+0x5af/0x950 [ 31.974205] ? __pfx___split_vma+0x10/0x10 [ 31.974775] ? find_held_lock+0x2c/0x110 [ 31.975339] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.975948] ? lock_is_held_type+0x9f/0x120 [ 31.976530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.977183] ? mtree_range_walk+0x632/0x900 [ 31.977781] ? mas_walk+0x5c7/0x7c0 [ 31.978291] do_vmi_munmap+0x1f1/0x2b0 [ 31.978822] mmap_region+0x1f9/0x2660 [ 31.979341] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.979890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.980635] ? __pfx_lock_acquire+0x10/0x10 [ 31.981213] ? __pfx_mmap_region+0x10/0x10 [ 31.981784] ? security_mmap_addr+0x7d/0xa0 [ 31.982364] ? get_unmapped_area+0x1f5/0x3f0 [ 31.982952] do_mmap+0x854/0xf00 [ 31.983421] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.983948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.984518] ksys_mmap_pgoff+0x3af/0x500 [ 31.985051] do_syscall_64+0x3f/0x90 [ 31.985564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.986278] RIP: 0033:0x7fc7e08f1d82 [ 31.986776] 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 [ 31.989043] RSP: 002b:00007ffcf205e568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.990021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7e08f1d82 [ 31.990930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7dfd2b000 [ 31.991789] RBP: 00007fc7dfd2b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.992715] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581564e6ec0 [ 31.993632] R13: 00007ffcf205e580 R14: 00007ffcf205e5b0 R15: 00007ffcf205e910 [ 31.994564] [ 31.994874] [ 31.995091] Allocated by task 214: [ 31.995521] kasan_save_stack+0x22/0x50 [ 31.996057] kasan_set_track+0x25/0x30 [ 31.996603] __kasan_slab_alloc+0x59/0x70 [ 31.997170] kmem_cache_alloc+0x16b/0x370 [ 31.997725] vm_area_dup+0x20/0x160 [ 31.998219] __split_vma+0x170/0x950 [ 31.998734] split_vma+0xc6/0x110 [ 31.999174] mprotect_fixup+0x8d2/0xb30 [ 31.999679] do_mprotect_pkey+0x87e/0xd40 [ 32.000236] __x64_sys_mprotect+0x78/0xc0 [ 32.000805] do_syscall_64+0x3f/0x90 [ 32.001316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.002018] [ 32.002254] Freed by task 214: [ 32.002675] kasan_save_stack+0x22/0x50 [ 32.003220] kasan_set_track+0x25/0x30 [ 32.003758] kasan_save_free_info+0x2b/0x50 [ 32.004363] __kasan_slab_free+0x10a/0x190 [ 32.004946] kmem_cache_free+0x10d/0x4d0 [ 32.005572] rcu_core+0x8c8/0x2860 [ 32.006062] __do_softirq+0x1b7/0x7d4 [ 32.006583] [ 32.006819] Last potentially related work creation: [ 32.007457] kasan_save_stack+0x22/0x50 [ 32.007994] __kasan_record_aux_stack+0x8e/0xa0 [ 32.008574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.009267] remove_vma+0x139/0x170 [ 32.009757] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.010364] do_vmi_munmap+0x1f1/0x2b0 [ 32.010887] __vm_munmap+0x138/0x3a0 [ 32.011356] __x64_sys_munmap+0x59/0x80 [ 32.011870] do_syscall_64+0x3f/0x90 [ 32.012399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.013096] [ 32.013328] The buggy address belongs to the object at ffff888009498000 [ 32.013328] which belongs to the cache vm_area_struct of size 168 [ 32.014922] The buggy address is located 88 bytes inside of [ 32.014922] freed 168-byte region [ffff888009498000, ffff8880094980a8) [ 32.016443] [ 32.016688] The buggy address belongs to the physical page: [ 32.017412] page:00000000a7c7ddd7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9498 [ 32.018603] memcg:ffff88801979cf01 [ 32.019071] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.019780] page_type: 0xffffffff() [ 32.020292] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.021297] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801979cf01 [ 32.022298] page dumped because: kasan: bad access detected [ 32.023016] [ 32.023240] Memory state around the buggy address: [ 32.023846] ffff888009497f00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.024789] ffff888009497f80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.025725] >ffff888009498000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.026654] ^ [ 32.027404] ffff888009498080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.028337] ffff888009498100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.029298] ================================================================== [ 32.030302] Disabling lock debugging due to kernel taint [ 34.037923] BUG: Bad rss-counter state mm:00000000267d8946 type:MM_FILEPAGES val:33 [ 34.039119] BUG: Bad rss-counter state mm:00000000267d8946 type:MM_ANONPAGES val:22 [ 34.386963] BUG: Bad rss-counter state mm:0000000091a3cfd9 type:MM_FILEPAGES val:33 [ 34.387873] BUG: Bad rss-counter state mm:0000000091a3cfd9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29271' (ECDSA) to the list of known hosts. 2023/06/20 01:35:21 fuzzer started 2023/06/20 01:35:21 dialing manager at localhost:44161 2023/06/20 01:35:21 checking machine... 2023/06/20 01:35:21 checking revisions... [ 35.067426] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:35:21 testing simple program... [ 35.116387] cgroup: Unknown subsys name 'net' [ 35.169272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:35:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f64a7cf9a10 CR3=0000000019460000 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=2030323a35333a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a35333a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000255 RCX=ffffffff8171ae23 RDX=ffff88800de5d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800de5d1c0 RSP=ffff88800c967e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007f1a09f09020 R14=0000000000000000 R15=0000000000000040 RIP=ffffffff814c01fc 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1a09f2a900 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=00007f1a09f09020 CR3=000000000eaa2000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000