syzkaller login: [ 38.942788] BUG: Bad rss-counter state mm:000000001c604a2c type:MM_FILEPAGES val:33 [ 38.944028] BUG: Bad rss-counter state mm:000000001c604a2c type:MM_ANONPAGES val:22 [ 38.980902] ================================================================== [ 38.982039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.983151] Read of size 8 at addr ffff88800dae7798 by task sshd/219 [ 38.984024] [ 38.984254] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.985171] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.986208] Call Trace: [ 38.986551] [ 38.986854] dump_stack_lvl+0x91/0xf0 [ 38.987396] print_report+0xcc/0x620 [ 38.987911] ? __virt_addr_valid+0x102/0x340 [ 38.988511] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.989174] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.989843] kasan_report+0xbe/0xf0 [ 38.990355] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.991031] vma_interval_tree_remove+0xc75/0xec0 [ 38.991727] vma_prepare+0xc54/0x11a0 [ 38.992252] __split_vma+0x5af/0x950 [ 38.992780] ? __pfx___split_vma+0x10/0x10 [ 38.993362] ? find_held_lock+0x2c/0x110 [ 38.993934] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.994554] ? lock_is_held_type+0x9f/0x120 [ 38.995151] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.995810] ? mtree_range_walk+0x632/0x900 [ 38.996425] ? mas_walk+0x5c7/0x7c0 [ 38.996950] do_vmi_munmap+0x1f1/0x2b0 [ 38.997489] mmap_region+0x1f9/0x2660 [ 38.998019] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.998582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.999379] ? __pfx_lock_acquire+0x10/0x10 [ 38.999968] ? __pfx_mmap_region+0x10/0x10 [ 39.000557] ? security_mmap_addr+0x7d/0xa0 [ 39.001137] ? get_unmapped_area+0x1f5/0x3f0 [ 39.001733] do_mmap+0x854/0xf00 [ 39.002219] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.002762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.003399] ksys_mmap_pgoff+0x3af/0x500 [ 39.003965] do_syscall_64+0x3f/0x90 [ 39.004490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.005199] RIP: 0033:0x7f5656db3d82 [ 39.005706] 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 [ 39.008055] RSP: 002b:00007fff0dbd5608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.009256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5656db3d82 [ 39.010205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56561ed000 [ 39.011232] RBP: 00007f56561ed000 R08: 0000000000000009 R09: 0000000000001000 [ 39.012100] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc11b93ec0 [ 39.012950] R13: 00007fff0dbd5620 R14: 00007fff0dbd5650 R15: 00007fff0dbd59b0 [ 39.013831] [ 39.014133] [ 39.014348] Allocated by task 212: [ 39.014782] kasan_save_stack+0x22/0x50 [ 39.015337] kasan_set_track+0x25/0x30 [ 39.015846] __kasan_slab_alloc+0x59/0x70 [ 39.016363] kmem_cache_alloc+0x16b/0x370 [ 39.016872] vm_area_dup+0x20/0x160 [ 39.017329] __split_vma+0x170/0x950 [ 39.017789] split_vma+0xc6/0x110 [ 39.018223] mprotect_fixup+0x8d2/0xb30 [ 39.018725] do_mprotect_pkey+0x87e/0xd40 [ 39.019261] __x64_sys_mprotect+0x78/0xc0 [ 39.019781] do_syscall_64+0x3f/0x90 [ 39.020259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.020911] [ 39.021129] Freed by task 212: [ 39.021524] kasan_save_stack+0x22/0x50 [ 39.022029] kasan_set_track+0x25/0x30 [ 39.022521] kasan_save_free_info+0x2b/0x50 [ 39.023056] __kasan_slab_free+0x10a/0x190 [ 39.023597] kmem_cache_free+0x10d/0x4d0 [ 39.024109] rcu_core+0x8c8/0x2860 [ 39.024555] __do_softirq+0x1b7/0x7d4 [ 39.025032] [ 39.025250] Last potentially related work creation: [ 39.025833] kasan_save_stack+0x22/0x50 [ 39.026337] __kasan_record_aux_stack+0x8e/0xa0 [ 39.026913] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.027565] remove_vma+0x139/0x170 [ 39.028019] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.028577] do_vmi_munmap+0x1f1/0x2b0 [ 39.029067] __vm_munmap+0x138/0x3a0 [ 39.029533] __x64_sys_munmap+0x59/0x80 [ 39.030029] do_syscall_64+0x3f/0x90 [ 39.030503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.031155] [ 39.031373] Second to last potentially related work creation: [ 39.032065] kasan_save_stack+0x22/0x50 [ 39.032566] __kasan_record_aux_stack+0x8e/0xa0 [ 39.033153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.033796] remove_vma+0x139/0x170 [ 39.034246] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.034801] do_vmi_munmap+0x1f1/0x2b0 [ 39.035302] mmap_region+0x1f9/0x2660 [ 39.035777] do_mmap+0x854/0xf00 [ 39.036212] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.036703] ksys_mmap_pgoff+0x3af/0x500 [ 39.037204] do_syscall_64+0x3f/0x90 [ 39.037676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.038317] [ 39.038534] The buggy address belongs to the object at ffff88800dae7740 [ 39.038534] which belongs to the cache vm_area_struct of size 168 [ 39.040008] The buggy address is located 88 bytes inside of [ 39.040008] freed 168-byte region [ffff88800dae7740, ffff88800dae77e8) [ 39.041414] [ 39.041629] The buggy address belongs to the physical page: [ 39.042290] page:000000003f30df3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdae7 [ 39.043388] memcg:ffff88800cfa1a01 [ 39.043814] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.044517] page_type: 0xffffffff() [ 39.044967] raw: 0100000000000200 ffff8880087a0c80 ffffea000038fd00 dead000000000007 [ 39.045882] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfa1a01 [ 39.046785] page dumped because: kasan: bad access detected [ 39.047471] [ 39.047686] Memory state around the buggy address: [ 39.048265] ffff88800dae7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.049122] ffff88800dae7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.049971] >ffff88800dae7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.050816] ^ [ 39.051316] ffff88800dae7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.052241] ffff88800dae7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.053083] ================================================================== [ 39.054026] Disabling lock debugging due to kernel taint [ 41.242953] BUG: Bad rss-counter state mm:00000000a00b9eba type:MM_FILEPAGES val:33 [ 41.243953] BUG: Bad rss-counter state mm:00000000a00b9eba type:MM_ANONPAGES val:22 [ 41.789961] BUG: Bad rss-counter state mm:00000000fe528cb1 type:MM_FILEPAGES val:33 [ 41.791102] BUG: Bad rss-counter state mm:00000000fe528cb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38764' (ECDSA) to the list of known hosts. 2023/06/21 02:33:55 fuzzer started 2023/06/21 02:33:56 dialing manager at localhost:36067 2023/06/21 02:33:56 checking machine... 2023/06/21 02:33:56 checking revisions... [ 42.435789] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:33:56 testing simple program... [ 42.475410] cgroup: Unknown subsys name 'net' [ 42.528447] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:33:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001d4d69c RSI=ffffffff84901940 RDI=ffff88800ea6b4e0 RBP=ffff88800ea6b4c8 RSP=ffff88801432fa48 R8 =0000000000000003 R9 =0000000000000000 R10=ffff88800ea6b4ab R11=00000000000b6a61 R12=ffffffff87f33860 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff88801432fdf0 RIP=ffffffff812db3f8 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 00007f7bc04ad900 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=00007f7bbf9cd000 CR3=000000000d6b2000 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=3b5cec11d2c932df00000000000ae988 XMM05=67e0163f8eb24cd30000000000134d68 XMM06=130a01ca651daeb40000000000133798 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888018047708 RCX=0000000000000001 RDX=1ffff11003008ee1 RSI=ffff888018047ad8 RDI=ffff888018047708 RBP=ffff8880180477a0 RSP=ffff8880180476f0 R8 =0000000000000001 R9 =ffff888018047748 R10=0000000000038001 R11=0000000000020c57 R12=ffff8880180477d0 R13=0000000000000000 R14=ffff8880174cb680 R15=0000000000082cc0 RIP=ffffffff8113035a RFL=00000216 [----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 00007f9e256c1900 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=00007fff7d651000 CR3=000000000e7c0000 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=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