syzkaller login: [ 30.849190] BUG: Bad rss-counter state mm:00000000590dcdcb type:MM_FILEPAGES val:33 [ 30.850436] BUG: Bad rss-counter state mm:00000000590dcdcb type:MM_ANONPAGES val:22 [ 31.005543] ================================================================== [ 31.006448] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.007325] Read of size 8 at addr ffff88801583d798 by task sshd/221 [ 31.008050] [ 31.008256] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.009170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.010077] Call Trace: [ 31.010394] [ 31.010664] dump_stack_lvl+0x91/0xf0 [ 31.011136] print_report+0xcc/0x620 [ 31.011591] ? __virt_addr_valid+0x102/0x340 [ 31.012114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.012688] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.013264] kasan_report+0xbe/0xf0 [ 31.013715] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.014317] vma_interval_tree_remove+0xc75/0xec0 [ 31.015020] vma_prepare+0xc54/0x11a0 [ 31.015584] __split_vma+0x5af/0x950 [ 31.016137] ? __pfx___split_vma+0x10/0x10 [ 31.016758] ? find_held_lock+0x2c/0x110 [ 31.017364] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.018027] ? lock_is_held_type+0x9f/0x120 [ 31.018670] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.019380] ? mtree_range_walk+0x632/0x900 [ 31.020029] ? mas_walk+0x5c7/0x7c0 [ 31.020584] do_vmi_munmap+0x1f1/0x2b0 [ 31.021164] mmap_region+0x1f9/0x2660 [ 31.021732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.022350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.023184] ? __pfx_lock_acquire+0x10/0x10 [ 31.023808] ? __pfx_mmap_region+0x10/0x10 [ 31.024428] ? security_mmap_addr+0x7d/0xa0 [ 31.025051] ? get_unmapped_area+0x1f5/0x3f0 [ 31.025694] do_mmap+0x854/0xf00 [ 31.026215] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.026792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.027445] ksys_mmap_pgoff+0x3af/0x500 [ 31.028041] do_syscall_64+0x3f/0x90 [ 31.028597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029355] RIP: 0033:0x7f2c69f92d82 [ 31.029887] 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 [ 31.032390] RSP: 002b:00007ffe5e9b89f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.033454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c69f92d82 [ 31.034456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c693cc000 [ 31.035445] RBP: 00007f2c693cc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.036441] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560639e54ec0 [ 31.037439] R13: 00007ffe5e9b8a10 R14: 00007ffe5e9b8a40 R15: 00007ffe5e9b8da0 [ 31.038459] [ 31.038802] [ 31.039053] Allocated by task 214: [ 31.039559] kasan_save_stack+0x22/0x50 [ 31.040151] kasan_set_track+0x25/0x30 [ 31.040733] __kasan_slab_alloc+0x59/0x70 [ 31.041347] kmem_cache_alloc+0x16b/0x370 [ 31.041954] vm_area_dup+0x20/0x160 [ 31.042497] __split_vma+0x170/0x950 [ 31.043057] split_vma+0xc6/0x110 [ 31.043569] mprotect_fixup+0x8d2/0xb30 [ 31.044154] do_mprotect_pkey+0x87e/0xd40 [ 31.044758] __x64_sys_mprotect+0x78/0xc0 [ 31.045366] do_syscall_64+0x3f/0x90 [ 31.045920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.046683] [ 31.046935] Freed by task 214: [ 31.047394] kasan_save_stack+0x22/0x50 [ 31.047982] kasan_set_track+0x25/0x30 [ 31.048559] kasan_save_free_info+0x2b/0x50 [ 31.049186] __kasan_slab_free+0x10a/0x190 [ 31.049813] kmem_cache_free+0x10d/0x4d0 [ 31.050427] rcu_core+0x8c8/0x2860 [ 31.050945] __do_softirq+0x1b7/0x7d4 [ 31.051506] [ 31.051756] Last potentially related work creation: [ 31.052445] kasan_save_stack+0x22/0x50 [ 31.053034] __kasan_record_aux_stack+0x8e/0xa0 [ 31.053703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.054471] remove_vma+0x139/0x170 [ 31.055001] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.055655] do_vmi_munmap+0x1f1/0x2b0 [ 31.056237] __vm_munmap+0x138/0x3a0 [ 31.056784] __x64_sys_munmap+0x59/0x80 [ 31.057366] do_syscall_64+0x3f/0x90 [ 31.057924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058679] [ 31.058931] Second to last potentially related work creation: [ 31.059732] kasan_save_stack+0x22/0x50 [ 31.060318] __kasan_record_aux_stack+0x8e/0xa0 [ 31.060994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.061747] remove_vma+0x139/0x170 [ 31.062293] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.062944] do_vmi_munmap+0x1f1/0x2b0 [ 31.063516] mmap_region+0x1f9/0x2660 [ 31.064077] do_mmap+0x854/0xf00 [ 31.064583] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.065151] ksys_mmap_pgoff+0x3af/0x500 [ 31.065737] do_syscall_64+0x3f/0x90 [ 31.066298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067049] [ 31.067298] The buggy address belongs to the object at ffff88801583d740 [ 31.067298] which belongs to the cache vm_area_struct of size 168 [ 31.069017] The buggy address is located 88 bytes inside of [ 31.069017] freed 168-byte region [ffff88801583d740, ffff88801583d7e8) [ 31.070694] [ 31.070946] The buggy address belongs to the physical page: [ 31.071724] page:000000007fc787d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1583d [ 31.073002] memcg:ffff888017e7b101 [ 31.073500] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.074268] page_type: 0xffffffff() [ 31.074794] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.075869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e7b101 [ 31.076941] page dumped because: kasan: bad access detected [ 31.077716] [ 31.077966] Memory state around the buggy address: [ 31.078659] ffff88801583d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.079663] ffff88801583d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.080666] >ffff88801583d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.081658] ^ [ 31.082244] ffff88801583d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.083245] ffff88801583d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.084241] ================================================================== [ 31.085363] Disabling lock debugging due to kernel taint [ 33.244971] BUG: Bad rss-counter state mm:000000002d40efad type:MM_FILEPAGES val:33 [ 33.246237] BUG: Bad rss-counter state mm:000000002d40efad type:MM_ANONPAGES val:22 [ 33.704041] BUG: Bad rss-counter state mm:00000000a369c304 type:MM_FILEPAGES val:33 [ 33.705323] BUG: Bad rss-counter state mm:00000000a369c304 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57153' (ECDSA) to the list of known hosts. 2023/06/21 04:03:54 fuzzer started 2023/06/21 04:03:54 dialing manager at localhost:36067 2023/06/21 04:03:54 checking machine... 2023/06/21 04:03:54 checking revisions... [ 34.454814] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:03:54 testing simple program... [ 34.512233] cgroup: Unknown subsys name 'net' [ 34.568789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:03:54 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff85652d08 RCX=0000000000000000 RDX=ffff88800e823680 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801595f860 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000092cc0 RIP=ffffffff84511dca 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 00007f7a5596f900 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=00007f9be15d0650 CR3=000000000c5ec000 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=45e5de657c7b065e00000000000ae988 XMM05=55e62fc18d6daf710000000000134530 XMM06=e4cb8bb95a7664b600000000001333c8 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=ffff888019f173c0 RCX=0000000000000000 RDX=1ffff110033db80d RSI=ffffffff8186bde2 RDI=ffff888019edc068 RBP=ffff88800e0d9180 RSP=ffff888014657de0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000008 R13=ffff88800e0d91d0 R14=ffff888019edc000 R15=0000000000000000 RIP=ffffffff8186be26 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 00007f9be101b900 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=00007fff97e85000 CR3=00000000146be000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000