syzkaller login: [ 31.063839] BUG: Bad rss-counter state mm:00000000568b01ea type:MM_FILEPAGES val:33 [ 31.064863] BUG: Bad rss-counter state mm:00000000568b01ea type:MM_ANONPAGES val:22 [ 31.221928] ================================================================== [ 31.223006] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.224124] Read of size 8 at addr ffff88800e191798 by task sshd/219 [ 31.225213] [ 31.225470] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.226503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.227664] Call Trace: [ 31.228037] [ 31.228373] dump_stack_lvl+0x91/0xf0 [ 31.228948] print_report+0xcc/0x620 [ 31.229549] ? __virt_addr_valid+0x102/0x340 [ 31.230186] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.230799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231416] kasan_report+0xbe/0xf0 [ 31.231893] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232518] vma_interval_tree_remove+0xc75/0xec0 [ 31.233136] vma_prepare+0xc54/0x11a0 [ 31.233623] __split_vma+0x5af/0x950 [ 31.234094] ? __pfx___split_vma+0x10/0x10 [ 31.234635] ? find_held_lock+0x2c/0x110 [ 31.235160] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.235728] ? lock_is_held_type+0x9f/0x120 [ 31.236266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.236877] ? mtree_range_walk+0x632/0x900 [ 31.237447] ? mas_walk+0x5c7/0x7c0 [ 31.237927] do_vmi_munmap+0x1f1/0x2b0 [ 31.238425] mmap_region+0x1f9/0x2660 [ 31.238912] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.239424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.240134] ? __pfx_lock_acquire+0x10/0x10 [ 31.240671] ? __pfx_mmap_region+0x10/0x10 [ 31.241223] ? security_mmap_addr+0x7d/0xa0 [ 31.241755] ? get_unmapped_area+0x1f5/0x3f0 [ 31.242306] do_mmap+0x854/0xf00 [ 31.242746] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.243243] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.243809] ksys_mmap_pgoff+0x3af/0x500 [ 31.244322] do_syscall_64+0x3f/0x90 [ 31.244794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245445] RIP: 0033:0x7f9b2c334d82 [ 31.245907] 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 [ 31.248043] RSP: 002b:00007fff2f0f54d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.248961] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b2c334d82 [ 31.249833] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b2b76e000 [ 31.250687] RBP: 00007f9b2b76e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.251546] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559234c7cb20 [ 31.252393] R13: 00007fff2f0f54f0 R14: 00007fff2f0f5520 R15: 00007fff2f0f5880 [ 31.253280] [ 31.253577] [ 31.253790] Allocated by task 212: [ 31.254226] kasan_save_stack+0x22/0x50 [ 31.254726] kasan_set_track+0x25/0x30 [ 31.255226] __kasan_slab_alloc+0x59/0x70 [ 31.255752] kmem_cache_alloc+0x16b/0x370 [ 31.256270] vm_area_dup+0x20/0x160 [ 31.256726] __split_vma+0x170/0x950 [ 31.257200] split_vma+0xc6/0x110 [ 31.257653] mprotect_fixup+0x8d2/0xb30 [ 31.258159] do_mprotect_pkey+0x87e/0xd40 [ 31.258693] __x64_sys_mprotect+0x78/0xc0 [ 31.259226] do_syscall_64+0x3f/0x90 [ 31.259719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260380] [ 31.260602] Freed by task 212: [ 31.261019] kasan_save_stack+0x22/0x50 [ 31.261555] kasan_set_track+0x25/0x30 [ 31.262059] kasan_save_free_info+0x2b/0x50 [ 31.262605] __kasan_slab_free+0x10a/0x190 [ 31.263160] kmem_cache_free+0x10d/0x4d0 [ 31.263692] rcu_core+0x8c8/0x2860 [ 31.264153] __do_softirq+0x1b7/0x7d4 [ 31.264639] [ 31.264857] Last potentially related work creation: [ 31.265473] kasan_save_stack+0x22/0x50 [ 31.266051] __kasan_record_aux_stack+0x8e/0xa0 [ 31.266648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.267307] remove_vma+0x139/0x170 [ 31.267775] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.268350] do_vmi_munmap+0x1f1/0x2b0 [ 31.268845] __vm_munmap+0x138/0x3a0 [ 31.269343] __x64_sys_munmap+0x59/0x80 [ 31.269860] do_syscall_64+0x3f/0x90 [ 31.270341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271008] [ 31.271228] Second to last potentially related work creation: [ 31.271933] kasan_save_stack+0x22/0x50 [ 31.272442] __kasan_record_aux_stack+0x8e/0xa0 [ 31.273033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.273710] remove_vma+0x139/0x170 [ 31.274184] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.274763] do_vmi_munmap+0x1f1/0x2b0 [ 31.275271] mmap_region+0x1f9/0x2660 [ 31.275769] do_mmap+0x854/0xf00 [ 31.276215] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.276721] ksys_mmap_pgoff+0x3af/0x500 [ 31.277247] do_syscall_64+0x3f/0x90 [ 31.277738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278397] [ 31.278618] The buggy address belongs to the object at ffff88800e191740 [ 31.278618] which belongs to the cache vm_area_struct of size 168 [ 31.280128] The buggy address is located 88 bytes inside of [ 31.280128] freed 168-byte region [ffff88800e191740, ffff88800e1917e8) [ 31.281594] [ 31.281820] The buggy address belongs to the physical page: [ 31.282499] page:0000000036e24dd7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe191 [ 31.283616] memcg:ffff888019c6a301 [ 31.284045] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.284697] page_type: 0xffffffff() [ 31.285152] raw: 0100000000000200 ffff88800879fc80 ffffea00003ba980 0000000000000004 [ 31.286070] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c6a301 [ 31.286975] page dumped because: kasan: bad access detected [ 31.287638] [ 31.287856] Memory state around the buggy address: [ 31.288432] ffff88800e191680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.289316] ffff88800e191700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.290172] >ffff88800e191780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.291028] ^ [ 31.291523] ffff88800e191800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.292373] ffff88800e191880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.293242] ================================================================== [ 31.294165] Disabling lock debugging due to kernel taint [ 33.396547] BUG: Bad rss-counter state mm:00000000f7febb67 type:MM_FILEPAGES val:33 [ 33.397596] BUG: Bad rss-counter state mm:00000000f7febb67 type:MM_ANONPAGES val:22 [ 33.967200] BUG: Bad rss-counter state mm:000000000e5aae6a type:MM_FILEPAGES val:33 [ 33.968195] BUG: Bad rss-counter state mm:000000000e5aae6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56124' (ECDSA) to the list of known hosts. 2023/06/19 22:32:01 fuzzer started 2023/06/19 22:32:01 dialing manager at localhost:44161 2023/06/19 22:32:01 checking machine... 2023/06/19 22:32:01 checking revisions... [ 34.593172] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:32:01 testing simple program... [ 34.640340] cgroup: Unknown subsys name 'net' [ 34.724980] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:32:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861371f0 RDX=ffff8880147cf808 RSI=1ffff110028f9f03 RDI=1ffff110028f9f03 RBP=ffff8880147cf818 RSP=ffff8880147cf750 R8 =ffffffff861371f4 R9 =ffff8880147cf800 R10=0000000000038001 R11=0000000000020d06 R12=ffff8880147cf820 R13=ffff8880147cf808 R14=ffff8880147cfbb8 R15=ffff8880147cf7c0 RIP=ffffffff811310a7 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 00007ff8d1085900 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=00007ff8d050e030 CR3=000000000c60c000 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=580ceba51e99321100000000000ae988 XMM05=96018f68b9044eb50000000000135a00 XMM06=dfcdbad4f1609c370000000000134898 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0a8d8 RBX=ffffffff860546c4 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff860546c4 RSP=ffff88806cf099b8 R8 =ffffffff864baff8 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546c4 R13=ffffffff8605469c R14=ffffffff860546c0 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000217 [----APC] 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 00007f50237e2900 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=00007f50237c1020 CR3=000000000eed8000 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