syzkaller login: [ 31.000342] BUG: Bad rss-counter state mm:00000000123975d2 type:MM_FILEPAGES val:33 [ 31.001230] BUG: Bad rss-counter state mm:00000000123975d2 type:MM_ANONPAGES val:22 [ 31.032032] ================================================================== [ 31.032693] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.033358] Read of size 8 at addr ffff88800e459798 by task sshd/220 [ 31.033896] [ 31.034052] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.034754] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.035421] Call Trace: [ 31.035648] [ 31.035850] dump_stack_lvl+0x91/0xf0 [ 31.036206] print_report+0xcc/0x620 [ 31.036553] ? __virt_addr_valid+0x102/0x340 [ 31.036929] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.037363] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.037804] kasan_report+0xbe/0xf0 [ 31.038135] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.038551] vma_interval_tree_remove+0xc75/0xec0 [ 31.038977] vma_prepare+0xc54/0x11a0 [ 31.039312] __split_vma+0x5af/0x950 [ 31.039646] ? __pfx___split_vma+0x10/0x10 [ 31.040013] ? find_held_lock+0x2c/0x110 [ 31.040395] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.040801] ? lock_is_held_type+0x9f/0x120 [ 31.041171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.041610] ? mtree_range_walk+0x632/0x900 [ 31.042000] ? mas_walk+0x5c7/0x7c0 [ 31.042338] do_vmi_munmap+0x1f1/0x2b0 [ 31.042687] mmap_region+0x1f9/0x2660 [ 31.043028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.043400] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.043899] ? __pfx_lock_acquire+0x10/0x10 [ 31.044290] ? __pfx_mmap_region+0x10/0x10 [ 31.044653] ? security_mmap_addr+0x7d/0xa0 [ 31.045028] ? get_unmapped_area+0x1f5/0x3f0 [ 31.045427] do_mmap+0x854/0xf00 [ 31.045737] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.046094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.046497] ksys_mmap_pgoff+0x3af/0x500 [ 31.046853] do_syscall_64+0x3f/0x90 [ 31.047186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.047623] RIP: 0033:0x7f7d76d5ad82 [ 31.047947] 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 [ 31.049478] RSP: 002b:00007ffcd2cf3d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.050140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d76d5ad82 [ 31.050749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d76194000 [ 31.051387] RBP: 00007f7d76194000 R08: 0000000000000009 R09: 0000000000001000 [ 31.051997] R10: 0000000000000812 R11: 0000000000000206 R12: 000055839d9c2f70 [ 31.052614] R13: 00007ffcd2cf3d80 R14: 00007ffcd2cf3db0 R15: 00007ffcd2cf4110 [ 31.053219] [ 31.053428] [ 31.053578] Allocated by task 213: [ 31.053885] kasan_save_stack+0x22/0x50 [ 31.054252] kasan_set_track+0x25/0x30 [ 31.054607] __kasan_slab_alloc+0x59/0x70 [ 31.054979] kmem_cache_alloc+0x16b/0x370 [ 31.055357] vm_area_dup+0x20/0x160 [ 31.055683] __split_vma+0x170/0x950 [ 31.056020] split_vma+0xc6/0x110 [ 31.056365] mprotect_fixup+0x8d2/0xb30 [ 31.056725] do_mprotect_pkey+0x87e/0xd40 [ 31.057096] __x64_sys_mprotect+0x78/0xc0 [ 31.057489] do_syscall_64+0x3f/0x90 [ 31.057831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058275] [ 31.058428] Freed by task 213: [ 31.058714] kasan_save_stack+0x22/0x50 [ 31.059077] kasan_set_track+0x25/0x30 [ 31.059433] kasan_save_free_info+0x2b/0x50 [ 31.059815] __kasan_slab_free+0x10a/0x190 [ 31.060170] kmem_cache_free+0x10d/0x4d0 [ 31.060540] rcu_core+0x8c8/0x2860 [ 31.060859] __do_softirq+0x1b7/0x7d4 [ 31.061185] [ 31.061332] Last potentially related work creation: [ 31.061741] kasan_save_stack+0x22/0x50 [ 31.062085] __kasan_record_aux_stack+0x8e/0xa0 [ 31.062477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.062920] remove_vma+0x139/0x170 [ 31.063229] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.063604] do_vmi_munmap+0x1f1/0x2b0 [ 31.063938] __vm_munmap+0x138/0x3a0 [ 31.064277] __x64_sys_munmap+0x59/0x80 [ 31.064616] do_syscall_64+0x3f/0x90 [ 31.064942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.065393] [ 31.065541] Second to last potentially related work creation: [ 31.066011] kasan_save_stack+0x22/0x50 [ 31.066363] __kasan_record_aux_stack+0x8e/0xa0 [ 31.066763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.067200] remove_vma+0x139/0x170 [ 31.067509] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.067891] do_vmi_munmap+0x1f1/0x2b0 [ 31.068233] __vm_munmap+0x138/0x3a0 [ 31.068557] elf_map+0x26f/0x310 [ 31.068864] load_elf_binary+0x3417/0x5030 [ 31.069229] bprm_execve+0x803/0x1940 [ 31.069548] do_execveat_common+0x734/0x8e0 [ 31.069913] __x64_sys_execve+0x93/0xc0 [ 31.070247] do_syscall_64+0x3f/0x90 [ 31.070575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.071015] [ 31.071166] The buggy address belongs to the object at ffff88800e459740 [ 31.071166] which belongs to the cache vm_area_struct of size 168 [ 31.072170] The buggy address is located 88 bytes inside of [ 31.072170] freed 168-byte region [ffff88800e459740, ffff88800e4597e8) [ 31.073160] [ 31.073309] The buggy address belongs to the physical page: [ 31.073764] page:0000000092bc2a7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe459 [ 31.074506] memcg:ffff88800ed0ca01 [ 31.074802] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.075280] page_type: 0xffffffff() [ 31.075588] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.076237] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed0ca01 [ 31.076868] page dumped because: kasan: bad access detected [ 31.077324] [ 31.077469] Memory state around the buggy address: [ 31.077868] ffff88800e459680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.078461] ffff88800e459700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.079048] >ffff88800e459780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.079633] ^ [ 31.079973] ffff88800e459800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.080580] ffff88800e459880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.081159] ================================================================== [ 31.081877] Disabling lock debugging due to kernel taint [ 32.599664] BUG: Bad rss-counter state mm:00000000e031f32f type:MM_FILEPAGES val:33 [ 32.600396] BUG: Bad rss-counter state mm:00000000e031f32f type:MM_ANONPAGES val:22 [ 32.945785] BUG: Bad rss-counter state mm:000000003d5066e8 type:MM_FILEPAGES val:33 [ 32.946452] BUG: Bad rss-counter state mm:000000003d5066e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60554' (ECDSA) to the list of known hosts. 2023/06/20 08:43:43 fuzzer started 2023/06/20 08:43:43 dialing manager at localhost:44161 2023/06/20 08:43:43 checking machine... 2023/06/20 08:43:43 checking revisions... [ 33.482944] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:43:43 testing simple program... [ 33.522580] cgroup: Unknown subsys name 'net' [ 33.567171] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:43:42 Registers: info registers vcpu 0 RAX=ffffffff8180c522 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff110028dbeb4 RSI=ffffffff8180c522 RDI=ffff8880146df610 RBP=ffff8880146df5e0 RSP=ffff8880146df540 R8 =ffffffff860d68fa R9 =ffff8880146df588 R10=0000000000038001 R11=0000000000010b7e R12=ffff8880146df610 R13=0000000000000000 R14=ffff888006aa51c0 R15=ffff88800df4b180 RIP=ffffffff84532440 RFL=00000286 [--S--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 00007f69db5ff900 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=00007f69daa7b990 CR3=000000000d784000 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=00000000000000000000000000000000 XMM01=3ca12d97050db389b7414007a6dc85b6 XMM02=000000000011dd60eff9b2d0a8fce9cb XMM03=000000000011de302c67c8bc2e329bc3 XMM04=7d4de99e7d800d1900000000000ae988 XMM05=79670615c349da0b0000000000136ca8 XMM06=4fda316b135da52b0000000000135d48 XMM07=fb795ef6d65770560000000000124bb0 XMM08=2c67c8bc2e329bc3000000000011ddd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015a29b40 RSI=0000000000000800 RDI=0000000000000000 RBP=000000000fbd31b0 RSP=ffff88800ca4fcc8 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000800 R14=ffffffff81ef13be R15=ffff888019ea8e00 RIP=ffffffff814c02f0 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 00007ff6f80b5900 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=00007ffe51e2a000 CR3=0000000016b66000 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