syzkaller login: [ 73.273491] BUG: Bad rss-counter state mm:00000000f2642a55 type:MM_FILEPAGES val:33 [ 73.274691] BUG: Bad rss-counter state mm:00000000f2642a55 type:MM_ANONPAGES val:22 [ 73.316504] ================================================================== [ 73.317874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.318953] Read of size 8 at addr ffff88800986c228 by task sshd/219 [ 73.319710] [ 73.319930] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 73.320795] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.321784] Call Trace: [ 73.322104] [ 73.322389] dump_stack_lvl+0x91/0xf0 [ 73.322880] print_report+0xcc/0x620 [ 73.323365] ? __virt_addr_valid+0x102/0x340 [ 73.323915] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.324530] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.325150] kasan_report+0xbe/0xf0 [ 73.325631] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.326255] vma_interval_tree_remove+0xc75/0xec0 [ 73.326864] vma_prepare+0xc54/0x11a0 [ 73.327341] __split_vma+0x5af/0x950 [ 73.327820] ? __pfx___split_vma+0x10/0x10 [ 73.328352] ? find_held_lock+0x2c/0x110 [ 73.328869] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.329465] ? lock_is_held_type+0x9f/0x120 [ 73.330003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.330613] ? mtree_range_walk+0x632/0x900 [ 73.331302] ? mas_walk+0x5c7/0x7c0 [ 73.331817] do_vmi_munmap+0x1f1/0x2b0 [ 73.332324] mmap_region+0x1f9/0x2660 [ 73.332802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.333325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.334071] ? __pfx_lock_acquire+0x10/0x10 [ 73.334608] ? __pfx_mmap_region+0x10/0x10 [ 73.335146] ? security_mmap_addr+0x7d/0xa0 [ 73.335678] ? get_unmapped_area+0x1f5/0x3f0 [ 73.336234] do_mmap+0x854/0xf00 [ 73.336682] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.337193] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.337760] ksys_mmap_pgoff+0x3af/0x500 [ 73.338266] do_syscall_64+0x3f/0x90 [ 73.338743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.339393] RIP: 0033:0x7f120067dd82 [ 73.339850] 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 [ 73.342010] RSP: 002b:00007fffcab78358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.342919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f120067dd82 [ 73.343775] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11ffab7000 [ 73.344622] RBP: 00007f11ffab7000 R08: 0000000000000009 R09: 0000000000001000 [ 73.345484] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557705007ec0 [ 73.346336] R13: 00007fffcab78370 R14: 00007fffcab783a0 R15: 00007fffcab78700 [ 73.347204] [ 73.347516] [ 73.347745] Allocated by task 212: [ 73.348185] kasan_save_stack+0x22/0x50 [ 73.348692] kasan_set_track+0x25/0x30 [ 73.349210] __kasan_slab_alloc+0x59/0x70 [ 73.349733] kmem_cache_alloc+0x16b/0x370 [ 73.350249] vm_area_dup+0x20/0x160 [ 73.350707] __split_vma+0x170/0x950 [ 73.351170] split_vma+0xc6/0x110 [ 73.351610] mprotect_fixup+0x8d2/0xb30 [ 73.352116] do_mprotect_pkey+0x87e/0xd40 [ 73.352634] __x64_sys_mprotect+0x78/0xc0 [ 73.353180] do_syscall_64+0x3f/0x90 [ 73.353673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.354348] [ 73.354572] Freed by task 212: [ 73.354976] kasan_save_stack+0x22/0x50 [ 73.355496] kasan_set_track+0x25/0x30 [ 73.356010] kasan_save_free_info+0x2b/0x50 [ 73.356575] __kasan_slab_free+0x10a/0x190 [ 73.357150] kmem_cache_free+0x10d/0x4d0 [ 73.357687] rcu_core+0x8c8/0x2860 [ 73.358143] __do_softirq+0x1b7/0x7d4 [ 73.358629] [ 73.358847] Last potentially related work creation: [ 73.359431] kasan_save_stack+0x22/0x50 [ 73.359970] __kasan_record_aux_stack+0x8e/0xa0 [ 73.360555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.361209] remove_vma+0x139/0x170 [ 73.361671] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.362245] do_vmi_munmap+0x1f1/0x2b0 [ 73.362733] __vm_munmap+0x138/0x3a0 [ 73.363204] __x64_sys_munmap+0x59/0x80 [ 73.363704] do_syscall_64+0x3f/0x90 [ 73.364174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.364829] [ 73.365048] Second to last potentially related work creation: [ 73.365752] kasan_save_stack+0x22/0x50 [ 73.366279] __kasan_record_aux_stack+0x8e/0xa0 [ 73.366877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.367552] remove_vma+0x139/0x170 [ 73.368025] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.368603] do_vmi_munmap+0x1f1/0x2b0 [ 73.369113] __vm_munmap+0x138/0x3a0 [ 73.369626] elf_map+0x26f/0x310 [ 73.370071] load_elf_binary+0x3417/0x5030 [ 73.370629] bprm_execve+0x803/0x1940 [ 73.371117] do_execveat_common+0x734/0x8e0 [ 73.371674] __x64_sys_execve+0x93/0xc0 [ 73.372190] do_syscall_64+0x3f/0x90 [ 73.372692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.373375] [ 73.373604] The buggy address belongs to the object at ffff88800986c1d0 [ 73.373604] which belongs to the cache vm_area_struct of size 168 [ 73.375088] The buggy address is located 88 bytes inside of [ 73.375088] freed 168-byte region [ffff88800986c1d0, ffff88800986c278) [ 73.376496] [ 73.376711] The buggy address belongs to the physical page: [ 73.377384] page:000000006bc45dab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x986c [ 73.378457] memcg:ffff888006b8d601 [ 73.378881] flags: 0x100000000000200(slab|node=0|zone=1) [ 73.379536] page_type: 0xffffffff() [ 73.380009] raw: 0100000000000200 ffff88800879fc80 ffffea00003be9c0 dead000000000006 [ 73.380937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006b8d601 [ 73.381851] page dumped because: kasan: bad access detected [ 73.382507] [ 73.382723] Memory state around the buggy address: [ 73.383319] ffff88800986c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.384212] ffff88800986c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 73.385108] >ffff88800986c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 73.385989] ^ [ 73.386553] ffff88800986c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 73.387434] ffff88800986c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 73.388291] ================================================================== [ 73.389221] Disabling lock debugging due to kernel taint [ 76.174555] BUG: Bad rss-counter state mm:000000000faee6e8 type:MM_FILEPAGES val:33 [ 76.175560] BUG: Bad rss-counter state mm:000000000faee6e8 type:MM_ANONPAGES val:22 [ 76.757549] BUG: Bad rss-counter state mm:000000006e7613f0 type:MM_FILEPAGES val:33 [ 76.758946] BUG: Bad rss-counter state mm:000000006e7613f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26322' (ECDSA) to the list of known hosts. 2023/06/20 08:40:15 fuzzer started 2023/06/20 08:40:15 dialing manager at localhost:44161 2023/06/20 08:40:15 checking machine... 2023/06/20 08:40:15 checking revisions... [ 77.624812] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:40:16 testing simple program... [ 77.701877] cgroup: Unknown subsys name 'net' [ 77.808957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:40:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c73f681 RCX=ffffffff836358fb RDX=ffff8880164e9b40 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800c73f680 RSP=ffff888015bd7dd0 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800c73f680 R11=0000000000000000 R12=ffff888015bd7e40 R13=ffff888015bd7e50 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000282 [--S----] 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 00007fd5261cc700 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=00007fd75ba80020 CR3=0000000019620000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36363534342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363635 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800c608140 RCX=0000000000000100 RDX=ffff88801593d1c0 RSI=0000000000000013 RDI=ffff88800c608140 RBP=0000000000000013 RSP=ffff88806cf09d28 R8 =ffff88806cf361d0 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffff88806cf361d8 R14=0000000000000001 R15=ffff88801432a000 RIP=ffffffff8181f464 RFL=00000046 [---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 00007f74c248a900 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=00007f74c254644c CR3=00000000194d0000 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=6720646572637465733a4d41503d706f 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