syzkaller login: [ 33.131854] BUG: Bad rss-counter state mm:00000000eacea252 type:MM_FILEPAGES val:33 [ 33.133774] BUG: Bad rss-counter state mm:00000000eacea252 type:MM_ANONPAGES val:22 [ 33.258894] ================================================================== [ 33.259611] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.260327] Read of size 8 at addr ffff8880094e0310 by task sshd/219 [ 33.260918] [ 33.261086] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.261747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.262491] Call Trace: [ 33.262837] [ 33.263063] dump_stack_lvl+0x91/0xf0 [ 33.263451] print_report+0xcc/0x620 [ 33.263821] ? __virt_addr_valid+0x102/0x340 [ 33.264243] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.264708] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.265192] kasan_report+0xbe/0xf0 [ 33.265555] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.266025] vma_interval_tree_remove+0xc75/0xec0 [ 33.266484] vma_prepare+0xc54/0x11a0 [ 33.266852] __split_vma+0x5af/0x950 [ 33.267212] ? __pfx___split_vma+0x10/0x10 [ 33.267627] ? find_held_lock+0x2c/0x110 [ 33.268027] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.268465] ? lock_is_held_type+0x9f/0x120 [ 33.268878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.269346] ? mtree_range_walk+0x632/0x900 [ 33.269770] ? mas_walk+0x5c7/0x7c0 [ 33.270131] do_vmi_munmap+0x1f1/0x2b0 [ 33.270511] mmap_region+0x1f9/0x2660 [ 33.270882] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.271282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.271834] ? __pfx_lock_acquire+0x10/0x10 [ 33.272247] ? __pfx_mmap_region+0x10/0x10 [ 33.272657] ? security_mmap_addr+0x7d/0xa0 [ 33.273067] ? get_unmapped_area+0x1f5/0x3f0 [ 33.273490] do_mmap+0x854/0xf00 [ 33.273824] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.274201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.274636] ksys_mmap_pgoff+0x3af/0x500 [ 33.275020] do_syscall_64+0x3f/0x90 [ 33.275399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.275899] RIP: 0033:0x7f2f82078d82 [ 33.276244] 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 [ 33.277867] RSP: 002b:00007ffd546108a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.278560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f82078d82 [ 33.279213] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f814b2000 [ 33.279873] RBP: 00007f2f814b2000 R08: 0000000000000009 R09: 0000000000001000 [ 33.280519] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563475914f70 [ 33.281167] R13: 00007ffd546108c0 R14: 00007ffd546108f0 R15: 00007ffd54610c50 [ 33.281827] [ 33.282049] [ 33.282212] Allocated by task 212: [ 33.282542] kasan_save_stack+0x22/0x50 [ 33.282928] kasan_set_track+0x25/0x30 [ 33.283327] __kasan_slab_alloc+0x59/0x70 [ 33.283725] kmem_cache_alloc+0x16b/0x370 [ 33.284120] vm_area_dup+0x20/0x160 [ 33.284472] __split_vma+0x170/0x950 [ 33.284832] split_vma+0xc6/0x110 [ 33.285170] mprotect_fixup+0x8d2/0xb30 [ 33.285552] do_mprotect_pkey+0x87e/0xd40 [ 33.285950] __x64_sys_mprotect+0x78/0xc0 [ 33.286351] do_syscall_64+0x3f/0x90 [ 33.286714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.287213] [ 33.287384] Freed by task 212: [ 33.287684] kasan_save_stack+0x22/0x50 [ 33.288074] kasan_set_track+0x25/0x30 [ 33.288455] kasan_save_free_info+0x2b/0x50 [ 33.288861] __kasan_slab_free+0x10a/0x190 [ 33.289269] kmem_cache_free+0x10d/0x4d0 [ 33.289657] rcu_core+0x8c8/0x2860 [ 33.289999] __do_softirq+0x1b7/0x7d4 [ 33.290366] [ 33.290530] Last potentially related work creation: [ 33.290977] kasan_save_stack+0x22/0x50 [ 33.291371] __kasan_record_aux_stack+0x8e/0xa0 [ 33.291812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.292302] remove_vma+0x139/0x170 [ 33.292645] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.293083] do_vmi_munmap+0x1f1/0x2b0 [ 33.293452] __vm_munmap+0x138/0x3a0 [ 33.293808] __x64_sys_munmap+0x59/0x80 [ 33.294197] do_syscall_64+0x3f/0x90 [ 33.294560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.295050] [ 33.295214] The buggy address belongs to the object at ffff8880094e02b8 [ 33.295214] which belongs to the cache vm_area_struct of size 168 [ 33.296361] The buggy address is located 88 bytes inside of [ 33.296361] freed 168-byte region [ffff8880094e02b8, ffff8880094e0360) [ 33.297434] [ 33.297598] The buggy address belongs to the physical page: [ 33.298106] page:00000000580d8d57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94e0 [ 33.298937] memcg:ffff888019e6b801 [ 33.299271] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.299769] page_type: 0xffffffff() [ 33.300124] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.300832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e6b801 [ 33.301531] page dumped because: kasan: bad access detected [ 33.302043] [ 33.302208] Memory state around the buggy address: [ 33.302652] ffff8880094e0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.303314] ffff8880094e0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.303971] >ffff8880094e0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.304619] ^ [ 33.304976] ffff8880094e0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.305628] ffff8880094e0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.306290] ================================================================== [ 33.307023] Disabling lock debugging due to kernel taint [ 35.221347] BUG: Bad rss-counter state mm:00000000994cf9ec type:MM_FILEPAGES val:33 [ 35.222522] BUG: Bad rss-counter state mm:00000000994cf9ec type:MM_ANONPAGES val:22 [ 35.636307] BUG: Bad rss-counter state mm:000000007ddb2b4a type:MM_FILEPAGES val:33 [ 35.637329] BUG: Bad rss-counter state mm:000000007ddb2b4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28564' (ECDSA) to the list of known hosts. 2023/06/20 10:41:54 fuzzer started 2023/06/20 10:41:54 dialing manager at localhost:44161 2023/06/20 10:41:54 checking machine... 2023/06/20 10:41:54 checking revisions... [ 36.387414] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:41:54 testing simple program... [ 36.439889] cgroup: Unknown subsys name 'net' [ 36.488382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:41:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dfca8c RCX=ffffffff8180c8d9 RDX=0000000000000001 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffffffff85dfca8c RSP=ffff88800c9ef650 R8 =ffffffff861375e0 R9 =ffff88800c9ef748 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfca90 R13=ffffffff85dfca8c R14=ffffffff85dfca8c R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000257 [---ZAPC] 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 00007fa0b9d69900 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=00007ffcbb252000 CR3=000000000efda000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007fa1fdd319c0 CR3=0000000006800000 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=2034353a31343a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a31343a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000