syzkaller login: [ 35.991970] BUG: Bad rss-counter state mm:00000000afe49d2a type:MM_FILEPAGES val:33 [ 35.992661] BUG: Bad rss-counter state mm:00000000afe49d2a type:MM_ANONPAGES val:22 [ 36.093264] ================================================================== [ 36.093911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.094521] Read of size 8 at addr ffff88800ffc2df0 by task sshd/220 [ 36.095020] [ 36.095162] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.095734] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.096391] Call Trace: [ 36.096596] [ 36.096778] dump_stack_lvl+0x91/0xf0 [ 36.097124] print_report+0xcc/0x620 [ 36.097439] ? __virt_addr_valid+0x102/0x340 [ 36.097984] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.098387] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.098797] kasan_report+0xbe/0xf0 [ 36.099110] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.099530] vma_interval_tree_remove+0xc75/0xec0 [ 36.099946] vma_prepare+0xc54/0x11a0 [ 36.100263] __split_vma+0x5af/0x950 [ 36.100575] ? __pfx___split_vma+0x10/0x10 [ 36.100922] ? find_held_lock+0x2c/0x110 [ 36.101318] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.101696] ? lock_is_held_type+0x9f/0x120 [ 36.102060] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.102469] ? mtree_range_walk+0x632/0x900 [ 36.102830] ? mas_walk+0x5c7/0x7c0 [ 36.103140] do_vmi_munmap+0x1f1/0x2b0 [ 36.103472] mmap_region+0x1f9/0x2660 [ 36.103803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.104146] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.104624] ? __pfx_lock_acquire+0x10/0x10 [ 36.104983] ? __pfx_mmap_region+0x10/0x10 [ 36.105360] ? security_mmap_addr+0x7d/0xa0 [ 36.105707] ? get_unmapped_area+0x1f5/0x3f0 [ 36.106055] do_mmap+0x854/0xf00 [ 36.106337] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.106649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.107004] ksys_mmap_pgoff+0x3af/0x500 [ 36.107320] do_syscall_64+0x3f/0x90 [ 36.107641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.108077] RIP: 0033:0x7f9c3b5c3d82 [ 36.108386] 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 [ 36.109813] RSP: 002b:00007ffc42a15f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.110412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c3b5c3d82 [ 36.110952] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c3a9fd000 [ 36.111501] RBP: 00007f9c3a9fd000 R08: 0000000000000009 R09: 0000000000001000 [ 36.112037] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1cb014ec0 [ 36.112570] R13: 00007ffc42a15f50 R14: 00007ffc42a15f80 R15: 00007ffc42a162e0 [ 36.113145] [ 36.113335] [ 36.113477] Allocated by task 213: [ 36.113758] kasan_save_stack+0x22/0x50 [ 36.114106] kasan_set_track+0x25/0x30 [ 36.114439] __kasan_slab_alloc+0x59/0x70 [ 36.114779] kmem_cache_alloc+0x16b/0x370 [ 36.115119] vm_area_dup+0x20/0x160 [ 36.115429] __split_vma+0x170/0x950 [ 36.115756] split_vma+0xc6/0x110 [ 36.116049] mprotect_fixup+0x8d2/0xb30 [ 36.116370] do_mprotect_pkey+0x87e/0xd40 [ 36.116706] __x64_sys_mprotect+0x78/0xc0 [ 36.117066] do_syscall_64+0x3f/0x90 [ 36.117369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.117789] [ 36.117929] Freed by task 213: [ 36.118186] kasan_save_stack+0x22/0x50 [ 36.118527] kasan_set_track+0x25/0x30 [ 36.118867] kasan_save_free_info+0x2b/0x50 [ 36.119217] __kasan_slab_free+0x10a/0x190 [ 36.119561] kmem_cache_free+0x10d/0x4d0 [ 36.119903] rcu_core+0x8c8/0x2860 [ 36.120205] __do_softirq+0x1b7/0x7d4 [ 36.120531] [ 36.120670] Last potentially related work creation: [ 36.121110] kasan_save_stack+0x22/0x50 [ 36.121455] __kasan_record_aux_stack+0x8e/0xa0 [ 36.121839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.122287] remove_vma+0x139/0x170 [ 36.122590] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.123033] do_vmi_munmap+0x1f1/0x2b0 [ 36.123365] __vm_munmap+0x138/0x3a0 [ 36.123682] __x64_sys_munmap+0x59/0x80 [ 36.124014] do_syscall_64+0x3f/0x90 [ 36.124335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.124769] [ 36.124918] The buggy address belongs to the object at ffff88800ffc2d98 [ 36.124918] which belongs to the cache vm_area_struct of size 168 [ 36.125990] The buggy address is located 88 bytes inside of [ 36.125990] freed 168-byte region [ffff88800ffc2d98, ffff88800ffc2e40) [ 36.126950] [ 36.127097] The buggy address belongs to the physical page: [ 36.127552] page:000000007d7b8e6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffc2 [ 36.128360] memcg:ffff88800edd7801 [ 36.128653] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.129157] page_type: 0xffffffff() [ 36.129457] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.130097] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edd7801 [ 36.130750] page dumped because: kasan: bad access detected [ 36.131209] [ 36.131353] Memory state around the buggy address: [ 36.131745] ffff88800ffc2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.132327] ffff88800ffc2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.132981] >ffff88800ffc2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.133617] ^ [ 36.134154] ffff88800ffc2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.134745] ffff88800ffc2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.135366] ================================================================== [ 36.136525] Disabling lock debugging due to kernel taint [ 38.181317] BUG: Bad rss-counter state mm:0000000081e8a443 type:MM_FILEPAGES val:33 [ 38.182052] BUG: Bad rss-counter state mm:0000000081e8a443 type:MM_ANONPAGES val:22 [ 38.486716] BUG: Bad rss-counter state mm:0000000050456abf type:MM_FILEPAGES val:33 [ 38.487386] BUG: Bad rss-counter state mm:0000000050456abf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43938' (ECDSA) to the list of known hosts. 2023/06/20 09:04:38 fuzzer started 2023/06/20 09:04:38 dialing manager at localhost:44161 2023/06/20 09:04:38 checking machine... 2023/06/20 09:04:38 checking revisions... [ 39.079511] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:04:38 testing simple program... [ 39.123003] cgroup: Unknown subsys name 'net' [ 39.164541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:04:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffcc7837358 CR3=0000000013f72000 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=2038333a34303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff856528e0 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c83f1 RDI=ffff88800e4903f4 RBP=00007f44b7b716c3 RSP=ffff88801695f8b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f44b7b716c3 R13=0000000000000000 R14=ffff88800e490000 R15=ffff88800e963500 RIP=ffffffff814c07f1 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 00007f44b768e900 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=00007fff0d4ae000 CR3=000000000ede4000 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