syzkaller login: [ 30.969659] BUG: Bad rss-counter state mm:0000000093f99b5f type:MM_FILEPAGES val:33 [ 30.970654] BUG: Bad rss-counter state mm:0000000093f99b5f type:MM_ANONPAGES val:22 [ 31.131191] ================================================================== [ 31.132094] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.133032] Read of size 8 at addr ffff888016b46140 by task sshd/219 [ 31.133805] [ 31.134035] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.135000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.135989] Call Trace: [ 31.136309] [ 31.136602] dump_stack_lvl+0x91/0xf0 [ 31.137094] print_report+0xcc/0x620 [ 31.137583] ? __virt_addr_valid+0x102/0x340 [ 31.138138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.138762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.139373] kasan_report+0xbe/0xf0 [ 31.139878] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.140504] vma_interval_tree_remove+0xc75/0xec0 [ 31.141101] vma_prepare+0xc54/0x11a0 [ 31.141580] __split_vma+0x5af/0x950 [ 31.142060] ? __pfx___split_vma+0x10/0x10 [ 31.142591] ? find_held_lock+0x2c/0x110 [ 31.143114] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.143690] ? lock_is_held_type+0x9f/0x120 [ 31.144239] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.144848] ? mtree_range_walk+0x632/0x900 [ 31.145409] ? mas_walk+0x5c7/0x7c0 [ 31.145883] do_vmi_munmap+0x1f1/0x2b0 [ 31.146374] mmap_region+0x1f9/0x2660 [ 31.146860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.147371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.148097] ? __pfx_lock_acquire+0x10/0x10 [ 31.148639] ? __pfx_mmap_region+0x10/0x10 [ 31.149171] ? security_mmap_addr+0x7d/0xa0 [ 31.149703] ? get_unmapped_area+0x1f5/0x3f0 [ 31.150253] do_mmap+0x854/0xf00 [ 31.150689] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.151184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.151763] ksys_mmap_pgoff+0x3af/0x500 [ 31.152271] do_syscall_64+0x3f/0x90 [ 31.152750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.153396] RIP: 0033:0x7fbe1c0dfd82 [ 31.153862] 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 [ 31.155996] RSP: 002b:00007fffefdc6518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.156894] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe1c0dfd82 [ 31.157732] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe1b519000 [ 31.158578] RBP: 00007fbe1b519000 R08: 0000000000000009 R09: 0000000000001000 [ 31.159443] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d593117ec0 [ 31.160286] R13: 00007fffefdc6530 R14: 00007fffefdc6560 R15: 00007fffefdc68c0 [ 31.161138] [ 31.161426] [ 31.161639] Allocated by task 212: [ 31.162063] kasan_save_stack+0x22/0x50 [ 31.162561] kasan_set_track+0x25/0x30 [ 31.163054] __kasan_slab_alloc+0x59/0x70 [ 31.163589] kmem_cache_alloc+0x16b/0x370 [ 31.164107] vm_area_dup+0x20/0x160 [ 31.164558] __split_vma+0x170/0x950 [ 31.165018] split_vma+0xc6/0x110 [ 31.165456] mprotect_fixup+0x8d2/0xb30 [ 31.165955] do_mprotect_pkey+0x87e/0xd40 [ 31.166471] __x64_sys_mprotect+0x78/0xc0 [ 31.166993] do_syscall_64+0x3f/0x90 [ 31.167475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168118] [ 31.168341] Freed by task 212: [ 31.168732] kasan_save_stack+0x22/0x50 [ 31.169240] kasan_set_track+0x25/0x30 [ 31.169728] kasan_save_free_info+0x2b/0x50 [ 31.170256] __kasan_slab_free+0x10a/0x190 [ 31.170786] kmem_cache_free+0x10d/0x4d0 [ 31.171291] rcu_core+0x8c8/0x2860 [ 31.171749] __do_softirq+0x1b7/0x7d4 [ 31.172223] [ 31.172438] Last potentially related work creation: [ 31.173018] kasan_save_stack+0x22/0x50 [ 31.173516] __kasan_record_aux_stack+0x8e/0xa0 [ 31.174087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.174732] remove_vma+0x139/0x170 [ 31.175186] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.175758] do_vmi_munmap+0x1f1/0x2b0 [ 31.176238] __vm_munmap+0x138/0x3a0 [ 31.176705] __x64_sys_munmap+0x59/0x80 [ 31.177197] do_syscall_64+0x3f/0x90 [ 31.177669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.178310] [ 31.178523] The buggy address belongs to the object at ffff888016b460e8 [ 31.178523] which belongs to the cache vm_area_struct of size 168 [ 31.180004] The buggy address is located 88 bytes inside of [ 31.180004] freed 168-byte region [ffff888016b460e8, ffff888016b46190) [ 31.181393] [ 31.181606] The buggy address belongs to the physical page: [ 31.182275] page:0000000066bf1275 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b46 [ 31.183364] memcg:ffff888016b17401 [ 31.183801] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.184440] page_type: 0xffffffff() [ 31.184888] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.185797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b17401 [ 31.186694] page dumped because: kasan: bad access detected [ 31.187355] [ 31.187578] Memory state around the buggy address: [ 31.188155] ffff888016b46000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.189015] ffff888016b46080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.189866] >ffff888016b46100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.190707] ^ [ 31.191344] ffff888016b46180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.192238] ffff888016b46200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.193089] ================================================================== [ 31.194085] Disabling lock debugging due to kernel taint [ 33.525036] BUG: Bad rss-counter state mm:000000008cdc6233 type:MM_FILEPAGES val:33 [ 33.526203] BUG: Bad rss-counter state mm:000000008cdc6233 type:MM_ANONPAGES val:22 [ 34.000890] BUG: Bad rss-counter state mm:0000000098f076ae type:MM_FILEPAGES val:33 [ 34.002048] BUG: Bad rss-counter state mm:0000000098f076ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36585' (ECDSA) to the list of known hosts. 2023/06/21 04:35:37 fuzzer started 2023/06/21 04:35:37 dialing manager at localhost:36067 2023/06/21 04:35:37 checking machine... 2023/06/21 04:35:37 checking revisions... [ 34.704710] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:35:37 testing simple program... [ 34.758282] cgroup: Unknown subsys name 'net' [ 34.806580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:35:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856d84a0 RCX=ffffffff812e0473 RDX=1ffffffff0adb094 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a8 RSP=ffff88801696fc78 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=ffffffff856d84b0 R13=ffff88800e13af80 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff812e0577 RFL=00000012 [----A--] 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 00007f8b5175f900 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=00005653bc6b4768 CR3=000000000e1a8000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd84059868 CR3=0000000009ac2000 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=2037333a35333a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a35333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000