syzkaller login: [ 35.061442] BUG: Bad rss-counter state mm:00000000bfa8cb90 type:MM_FILEPAGES val:33 [ 35.062416] BUG: Bad rss-counter state mm:00000000bfa8cb90 type:MM_ANONPAGES val:22 [ 35.180862] ================================================================== [ 35.181690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.182366] Read of size 8 at addr ffff88801ab07310 by task sshd/220 [ 35.182912] [ 35.183074] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.183669] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.184591] Call Trace: [ 35.184815] [ 35.184990] dump_stack_lvl+0x91/0xf0 [ 35.185285] print_report+0xcc/0x620 [ 35.185571] ? __virt_addr_valid+0x102/0x340 [ 35.185917] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.186300] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.186726] kasan_report+0xbe/0xf0 [ 35.187058] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.187471] vma_interval_tree_remove+0xc75/0xec0 [ 35.187845] vma_prepare+0xc54/0x11a0 [ 35.188132] __split_vma+0x5af/0x950 [ 35.188416] ? __pfx___split_vma+0x10/0x10 [ 35.188755] ? find_held_lock+0x2c/0x110 [ 35.189093] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.189448] ? lock_is_held_type+0x9f/0x120 [ 35.189789] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.190167] ? mtree_range_walk+0x632/0x900 [ 35.190506] ? mas_walk+0x5c7/0x7c0 [ 35.190788] do_vmi_munmap+0x1f1/0x2b0 [ 35.191092] mmap_region+0x1f9/0x2660 [ 35.191376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.191671] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.192084] ? __pfx_lock_acquire+0x10/0x10 [ 35.192421] ? __pfx_mmap_region+0x10/0x10 [ 35.192851] ? security_mmap_addr+0x7d/0xa0 [ 35.193182] ? get_unmapped_area+0x1f5/0x3f0 [ 35.193521] do_mmap+0x854/0xf00 [ 35.193790] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.194095] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.194447] ksys_mmap_pgoff+0x3af/0x500 [ 35.194761] do_syscall_64+0x3f/0x90 [ 35.195065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.195453] RIP: 0033:0x7f4567ff2d82 [ 35.195737] 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 [ 35.197083] RSP: 002b:00007ffed13dd288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.197659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4567ff2d82 [ 35.198173] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f456742c000 [ 35.198694] RBP: 00007f456742c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.199216] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607da678b20 [ 35.199723] R13: 00007ffed13dd2a0 R14: 00007ffed13dd2d0 R15: 00007ffed13dd630 [ 35.200275] [ 35.200463] [ 35.200598] Allocated by task 213: [ 35.200901] kasan_save_stack+0x22/0x50 [ 35.201224] kasan_set_track+0x25/0x30 [ 35.201531] __kasan_slab_alloc+0x59/0x70 [ 35.201843] kmem_cache_alloc+0x16b/0x370 [ 35.202164] vm_area_dup+0x20/0x160 [ 35.202440] __split_vma+0x170/0x950 [ 35.202720] split_vma+0xc6/0x110 [ 35.202986] mprotect_fixup+0x8d2/0xb30 [ 35.203291] do_mprotect_pkey+0x87e/0xd40 [ 35.203604] __x64_sys_mprotect+0x78/0xc0 [ 35.203923] do_syscall_64+0x3f/0x90 [ 35.204210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.204597] [ 35.204782] Freed by task 213: [ 35.205026] kasan_save_stack+0x22/0x50 [ 35.205328] kasan_set_track+0x25/0x30 [ 35.205624] kasan_save_free_info+0x2b/0x50 [ 35.205949] __kasan_slab_free+0x10a/0x190 [ 35.206277] kmem_cache_free+0x10d/0x4d0 [ 35.206579] rcu_core+0x8c8/0x2860 [ 35.206842] __do_softirq+0x1b7/0x7d4 [ 35.207120] [ 35.207249] Last potentially related work creation: [ 35.207592] kasan_save_stack+0x22/0x50 [ 35.207909] __kasan_record_aux_stack+0x8e/0xa0 [ 35.208269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.208687] remove_vma+0x139/0x170 [ 35.208968] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.209303] do_vmi_munmap+0x1f1/0x2b0 [ 35.209597] __vm_munmap+0x138/0x3a0 [ 35.209881] __x64_sys_munmap+0x59/0x80 [ 35.210183] do_syscall_64+0x3f/0x90 [ 35.210469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.210860] [ 35.210990] The buggy address belongs to the object at ffff88801ab072b8 [ 35.210990] which belongs to the cache vm_area_struct of size 168 [ 35.211915] The buggy address is located 88 bytes inside of [ 35.211915] freed 168-byte region [ffff88801ab072b8, ffff88801ab07360) [ 35.212854] [ 35.212996] The buggy address belongs to the physical page: [ 35.213410] page:00000000bdbd342c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab07 [ 35.214100] memcg:ffff88800f6a2c01 [ 35.214386] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.214779] page_type: 0xffffffff() [ 35.215082] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.215723] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6a2c01 [ 35.216301] page dumped because: kasan: bad access detected [ 35.216766] [ 35.216918] Memory state around the buggy address: [ 35.217382] ffff88801ab07200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 35.217977] ffff88801ab07280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.218541] >ffff88801ab07300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.219073] ^ [ 35.219373] ffff88801ab07380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.219936] ffff88801ab07400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.220545] ================================================================== [ 35.221283] Disabling lock debugging due to kernel taint [ 37.065315] BUG: Bad rss-counter state mm:00000000761e3b06 type:MM_FILEPAGES val:33 [ 37.066092] BUG: Bad rss-counter state mm:00000000761e3b06 type:MM_ANONPAGES val:22 [ 37.484914] BUG: Bad rss-counter state mm:00000000196cb476 type:MM_FILEPAGES val:33 [ 37.486092] BUG: Bad rss-counter state mm:00000000196cb476 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1772' (ECDSA) to the list of known hosts. 2023/06/20 08:56:11 fuzzer started 2023/06/20 08:56:11 dialing manager at localhost:44161 2023/06/20 08:56:11 checking machine... 2023/06/20 08:56:11 checking revisions... [ 38.150449] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:56:11 testing simple program... [ 38.208115] cgroup: Unknown subsys name 'net' [ 38.252617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:06 Registers: info registers vcpu 0 RAX=ffffffff81807f5b RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801463f801 RSI=ffff88801463f898 RDI=ffff88801463f4c0 RBP=ffff88801463f4c0 RSP=ffff88801463f3f8 R8 =ffffffff8613dd34 R9 =ffff88801463f4a8 R10=0000000000038001 R11=0000000000021edf R12=ffff88801463f4c8 R13=ffff88801463f4b0 R14=ffff88801463f8a0 R15=ffff88801463f468 RIP=ffffffff81131049 RFL=00000202 [-------] 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 00007f50b3995900 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=00007f50b2e1a410 CR3=000000000da1e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e0938bb6b3e25e4000000000000ae988 XMM05=167a0815cab3ac100000000000134f28 XMM06=19e9129bd510f2350000000000133dc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffce2fc0488 CR3=00000000165e6000 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=2031313a36353a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a36353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000