syzkaller login: [ 35.958794] BUG: Bad rss-counter state mm:00000000d7a5a3b5 type:MM_FILEPAGES val:33 [ 35.959494] BUG: Bad rss-counter state mm:00000000d7a5a3b5 type:MM_ANONPAGES val:22 [ 36.025330] ================================================================== [ 36.027257] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.029184] Read of size 8 at addr ffff8880186e6140 by task sshd/220 [ 36.030759] [ 36.031151] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.032904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.038878] Call Trace: [ 36.039489] [ 36.040012] dump_stack_lvl+0x91/0xf0 [ 36.040951] print_report+0xcc/0x620 [ 36.041865] ? __virt_addr_valid+0x102/0x340 [ 36.042972] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.044199] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.045411] kasan_report+0xbe/0xf0 [ 36.046302] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.047553] vma_interval_tree_remove+0xc75/0xec0 [ 36.048735] vma_prepare+0xc54/0x11a0 [ 36.049652] __split_vma+0x5af/0x950 [ 36.050550] ? __pfx___split_vma+0x10/0x10 [ 36.051586] ? find_held_lock+0x2c/0x110 [ 36.052580] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.053701] ? lock_is_held_type+0x9f/0x120 [ 36.054773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.055996] ? mtree_range_walk+0x632/0x900 [ 36.057094] ? mas_walk+0x5c7/0x7c0 [ 36.058005] do_vmi_munmap+0x1f1/0x2b0 [ 36.058975] mmap_region+0x1f9/0x2660 [ 36.059921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.060933] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.062374] ? __pfx_lock_acquire+0x10/0x10 [ 36.063458] ? __pfx_mmap_region+0x10/0x10 [ 36.064508] ? security_mmap_addr+0x7d/0xa0 [ 36.065567] ? get_unmapped_area+0x1f5/0x3f0 [ 36.066654] do_mmap+0x854/0xf00 [ 36.067507] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.068473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.069560] ksys_mmap_pgoff+0x3af/0x500 [ 36.070570] do_syscall_64+0x3f/0x90 [ 36.071514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.072797] RIP: 0033:0x7f0d4b3cbd82 [ 36.073709] 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 [ 36.078299] RSP: 002b:00007fff2512faa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.080191] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d4b3cbd82 [ 36.081949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d4a805000 [ 36.083753] RBP: 00007f0d4a805000 R08: 0000000000000009 R09: 0000000000001000 [ 36.085487] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d269b1ef70 [ 36.087290] R13: 00007fff2512fac0 R14: 00007fff2512faf0 R15: 00007fff2512fe50 [ 36.089079] [ 36.089660] [ 36.090064] Allocated by task 213: [ 36.090928] kasan_save_stack+0x22/0x50 [ 36.091909] kasan_set_track+0x25/0x30 [ 36.092870] __kasan_slab_alloc+0x59/0x70 [ 36.093895] kmem_cache_alloc+0x16b/0x370 [ 36.094934] vm_area_dup+0x20/0x160 [ 36.095824] __split_vma+0x170/0x950 [ 36.096743] split_vma+0xc6/0x110 [ 36.097596] mprotect_fixup+0x8d2/0xb30 [ 36.098591] do_mprotect_pkey+0x87e/0xd40 [ 36.099650] __x64_sys_mprotect+0x78/0xc0 [ 36.100691] do_syscall_64+0x3f/0x90 [ 36.101600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.102900] [ 36.103305] Freed by task 213: [ 36.104082] kasan_save_stack+0x22/0x50 [ 36.105042] kasan_set_track+0x25/0x30 [ 36.106004] kasan_save_free_info+0x2b/0x50 [ 36.107078] __kasan_slab_free+0x10a/0x190 [ 36.108126] kmem_cache_free+0x10d/0x4d0 [ 36.109120] rcu_core+0x8c8/0x2860 [ 36.109938] __do_softirq+0x1b7/0x7d4 [ 36.110878] [ 36.111277] Last potentially related work creation: [ 36.112497] kasan_save_stack+0x22/0x50 [ 36.113453] __kasan_record_aux_stack+0x8e/0xa0 [ 36.114583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.115829] remove_vma+0x139/0x170 [ 36.116618] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.117659] do_vmi_munmap+0x1f1/0x2b0 [ 36.118515] __vm_munmap+0x138/0x3a0 [ 36.119329] __x64_sys_munmap+0x59/0x80 [ 36.120183] do_syscall_64+0x3f/0x90 [ 36.120999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.122201] [ 36.122601] Second to last potentially related work creation: [ 36.123987] kasan_save_stack+0x22/0x50 [ 36.124874] __kasan_record_aux_stack+0x8e/0xa0 [ 36.125875] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.127000] remove_vma+0x139/0x170 [ 36.127792] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.128854] do_vmi_munmap+0x1f1/0x2b0 [ 36.129743] mmap_region+0x1f9/0x2660 [ 36.130558] do_mmap+0x854/0xf00 [ 36.131310] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.132145] ksys_mmap_pgoff+0x3af/0x500 [ 36.133031] do_syscall_64+0x3f/0x90 [ 36.133941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.135193] [ 36.135598] The buggy address belongs to the object at ffff8880186e60e8 [ 36.135598] which belongs to the cache vm_area_struct of size 168 [ 36.138661] The buggy address is located 88 bytes inside of [ 36.138661] freed 168-byte region [ffff8880186e60e8, ffff8880186e6190) [ 36.141576] [ 36.141967] The buggy address belongs to the physical page: [ 36.143325] page:0000000070873bf7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186e6 [ 36.145406] memcg:ffff888019e76c01 [ 36.146162] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.147527] page_type: 0xffffffff() [ 36.148310] raw: 0100000000000200 ffff8880087a0c80 ffffea000061bc00 dead000000000009 [ 36.150105] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e76c01 [ 36.152010] page dumped because: kasan: bad access detected [ 36.153363] [ 36.153766] Memory state around the buggy address: [ 36.154959] ffff8880186e6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.156761] ffff8880186e6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 36.158503] >ffff8880186e6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.160262] ^ [ 36.161605] ffff8880186e6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.163432] ffff8880186e6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.165184] ================================================================== [ 36.167245] Disabling lock debugging due to kernel taint [ 42.171187] BUG: Bad rss-counter state mm:00000000e98e6772 type:MM_FILEPAGES val:33 [ 42.171779] BUG: Bad rss-counter state mm:00000000e98e6772 type:MM_ANONPAGES val:22 [ 43.610905] BUG: Bad rss-counter state mm:000000004390f9e6 type:MM_FILEPAGES val:33 [ 43.611639] BUG: Bad rss-counter state mm:000000004390f9e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20159' (ECDSA) to the list of known hosts. 2023/06/21 08:21:07 fuzzer started 2023/06/21 08:21:07 dialing manager at localhost:36067 2023/06/21 08:21:07 checking machine... 2023/06/21 08:21:07 checking revisions... [ 44.548662] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:21:07 testing simple program... [ 44.641227] cgroup: Unknown subsys name 'net' [ 44.742389] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:21:07 Registers: info registers vcpu 0 RAX=1ffffffff0bb31b7 RBX=ffffffff85d98dbc RCX=ffffffff8118d7d8 RDX=0000000000000000 RSI=ffffffff860a12ea RDI=ffffffff85d98db0 RBP=ffffffff85d98dbc RSP=ffff888008d9f8c0 R8 =ffffffff860a12ea R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffffffff85d98dc0 R13=ffffffff85d98db0 R14=ffffffff85d98db8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 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=00007f6f20f50328 CR3=000000000eac2000 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=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=dffffc0000000000 RBX=ffff88800fddf488 RCX=0000000000000001 RDX=1ffff11001fbbe92 RSI=ffff88800fddf5b8 RDI=ffff88800fddf490 RBP=ffff88800fddf5b8 RSP=ffff88800fddf3e0 R8 =ffffffff860d825a R9 =ffff88800fddf4c8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff88800fddf4d0 R14=ffff88800fddf5c0 R15=ffff88800fddf488 RIP=ffffffff81130445 RFL=00000246 [---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 =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=00007f98790ef6f8 CR3=0000000016a74000 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=00000000000000000000000000000000 XMM01=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000