syzkaller login: [ 41.015621] BUG: Bad rss-counter state mm:00000000494a5a36 type:MM_FILEPAGES val:33 [ 41.016764] BUG: Bad rss-counter state mm:00000000494a5a36 type:MM_ANONPAGES val:22 [ 41.186065] ================================================================== [ 41.186999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.187940] Read of size 8 at addr ffff88800fdd1880 by task sshd/222 [ 41.188703] [ 41.188922] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.189936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.190940] Call Trace: [ 41.191259] [ 41.191543] dump_stack_lvl+0x91/0xf0 [ 41.192044] print_report+0xcc/0x620 [ 41.192525] ? __virt_addr_valid+0x102/0x340 [ 41.193074] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.193698] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.194311] kasan_report+0xbe/0xf0 [ 41.194812] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.195435] vma_interval_tree_remove+0xc75/0xec0 [ 41.196033] vma_prepare+0xc54/0x11a0 [ 41.196516] __split_vma+0x5af/0x950 [ 41.196989] ? __pfx___split_vma+0x10/0x10 [ 41.197523] ? find_held_lock+0x2c/0x110 [ 41.198046] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.198628] ? lock_is_held_type+0x9f/0x120 [ 41.199166] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.199775] ? mtree_range_walk+0x632/0x900 [ 41.200330] ? mas_walk+0x5c7/0x7c0 [ 41.200872] do_vmi_munmap+0x1f1/0x2b0 [ 41.201451] mmap_region+0x1f9/0x2660 [ 41.202016] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.202641] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.203474] ? __pfx_lock_acquire+0x10/0x10 [ 41.204100] ? __pfx_mmap_region+0x10/0x10 [ 41.204717] ? security_mmap_addr+0x7d/0xa0 [ 41.205339] ? get_unmapped_area+0x1f5/0x3f0 [ 41.205978] do_mmap+0x854/0xf00 [ 41.206504] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.207087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.207745] ksys_mmap_pgoff+0x3af/0x500 [ 41.208337] do_syscall_64+0x3f/0x90 [ 41.208893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.209647] RIP: 0033:0x7fcef2b9dd82 [ 41.210180] 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 [ 41.212681] RSP: 002b:00007ffc53b58648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.213738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcef2b9dd82 [ 41.214763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcef1fd7000 [ 41.215758] RBP: 00007fcef1fd7000 R08: 0000000000000009 R09: 0000000000001000 [ 41.216760] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562eb43e0d90 [ 41.217752] R13: 00007ffc53b58660 R14: 00007ffc53b58690 R15: 00007ffc53b589f0 [ 41.218759] [ 41.219103] [ 41.219356] Allocated by task 214: [ 41.219862] kasan_save_stack+0x22/0x50 [ 41.220461] kasan_set_track+0x25/0x30 [ 41.221056] __kasan_slab_alloc+0x59/0x70 [ 41.221688] kmem_cache_alloc+0x16b/0x370 [ 41.222317] vm_area_dup+0x20/0x160 [ 41.222906] __split_vma+0x170/0x950 [ 41.223471] split_vma+0xc6/0x110 [ 41.224001] mprotect_fixup+0x8d2/0xb30 [ 41.224612] do_mprotect_pkey+0x87e/0xd40 [ 41.225243] __x64_sys_mprotect+0x78/0xc0 [ 41.225879] do_syscall_64+0x3f/0x90 [ 41.226459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.227260] [ 41.227523] Freed by task 19: [ 41.227989] kasan_save_stack+0x22/0x50 [ 41.228598] kasan_set_track+0x25/0x30 [ 41.229196] kasan_save_free_info+0x2b/0x50 [ 41.229859] __kasan_slab_free+0x10a/0x190 [ 41.230524] kmem_cache_free+0x10d/0x4d0 [ 41.231146] rcu_core+0x8c8/0x2860 [ 41.231684] __do_softirq+0x1b7/0x7d4 [ 41.232268] [ 41.232528] Last potentially related work creation: [ 41.233238] kasan_save_stack+0x22/0x50 [ 41.233845] __kasan_record_aux_stack+0x8e/0xa0 [ 41.234564] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.235344] remove_vma+0x139/0x170 [ 41.235891] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.236573] do_vmi_munmap+0x1f1/0x2b0 [ 41.237164] __vm_munmap+0x138/0x3a0 [ 41.237729] __x64_sys_munmap+0x59/0x80 [ 41.238332] do_syscall_64+0x3f/0x90 [ 41.238912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.239685] [ 41.239946] The buggy address belongs to the object at ffff88800fdd1828 [ 41.239946] which belongs to the cache vm_area_struct of size 168 [ 41.241721] The buggy address is located 88 bytes inside of [ 41.241721] freed 168-byte region [ffff88800fdd1828, ffff88800fdd18d0) [ 41.243428] [ 41.243691] The buggy address belongs to the physical page: [ 41.244485] page:00000000f89cdd62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdd1 [ 41.245798] memcg:ffff888016ae6c01 [ 41.246312] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.247084] page_type: 0xffffffff() [ 41.247619] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.248729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ae6c01 [ 41.249807] page dumped because: kasan: bad access detected [ 41.250615] [ 41.250877] Memory state around the buggy address: [ 41.251574] ffff88800fdd1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.252596] ffff88800fdd1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.253609] >ffff88800fdd1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.254650] ^ [ 41.255151] ffff88800fdd1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.256186] ffff88800fdd1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 41.257203] ================================================================== [ 41.258844] Disabling lock debugging due to kernel taint [ 43.517402] BUG: Bad rss-counter state mm:00000000d0dff67c type:MM_FILEPAGES val:33 [ 43.518647] BUG: Bad rss-counter state mm:00000000d0dff67c type:MM_ANONPAGES val:22 [ 43.959825] BUG: Bad rss-counter state mm:0000000025952ee6 type:MM_FILEPAGES val:33 [ 43.961008] BUG: Bad rss-counter state mm:0000000025952ee6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16618' (ECDSA) to the list of known hosts. 2023/06/20 10:36:44 fuzzer started 2023/06/20 10:36:44 dialing manager at localhost:44161 2023/06/20 10:36:44 checking machine... 2023/06/20 10:36:44 checking revisions... [ 44.561930] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:36:44 testing simple program... [ 44.608797] cgroup: Unknown subsys name 'net' [ 44.704324] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:36:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010251740 RCX=ffffffff8449efda RDX=ffff888015f63680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800fd37ce0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000008 R13=ffff888019daae80 R14=0000561f4272d000 R15=0000561f427b6fff RIP=ffffffff814c0388 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe221d85900 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=0000561f42770194 CR3=0000000009a46000 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=00000000000000000000561f4222f060 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=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=00007fed00ca2ef0 CR3=0000000009d5a000 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=a7999266c4d08d9f5c4d8f33db524209 XMM02=eff9b2d0a8fce9cb000000000011f100 XMM03=2c67c8bc2e329bc3000000000011f228 XMM04=64f19b70e8d16de900000000000ae988 XMM05=af41b437443330970000000000134648 XMM06=c291bd5c70af25b90000000000133438 XMM07=fb795ef6d657705600000000001239c8 XMM08=2c67c8bc2e329bc3000000000011f228 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000