syzkaller login: [ 30.569568] BUG: Bad rss-counter state mm:000000002c2d7ad5 type:MM_FILEPAGES val:33 [ 30.571422] BUG: Bad rss-counter state mm:000000002c2d7ad5 type:MM_ANONPAGES val:22 [ 30.720007] ================================================================== [ 30.720911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.721849] Read of size 8 at addr ffff88800fe88798 by task sshd/220 [ 30.722612] [ 30.722827] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.723856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.724845] Call Trace: [ 30.725163] [ 30.725445] dump_stack_lvl+0x91/0xf0 [ 30.725931] print_report+0xcc/0x620 [ 30.726408] ? __virt_addr_valid+0x102/0x340 [ 30.726949] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727596] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728206] kasan_report+0xbe/0xf0 [ 30.728683] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729304] vma_interval_tree_remove+0xc75/0xec0 [ 30.729898] vma_prepare+0xc54/0x11a0 [ 30.730379] __split_vma+0x5af/0x950 [ 30.730848] ? __pfx___split_vma+0x10/0x10 [ 30.731384] ? find_held_lock+0x2c/0x110 [ 30.731900] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.732460] ? lock_is_held_type+0x9f/0x120 [ 30.732992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.733592] ? mtree_range_walk+0x632/0x900 [ 30.734140] ? mas_walk+0x5c7/0x7c0 [ 30.734615] do_vmi_munmap+0x1f1/0x2b0 [ 30.735110] mmap_region+0x1f9/0x2660 [ 30.735594] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.736100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.736811] ? __pfx_lock_acquire+0x10/0x10 [ 30.737341] ? __pfx_mmap_region+0x10/0x10 [ 30.737865] ? security_mmap_addr+0x7d/0xa0 [ 30.738453] ? get_unmapped_area+0x1f5/0x3f0 [ 30.739031] do_mmap+0x854/0xf00 [ 30.739497] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.740003] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.740561] ksys_mmap_pgoff+0x3af/0x500 [ 30.741073] do_syscall_64+0x3f/0x90 [ 30.741555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.742191] RIP: 0033:0x7f34fc18dd82 [ 30.742655] 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 [ 30.744789] RSP: 002b:00007fffc822a128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.745707] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34fc18dd82 [ 30.746580] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34fb5c7000 [ 30.747467] RBP: 00007f34fb5c7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.748345] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564256592ec0 [ 30.749207] R13: 00007fffc822a140 R14: 00007fffc822a170 R15: 00007fffc822a4d0 [ 30.750081] [ 30.750378] [ 30.750597] Allocated by task 213: [ 30.751045] kasan_save_stack+0x22/0x50 [ 30.751559] kasan_set_track+0x25/0x30 [ 30.752061] __kasan_slab_alloc+0x59/0x70 [ 30.752603] kmem_cache_alloc+0x16b/0x370 [ 30.753128] vm_area_dup+0x20/0x160 [ 30.753592] __split_vma+0x170/0x950 [ 30.754061] split_vma+0xc6/0x110 [ 30.754509] mprotect_fixup+0x8d2/0xb30 [ 30.755020] do_mprotect_pkey+0x87e/0xd40 [ 30.755559] __x64_sys_mprotect+0x78/0xc0 [ 30.756087] do_syscall_64+0x3f/0x90 [ 30.756573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757230] [ 30.757457] Freed by task 13: [ 30.757852] kasan_save_stack+0x22/0x50 [ 30.758360] kasan_set_track+0x25/0x30 [ 30.758864] kasan_save_free_info+0x2b/0x50 [ 30.759431] __kasan_slab_free+0x10a/0x190 [ 30.759976] kmem_cache_free+0x10d/0x4d0 [ 30.760497] rcu_core+0x8c8/0x2860 [ 30.760952] __do_softirq+0x1b7/0x7d4 [ 30.761438] [ 30.761661] Last potentially related work creation: [ 30.762259] kasan_save_stack+0x22/0x50 [ 30.762766] __kasan_record_aux_stack+0x8e/0xa0 [ 30.763358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.764009] remove_vma+0x139/0x170 [ 30.764484] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.765084] do_vmi_munmap+0x1f1/0x2b0 [ 30.765580] __vm_munmap+0x138/0x3a0 [ 30.766057] __x64_sys_munmap+0x59/0x80 [ 30.766559] do_syscall_64+0x3f/0x90 [ 30.767056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767722] [ 30.767944] The buggy address belongs to the object at ffff88800fe88740 [ 30.767944] which belongs to the cache vm_area_struct of size 168 [ 30.769462] The buggy address is located 88 bytes inside of [ 30.769462] freed 168-byte region [ffff88800fe88740, ffff88800fe887e8) [ 30.770896] [ 30.771146] The buggy address belongs to the physical page: [ 30.771832] page:000000009eee5757 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe88 [ 30.772935] memcg:ffff888019bc7101 [ 30.773367] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.774033] page_type: 0xffffffff() [ 30.774493] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.775449] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bc7101 [ 30.776379] page dumped because: kasan: bad access detected [ 30.777051] [ 30.777270] Memory state around the buggy address: [ 30.777860] ffff88800fe88680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.778746] ffff88800fe88700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.779682] >ffff88800fe88780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.780568] ^ [ 30.781074] ffff88800fe88800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.781955] ffff88800fe88880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.782831] ================================================================== [ 30.783871] Disabling lock debugging due to kernel taint [ 33.243465] BUG: Bad rss-counter state mm:0000000069cb8723 type:MM_FILEPAGES val:33 [ 33.244650] BUG: Bad rss-counter state mm:0000000069cb8723 type:MM_ANONPAGES val:22 [ 33.624604] BUG: Bad rss-counter state mm:00000000d23b89e8 type:MM_FILEPAGES val:33 [ 33.625783] BUG: Bad rss-counter state mm:00000000d23b89e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3205' (ECDSA) to the list of known hosts. 2023/06/21 02:09:09 fuzzer started 2023/06/21 02:09:10 dialing manager at localhost:36067 2023/06/21 02:09:10 checking machine... 2023/06/21 02:09:10 checking revisions... [ 34.351522] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:09:10 testing simple program... [ 34.396874] cgroup: Unknown subsys name 'net' [ 34.448782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:09:09 Registers: info registers vcpu 0 RAX=ffffffff83c208fc RBX=0000000000000001 RCX=ffffffff863b941c RDX=dffffc0000000000 RSI=ffff8880068379b8 RDI=1ffff11000d06eaf RBP=ffff888006837578 RSP=ffff8880068374b0 R8 =ffffffff863b9420 R9 =ffff888006837560 R10=0000000000038001 R11=000000000008b92e R12=ffff888006837580 R13=ffff888006837568 R14=ffff8880068379c0 R15=ffff888006837520 RIP=ffffffff81131061 RFL=00000216 [----AP-] 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 00007f5dccd32900 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=00007f5dcc185a40 CR3=000000000f254000 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=a59b0c2d75104b943743be8a84466e22 XMM02=ec2efd57dc4c00df000000000011c4c0 XMM03=a95c8293901324a1000000000011c590 XMM04=86a78931f5fc374e00000000000ae988 XMM05=6156009fce290b610000000000134238 XMM06=4fda316b135da52b0000000000133028 XMM07=fb795ef6d65770560000000000123310 XMM08=2c67c8bc2e329bc3000000000011c530 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000055ac17809b20 RBX=000055ac17826f70 RCX=0000000000000009 RDX=0000000000000001 RSI=000055ac17835de9 RDI=000055ac17809b20 RBP=00007ffce6e22c40 RSP=00007ffce6e22bd8 R8 =000055ac17835de9 R9 =00007f6d11a7dbe0 R10=0000000000000100 R11=0000000000000246 R12=0000000000000001 R13=000055ac17835de9 R14=0000000000000001 R15=0000000000000000 RIP=00007f6d11a21b1d RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6d114cb900 00000000 00000000 GS =0000 0000000000000000 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=00007ffce6e1d000 CR3=000000001ce86000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000ff00ffff0000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=73657909454d4f485f544c5541464544 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffff00ffffffffffffffffffffffff XMM08=00000000202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000