syzkaller login: [ 31.042862] BUG: Bad rss-counter state mm:0000000093da7843 type:MM_FILEPAGES val:33 [ 31.044080] BUG: Bad rss-counter state mm:0000000093da7843 type:MM_ANONPAGES val:22 [ 31.207760] ================================================================== [ 31.208885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.209925] Read of size 8 at addr ffff88800df0db38 by task sshd/219 [ 31.210808] [ 31.211031] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.211914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.212924] Call Trace: [ 31.213250] [ 31.213551] dump_stack_lvl+0x91/0xf0 [ 31.214043] print_report+0xcc/0x620 [ 31.214546] ? __virt_addr_valid+0x102/0x340 [ 31.215109] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.215741] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216392] kasan_report+0xbe/0xf0 [ 31.216870] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217501] vma_interval_tree_remove+0xc75/0xec0 [ 31.218111] vma_prepare+0xc54/0x11a0 [ 31.218596] __split_vma+0x5af/0x950 [ 31.219068] ? __pfx___split_vma+0x10/0x10 [ 31.219608] ? find_held_lock+0x2c/0x110 [ 31.220127] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.220710] ? lock_is_held_type+0x9f/0x120 [ 31.221256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.221861] ? mtree_range_walk+0x632/0x900 [ 31.222416] ? mas_walk+0x5c7/0x7c0 [ 31.222893] do_vmi_munmap+0x1f1/0x2b0 [ 31.223388] mmap_region+0x1f9/0x2660 [ 31.223868] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.224399] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.225122] ? __pfx_lock_acquire+0x10/0x10 [ 31.225665] ? __pfx_mmap_region+0x10/0x10 [ 31.226190] ? security_mmap_addr+0x7d/0xa0 [ 31.226723] ? get_unmapped_area+0x1f5/0x3f0 [ 31.227285] do_mmap+0x854/0xf00 [ 31.227721] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.228230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.228810] ksys_mmap_pgoff+0x3af/0x500 [ 31.229334] do_syscall_64+0x3f/0x90 [ 31.229820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230489] RIP: 0033:0x7f0753331d82 [ 31.230951] 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 [ 31.233122] RSP: 002b:00007fffc8a1b718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.234041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0753331d82 [ 31.234895] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f075276b000 [ 31.235758] RBP: 00007f075276b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.236616] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f72718af70 [ 31.237472] R13: 00007fffc8a1b730 R14: 00007fffc8a1b760 R15: 00007fffc8a1bac0 [ 31.238339] [ 31.238633] [ 31.238854] Allocated by task 212: [ 31.239277] kasan_save_stack+0x22/0x50 [ 31.239790] kasan_set_track+0x25/0x30 [ 31.240289] __kasan_slab_alloc+0x59/0x70 [ 31.240826] kmem_cache_alloc+0x16b/0x370 [ 31.241344] vm_area_dup+0x20/0x160 [ 31.241799] __split_vma+0x170/0x950 [ 31.242261] split_vma+0xc6/0x110 [ 31.242711] mprotect_fixup+0x8d2/0xb30 [ 31.243216] do_mprotect_pkey+0x87e/0xd40 [ 31.243738] __x64_sys_mprotect+0x78/0xc0 [ 31.244265] do_syscall_64+0x3f/0x90 [ 31.244750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245404] [ 31.245620] Freed by task 202: [ 31.246018] kasan_save_stack+0x22/0x50 [ 31.246530] kasan_set_track+0x25/0x30 [ 31.247032] kasan_save_free_info+0x2b/0x50 [ 31.247580] __kasan_slab_free+0x10a/0x190 [ 31.248116] kmem_cache_free+0x10d/0x4d0 [ 31.248658] rcu_core+0x8c8/0x2860 [ 31.249109] __do_softirq+0x1b7/0x7d4 [ 31.249599] [ 31.249817] Last potentially related work creation: [ 31.250433] kasan_save_stack+0x22/0x50 [ 31.250936] __kasan_record_aux_stack+0x8e/0xa0 [ 31.251519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.252175] remove_vma+0x139/0x170 [ 31.252640] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.253201] do_vmi_munmap+0x1f1/0x2b0 [ 31.253698] __vm_munmap+0x138/0x3a0 [ 31.254165] __x64_sys_munmap+0x59/0x80 [ 31.254672] do_syscall_64+0x3f/0x90 [ 31.255145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255796] [ 31.256010] Second to last potentially related work creation: [ 31.256723] kasan_save_stack+0x22/0x50 [ 31.257235] __kasan_record_aux_stack+0x8e/0xa0 [ 31.257809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.258459] remove_vma+0x139/0x170 [ 31.258916] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.259472] do_vmi_munmap+0x1f1/0x2b0 [ 31.259957] mmap_region+0x1f9/0x2660 [ 31.260447] do_mmap+0x854/0xf00 [ 31.260887] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.261374] ksys_mmap_pgoff+0x3af/0x500 [ 31.261884] do_syscall_64+0x3f/0x90 [ 31.262364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.263015] [ 31.263228] The buggy address belongs to the object at ffff88800df0dae0 [ 31.263228] which belongs to the cache vm_area_struct of size 168 [ 31.264700] The buggy address is located 88 bytes inside of [ 31.264700] freed 168-byte region [ffff88800df0dae0, ffff88800df0db88) [ 31.266111] [ 31.266325] The buggy address belongs to the physical page: [ 31.266979] page:000000002fc5c05f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf0d [ 31.268068] memcg:ffff88800f7dd301 [ 31.268514] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.269178] page_type: 0xffffffff() [ 31.269639] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.270575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7dd301 [ 31.271488] page dumped because: kasan: bad access detected [ 31.272149] [ 31.272368] Memory state around the buggy address: [ 31.272955] ffff88800df0da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.273825] ffff88800df0da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.274705] >ffff88800df0db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.275569] ^ [ 31.276186] ffff88800df0db80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.277062] ffff88800df0dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.277931] ================================================================== [ 31.279285] Disabling lock debugging due to kernel taint [ 33.284281] BUG: Bad rss-counter state mm:00000000ec6d9019 type:MM_FILEPAGES val:33 [ 33.285631] BUG: Bad rss-counter state mm:00000000ec6d9019 type:MM_ANONPAGES val:22 [ 33.704593] BUG: Bad rss-counter state mm:00000000588c9a9a type:MM_FILEPAGES val:33 [ 33.706338] BUG: Bad rss-counter state mm:00000000588c9a9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58701' (ECDSA) to the list of known hosts. 2023/06/21 00:18:34 fuzzer started 2023/06/21 00:18:35 dialing manager at localhost:36067 2023/06/21 00:18:35 checking machine... 2023/06/21 00:18:35 checking revisions... [ 34.378034] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:18:35 testing simple program... [ 34.431725] cgroup: Unknown subsys name 'net' [ 34.482808] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:18:34 Registers: info registers vcpu 0 RAX=0000000000000009 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d9fd01 RSI=ffff888008d9fd38 RDI=ffff888008d9fd38 RBP=ffff888008d9f9d0 RSP=ffff888008d9f900 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fd38 R15=ffff888008d9f978 RIP=ffffffff8112fbf3 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 =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=00007f221e9ed0b0 CR3=000000001967e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800c4bf400 RCX=ffffffff8186411a RDX=ffff8880146651c0 RSI=0000000000000000 RDI=0000000000000005 RBP=000000000000005a RSP=ffff888018457d60 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=00000000494d801e R13=00007fa6fc023050 R14=1ffff1100308afb2 R15=ffff888018457ec8 RIP=ffffffff814c027c 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 00007fa70bb0b700 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=00007f03c6520330 CR3=000000000e99e000 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=2034333a38313a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a38313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000