syzkaller login: [ 30.575169] BUG: Bad rss-counter state mm:00000000db4cc3da type:MM_FILEPAGES val:33 [ 30.576481] BUG: Bad rss-counter state mm:00000000db4cc3da type:MM_ANONPAGES val:22 [ 30.740141] ================================================================== [ 30.741050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.741999] Read of size 8 at addr ffff88800eb7e798 by task sshd/220 [ 30.742858] [ 30.743221] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.744241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.745408] Call Trace: [ 30.745786] [ 30.746121] dump_stack_lvl+0x91/0xf0 [ 30.746711] print_report+0xcc/0x620 [ 30.747301] ? __virt_addr_valid+0x102/0x340 [ 30.747945] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748668] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749390] kasan_report+0xbe/0xf0 [ 30.749966] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750723] vma_interval_tree_remove+0xc75/0xec0 [ 30.751466] vma_prepare+0xc54/0x11a0 [ 30.752049] __split_vma+0x5af/0x950 [ 30.752624] ? __pfx___split_vma+0x10/0x10 [ 30.753266] ? find_held_lock+0x2c/0x110 [ 30.753892] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754583] ? lock_is_held_type+0x9f/0x120 [ 30.755253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755856] ? mtree_range_walk+0x632/0x900 [ 30.756400] ? mas_walk+0x5c7/0x7c0 [ 30.756872] do_vmi_munmap+0x1f1/0x2b0 [ 30.757361] mmap_region+0x1f9/0x2660 [ 30.757842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.759069] ? __pfx_lock_acquire+0x10/0x10 [ 30.759596] ? __pfx_mmap_region+0x10/0x10 [ 30.760123] ? security_mmap_addr+0x7d/0xa0 [ 30.760652] ? get_unmapped_area+0x1f5/0x3f0 [ 30.761199] do_mmap+0x854/0xf00 [ 30.761633] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.762121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.762690] ksys_mmap_pgoff+0x3af/0x500 [ 30.763203] do_syscall_64+0x3f/0x90 [ 30.763680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764330] RIP: 0033:0x7f7d124acd82 [ 30.764787] 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 [ 30.766911] RSP: 002b:00007ffdc51d21c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767811] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d124acd82 [ 30.768649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d118e6000 [ 30.769488] RBP: 00007f7d118e6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.770323] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608f25d9f70 [ 30.771176] R13: 00007ffdc51d21e0 R14: 00007ffdc51d2210 R15: 00007ffdc51d2570 [ 30.772023] [ 30.772313] [ 30.772525] Allocated by task 213: [ 30.772952] kasan_save_stack+0x22/0x50 [ 30.773461] kasan_set_track+0x25/0x30 [ 30.773957] __kasan_slab_alloc+0x59/0x70 [ 30.774482] kmem_cache_alloc+0x16b/0x370 [ 30.774998] vm_area_dup+0x20/0x160 [ 30.775451] __split_vma+0x170/0x950 [ 30.775913] split_vma+0xc6/0x110 [ 30.776351] mprotect_fixup+0x8d2/0xb30 [ 30.776851] do_mprotect_pkey+0x87e/0xd40 [ 30.777374] __x64_sys_mprotect+0x78/0xc0 [ 30.777895] do_syscall_64+0x3f/0x90 [ 30.778361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779014] [ 30.779229] Freed by task 213: [ 30.779615] kasan_save_stack+0x22/0x50 [ 30.780113] kasan_set_track+0x25/0x30 [ 30.780602] kasan_save_free_info+0x2b/0x50 [ 30.781133] __kasan_slab_free+0x10a/0x190 [ 30.781662] kmem_cache_free+0x10d/0x4d0 [ 30.782167] rcu_core+0x8c8/0x2860 [ 30.782616] __do_softirq+0x1b7/0x7d4 [ 30.783093] [ 30.783307] Last potentially related work creation: [ 30.783890] kasan_save_stack+0x22/0x50 [ 30.784388] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.785597] remove_vma+0x139/0x170 [ 30.786041] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786592] do_vmi_munmap+0x1f1/0x2b0 [ 30.787140] __vm_munmap+0x138/0x3a0 [ 30.787606] __x64_sys_munmap+0x59/0x80 [ 30.788096] do_syscall_64+0x3f/0x90 [ 30.788567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789201] [ 30.789415] The buggy address belongs to the object at ffff88800eb7e740 [ 30.789415] which belongs to the cache vm_area_struct of size 168 [ 30.790888] The buggy address is located 88 bytes inside of [ 30.790888] freed 168-byte region [ffff88800eb7e740, ffff88800eb7e7e8) [ 30.792288] [ 30.792505] The buggy address belongs to the physical page: [ 30.793168] page:0000000004c7402f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb7e [ 30.794235] memcg:ffff8880169f7c01 [ 30.794662] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.795319] page_type: 0xffffffff() [ 30.795770] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.796676] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169f7c01 [ 30.797571] page dumped because: kasan: bad access detected [ 30.798225] [ 30.798437] Memory state around the buggy address: [ 30.799037] ffff88800eb7e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.799906] ffff88800eb7e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.800758] >ffff88800eb7e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.801618] ^ [ 30.802119] ffff88800eb7e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.802977] ffff88800eb7e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.803824] ================================================================== [ 30.804816] Disabling lock debugging due to kernel taint [ 32.828349] BUG: Bad rss-counter state mm:000000002b3f4858 type:MM_FILEPAGES val:33 [ 32.829514] BUG: Bad rss-counter state mm:000000002b3f4858 type:MM_ANONPAGES val:22 [ 33.211435] BUG: Bad rss-counter state mm:00000000c2565722 type:MM_FILEPAGES val:33 [ 33.212628] BUG: Bad rss-counter state mm:00000000c2565722 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9498' (ECDSA) to the list of known hosts. 2023/06/19 15:34:00 fuzzer started 2023/06/19 15:34:00 dialing manager at localhost:44161 2023/06/19 15:34:00 checking machine... 2023/06/19 15:34:00 checking revisions... [ 33.920929] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:34:00 testing simple program... [ 33.967186] cgroup: Unknown subsys name 'net' [ 34.008799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:33:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c5ed260 RCX=ffff88800c5ed260 RDX=00000000000d0004 RSI=ffff88800c5ed260 RDI=ffff88800844f780 RBP=ffff88801658f7f8 RSP=ffff88801658f760 R8 =00000000000d0003 R9 =0000000000000000 R10=ffffea0000317b40 R11=00000000000d0004 R12=ffffea0000317b40 R13=ffff88800c5edbe0 R14=00000000000d0003 R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007fb3e78f1900 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=000055e092fc7768 CR3=0000000019e82000 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=ff0000000000ffff0000000000ff0000 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=ffffffff84506c7f RBX=0000000000000007 RCX=0000000000000001 RDX=0000000000000800 RSI=0000000000000009 RDI=ffff88801658f7b0 RBP=dffffc0000000000 RSP=ffff88801658f6c8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000009 R13=0000000000000800 R14=ffff88801658f778 R15=ffff88800c4c75f0 RIP=ffffffff813ad5f9 RFL=00000287 [--S--PC] 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 00007fb3e78f1900 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=00007fb3e7ea6650 CR3=0000000019e82000 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=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