syzkaller login: [ 31.529820] BUG: Bad rss-counter state mm:00000000b56737a3 type:MM_FILEPAGES val:33 [ 31.530979] BUG: Bad rss-counter state mm:00000000b56737a3 type:MM_ANONPAGES val:22 [ 31.584021] ================================================================== [ 31.584922] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.585976] Read of size 8 at addr ffff88800e65eed8 by task sshd/220 [ 31.586746] [ 31.586962] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.587822] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.588769] Call Trace: [ 31.589079] [ 31.589355] dump_stack_lvl+0x91/0xf0 [ 31.589856] print_report+0xcc/0x620 [ 31.590325] ? __virt_addr_valid+0x102/0x340 [ 31.590860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.591459] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.592064] kasan_report+0xbe/0xf0 [ 31.592530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.593139] vma_interval_tree_remove+0xc75/0xec0 [ 31.593752] vma_prepare+0xc54/0x11a0 [ 31.594222] __split_vma+0x5af/0x950 [ 31.594680] ? __pfx___split_vma+0x10/0x10 [ 31.595198] ? find_held_lock+0x2c/0x110 [ 31.595702] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.596250] ? lock_is_held_type+0x9f/0x120 [ 31.596772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.597373] ? mtree_range_walk+0x632/0x900 [ 31.597915] ? mas_walk+0x5c7/0x7c0 [ 31.598391] do_vmi_munmap+0x1f1/0x2b0 [ 31.598865] mmap_region+0x1f9/0x2660 [ 31.599331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.599829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.600518] ? __pfx_lock_acquire+0x10/0x10 [ 31.601033] ? __pfx_mmap_region+0x10/0x10 [ 31.601589] ? security_mmap_addr+0x7d/0xa0 [ 31.602109] ? get_unmapped_area+0x1f5/0x3f0 [ 31.602655] do_mmap+0x854/0xf00 [ 31.603086] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.603568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.604127] ksys_mmap_pgoff+0x3af/0x500 [ 31.604620] do_syscall_64+0x3f/0x90 [ 31.605082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.605739] RIP: 0033:0x7f0728b05d82 [ 31.606177] 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 [ 31.608252] RSP: 002b:00007fffcf3537e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.609149] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0728b05d82 [ 31.609990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0727f3f000 [ 31.610833] RBP: 00007f0727f3f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.611670] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce00a3dec0 [ 31.612503] R13: 00007fffcf353800 R14: 00007fffcf353830 R15: 00007fffcf353b90 [ 31.613331] [ 31.613649] [ 31.613859] Allocated by task 213: [ 31.614271] kasan_save_stack+0x22/0x50 [ 31.614763] kasan_set_track+0x25/0x30 [ 31.615247] __kasan_slab_alloc+0x59/0x70 [ 31.615757] kmem_cache_alloc+0x16b/0x370 [ 31.616266] vm_area_dup+0x20/0x160 [ 31.616710] __split_vma+0x170/0x950 [ 31.617162] split_vma+0xc6/0x110 [ 31.617610] mprotect_fixup+0x8d2/0xb30 [ 31.618101] do_mprotect_pkey+0x87e/0xd40 [ 31.618609] __x64_sys_mprotect+0x78/0xc0 [ 31.619114] do_syscall_64+0x3f/0x90 [ 31.619580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.620218] [ 31.620431] Freed by task 213: [ 31.620812] kasan_save_stack+0x22/0x50 [ 31.621301] kasan_set_track+0x25/0x30 [ 31.621811] kasan_save_free_info+0x2b/0x50 [ 31.622330] __kasan_slab_free+0x10a/0x190 [ 31.622851] kmem_cache_free+0x10d/0x4d0 [ 31.623344] rcu_core+0x8c8/0x2860 [ 31.623778] __do_softirq+0x1b7/0x7d4 [ 31.624243] [ 31.624463] Last potentially related work creation: [ 31.625028] kasan_save_stack+0x22/0x50 [ 31.625546] __kasan_record_aux_stack+0x8e/0xa0 [ 31.626112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.626751] remove_vma+0x139/0x170 [ 31.627201] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.627744] do_vmi_munmap+0x1f1/0x2b0 [ 31.628218] __vm_munmap+0x138/0x3a0 [ 31.628675] __x64_sys_munmap+0x59/0x80 [ 31.629164] do_syscall_64+0x3f/0x90 [ 31.629627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630197] [ 31.630396] The buggy address belongs to the object at ffff88800e65ee80 [ 31.630396] which belongs to the cache vm_area_struct of size 168 [ 31.631857] The buggy address is located 88 bytes inside of [ 31.631857] freed 168-byte region [ffff88800e65ee80, ffff88800e65ef28) [ 31.633220] [ 31.633441] The buggy address belongs to the physical page: [ 31.634085] page:00000000def99bcc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe65e [ 31.635154] memcg:ffff88800d615a01 [ 31.635573] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.636255] page_type: 0xffffffff() [ 31.636695] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bf100 dead000000000005 [ 31.637601] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d615a01 [ 31.638471] page dumped because: kasan: bad access detected [ 31.639123] [ 31.639334] Memory state around the buggy address: [ 31.639899] ffff88800e65ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.640725] ffff88800e65ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.641583] >ffff88800e65ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.642403] ^ [ 31.643115] ffff88800e65ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.643946] ffff88800e65ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.644774] ================================================================== [ 31.645762] Disabling lock debugging due to kernel taint [ 34.022108] BUG: Bad rss-counter state mm:0000000059e04360 type:MM_FILEPAGES val:33 [ 34.023118] BUG: Bad rss-counter state mm:0000000059e04360 type:MM_ANONPAGES val:22 [ 34.474488] BUG: Bad rss-counter state mm:00000000a4262acf type:MM_FILEPAGES val:33 [ 34.475506] BUG: Bad rss-counter state mm:00000000a4262acf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50526' (ECDSA) to the list of known hosts. 2023/06/21 10:39:45 fuzzer started 2023/06/21 10:39:46 dialing manager at localhost:36067 2023/06/21 10:39:46 checking machine... 2023/06/21 10:39:46 checking revisions... [ 35.199036] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:39:46 testing simple program... [ 35.247971] cgroup: Unknown subsys name 'net' [ 35.302963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:39:45 Registers: info registers vcpu 0 RAX=1ffffffff0c1425e RBX=0000000000000001 RCX=ffffffff860a12f6 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff860a12fa R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fec8 R15=ffff888008d9f978 RIP=ffffffff81130b73 RFL=00000213 [----A-C] 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=00007f029582f2a0 CR3=000000000dc3a000 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=2035343a39333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a39333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8608a55b RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008e379d0 RSP=ffff888008e378b8 R8 =ffffffff8608a55a R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e379b9 R15=ffff888008e37978 RIP=ffffffff81130ab5 RFL=00000293 [--S-A-C] 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=00007ffcb4efa000 CR3=0000000019c50000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000