syzkaller login: [ 30.538576] BUG: Bad rss-counter state mm:00000000e7be6953 type:MM_FILEPAGES val:33 [ 30.540349] BUG: Bad rss-counter state mm:00000000e7be6953 type:MM_ANONPAGES val:22 [ 30.707765] ================================================================== [ 30.708614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.709559] Read of size 8 at addr ffff88800dac1b38 by task sshd/219 [ 30.710274] [ 30.710482] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.711395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.712303] Call Trace: [ 30.712608] [ 30.712891] dump_stack_lvl+0x91/0xf0 [ 30.713689] print_report+0xcc/0x620 [ 30.714395] ? __virt_addr_valid+0x102/0x340 [ 30.715207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716114] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717019] kasan_report+0xbe/0xf0 [ 30.717665] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718427] vma_interval_tree_remove+0xc75/0xec0 [ 30.719153] vma_prepare+0xc54/0x11a0 [ 30.719741] __split_vma+0x5af/0x950 [ 30.720311] ? __pfx___split_vma+0x10/0x10 [ 30.720949] ? find_held_lock+0x2c/0x110 [ 30.721611] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.722303] ? lock_is_held_type+0x9f/0x120 [ 30.722953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.723689] ? mtree_range_walk+0x632/0x900 [ 30.724353] ? mas_walk+0x5c7/0x7c0 [ 30.724928] do_vmi_munmap+0x1f1/0x2b0 [ 30.725528] mmap_region+0x1f9/0x2660 [ 30.726108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.726733] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.727613] ? __pfx_lock_acquire+0x10/0x10 [ 30.728265] ? __pfx_mmap_region+0x10/0x10 [ 30.728914] ? security_mmap_addr+0x7d/0xa0 [ 30.729569] ? get_unmapped_area+0x1f5/0x3f0 [ 30.730244] do_mmap+0x854/0xf00 [ 30.730774] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.731374] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.732053] ksys_mmap_pgoff+0x3af/0x500 [ 30.732668] do_syscall_64+0x3f/0x90 [ 30.733261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734047] RIP: 0033:0x7f96735add82 [ 30.734616] 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 [ 30.737204] RSP: 002b:00007ffd69c85678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.738065] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96735add82 [ 30.738869] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96729e7000 [ 30.739661] RBP: 00007f96729e7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.740450] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edf226df70 [ 30.741262] R13: 00007ffd69c85690 R14: 00007ffd69c856c0 R15: 00007ffd69c85a20 [ 30.742072] [ 30.742346] [ 30.742551] Allocated by task 212: [ 30.742955] kasan_save_stack+0x22/0x50 [ 30.743429] kasan_set_track+0x25/0x30 [ 30.743899] __kasan_slab_alloc+0x59/0x70 [ 30.744389] kmem_cache_alloc+0x16b/0x370 [ 30.744886] vm_area_dup+0x20/0x160 [ 30.745348] __split_vma+0x170/0x950 [ 30.745787] split_vma+0xc6/0x110 [ 30.746206] mprotect_fixup+0x8d2/0xb30 [ 30.746680] do_mprotect_pkey+0x87e/0xd40 [ 30.747170] __x64_sys_mprotect+0x78/0xc0 [ 30.747665] do_syscall_64+0x3f/0x90 [ 30.748117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748734] [ 30.748945] Freed by task 202: [ 30.749330] kasan_save_stack+0x22/0x50 [ 30.749833] kasan_set_track+0x25/0x30 [ 30.750320] kasan_save_free_info+0x2b/0x50 [ 30.750845] __kasan_slab_free+0x10a/0x190 [ 30.751373] kmem_cache_free+0x10d/0x4d0 [ 30.751878] rcu_core+0x8c8/0x2860 [ 30.752320] __do_softirq+0x1b7/0x7d4 [ 30.752796] [ 30.753006] Last potentially related work creation: [ 30.753597] kasan_save_stack+0x22/0x50 [ 30.754092] __kasan_record_aux_stack+0x8e/0xa0 [ 30.754659] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.755292] remove_vma+0x139/0x170 [ 30.755744] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.756299] do_vmi_munmap+0x1f1/0x2b0 [ 30.756788] __vm_munmap+0x138/0x3a0 [ 30.757272] __x64_sys_munmap+0x59/0x80 [ 30.757768] do_syscall_64+0x3f/0x90 [ 30.758246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758885] [ 30.759096] The buggy address belongs to the object at ffff88800dac1ae0 [ 30.759096] which belongs to the cache vm_area_struct of size 168 [ 30.760567] The buggy address is located 88 bytes inside of [ 30.760567] freed 168-byte region [ffff88800dac1ae0, ffff88800dac1b88) [ 30.761957] [ 30.762168] The buggy address belongs to the physical page: [ 30.762827] page:00000000c957a2df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdac1 [ 30.763904] memcg:ffff88800d2a4001 [ 30.764322] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.764955] page_type: 0xffffffff() [ 30.765406] raw: 0100000000000200 ffff8880087a0c80 ffffea0000407bc0 dead000000000002 [ 30.766318] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2a4001 [ 30.767217] page dumped because: kasan: bad access detected [ 30.767866] [ 30.768078] Memory state around the buggy address: [ 30.768647] ffff88800dac1a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.769504] ffff88800dac1a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.770349] >ffff88800dac1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.771201] ^ [ 30.771806] ffff88800dac1b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.772662] ffff88800dac1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.773511] ================================================================== [ 30.774485] Disabling lock debugging due to kernel taint [ 33.140706] BUG: Bad rss-counter state mm:000000009795bb4d type:MM_FILEPAGES val:33 [ 33.141472] BUG: Bad rss-counter state mm:000000009795bb4d type:MM_ANONPAGES val:22 [ 33.557047] BUG: Bad rss-counter state mm:000000003dd78b4c type:MM_FILEPAGES val:33 [ 33.558157] BUG: Bad rss-counter state mm:000000003dd78b4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45778' (ECDSA) to the list of known hosts. 2023/06/21 05:05:15 fuzzer started 2023/06/21 05:05:15 dialing manager at localhost:36067 2023/06/21 05:05:15 checking machine... 2023/06/21 05:05:15 checking revisions... [ 34.307272] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:05:15 testing simple program... [ 34.356875] cgroup: Unknown subsys name 'net' [ 34.396174] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:05:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f63a8004c90 RCX=0000560ddf721c80 RDX=0000000000000000 RSI=0000560ddf721e30 RDI=00007f63a8004c90 RBP=0000560ddf70ae00 RSP=00007f63b5968a20 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000000 R12=0000560ddf309a50 R13=00007f63b5968a70 R14=0000000000000001 R15=0000560ddf721e30 RIP=0000560ddf2bb6f1 RFL=00000202 [-------] 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 00007f63b5969700 00000000 00000000 GS =0000 0000000000000000 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=00007f1f034890b0 CR3=0000000016872000 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=2035313a35303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a35303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffdfb361e58 CR3=0000000016872000 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=35303a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363838 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000