syzkaller login: [ 51.907711] BUG: Bad rss-counter state mm:00000000a6e5547a type:MM_FILEPAGES val:33 [ 51.908969] BUG: Bad rss-counter state mm:00000000a6e5547a type:MM_ANONPAGES val:22 [ 51.947630] ================================================================== [ 51.948580] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.949529] Read of size 8 at addr ffff888018d8d880 by task sshd/219 [ 51.950375] [ 51.950594] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.951461] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.952438] Call Trace: [ 51.952760] [ 51.953075] dump_stack_lvl+0x91/0xf0 [ 51.953565] print_report+0xcc/0x620 [ 51.954048] ? __virt_addr_valid+0x102/0x340 [ 51.954589] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.955212] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.955823] kasan_report+0xbe/0xf0 [ 51.956299] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.956936] vma_interval_tree_remove+0xc75/0xec0 [ 51.957549] vma_prepare+0xc54/0x11a0 [ 51.958032] __split_vma+0x5af/0x950 [ 51.958503] ? __pfx___split_vma+0x10/0x10 [ 51.959032] ? find_held_lock+0x2c/0x110 [ 51.959555] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.960126] ? lock_is_held_type+0x9f/0x120 [ 51.960664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.961287] ? mtree_range_walk+0x632/0x900 [ 51.961837] ? mas_walk+0x5c7/0x7c0 [ 51.962311] do_vmi_munmap+0x1f1/0x2b0 [ 51.962801] mmap_region+0x1f9/0x2660 [ 51.963283] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.963792] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.964514] ? __pfx_lock_acquire+0x10/0x10 [ 51.965049] ? __pfx_mmap_region+0x10/0x10 [ 51.965579] ? security_mmap_addr+0x7d/0xa0 [ 51.966105] ? get_unmapped_area+0x1f5/0x3f0 [ 51.966656] do_mmap+0x854/0xf00 [ 51.967089] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.967584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.968144] ksys_mmap_pgoff+0x3af/0x500 [ 51.968650] do_syscall_64+0x3f/0x90 [ 51.969132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.969778] RIP: 0033:0x7fe51233bd82 [ 51.970225] 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 [ 51.972326] RSP: 002b:00007ffd168b8868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.973234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe51233bd82 [ 51.974073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe511775000 [ 51.974911] RBP: 00007fe511775000 R08: 0000000000000009 R09: 0000000000001000 [ 51.975751] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b1fe19d90 [ 51.976586] R13: 00007ffd168b8880 R14: 00007ffd168b88b0 R15: 00007ffd168b8c10 [ 51.977444] [ 51.977734] [ 51.977950] Allocated by task 212: [ 51.978388] kasan_save_stack+0x22/0x50 [ 51.978894] kasan_set_track+0x25/0x30 [ 51.979388] __kasan_slab_alloc+0x59/0x70 [ 51.979910] kmem_cache_alloc+0x16b/0x370 [ 51.980430] vm_area_dup+0x20/0x160 [ 51.980902] __split_vma+0x170/0x950 [ 51.981370] split_vma+0xc6/0x110 [ 51.981811] mprotect_fixup+0x8d2/0xb30 [ 51.982316] do_mprotect_pkey+0x87e/0xd40 [ 51.982839] __x64_sys_mprotect+0x78/0xc0 [ 51.983366] do_syscall_64+0x3f/0x90 [ 51.983849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.984492] [ 51.984708] Freed by task 212: [ 51.985109] kasan_save_stack+0x22/0x50 [ 51.985616] kasan_set_track+0x25/0x30 [ 51.986110] kasan_save_free_info+0x2b/0x50 [ 51.986644] __kasan_slab_free+0x10a/0x190 [ 51.987175] kmem_cache_free+0x10d/0x4d0 [ 51.987717] rcu_core+0x8c8/0x2860 [ 51.988162] __do_softirq+0x1b7/0x7d4 [ 51.988640] [ 51.988856] Last potentially related work creation: [ 51.989448] kasan_save_stack+0x22/0x50 [ 51.989952] __kasan_record_aux_stack+0x8e/0xa0 [ 51.990533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.991169] remove_vma+0x139/0x170 [ 51.991622] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.992184] do_vmi_munmap+0x1f1/0x2b0 [ 51.992673] __vm_munmap+0x138/0x3a0 [ 51.993166] __x64_sys_munmap+0x59/0x80 [ 51.993674] do_syscall_64+0x3f/0x90 [ 51.994153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.994797] [ 51.995017] The buggy address belongs to the object at ffff888018d8d828 [ 51.995017] which belongs to the cache vm_area_struct of size 168 [ 51.996482] The buggy address is located 88 bytes inside of [ 51.996482] freed 168-byte region [ffff888018d8d828, ffff888018d8d8d0) [ 51.997882] [ 51.998098] The buggy address belongs to the physical page: [ 51.998760] page:0000000055ceea8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d8d [ 51.999850] memcg:ffff88801653f601 [ 52.000269] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.000909] page_type: 0xffffffff() [ 52.001363] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.002279] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801653f601 [ 52.003176] page dumped because: kasan: bad access detected [ 52.003828] [ 52.004045] Memory state around the buggy address: [ 52.004618] ffff888018d8d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 52.005501] ffff888018d8d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 52.006360] >ffff888018d8d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 52.007215] ^ [ 52.007622] ffff888018d8d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.008478] ffff888018d8d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 52.009333] ================================================================== [ 52.010489] Disabling lock debugging due to kernel taint [ 54.204634] BUG: Bad rss-counter state mm:000000008cf46593 type:MM_FILEPAGES val:33 [ 54.205807] BUG: Bad rss-counter state mm:000000008cf46593 type:MM_ANONPAGES val:22 [ 54.573422] BUG: Bad rss-counter state mm:0000000057346e52 type:MM_FILEPAGES val:33 [ 54.574343] BUG: Bad rss-counter state mm:0000000057346e52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27509' (ECDSA) to the list of known hosts. 2023/06/19 18:27:25 fuzzer started 2023/06/19 18:27:25 dialing manager at localhost:44161 2023/06/19 18:27:25 checking machine... 2023/06/19 18:27:25 checking revisions... [ 55.283241] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:27:25 testing simple program... [ 55.333591] cgroup: Unknown subsys name 'net' [ 55.378703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:03 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888015f4f9a8 RSI=ffff888015f4f970 RDI=ffff888015f4f530 RBP=ffff888015f4f5b8 RSP=ffff888015f4f520 R8 =0000000000000001 R9 =ffff888015f4f560 R10=0000000000038001 R11=000000000008b7e4 R12=ffff888015f4f5e8 R13=0000000000000000 R14=ffff88800dc551c0 R15=0000000000000014 RIP=ffffffff810bd057 RFL=00000286 [--S--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 00007fef9e64f900 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=00007ffebf2cd000 CR3=0000000017ef0000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f404a91e018 CR3=0000000018c7a000 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=2034323a37323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a37323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000