syzkaller login: [ 30.838377] BUG: Bad rss-counter state mm:000000003c48fc16 type:MM_FILEPAGES val:33 [ 30.840186] BUG: Bad rss-counter state mm:000000003c48fc16 type:MM_ANONPAGES val:22 [ 31.009075] ================================================================== [ 31.010086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.011099] Read of size 8 at addr ffff88800f2255c8 by task sshd/220 [ 31.011884] [ 31.012104] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.013023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.014102] Call Trace: [ 31.014451] [ 31.014749] dump_stack_lvl+0x91/0xf0 [ 31.015269] print_report+0xcc/0x620 [ 31.015782] ? __virt_addr_valid+0x102/0x340 [ 31.016350] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.016978] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.017632] kasan_report+0xbe/0xf0 [ 31.018167] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.018812] vma_interval_tree_remove+0xc75/0xec0 [ 31.019440] vma_prepare+0xc54/0x11a0 [ 31.019931] __split_vma+0x5af/0x950 [ 31.020413] ? __pfx___split_vma+0x10/0x10 [ 31.020957] ? find_held_lock+0x2c/0x110 [ 31.021514] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.022135] ? lock_is_held_type+0x9f/0x120 [ 31.022690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.023313] ? mtree_range_walk+0x632/0x900 [ 31.023877] ? mas_walk+0x5c7/0x7c0 [ 31.024370] do_vmi_munmap+0x1f1/0x2b0 [ 31.024884] mmap_region+0x1f9/0x2660 [ 31.025416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.026005] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.026742] ? __pfx_lock_acquire+0x10/0x10 [ 31.027287] ? __pfx_mmap_region+0x10/0x10 [ 31.027838] ? security_mmap_addr+0x7d/0xa0 [ 31.028394] ? get_unmapped_area+0x1f5/0x3f0 [ 31.028965] do_mmap+0x854/0xf00 [ 31.029430] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.029959] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.030572] ksys_mmap_pgoff+0x3af/0x500 [ 31.031127] do_syscall_64+0x3f/0x90 [ 31.031625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.032294] RIP: 0033:0x7f0a1bcb1d82 [ 31.032771] 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 [ 31.035003] RSP: 002b:00007ffe6bdf7418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.035944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a1bcb1d82 [ 31.036817] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a1b0eb000 [ 31.037714] RBP: 00007f0a1b0eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.038577] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c661c81b20 [ 31.039472] R13: 00007ffe6bdf7430 R14: 00007ffe6bdf7460 R15: 00007ffe6bdf77c0 [ 31.040383] [ 31.040692] [ 31.040920] Allocated by task 213: [ 31.041397] kasan_save_stack+0x22/0x50 [ 31.041939] kasan_set_track+0x25/0x30 [ 31.042453] __kasan_slab_alloc+0x59/0x70 [ 31.043026] kmem_cache_alloc+0x16b/0x370 [ 31.043562] vm_area_dup+0x20/0x160 [ 31.044033] __split_vma+0x170/0x950 [ 31.044532] split_vma+0xc6/0x110 [ 31.044984] mprotect_fixup+0x8d2/0xb30 [ 31.045518] do_mprotect_pkey+0x87e/0xd40 [ 31.046049] __x64_sys_mprotect+0x78/0xc0 [ 31.046590] do_syscall_64+0x3f/0x90 [ 31.047135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.047814] [ 31.048045] Freed by task 213: [ 31.048465] kasan_save_stack+0x22/0x50 [ 31.049001] kasan_set_track+0x25/0x30 [ 31.049545] kasan_save_free_info+0x2b/0x50 [ 31.050091] __kasan_slab_free+0x10a/0x190 [ 31.050641] kmem_cache_free+0x10d/0x4d0 [ 31.051195] rcu_core+0x8c8/0x2860 [ 31.051651] __do_softirq+0x1b7/0x7d4 [ 31.052139] [ 31.052359] Last potentially related work creation: [ 31.052956] kasan_save_stack+0x22/0x50 [ 31.053493] __kasan_record_aux_stack+0x8e/0xa0 [ 31.054086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.054747] remove_vma+0x139/0x170 [ 31.055244] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.055820] do_vmi_munmap+0x1f1/0x2b0 [ 31.056318] __vm_munmap+0x138/0x3a0 [ 31.056799] __x64_sys_munmap+0x59/0x80 [ 31.057308] do_syscall_64+0x3f/0x90 [ 31.057832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058505] [ 31.058726] The buggy address belongs to the object at ffff88800f225570 [ 31.058726] which belongs to the cache vm_area_struct of size 168 [ 31.060309] The buggy address is located 88 bytes inside of [ 31.060309] freed 168-byte region [ffff88800f225570, ffff88800f225618) [ 31.061844] [ 31.062063] The buggy address belongs to the physical page: [ 31.062782] page:00000000d27e5208 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf225 [ 31.063966] memcg:ffff88800f206401 [ 31.064419] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.065139] page_type: 0xffffffff() [ 31.065634] raw: 0100000000000200 ffff88800879fc80 ffffea00003a72c0 dead000000000007 [ 31.066586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f206401 [ 31.067578] page dumped because: kasan: bad access detected [ 31.068290] [ 31.068515] Memory state around the buggy address: [ 31.069139] ffff88800f225480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.070080] ffff88800f225500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.071035] >ffff88800f225580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.071956] ^ [ 31.072673] ffff88800f225600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.073623] ffff88800f225680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.074543] ================================================================== [ 31.075818] Disabling lock debugging due to kernel taint [ 33.043015] BUG: Bad rss-counter state mm:0000000079847c63 type:MM_FILEPAGES val:33 [ 33.044021] BUG: Bad rss-counter state mm:0000000079847c63 type:MM_ANONPAGES val:22 [ 33.485008] BUG: Bad rss-counter state mm:00000000f549cf43 type:MM_FILEPAGES val:33 [ 33.486623] BUG: Bad rss-counter state mm:00000000f549cf43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15072' (ECDSA) to the list of known hosts. 2023/06/20 05:52:27 fuzzer started 2023/06/20 05:52:28 dialing manager at localhost:44161 2023/06/20 05:52:28 checking machine... 2023/06/20 05:52:28 checking revisions... [ 34.219629] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:52:28 testing simple program... [ 34.283351] cgroup: Unknown subsys name 'net' [ 34.321472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:52:27 Registers: info registers vcpu 0 RAX=1ffffffff0c12cd8 RBX=0000000000000001 RCX=ffffffff860966c0 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff860966c2 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860966c4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000607e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800f0670d8 R15=ffff88806ce09a98 RIP=ffffffff811311c7 RFL=00000216 [----AP-] 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 00007f76e2340900 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=00007f76e28f7618 CR3=000000000ef1e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007f7a395b4000 CR3=000000000d64a000 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=2037323a32353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a32353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000