syzkaller login: [ 83.170650] BUG: Bad rss-counter state mm:000000004b676aa3 type:MM_FILEPAGES val:33 [ 83.172416] BUG: Bad rss-counter state mm:000000004b676aa3 type:MM_ANONPAGES val:22 [ 83.330735] ================================================================== [ 83.331621] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 83.332529] Read of size 8 at addr ffff88800ef4d798 by task sshd/220 [ 83.333357] [ 83.333602] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 83.334602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 83.335559] Call Trace: [ 83.335873] [ 83.336153] dump_stack_lvl+0x91/0xf0 [ 83.336624] print_report+0xcc/0x620 [ 83.337092] ? __virt_addr_valid+0x102/0x340 [ 83.337622] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.338227] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.338832] kasan_report+0xbe/0xf0 [ 83.339304] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.339911] vma_interval_tree_remove+0xc75/0xec0 [ 83.340507] vma_prepare+0xc54/0x11a0 [ 83.340970] __split_vma+0x5af/0x950 [ 83.341431] ? __pfx___split_vma+0x10/0x10 [ 83.341947] ? find_held_lock+0x2c/0x110 [ 83.342455] do_vmi_align_munmap+0x2ba/0x11f0 [ 83.343004] ? lock_is_held_type+0x9f/0x120 [ 83.343533] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 83.344114] ? mtree_range_walk+0x632/0x900 [ 83.344672] ? mas_walk+0x5c7/0x7c0 [ 83.345190] do_vmi_munmap+0x1f1/0x2b0 [ 83.345694] mmap_region+0x1f9/0x2660 [ 83.346172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 83.346671] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 83.347366] ? __pfx_lock_acquire+0x10/0x10 [ 83.347899] ? __pfx_mmap_region+0x10/0x10 [ 83.348416] ? security_mmap_addr+0x7d/0xa0 [ 83.348931] ? get_unmapped_area+0x1f5/0x3f0 [ 83.349471] do_mmap+0x854/0xf00 [ 83.349906] vm_mmap_pgoff+0x1a6/0x3a0 [ 83.350395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 83.350942] ksys_mmap_pgoff+0x3af/0x500 [ 83.351433] do_syscall_64+0x3f/0x90 [ 83.351908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.352539] RIP: 0033:0x7f73b1b2cd82 [ 83.352984] 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 [ 83.355070] RSP: 002b:00007ffd63c49588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 83.355957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73b1b2cd82 [ 83.356882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73b0f66000 [ 83.357717] RBP: 00007f73b0f66000 R08: 0000000000000009 R09: 0000000000001000 [ 83.358540] R10: 0000000000000812 R11: 0000000000000206 R12: 000056482a491d90 [ 83.359441] R13: 00007ffd63c495a0 R14: 00007ffd63c495d0 R15: 00007ffd63c49930 [ 83.360305] [ 83.360595] [ 83.360806] Allocated by task 213: [ 83.361222] kasan_save_stack+0x22/0x50 [ 83.361715] kasan_set_track+0x25/0x30 [ 83.362194] __kasan_slab_alloc+0x59/0x70 [ 83.362700] kmem_cache_alloc+0x16b/0x370 [ 83.363208] vm_area_dup+0x20/0x160 [ 83.363661] __split_vma+0x170/0x950 [ 83.364116] split_vma+0xc6/0x110 [ 83.364574] mprotect_fixup+0x8d2/0xb30 [ 83.365072] do_mprotect_pkey+0x87e/0xd40 [ 83.365590] __x64_sys_mprotect+0x78/0xc0 [ 83.366110] do_syscall_64+0x3f/0x90 [ 83.366589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.367227] [ 83.367437] Freed by task 213: [ 83.367839] kasan_save_stack+0x22/0x50 [ 83.368357] kasan_set_track+0x25/0x30 [ 83.368857] kasan_save_free_info+0x2b/0x50 [ 83.369391] __kasan_slab_free+0x10a/0x190 [ 83.369933] kmem_cache_free+0x10d/0x4d0 [ 83.370444] rcu_core+0x8c8/0x2860 [ 83.370899] __do_softirq+0x1b7/0x7d4 [ 83.371374] [ 83.371586] Last potentially related work creation: [ 83.372177] kasan_save_stack+0x22/0x50 [ 83.372699] __kasan_record_aux_stack+0x8e/0xa0 [ 83.373272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 83.373924] remove_vma+0x139/0x170 [ 83.374376] do_vmi_align_munmap+0xd4a/0x11f0 [ 83.374933] do_vmi_munmap+0x1f1/0x2b0 [ 83.375420] __vm_munmap+0x138/0x3a0 [ 83.375888] __x64_sys_munmap+0x59/0x80 [ 83.376394] do_syscall_64+0x3f/0x90 [ 83.376880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.377521] [ 83.377736] The buggy address belongs to the object at ffff88800ef4d740 [ 83.377736] which belongs to the cache vm_area_struct of size 168 [ 83.379181] The buggy address is located 88 bytes inside of [ 83.379181] freed 168-byte region [ffff88800ef4d740, ffff88800ef4d7e8) [ 83.380587] [ 83.380803] The buggy address belongs to the physical page: [ 83.381461] page:000000001fe05562 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef4d [ 83.382545] memcg:ffff88800f0c4201 [ 83.382983] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 83.383683] page_type: 0xffffffff() [ 83.384131] raw: 0100000000000200 ffff88800879fc80 ffffea00003b75c0 dead000000000005 [ 83.385065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0c4201 [ 83.385981] page dumped because: kasan: bad access detected [ 83.386658] [ 83.386878] Memory state around the buggy address: [ 83.387466] ffff88800ef4d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 83.388340] ffff88800ef4d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 83.389200] >ffff88800ef4d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 83.390045] ^ [ 83.390538] ffff88800ef4d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 83.391390] ffff88800ef4d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 83.392231] ================================================================== [ 83.393280] Disabling lock debugging due to kernel taint [ 85.375237] BUG: Bad rss-counter state mm:00000000729e58ab type:MM_FILEPAGES val:33 [ 85.376216] BUG: Bad rss-counter state mm:00000000729e58ab type:MM_ANONPAGES val:22 [ 85.822067] BUG: Bad rss-counter state mm:000000003590f8bd type:MM_FILEPAGES val:33 [ 85.823540] BUG: Bad rss-counter state mm:000000003590f8bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13636' (ECDSA) to the list of known hosts. 2023/06/19 23:08:28 fuzzer started 2023/06/19 23:08:28 dialing manager at localhost:44161 2023/06/19 23:08:28 checking machine... 2023/06/19 23:08:28 checking revisions... [ 86.436546] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:08:28 testing simple program... [ 86.480979] cgroup: Unknown subsys name 'net' [ 86.529838] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:07:33 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11003920f8c RSP=ffff88801c907c50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856d8238 R13=ffffffff81808777 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff812d86a2 RFL=00000047 [---Z-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 00007fecc369b900 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=00007ffe863fb000 CR3=000000001828e000 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=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=00007f7f02548800 CR3=00000000197b8000 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=2037323a38303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000