syzkaller login: [ 31.565495] BUG: Bad rss-counter state mm:00000000b95b1ccd type:MM_FILEPAGES val:33 [ 31.566993] BUG: Bad rss-counter state mm:00000000b95b1ccd type:MM_ANONPAGES val:22 [ 31.718362] ================================================================== [ 31.719287] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.720234] Read of size 8 at addr ffff888015a5a968 by task sshd/220 [ 31.721014] [ 31.721325] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.722201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.723191] Call Trace: [ 31.723528] [ 31.723816] dump_stack_lvl+0x91/0xf0 [ 31.724312] print_report+0xcc/0x620 [ 31.724804] ? __virt_addr_valid+0x102/0x340 [ 31.725363] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.725987] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.726613] kasan_report+0xbe/0xf0 [ 31.727106] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.727736] vma_interval_tree_remove+0xc75/0xec0 [ 31.728346] vma_prepare+0xc54/0x11a0 [ 31.728862] __split_vma+0x5af/0x950 [ 31.729357] ? __pfx___split_vma+0x10/0x10 [ 31.729899] ? find_held_lock+0x2c/0x110 [ 31.730432] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.731006] ? lock_is_held_type+0x9f/0x120 [ 31.731561] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.732185] ? mtree_range_walk+0x632/0x900 [ 31.732752] ? mas_walk+0x5c7/0x7c0 [ 31.733231] do_vmi_munmap+0x1f1/0x2b0 [ 31.733730] mmap_region+0x1f9/0x2660 [ 31.734215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.734742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.735462] ? __pfx_lock_acquire+0x10/0x10 [ 31.736015] ? __pfx_mmap_region+0x10/0x10 [ 31.736557] ? security_mmap_addr+0x7d/0xa0 [ 31.737115] ? get_unmapped_area+0x1f5/0x3f0 [ 31.737667] do_mmap+0x854/0xf00 [ 31.738110] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.738617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.739187] ksys_mmap_pgoff+0x3af/0x500 [ 31.739705] do_syscall_64+0x3f/0x90 [ 31.740202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.740878] RIP: 0033:0x7f9ed355fd82 [ 31.741337] 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 [ 31.743492] RSP: 002b:00007ffd63feb2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.744410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ed355fd82 [ 31.745284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ed2999000 [ 31.746131] RBP: 00007f9ed2999000 R08: 0000000000000009 R09: 0000000000001000 [ 31.746986] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f0f5afd90 [ 31.747850] R13: 00007ffd63feb2d0 R14: 00007ffd63feb300 R15: 00007ffd63feb660 [ 31.748712] [ 31.749019] [ 31.749238] Allocated by task 213: [ 31.749668] kasan_save_stack+0x22/0x50 [ 31.750187] kasan_set_track+0x25/0x30 [ 31.750691] __kasan_slab_alloc+0x59/0x70 [ 31.751231] kmem_cache_alloc+0x16b/0x370 [ 31.751752] vm_area_dup+0x20/0x160 [ 31.752216] __split_vma+0x170/0x950 [ 31.752695] split_vma+0xc6/0x110 [ 31.753151] mprotect_fixup+0x8d2/0xb30 [ 31.753661] do_mprotect_pkey+0x87e/0xd40 [ 31.754191] __x64_sys_mprotect+0x78/0xc0 [ 31.754723] do_syscall_64+0x3f/0x90 [ 31.755202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755849] [ 31.756069] Freed by task 210: [ 31.756464] kasan_save_stack+0x22/0x50 [ 31.756990] kasan_set_track+0x25/0x30 [ 31.757488] kasan_save_free_info+0x2b/0x50 [ 31.758023] __kasan_slab_free+0x10a/0x190 [ 31.758556] kmem_cache_free+0x10d/0x4d0 [ 31.759070] rcu_core+0x8c8/0x2860 [ 31.759523] __do_softirq+0x1b7/0x7d4 [ 31.760006] [ 31.760230] Last potentially related work creation: [ 31.760828] kasan_save_stack+0x22/0x50 [ 31.761335] __kasan_record_aux_stack+0x8e/0xa0 [ 31.761915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.762564] remove_vma+0x139/0x170 [ 31.763023] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.763597] do_vmi_munmap+0x1f1/0x2b0 [ 31.764103] __vm_munmap+0x138/0x3a0 [ 31.764586] __x64_sys_munmap+0x59/0x80 [ 31.765108] do_syscall_64+0x3f/0x90 [ 31.765590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.766237] [ 31.766452] The buggy address belongs to the object at ffff888015a5a910 [ 31.766452] which belongs to the cache vm_area_struct of size 168 [ 31.767949] The buggy address is located 88 bytes inside of [ 31.767949] freed 168-byte region [ffff888015a5a910, ffff888015a5a9b8) [ 31.769394] [ 31.769615] The buggy address belongs to the physical page: [ 31.770278] page:000000006b055b31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a5a [ 31.771375] memcg:ffff88800c4e1101 [ 31.771803] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.772452] page_type: 0xffffffff() [ 31.772918] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.773915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4e1101 [ 31.774825] page dumped because: kasan: bad access detected [ 31.775488] [ 31.775701] Memory state around the buggy address: [ 31.776283] ffff888015a5a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.777157] ffff888015a5a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.778017] >ffff888015a5a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.778869] ^ [ 31.779650] ffff888015a5a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.780509] ffff888015a5aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.781376] ================================================================== [ 31.782426] Disabling lock debugging due to kernel taint [ 33.651905] BUG: Bad rss-counter state mm:00000000e4ab44f6 type:MM_FILEPAGES val:33 [ 33.652552] BUG: Bad rss-counter state mm:00000000e4ab44f6 type:MM_ANONPAGES val:22 [ 34.090296] BUG: Bad rss-counter state mm:00000000b17a6046 type:MM_FILEPAGES val:33 [ 34.091421] BUG: Bad rss-counter state mm:00000000b17a6046 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47118' (ECDSA) to the list of known hosts. 2023/06/19 19:43:45 fuzzer started 2023/06/19 19:43:45 dialing manager at localhost:44161 2023/06/19 19:43:45 checking machine... 2023/06/19 19:43:45 checking revisions... [ 34.791993] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:43:46 testing simple program... [ 34.831837] cgroup: Unknown subsys name 'net' [ 34.871394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:43:44 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff110033b7f6f RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888019dbfb68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888015d69e20 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---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 00007fd824179900 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=00007f62dd565a10 CR3=0000000010066000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c58400 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=00007fffb3e3fb98 CR3=000000000e302000 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=2035343a33343a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a33343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000