syzkaller login: [ 31.216862] BUG: Bad rss-counter state mm:0000000051e6e1e9 type:MM_FILEPAGES val:33 [ 31.217940] BUG: Bad rss-counter state mm:0000000051e6e1e9 type:MM_ANONPAGES val:22 [ 31.391264] ================================================================== [ 31.392187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.393107] Read of size 8 at addr ffff88800df17798 by task sshd/219 [ 31.393882] [ 31.394102] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.395079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.396079] Call Trace: [ 31.396415] [ 31.396706] dump_stack_lvl+0x91/0xf0 [ 31.397206] print_report+0xcc/0x620 [ 31.397741] ? __virt_addr_valid+0x102/0x340 [ 31.398297] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398918] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.399539] kasan_report+0xbe/0xf0 [ 31.400011] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.400642] vma_interval_tree_remove+0xc75/0xec0 [ 31.401250] vma_prepare+0xc54/0x11a0 [ 31.401748] __split_vma+0x5af/0x950 [ 31.402222] ? __pfx___split_vma+0x10/0x10 [ 31.402750] ? find_held_lock+0x2c/0x110 [ 31.403276] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.403849] ? lock_is_held_type+0x9f/0x120 [ 31.404403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.405013] ? mtree_range_walk+0x632/0x900 [ 31.405565] ? mas_walk+0x5c7/0x7c0 [ 31.406064] do_vmi_munmap+0x1f1/0x2b0 [ 31.406562] mmap_region+0x1f9/0x2660 [ 31.407043] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.407548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.408258] ? __pfx_lock_acquire+0x10/0x10 [ 31.408787] ? __pfx_mmap_region+0x10/0x10 [ 31.409321] ? security_mmap_addr+0x7d/0xa0 [ 31.409868] ? get_unmapped_area+0x1f5/0x3f0 [ 31.410420] do_mmap+0x854/0xf00 [ 31.410863] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.411358] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.411917] ksys_mmap_pgoff+0x3af/0x500 [ 31.412417] do_syscall_64+0x3f/0x90 [ 31.412889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.413529] RIP: 0033:0x7fc515d25d82 [ 31.414002] 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 [ 31.416119] RSP: 002b:00007fff7220b538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.417027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc515d25d82 [ 31.417881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc51515f000 [ 31.418719] RBP: 00007fc51515f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.419561] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ed0030ec0 [ 31.420407] R13: 00007fff7220b550 R14: 00007fff7220b580 R15: 00007fff7220b8e0 [ 31.421281] [ 31.421570] [ 31.421808] Allocated by task 212: [ 31.422242] kasan_save_stack+0x22/0x50 [ 31.422765] kasan_set_track+0x25/0x30 [ 31.423266] __kasan_slab_alloc+0x59/0x70 [ 31.423797] kmem_cache_alloc+0x16b/0x370 [ 31.424319] vm_area_dup+0x20/0x160 [ 31.424775] __split_vma+0x170/0x950 [ 31.425237] split_vma+0xc6/0x110 [ 31.425694] mprotect_fixup+0x8d2/0xb30 [ 31.426201] do_mprotect_pkey+0x87e/0xd40 [ 31.426723] __x64_sys_mprotect+0x78/0xc0 [ 31.427244] do_syscall_64+0x3f/0x90 [ 31.427714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428355] [ 31.428567] Freed by task 19: [ 31.428961] kasan_save_stack+0x22/0x50 [ 31.429476] kasan_set_track+0x25/0x30 [ 31.429982] kasan_save_free_info+0x2b/0x50 [ 31.430516] __kasan_slab_free+0x10a/0x190 [ 31.431047] kmem_cache_free+0x10d/0x4d0 [ 31.431557] rcu_core+0x8c8/0x2860 [ 31.432005] __do_softirq+0x1b7/0x7d4 [ 31.432482] [ 31.432695] Last potentially related work creation: [ 31.433285] kasan_save_stack+0x22/0x50 [ 31.433792] __kasan_record_aux_stack+0x8e/0xa0 [ 31.434366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.435012] remove_vma+0x139/0x170 [ 31.435467] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.436031] do_vmi_munmap+0x1f1/0x2b0 [ 31.436522] __vm_munmap+0x138/0x3a0 [ 31.436992] __x64_sys_munmap+0x59/0x80 [ 31.437493] do_syscall_64+0x3f/0x90 [ 31.437978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.438623] [ 31.438837] The buggy address belongs to the object at ffff88800df17740 [ 31.438837] which belongs to the cache vm_area_struct of size 168 [ 31.440305] The buggy address is located 88 bytes inside of [ 31.440305] freed 168-byte region [ffff88800df17740, ffff88800df177e8) [ 31.441717] [ 31.441932] The buggy address belongs to the physical page: [ 31.442590] page:00000000a638e9a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf17 [ 31.443677] memcg:ffff88800cfa8301 [ 31.444107] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.444802] page_type: 0xffffffff() [ 31.445255] raw: 0100000000000200 ffff88800879fc80 ffffea000038e600 dead000000000003 [ 31.446183] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfa8301 [ 31.447085] page dumped because: kasan: bad access detected [ 31.447749] [ 31.447969] Memory state around the buggy address: [ 31.448549] ffff88800df17680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.449408] ffff88800df17700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.450307] >ffff88800df17780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.451189] ^ [ 31.451711] ffff88800df17800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.452587] ffff88800df17880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.453459] ================================================================== [ 31.454476] Disabling lock debugging due to kernel taint [ 33.190587] BUG: Bad rss-counter state mm:000000005f24a1cd type:MM_FILEPAGES val:33 [ 33.191286] BUG: Bad rss-counter state mm:000000005f24a1cd type:MM_ANONPAGES val:22 [ 33.607160] BUG: Bad rss-counter state mm:0000000021a0ea23 type:MM_FILEPAGES val:33 [ 33.608268] BUG: Bad rss-counter state mm:0000000021a0ea23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14559' (ECDSA) to the list of known hosts. 2023/06/20 02:53:43 fuzzer started 2023/06/20 02:53:43 dialing manager at localhost:44161 2023/06/20 02:53:43 checking machine... 2023/06/20 02:53:43 checking revisions... [ 34.369011] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:53:44 testing simple program... [ 34.425266] cgroup: Unknown subsys name 'net' [ 34.479308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:53:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f9f0 RCX=0000000000000000 RDX=1ffff110011aff30 RSI=0000000000000000 RDI=ffff888008d7f9c8 RBP=ffff888008d70000 RSP=ffff888008d7f908 R8 =0000000000000280 R9 =0000000000000000 R10=ffff888008d7f958 R11=0000000000000128 R12=0000000000000000 R13=ffff888008d7f980 R14=ffff888008d70000 R15=ffff888008d7f958 RIP=ffffffff81132ab3 RFL=00000246 [---Z-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 0000000000000000 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=00007ffe7d90b398 CR3=0000000005482000 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=00007f9a202385100000563f3810c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e57928 RBX=0000000000000001 RCX=ffff888008e57a18 RDX=1ffff110011caf38 RSI=1ffff110011caf31 RDI=ffff888008e57978 RBP=ffff888008e579d0 RSP=ffff888008e578b8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888008e57978 R11=0000000000000128 R12=ffffed10011caf31 R13=ffff888008e579c0 R14=ffff888008e579c0 R15=ffff888008e57978 RIP=ffffffff81130664 RFL=00000282 [--S----] 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 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=00007f96ee996650 CR3=000000001015c000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000