syzkaller login: [ 38.540672] BUG: Bad rss-counter state mm:000000002e1a0078 type:MM_FILEPAGES val:33 [ 38.542162] BUG: Bad rss-counter state mm:000000002e1a0078 type:MM_ANONPAGES val:22 [ 38.688216] ================================================================== [ 38.689156] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.690109] Read of size 8 at addr ffff88800df90140 by task sshd/220 [ 38.691001] [ 38.691223] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.692101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.693126] Call Trace: [ 38.693452] [ 38.693741] dump_stack_lvl+0x91/0xf0 [ 38.694233] print_report+0xcc/0x620 [ 38.694736] ? __virt_addr_valid+0x102/0x340 [ 38.695305] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.695946] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.696604] kasan_report+0xbe/0xf0 [ 38.697089] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.697724] vma_interval_tree_remove+0xc75/0xec0 [ 38.698339] vma_prepare+0xc54/0x11a0 [ 38.698822] __split_vma+0x5af/0x950 [ 38.699301] ? __pfx___split_vma+0x10/0x10 [ 38.699827] ? find_held_lock+0x2c/0x110 [ 38.700372] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.700937] ? lock_is_held_type+0x9f/0x120 [ 38.701571] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.702303] ? mtree_range_walk+0x632/0x900 [ 38.702971] ? mas_walk+0x5c7/0x7c0 [ 38.703545] do_vmi_munmap+0x1f1/0x2b0 [ 38.704145] mmap_region+0x1f9/0x2660 [ 38.704761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.705385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.706240] ? __pfx_lock_acquire+0x10/0x10 [ 38.706867] ? __pfx_mmap_region+0x10/0x10 [ 38.707499] ? security_mmap_addr+0x7d/0xa0 [ 38.708132] ? get_unmapped_area+0x1f5/0x3f0 [ 38.708802] do_mmap+0x854/0xf00 [ 38.709335] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.709934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.710597] ksys_mmap_pgoff+0x3af/0x500 [ 38.711204] do_syscall_64+0x3f/0x90 [ 38.711777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.712544] RIP: 0033:0x7f181cfddd82 [ 38.713086] 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 [ 38.715657] RSP: 002b:00007ffe7e2003d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.716744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f181cfddd82 [ 38.717757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f181c417000 [ 38.718748] RBP: 00007f181c417000 R08: 0000000000000009 R09: 0000000000001000 [ 38.719749] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558543025ec0 [ 38.720761] R13: 00007ffe7e2003f0 R14: 00007ffe7e200420 R15: 00007ffe7e200780 [ 38.721774] [ 38.722116] [ 38.722369] Allocated by task 213: [ 38.722869] kasan_save_stack+0x22/0x50 [ 38.723465] kasan_set_track+0x25/0x30 [ 38.724044] __kasan_slab_alloc+0x59/0x70 [ 38.724672] kmem_cache_alloc+0x16b/0x370 [ 38.725281] vm_area_dup+0x20/0x160 [ 38.725827] __split_vma+0x170/0x950 [ 38.726379] split_vma+0xc6/0x110 [ 38.726903] mprotect_fixup+0x8d2/0xb30 [ 38.727503] do_mprotect_pkey+0x87e/0xd40 [ 38.728122] __x64_sys_mprotect+0x78/0xc0 [ 38.728757] do_syscall_64+0x3f/0x90 [ 38.729322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.730090] [ 38.730350] Freed by task 213: [ 38.730819] kasan_save_stack+0x22/0x50 [ 38.731419] kasan_set_track+0x25/0x30 [ 38.732002] kasan_save_free_info+0x2b/0x50 [ 38.732645] __kasan_slab_free+0x10a/0x190 [ 38.733309] kmem_cache_free+0x10d/0x4d0 [ 38.733982] rcu_core+0x8c8/0x2860 [ 38.734558] __do_softirq+0x1b7/0x7d4 [ 38.735187] [ 38.735469] Last potentially related work creation: [ 38.736237] kasan_save_stack+0x22/0x50 [ 38.736922] __kasan_record_aux_stack+0x8e/0xa0 [ 38.737687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.738521] remove_vma+0x139/0x170 [ 38.739117] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.739914] do_vmi_munmap+0x1f1/0x2b0 [ 38.740571] __vm_munmap+0x138/0x3a0 [ 38.741195] __x64_sys_munmap+0x59/0x80 [ 38.741858] do_syscall_64+0x3f/0x90 [ 38.742482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.743338] [ 38.743607] Second to last potentially related work creation: [ 38.744520] kasan_save_stack+0x22/0x50 [ 38.745191] __kasan_record_aux_stack+0x8e/0xa0 [ 38.745935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.746769] remove_vma+0x139/0x170 [ 38.747349] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.748040] do_vmi_munmap+0x1f1/0x2b0 [ 38.748634] mmap_region+0x1f9/0x2660 [ 38.749192] do_mmap+0x854/0xf00 [ 38.749698] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.750277] ksys_mmap_pgoff+0x7d/0x500 [ 38.750858] do_syscall_64+0x3f/0x90 [ 38.751423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.752182] [ 38.752451] The buggy address belongs to the object at ffff88800df900e8 [ 38.752451] which belongs to the cache vm_area_struct of size 168 [ 38.754189] The buggy address is located 88 bytes inside of [ 38.754189] freed 168-byte region [ffff88800df900e8, ffff88800df90190) [ 38.755861] [ 38.756116] The buggy address belongs to the physical page: [ 38.756907] page:0000000043f59c7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf90 [ 38.758191] memcg:ffff88800f2e3501 [ 38.758700] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.759529] page_type: 0xffffffff() [ 38.760062] raw: 0100000000000200 ffff88800879fc80 ffffea0000372b80 dead000000000003 [ 38.761167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2e3501 [ 38.762243] page dumped because: kasan: bad access detected [ 38.763019] [ 38.763278] Memory state around the buggy address: [ 38.763963] ffff88800df90000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.764991] ffff88800df90080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.766003] >ffff88800df90100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.767007] ^ [ 38.767767] ffff88800df90180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.768786] ffff88800df90200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.769788] ================================================================== [ 38.771025] Disabling lock debugging due to kernel taint [ 40.765868] BUG: Bad rss-counter state mm:00000000a31ef75a type:MM_FILEPAGES val:33 [ 40.766819] BUG: Bad rss-counter state mm:00000000a31ef75a type:MM_ANONPAGES val:22 [ 41.266574] BUG: Bad rss-counter state mm:00000000fd983174 type:MM_FILEPAGES val:33 [ 41.267753] BUG: Bad rss-counter state mm:00000000fd983174 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14077' (ECDSA) to the list of known hosts. 2023/06/20 01:58:36 fuzzer started 2023/06/20 01:58:36 dialing manager at localhost:44161 2023/06/20 01:58:36 checking machine... 2023/06/20 01:58:36 checking revisions... [ 41.986093] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:58:37 testing simple program... [ 42.038007] cgroup: Unknown subsys name 'net' [ 42.091184] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:58:28 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff86605973 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff85407ee8 RDI=ffffffff86605973 RBP=ffffffff86605973 RSP=ffff88806ce09a18 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e1571b0 RIP=ffffffff814c07eb RFL=00000202 [-------] 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=00007ff334aac4d0 CR3=000000000cb76000 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=be8f6d9aa854bba1394dbd07bfd3abc5 XMM02=000000000011d2b0ec2efd57dc4c00df XMM03=0000000000124848d909ef8762144f05 XMM04=550e69943658452200000000000ae988 XMM05=5f34096e4e931fd00000000000135bc0 XMM06=4fda316b135da52b00000000001355b8 XMM07=e042d86d42eb936e0000000000124ac8 XMM08=d909ef8762144f05000000000011d310 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800ea8bb18 RCX=1ffff11001d5176a RDX=1ffff11003902789 RSI=ffff88800fe0f000 RDI=ffff88800ea8bb50 RBP=ffff88800ea8bb20 RSP=ffff88800fe374b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801c813c48 R13=0000000000000000 R14=ffff88801c813c28 R15=ffff88801c813be0 RIP=ffffffff8184756a RFL=00000046 [---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 00007f4369772900 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=00007ffc60058000 CR3=000000000fc70000 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=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