syzkaller login: [ 32.132654] BUG: Bad rss-counter state mm:00000000adab3332 type:MM_FILEPAGES val:33 [ 32.133906] BUG: Bad rss-counter state mm:00000000adab3332 type:MM_ANONPAGES val:22 [ 32.360538] ================================================================== [ 32.361530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.362534] Read of size 8 at addr ffff88801473b228 by task sshd/220 [ 32.363456] [ 32.363689] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.364623] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.365675] Call Trace: [ 32.366017] [ 32.366317] dump_stack_lvl+0x91/0xf0 [ 32.366846] print_report+0xcc/0x620 [ 32.367370] ? __virt_addr_valid+0x102/0x340 [ 32.367954] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.368650] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.369312] kasan_report+0xbe/0xf0 [ 32.369820] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.370488] vma_interval_tree_remove+0xc75/0xec0 [ 32.371139] vma_prepare+0xc54/0x11a0 [ 32.371657] __split_vma+0x5af/0x950 [ 32.372164] ? __pfx___split_vma+0x10/0x10 [ 32.372735] ? find_held_lock+0x2c/0x110 [ 32.373297] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.373905] ? lock_is_held_type+0x9f/0x120 [ 32.374490] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.375145] ? mtree_range_walk+0x632/0x900 [ 32.375748] ? mas_walk+0x5c7/0x7c0 [ 32.376260] do_vmi_munmap+0x1f1/0x2b0 [ 32.376807] mmap_region+0x1f9/0x2660 [ 32.377329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.377884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.378656] ? __pfx_lock_acquire+0x10/0x10 [ 32.379228] ? __pfx_mmap_region+0x10/0x10 [ 32.379801] ? security_mmap_addr+0x7d/0xa0 [ 32.380368] ? get_unmapped_area+0x1f5/0x3f0 [ 32.380969] do_mmap+0x854/0xf00 [ 32.381442] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.381976] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.382581] ksys_mmap_pgoff+0x3af/0x500 [ 32.383126] do_syscall_64+0x3f/0x90 [ 32.383648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.384342] RIP: 0033:0x7fc0c8f38d82 [ 32.384835] 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 [ 32.387123] RSP: 002b:00007fffcfb4ff48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.388086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0c8f38d82 [ 32.389002] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0c8372000 [ 32.389911] RBP: 00007fc0c8372000 R08: 0000000000000009 R09: 0000000000001000 [ 32.390821] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e1063aec0 [ 32.391733] R13: 00007fffcfb4ff60 R14: 00007fffcfb4ff90 R15: 00007fffcfb502f0 [ 32.392661] [ 32.392983] [ 32.393211] Allocated by task 211: [ 32.393674] kasan_save_stack+0x22/0x50 [ 32.394217] kasan_set_track+0x25/0x30 [ 32.394749] __kasan_slab_alloc+0x59/0x70 [ 32.395309] kmem_cache_alloc+0x16b/0x370 [ 32.395866] vm_area_dup+0x20/0x160 [ 32.396355] __split_vma+0x170/0x950 [ 32.396870] split_vma+0xc6/0x110 [ 32.397349] mprotect_fixup+0x8d2/0xb30 [ 32.397889] do_mprotect_pkey+0x87e/0xd40 [ 32.398448] __x64_sys_mprotect+0x78/0xc0 [ 32.399009] do_syscall_64+0x3f/0x90 [ 32.399519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.400210] [ 32.400437] Freed by task 211: [ 32.400868] kasan_save_stack+0x22/0x50 [ 32.401406] kasan_set_track+0x25/0x30 [ 32.401938] kasan_save_free_info+0x2b/0x50 [ 32.402510] __kasan_slab_free+0x10a/0x190 [ 32.403085] kmem_cache_free+0x10d/0x4d0 [ 32.403627] rcu_core+0x8c8/0x2860 [ 32.404104] __do_softirq+0x1b7/0x7d4 [ 32.404626] [ 32.404859] Last potentially related work creation: [ 32.405486] kasan_save_stack+0x22/0x50 [ 32.406031] __kasan_record_aux_stack+0x8e/0xa0 [ 32.406644] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.407340] remove_vma+0x139/0x170 [ 32.407827] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.408425] do_vmi_munmap+0x1f1/0x2b0 [ 32.408952] __vm_munmap+0x138/0x3a0 [ 32.409455] __x64_sys_munmap+0x59/0x80 [ 32.410002] do_syscall_64+0x3f/0x90 [ 32.410508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.411201] [ 32.411428] The buggy address belongs to the object at ffff88801473b1d0 [ 32.411428] which belongs to the cache vm_area_struct of size 168 [ 32.413011] The buggy address is located 88 bytes inside of [ 32.413011] freed 168-byte region [ffff88801473b1d0, ffff88801473b278) [ 32.414523] [ 32.414757] The buggy address belongs to the physical page: [ 32.415467] page:000000005e1d98a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1473b [ 32.416656] memcg:ffff88800ec53701 [ 32.417114] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.417874] page_type: 0xffffffff() [ 32.418365] raw: 0100000000000200 ffff88800879fc80 ffffea00005ae6c0 dead000000000005 [ 32.419352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec53701 [ 32.420327] page dumped because: kasan: bad access detected [ 32.421040] [ 32.421272] Memory state around the buggy address: [ 32.421896] ffff88801473b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.422815] ffff88801473b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.423735] >ffff88801473b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.424666] ^ [ 32.425273] ffff88801473b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.426196] ffff88801473b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.427125] ================================================================== [ 32.428269] Disabling lock debugging due to kernel taint [ 34.276696] BUG: Bad rss-counter state mm:0000000040d019da type:MM_FILEPAGES val:33 [ 34.277885] BUG: Bad rss-counter state mm:0000000040d019da type:MM_ANONPAGES val:22 [ 34.686142] BUG: Bad rss-counter state mm:00000000285dd6f3 type:MM_FILEPAGES val:33 [ 34.686922] BUG: Bad rss-counter state mm:00000000285dd6f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50784' (ECDSA) to the list of known hosts. 2023/06/20 04:56:32 fuzzer started 2023/06/20 04:56:32 dialing manager at localhost:44161 2023/06/20 04:56:32 checking machine... 2023/06/20 04:56:32 checking revisions... [ 35.356087] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:56:32 testing simple program... [ 35.403928] cgroup: Unknown subsys name 'net' [ 35.452957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:56:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd95519ff8 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=00007f9731da75100000557f01249790 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=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8450b05d RDX=00000000000350b0 RSI=00000000000350b0 RDI=ffffffff865bbe80 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000000 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f5e94fec900 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=00007ffeb2a7a000 CR3=000000001a0cc000 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