syzkaller login: [ 35.582679] BUG: Bad rss-counter state mm:00000000347770f7 type:MM_FILEPAGES val:33 [ 35.583376] BUG: Bad rss-counter state mm:00000000347770f7 type:MM_ANONPAGES val:22 [ 35.750651] ================================================================== [ 35.751592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.752531] Read of size 8 at addr ffff888008c66a50 by task sshd/218 [ 35.753301] [ 35.753520] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.754477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.755485] Call Trace: [ 35.755799] [ 35.756093] dump_stack_lvl+0x91/0xf0 [ 35.756601] print_report+0xcc/0x620 [ 35.757105] ? __virt_addr_valid+0x102/0x340 [ 35.757659] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.758275] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.758893] kasan_report+0xbe/0xf0 [ 35.759372] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.759995] vma_interval_tree_remove+0xc75/0xec0 [ 35.760600] vma_prepare+0xc54/0x11a0 [ 35.761090] __split_vma+0x5af/0x950 [ 35.761568] ? __pfx___split_vma+0x10/0x10 [ 35.762096] ? find_held_lock+0x2c/0x110 [ 35.762627] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.763198] ? lock_is_held_type+0x9f/0x120 [ 35.763753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.764375] ? mtree_range_walk+0x632/0x900 [ 35.764944] ? mas_walk+0x5c7/0x7c0 [ 35.765425] do_vmi_munmap+0x1f1/0x2b0 [ 35.765918] mmap_region+0x1f9/0x2660 [ 35.766408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.766919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.767654] ? __pfx_lock_acquire+0x10/0x10 [ 35.768188] ? __pfx_mmap_region+0x10/0x10 [ 35.768726] ? security_mmap_addr+0x7d/0xa0 [ 35.769265] ? get_unmapped_area+0x1f5/0x3f0 [ 35.769816] do_mmap+0x854/0xf00 [ 35.770274] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.770771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.771352] ksys_mmap_pgoff+0x3af/0x500 [ 35.771864] do_syscall_64+0x3f/0x90 [ 35.772355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.773008] RIP: 0033:0x7fb24f65ad82 [ 35.773473] 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 [ 35.775634] RSP: 002b:00007fff9b1be718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.776547] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb24f65ad82 [ 35.777408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb24ea94000 [ 35.778259] RBP: 00007fb24ea94000 R08: 0000000000000009 R09: 0000000000001000 [ 35.779119] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556257351ec0 [ 35.779988] R13: 00007fff9b1be730 R14: 00007fff9b1be760 R15: 00007fff9b1beac0 [ 35.780861] [ 35.781153] [ 35.781372] Allocated by task 211: [ 35.781799] kasan_save_stack+0x22/0x50 [ 35.782307] kasan_set_track+0x25/0x30 [ 35.782801] __kasan_slab_alloc+0x59/0x70 [ 35.783337] kmem_cache_alloc+0x16b/0x370 [ 35.783858] vm_area_dup+0x20/0x160 [ 35.784324] __split_vma+0x170/0x950 [ 35.784785] split_vma+0xc6/0x110 [ 35.785230] mprotect_fixup+0x8d2/0xb30 [ 35.785736] do_mprotect_pkey+0x87e/0xd40 [ 35.786257] __x64_sys_mprotect+0x78/0xc0 [ 35.786782] do_syscall_64+0x3f/0x90 [ 35.787261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.787904] [ 35.788123] Freed by task 211: [ 35.788516] kasan_save_stack+0x22/0x50 [ 35.789028] kasan_set_track+0x25/0x30 [ 35.789526] kasan_save_free_info+0x2b/0x50 [ 35.790068] __kasan_slab_free+0x10a/0x190 [ 35.790607] kmem_cache_free+0x10d/0x4d0 [ 35.791117] rcu_core+0x8c8/0x2860 [ 35.791583] __do_softirq+0x1b7/0x7d4 [ 35.792067] [ 35.792285] Last potentially related work creation: [ 35.792863] kasan_save_stack+0x22/0x50 [ 35.793367] __kasan_record_aux_stack+0x8e/0xa0 [ 35.793941] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.794591] remove_vma+0x139/0x170 [ 35.795056] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.795631] do_vmi_munmap+0x1f1/0x2b0 [ 35.796116] __vm_munmap+0x138/0x3a0 [ 35.796583] __x64_sys_munmap+0x59/0x80 [ 35.797089] do_syscall_64+0x3f/0x90 [ 35.797565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.798213] [ 35.798430] The buggy address belongs to the object at ffff888008c669f8 [ 35.798430] which belongs to the cache vm_area_struct of size 168 [ 35.799922] The buggy address is located 88 bytes inside of [ 35.799922] freed 168-byte region [ffff888008c669f8, ffff888008c66aa0) [ 35.801342] [ 35.801560] The buggy address belongs to the physical page: [ 35.802220] page:00000000df2714e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c66 [ 35.803321] memcg:ffff888016783a01 [ 35.803755] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.804404] page_type: 0xffffffff() [ 35.804858] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.805782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016783a01 [ 35.806701] page dumped because: kasan: bad access detected [ 35.807383] [ 35.807601] Memory state around the buggy address: [ 35.808192] ffff888008c66900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.809057] ffff888008c66980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.809912] >ffff888008c66a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.810770] ^ [ 35.811481] ffff888008c66a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.812337] ffff888008c66b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.813190] ================================================================== [ 35.814288] Disabling lock debugging due to kernel taint [ 37.658205] BUG: Bad rss-counter state mm:0000000050460c36 type:MM_FILEPAGES val:33 [ 37.659291] BUG: Bad rss-counter state mm:0000000050460c36 type:MM_ANONPAGES val:22 [ 38.218958] BUG: Bad rss-counter state mm:000000008ac647f5 type:MM_FILEPAGES val:33 [ 38.220224] BUG: Bad rss-counter state mm:000000008ac647f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64518' (ECDSA) to the list of known hosts. 2023/06/20 13:16:01 fuzzer started 2023/06/20 13:16:01 dialing manager at localhost:36067 2023/06/20 13:16:01 checking machine... 2023/06/20 13:16:01 checking revisions... [ 38.870667] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:16:01 testing simple program... [ 38.922988] cgroup: Unknown subsys name 'net' [ 38.959796] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:16:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb627b85860 CR3=000000000e398000 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=2030303a36313a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36313a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c092f6 RBX=ffffffff860497b4 RCX=ffffffff8449ae0f RDX=0000000000000000 RSI=ffffffff864aa1f0 RDI=ffffffff860497b4 RBP=ffffffff860497b4 RSP=ffff88800fe56ca0 R8 =ffffffff864aa1f0 R9 =ffff88800fe56d98 R10=0000000000038001 R11=00000000000b3b7c R12=ffffffff860497b4 R13=ffffffff860497b4 R14=ffffffff860497b4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f73eba2e900 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=00007f73eba0d020 CR3=0000000016f0e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000