syzkaller login: [ 30.676004] BUG: Bad rss-counter state mm:00000000b7abb65f type:MM_FILEPAGES val:33 [ 30.677263] BUG: Bad rss-counter state mm:00000000b7abb65f type:MM_ANONPAGES val:22 [ 30.831125] ================================================================== [ 30.832307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.833627] Read of size 8 at addr ffff888016b50b38 by task sshd/221 [ 30.834608] [ 30.834938] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.836089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.837393] Call Trace: [ 30.837846] [ 30.838256] dump_stack_lvl+0x91/0xf0 [ 30.838984] print_report+0xcc/0x620 [ 30.839642] ? __virt_addr_valid+0x102/0x340 [ 30.840314] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840973] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.841610] kasan_report+0xbe/0xf0 [ 30.842110] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.842760] vma_interval_tree_remove+0xc75/0xec0 [ 30.843452] vma_prepare+0xc54/0x11a0 [ 30.844031] __split_vma+0x5af/0x950 [ 30.844574] ? __pfx___split_vma+0x10/0x10 [ 30.845183] ? find_held_lock+0x2c/0x110 [ 30.845827] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.846581] ? lock_is_held_type+0x9f/0x120 [ 30.847332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.848171] ? mtree_range_walk+0x632/0x900 [ 30.848820] ? mas_walk+0x5c7/0x7c0 [ 30.849443] do_vmi_munmap+0x1f1/0x2b0 [ 30.850123] mmap_region+0x1f9/0x2660 [ 30.850758] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.851406] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.852289] ? __pfx_lock_acquire+0x10/0x10 [ 30.852938] ? __pfx_mmap_region+0x10/0x10 [ 30.853575] ? security_mmap_addr+0x7d/0xa0 [ 30.854207] ? get_unmapped_area+0x1f5/0x3f0 [ 30.854877] do_mmap+0x854/0xf00 [ 30.855424] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.856036] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.856716] ksys_mmap_pgoff+0x3af/0x500 [ 30.857323] do_syscall_64+0x3f/0x90 [ 30.857908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858685] RIP: 0033:0x7fd042c5ad82 [ 30.859237] 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 [ 30.861890] RSP: 002b:00007ffddc9a0358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.862769] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd042c5ad82 [ 30.863564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd042094000 [ 30.864394] RBP: 00007fd042094000 R08: 0000000000000009 R09: 0000000000001000 [ 30.865335] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cbea2bec0 [ 30.866490] R13: 00007ffddc9a0370 R14: 00007ffddc9a03a0 R15: 00007ffddc9a0700 [ 30.867600] [ 30.867986] [ 30.868267] Allocated by task 214: [ 30.868851] kasan_save_stack+0x22/0x50 [ 30.869549] kasan_set_track+0x25/0x30 [ 30.870210] __kasan_slab_alloc+0x59/0x70 [ 30.870880] kmem_cache_alloc+0x16b/0x370 [ 30.871594] vm_area_dup+0x20/0x160 [ 30.872229] __split_vma+0x170/0x950 [ 30.872842] split_vma+0xc6/0x110 [ 30.873412] mprotect_fixup+0x8d2/0xb30 [ 30.874085] do_mprotect_pkey+0x87e/0xd40 [ 30.874887] __x64_sys_mprotect+0x78/0xc0 [ 30.875707] do_syscall_64+0x3f/0x90 [ 30.876389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877311] [ 30.877631] Freed by task 204: [ 30.878200] kasan_save_stack+0x22/0x50 [ 30.878910] kasan_set_track+0x25/0x30 [ 30.879498] kasan_save_free_info+0x2b/0x50 [ 30.880152] __kasan_slab_free+0x10a/0x190 [ 30.880779] kmem_cache_free+0x10d/0x4d0 [ 30.881375] rcu_core+0x8c8/0x2860 [ 30.881955] __do_softirq+0x1b7/0x7d4 [ 30.882648] [ 30.882968] Last potentially related work creation: [ 30.883841] kasan_save_stack+0x22/0x50 [ 30.884308] __kasan_record_aux_stack+0x8e/0xa0 [ 30.884856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.885545] remove_vma+0x139/0x170 [ 30.886062] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.886703] do_vmi_munmap+0x1f1/0x2b0 [ 30.887267] __vm_munmap+0x138/0x3a0 [ 30.887990] __x64_sys_munmap+0x59/0x80 [ 30.888563] do_syscall_64+0x3f/0x90 [ 30.889089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889829] [ 30.890039] The buggy address belongs to the object at ffff888016b50ae0 [ 30.890039] which belongs to the cache vm_area_struct of size 168 [ 30.891341] The buggy address is located 88 bytes inside of [ 30.891341] freed 168-byte region [ffff888016b50ae0, ffff888016b50b88) [ 30.892599] [ 30.892795] The buggy address belongs to the physical page: [ 30.893400] page:0000000028d893cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b50 [ 30.894400] memcg:ffff888016fb5001 [ 30.894795] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.895378] page_type: 0xffffffff() [ 30.895799] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.896629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fb5001 [ 30.897447] page dumped because: kasan: bad access detected [ 30.898057] [ 30.898253] Memory state around the buggy address: [ 30.898772] ffff888016b50a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.899529] ffff888016b50a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.900299] >ffff888016b50b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.901077] ^ [ 30.901632] ffff888016b50b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.902405] ffff888016b50c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.903312] ================================================================== [ 30.904694] Disabling lock debugging due to kernel taint [ 32.972883] BUG: Bad rss-counter state mm:000000007b53ac93 type:MM_FILEPAGES val:33 [ 32.974049] BUG: Bad rss-counter state mm:000000007b53ac93 type:MM_ANONPAGES val:22 [ 33.458431] BUG: Bad rss-counter state mm:00000000e6f4a5f2 type:MM_FILEPAGES val:33 [ 33.459451] BUG: Bad rss-counter state mm:00000000e6f4a5f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53283' (ECDSA) to the list of known hosts. 2023/06/21 08:25:19 fuzzer started 2023/06/21 08:25:20 dialing manager at localhost:36067 2023/06/21 08:25:20 checking machine... 2023/06/21 08:25:20 checking revisions... [ 34.129132] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:25:20 testing simple program... [ 34.166157] cgroup: Unknown subsys name 'net' [ 34.206304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:25:19 Registers: info registers vcpu 0 RAX=ffffffff83639d66 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110039c8f0c RSI=ffffffff83639d66 RDI=ffff88801ce478d0 RBP=ffff88801ce478a0 RSP=ffff88801ce47800 R8 =0000000000000001 R9 =ffff88801ce47848 R10=0000000000038001 R11=000000000009a8ce R12=ffff88801ce478d0 R13=0000000000000000 R14=ffff888015edb680 R15=0000000000092cc0 RIP=ffffffff813ad470 RFL=00000286 [--S--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 00007f86b37a4900 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=00007f86b3d59650 CR3=000000000df4e000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=ffffffff86098092 RDX=1ffff1100d9e1353 RSI=ffff88806cf09a90 RDI=ffff88806cf09a98 RBP=ffff88806cf09a90 RSP=ffff88806cf099a0 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff88806cf09a98 R15=ffff88806cf09a98 RIP=ffffffff81130416 RFL=00000286 [--S--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 00007f3256d59900 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=00007f32561e0da0 CR3=0000000013a92000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=89bf63425adbcefd00000000000ae988 XMM05=9e57a6d207de1af20000000000133b68 XMM06=c291bd5c70af25b90000000000132958 XMM07=fb795ef6d65770560000000000122bf8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000