syzkaller login: [ 30.179261] BUG: Bad rss-counter state mm:00000000a42e0d9c type:MM_FILEPAGES val:33 [ 30.180509] BUG: Bad rss-counter state mm:00000000a42e0d9c type:MM_ANONPAGES val:22 [ 30.336981] ================================================================== [ 30.338107] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.339258] Read of size 8 at addr ffff88800ec78058 by task sshd/220 [ 30.340222] [ 30.340589] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.341745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.342983] Call Trace: [ 30.343418] [ 30.343815] dump_stack_lvl+0x91/0xf0 [ 30.344481] print_report+0xcc/0x620 [ 30.345137] ? __virt_addr_valid+0x102/0x340 [ 30.345902] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.346751] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347612] kasan_report+0xbe/0xf0 [ 30.348278] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.349144] vma_interval_tree_remove+0xc75/0xec0 [ 30.349981] vma_prepare+0xc54/0x11a0 [ 30.350638] __split_vma+0x5af/0x950 [ 30.351292] ? __pfx___split_vma+0x10/0x10 [ 30.352052] ? find_held_lock+0x2c/0x110 [ 30.352770] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.353551] ? lock_is_held_type+0x9f/0x120 [ 30.354297] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.355140] ? mtree_range_walk+0x632/0x900 [ 30.355902] ? mas_walk+0x5c7/0x7c0 [ 30.356547] do_vmi_munmap+0x1f1/0x2b0 [ 30.357214] mmap_region+0x1f9/0x2660 [ 30.357879] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.358586] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.359581] ? __pfx_lock_acquire+0x10/0x10 [ 30.360361] ? __pfx_mmap_region+0x10/0x10 [ 30.361096] ? security_mmap_addr+0x7d/0xa0 [ 30.361836] ? get_unmapped_area+0x1f5/0x3f0 [ 30.362598] do_mmap+0x854/0xf00 [ 30.363206] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.363897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.364673] ksys_mmap_pgoff+0x3af/0x500 [ 30.365372] do_syscall_64+0x3f/0x90 [ 30.366040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.366939] RIP: 0033:0x7ffbe7cecd82 [ 30.367560] 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 [ 30.370537] RSP: 002b:00007ffc065ba9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.371808] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbe7cecd82 [ 30.373002] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbe7126000 [ 30.374180] RBP: 00007ffbe7126000 R08: 0000000000000009 R09: 0000000000001000 [ 30.375367] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f75349d90 [ 30.376570] R13: 00007ffc065ba9d0 R14: 00007ffc065baa00 R15: 00007ffc065bad60 [ 30.377764] [ 30.378167] [ 30.378459] Allocated by task 213: [ 30.379060] kasan_save_stack+0x22/0x50 [ 30.379775] kasan_set_track+0x25/0x30 [ 30.380462] __kasan_slab_alloc+0x59/0x70 [ 30.381183] kmem_cache_alloc+0x16b/0x370 [ 30.381965] vm_area_dup+0x20/0x160 [ 30.382586] __split_vma+0x170/0x950 [ 30.383198] split_vma+0xc6/0x110 [ 30.383680] mprotect_fixup+0x8d2/0xb30 [ 30.384217] do_mprotect_pkey+0x87e/0xd40 [ 30.384765] __x64_sys_mprotect+0x78/0xc0 [ 30.385315] do_syscall_64+0x3f/0x90 [ 30.385819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.386502] [ 30.386732] Freed by task 213: [ 30.387157] kasan_save_stack+0x22/0x50 [ 30.387700] kasan_set_track+0x25/0x30 [ 30.388225] kasan_save_free_info+0x2b/0x50 [ 30.388782] __kasan_slab_free+0x10a/0x190 [ 30.389342] kmem_cache_free+0x10d/0x4d0 [ 30.389878] rcu_core+0x8c8/0x2860 [ 30.390347] __do_softirq+0x1b7/0x7d4 [ 30.390851] [ 30.391078] Last potentially related work creation: [ 30.391710] kasan_save_stack+0x22/0x50 [ 30.392263] __kasan_record_aux_stack+0x8e/0xa0 [ 30.392916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.393629] remove_vma+0x139/0x170 [ 30.394120] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.394752] do_vmi_munmap+0x1f1/0x2b0 [ 30.395309] __vm_munmap+0x138/0x3a0 [ 30.395835] __x64_sys_munmap+0x59/0x80 [ 30.396391] do_syscall_64+0x3f/0x90 [ 30.396924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.397652] [ 30.397895] The buggy address belongs to the object at ffff88800ec78000 [ 30.397895] which belongs to the cache vm_area_struct of size 168 [ 30.399565] The buggy address is located 88 bytes inside of [ 30.399565] freed 168-byte region [ffff88800ec78000, ffff88800ec780a8) [ 30.401174] [ 30.401421] The buggy address belongs to the physical page: [ 30.402172] page:00000000d0cea7a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec78 [ 30.403408] memcg:ffff888018210c01 [ 30.403909] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.404625] page_type: 0xffffffff() [ 30.405127] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.406176] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018210c01 [ 30.407179] page dumped because: kasan: bad access detected [ 30.407928] [ 30.408168] Memory state around the buggy address: [ 30.408834] ffff88800ec77f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.409799] ffff88800ec77f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.410762] >ffff88800ec78000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.411751] ^ [ 30.412583] ffff88800ec78080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.413522] ffff88800ec78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.414490] ================================================================== [ 30.415524] Disabling lock debugging due to kernel taint [ 32.387183] BUG: Bad rss-counter state mm:000000000a52a66e type:MM_FILEPAGES val:33 [ 32.388461] BUG: Bad rss-counter state mm:000000000a52a66e type:MM_ANONPAGES val:22 [ 32.865696] BUG: Bad rss-counter state mm:0000000014ac0769 type:MM_FILEPAGES val:33 [ 32.866921] BUG: Bad rss-counter state mm:0000000014ac0769 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25992' (ECDSA) to the list of known hosts. 2023/06/21 03:08:26 fuzzer started 2023/06/21 03:08:27 dialing manager at localhost:36067 2023/06/21 03:08:27 checking machine... 2023/06/21 03:08:27 checking revisions... [ 33.568453] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:08:27 testing simple program... [ 33.633290] cgroup: Unknown subsys name 'net' [ 33.690303] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:08:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff854f6380 RCX=0000000000000000 RDX=1ffff11002c51c05 RSI=ffffffff811f8b61 RDI=ffff88801001bea0 RBP=0000000000000001 RSP=ffff888019417b00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88801628e028 R13=0000000000000000 R14=ffff888016a6c000 R15=0000000000000000 RIP=ffffffff811f8b76 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 00007ffbc409d900 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=00007ffe3c92f000 CR3=000000000eaf0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f73d5aee290 CR3=000000000c8b0000 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=a1267587a8602a883840881759fb8d46 XMM02=ec2efd57dc4c00df000000000011b8f8 XMM03=0922cb046cdd4eb7000000000011b9c8 XMM04=afc1000629b554f200000000000ae988 XMM05=19e9129bd510f2350000000000132138 XMM06=220bde1be08becb10000000000130fa0 XMM07=e042d86d42eb936e0000000000122540 XMM08=0922cb046cdd4eb7000000000011b9c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000