syzkaller login: [ 30.145900] BUG: Bad rss-counter state mm:00000000aa38ff37 type:MM_FILEPAGES val:33 [ 30.147661] BUG: Bad rss-counter state mm:00000000aa38ff37 type:MM_ANONPAGES val:22 [ 30.255635] ================================================================== [ 30.256377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.257296] Read of size 8 at addr ffff888018f73140 by task sshd/219 [ 30.257898] [ 30.258074] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.258859] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.259704] Call Trace: [ 30.259964] [ 30.260193] dump_stack_lvl+0x91/0xf0 [ 30.260585] print_report+0xcc/0x620 [ 30.260956] ? __virt_addr_valid+0x102/0x340 [ 30.261376] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.261847] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.262325] kasan_report+0xbe/0xf0 [ 30.262717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.263193] vma_interval_tree_remove+0xc75/0xec0 [ 30.263574] vma_prepare+0xc54/0x11a0 [ 30.263868] __split_vma+0x5af/0x950 [ 30.264149] ? __pfx___split_vma+0x10/0x10 [ 30.264471] ? find_held_lock+0x2c/0x110 [ 30.264790] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.265131] ? lock_is_held_type+0x9f/0x120 [ 30.265444] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.265803] ? mtree_range_walk+0x632/0x900 [ 30.266137] ? mas_walk+0x5c7/0x7c0 [ 30.266420] do_vmi_munmap+0x1f1/0x2b0 [ 30.266714] mmap_region+0x1f9/0x2660 [ 30.266996] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.267326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.267824] ? __pfx_lock_acquire+0x10/0x10 [ 30.268161] ? __pfx_mmap_region+0x10/0x10 [ 30.268467] ? security_mmap_addr+0x7d/0xa0 [ 30.268782] ? get_unmapped_area+0x1f5/0x3f0 [ 30.269102] do_mmap+0x854/0xf00 [ 30.269357] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.269649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.269973] ksys_mmap_pgoff+0x3af/0x500 [ 30.270273] do_syscall_64+0x3f/0x90 [ 30.270552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.270941] RIP: 0033:0x7f4917735d82 [ 30.271203] 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 [ 30.272459] RSP: 002b:00007ffe878f1408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.272994] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4917735d82 [ 30.273488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4916b6f000 [ 30.273984] RBP: 00007f4916b6f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.274480] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fdba2bb20 [ 30.274985] R13: 00007ffe878f1420 R14: 00007ffe878f1450 R15: 00007ffe878f17b0 [ 30.275488] [ 30.275659] [ 30.275780] Allocated by task 212: [ 30.276029] kasan_save_stack+0x22/0x50 [ 30.276316] kasan_set_track+0x25/0x30 [ 30.276605] __kasan_slab_alloc+0x59/0x70 [ 30.276906] kmem_cache_alloc+0x16b/0x370 [ 30.277204] vm_area_dup+0x20/0x160 [ 30.277467] __split_vma+0x170/0x950 [ 30.277735] split_vma+0xc6/0x110 [ 30.277983] mprotect_fixup+0x8d2/0xb30 [ 30.278271] do_mprotect_pkey+0x87e/0xd40 [ 30.278579] __x64_sys_mprotect+0x78/0xc0 [ 30.278886] do_syscall_64+0x3f/0x90 [ 30.279157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.279532] [ 30.279656] Freed by task 212: [ 30.279883] kasan_save_stack+0x22/0x50 [ 30.280167] kasan_set_track+0x25/0x30 [ 30.280448] kasan_save_free_info+0x2b/0x50 [ 30.280752] __kasan_slab_free+0x10a/0x190 [ 30.281069] kmem_cache_free+0x10d/0x4d0 [ 30.281362] rcu_core+0x8c8/0x2860 [ 30.281621] __do_softirq+0x1b7/0x7d4 [ 30.281895] [ 30.282017] Last potentially related work creation: [ 30.282351] kasan_save_stack+0x22/0x50 [ 30.282664] __kasan_record_aux_stack+0x8e/0xa0 [ 30.282995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.283362] remove_vma+0x139/0x170 [ 30.283627] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.283944] do_vmi_munmap+0x1f1/0x2b0 [ 30.284225] __vm_munmap+0x138/0x3a0 [ 30.284502] __x64_sys_munmap+0x59/0x80 [ 30.284793] do_syscall_64+0x3f/0x90 [ 30.285065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.285435] [ 30.285554] The buggy address belongs to the object at ffff888018f730e8 [ 30.285554] which belongs to the cache vm_area_struct of size 168 [ 30.286424] The buggy address is located 88 bytes inside of [ 30.286424] freed 168-byte region [ffff888018f730e8, ffff888018f73190) [ 30.287257] [ 30.287382] The buggy address belongs to the physical page: [ 30.287767] page:000000008f0e62ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f73 [ 30.288408] memcg:ffff88800fefb401 [ 30.288658] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.289042] page_type: 0xffffffff() [ 30.289314] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.289851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fefb401 [ 30.290385] page dumped because: kasan: bad access detected [ 30.290762] [ 30.290879] Memory state around the buggy address: [ 30.291198] ffff888018f73000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.291674] ffff888018f73080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.292143] >ffff888018f73100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.292610] ^ [ 30.292970] ffff888018f73180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.293439] ffff888018f73200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.293909] ================================================================== [ 30.294457] Disabling lock debugging due to kernel taint [ 31.713017] BUG: Bad rss-counter state mm:000000000ec01fcc type:MM_FILEPAGES val:33 [ 31.714226] BUG: Bad rss-counter state mm:000000000ec01fcc type:MM_ANONPAGES val:22 [ 32.119835] BUG: Bad rss-counter state mm:000000004a9cf553 type:MM_FILEPAGES val:33 [ 32.120837] BUG: Bad rss-counter state mm:000000004a9cf553 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31647' (ECDSA) to the list of known hosts. 2023/06/21 01:08:07 fuzzer started 2023/06/21 01:08:07 dialing manager at localhost:36067 2023/06/21 01:08:07 checking machine... 2023/06/21 01:08:07 checking revisions... [ 32.843598] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:08:07 testing simple program... [ 32.895051] cgroup: Unknown subsys name 'net' [ 32.937318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:08:07 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f618b80 RCX=1ffff11001ec3252 RDX=1ffff11001ec31b6 RSI=0000000000000004 RDI=ffff88800f619240 RBP=1ffff110013b9f76 RSP=ffff888009dcfb38 R8 =0000000000000001 R9 =ffffed10013b9f55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f618d98 R13=00000000000000ac R14=ffff88800f618000 R15=ffff88800f618b80 RIP=ffffffff8302b5f7 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 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=00007fff12c66f78 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=00007f86533c05100000563d9bdbc790 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=0000000000000001 RCX=ffffffff838728bb RDX=0000000000028728 RSI=0000000000028728 RDI=ffffffff8658b690 RBP=ffff88800ff1f7a0 RSP=ffff88800ff1f6d8 R8 =0000000000000000 R9 =ffff88800ff1f788 R10=0000000000038001 R11=000000000008b5c1 R12=ffff88800ff1f7a8 R13=ffff88800ff1f790 R14=ffff88800ff1f789 R15=ffff88800ff1f748 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007fc342ae9900 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=00007fc3430a0618 CR3=000000000e964000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000