syzkaller login: [ 34.895648] BUG: Bad rss-counter state mm:0000000026dda79e type:MM_FILEPAGES val:33 [ 34.897188] BUG: Bad rss-counter state mm:0000000026dda79e type:MM_ANONPAGES val:22 [ 35.044419] ================================================================== [ 35.045373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.046321] Read of size 8 at addr ffff888018eae968 by task sshd/220 [ 35.047107] [ 35.047327] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.048202] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.049196] Call Trace: [ 35.049522] <TASK> [ 35.049813] dump_stack_lvl+0x91/0xf0 [ 35.050345] print_report+0xcc/0x620 [ 35.050839] ? __virt_addr_valid+0x102/0x340 [ 35.051394] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.052023] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.052662] kasan_report+0xbe/0xf0 [ 35.053155] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.053794] vma_interval_tree_remove+0xc75/0xec0 [ 35.054435] vma_prepare+0xc54/0x11a0 [ 35.054923] __split_vma+0x5af/0x950 [ 35.055396] ? __pfx___split_vma+0x10/0x10 [ 35.055951] ? find_held_lock+0x2c/0x110 [ 35.056676] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.057248] ? lock_is_held_type+0x9f/0x120 [ 35.057797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.058438] ? mtree_range_walk+0x632/0x900 [ 35.058996] ? mas_walk+0x5c7/0x7c0 [ 35.059474] do_vmi_munmap+0x1f1/0x2b0 [ 35.059981] mmap_region+0x1f9/0x2660 [ 35.060474] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.060983] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.061701] ? __pfx_lock_acquire+0x10/0x10 [ 35.062247] ? __pfx_mmap_region+0x10/0x10 [ 35.062791] ? security_mmap_addr+0x7d/0xa0 [ 35.063328] ? get_unmapped_area+0x1f5/0x3f0 [ 35.063893] do_mmap+0x854/0xf00 [ 35.064341] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.064848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.065416] ksys_mmap_pgoff+0x3af/0x500 [ 35.065923] do_syscall_64+0x3f/0x90 [ 35.066417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.067068] RIP: 0033:0x7f1423a6cd82 [ 35.067538] 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 [ 35.069680] RSP: 002b:00007fffafc5a988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.070611] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1423a6cd82 [ 35.071474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1422ea6000 [ 35.072316] RBP: 00007f1422ea6000 R08: 0000000000000009 R09: 0000000000001000 [ 35.073171] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cebac74f70 [ 35.074031] R13: 00007fffafc5a9a0 R14: 00007fffafc5a9d0 R15: 00007fffafc5ad30 [ 35.074919] </TASK> [ 35.075227] [ 35.075445] Allocated by task 213: [ 35.075887] kasan_save_stack+0x22/0x50 [ 35.076393] kasan_set_track+0x25/0x30 [ 35.076895] __kasan_slab_alloc+0x59/0x70 [ 35.077418] kmem_cache_alloc+0x16b/0x370 [ 35.077942] vm_area_dup+0x20/0x160 [ 35.078477] __split_vma+0x170/0x950 [ 35.078964] split_vma+0xc6/0x110 [ 35.079412] mprotect_fixup+0x8d2/0xb30 [ 35.079922] do_mprotect_pkey+0x87e/0xd40 [ 35.080469] __x64_sys_mprotect+0x78/0xc0 [ 35.080998] do_syscall_64+0x3f/0x90 [ 35.081489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.082145] [ 35.082370] Freed by task 213: [ 35.082773] kasan_save_stack+0x22/0x50 [ 35.083289] kasan_set_track+0x25/0x30 [ 35.083802] kasan_save_free_info+0x2b/0x50 [ 35.084342] __kasan_slab_free+0x10a/0x190 [ 35.084888] kmem_cache_free+0x10d/0x4d0 [ 35.085400] rcu_core+0x8c8/0x2860 [ 35.085864] __do_softirq+0x1b7/0x7d4 [ 35.086357] [ 35.086573] Last potentially related work creation: [ 35.087160] kasan_save_stack+0x22/0x50 [ 35.087669] __kasan_record_aux_stack+0x8e/0xa0 [ 35.088251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.088905] remove_vma+0x139/0x170 [ 35.089364] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.089929] do_vmi_munmap+0x1f1/0x2b0 [ 35.090451] __vm_munmap+0x138/0x3a0 [ 35.090931] __x64_sys_munmap+0x59/0x80 [ 35.091438] do_syscall_64+0x3f/0x90 [ 35.091920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.092569] [ 35.092782] The buggy address belongs to the object at ffff888018eae910 [ 35.092782] which belongs to the cache vm_area_struct of size 168 [ 35.094275] The buggy address is located 88 bytes inside of [ 35.094275] freed 168-byte region [ffff888018eae910, ffff888018eae9b8) [ 35.095735] [ 35.095958] The buggy address belongs to the physical page: [ 35.096620] page:00000000bf32738d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18eae [ 35.097734] memcg:ffff8880182b3e01 [ 35.098185] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.098904] page_type: 0xffffffff() [ 35.099364] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.100301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182b3e01 [ 35.101218] page dumped because: kasan: bad access detected [ 35.101899] [ 35.102128] Memory state around the buggy address: [ 35.102719] ffff888018eae800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.103604] ffff888018eae880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.104473] >ffff888018eae900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.105328] ^ [ 35.106126] ffff888018eae980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.106978] ffff888018eaea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.107834] ================================================================== [ 35.108770] Disabling lock debugging due to kernel taint [ 37.344415] BUG: Bad rss-counter state mm:00000000f0f7df5e type:MM_FILEPAGES val:33 [ 37.345889] BUG: Bad rss-counter state mm:00000000f0f7df5e type:MM_ANONPAGES val:22 [ 37.888297] BUG: Bad rss-counter state mm:0000000018c8cf07 type:MM_FILEPAGES val:33 [ 37.889493] BUG: Bad rss-counter state mm:0000000018c8cf07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4128' (ECDSA) to the list of known hosts. 2023/06/20 07:34:47 fuzzer started 2023/06/20 07:34:47 dialing manager at localhost:44161 2023/06/20 07:34:47 checking machine... 2023/06/20 07:34:47 checking revisions... [ 38.523681] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:34:47 testing simple program... [ 38.580215] cgroup: Unknown subsys name 'net' [ 38.638363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:34:41 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11001e51f05 RSP=ffff88800f28f818 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88806ce39518 R13=ffffffff8126f687 R14=0000000000000000 R15=ffff888008c58000 RIP=ffffffff812d86a2 RFL=00000047 [---Z-PC] 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 00007fcf0f739700 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=00007f967845ef30 CR3=0000000018c4a000 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=2037343a34333a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a34333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888018f3fce0 RCX=0000000000000001 RDX=1ffff110031e7e58 RSI=ffff888018f3fcb0 RDI=ffff888018f3f2c0 RBP=ffff888018f38000 RSP=ffff888018f3f240 R8 =0000000000000001 R9 =ffff888018f3f2f0 R10=0000000000038001 R11=0000000000091be7 R12=ffff888018f3f310 R13=ffff888018f3f2f8 R14=ffff888018f3fcb0 R15=ffff888018f3f2b0 RIP=ffffffff81131ca6 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 00007f4a17c98900 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=00007ffc8b5f7000 CR3=000000000e856000 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=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