syzkaller login: [ 30.852539] BUG: Bad rss-counter state mm:00000000ce1f1675 type:MM_FILEPAGES val:33 [ 30.854093] BUG: Bad rss-counter state mm:00000000ce1f1675 type:MM_ANONPAGES val:22 [ 31.015455] ================================================================== [ 31.016324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.017206] Read of size 8 at addr ffff88800decfed8 by task sshd/219 [ 31.018006] [ 31.018241] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.019057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.019978] Call Trace: [ 31.020447] [ 31.020875] dump_stack_lvl+0x91/0xf0 [ 31.021482] print_report+0xcc/0x620 [ 31.022101] ? __virt_addr_valid+0x102/0x340 [ 31.022780] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.023543] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.024301] kasan_report+0xbe/0xf0 [ 31.024877] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.025645] vma_interval_tree_remove+0xc75/0xec0 [ 31.026415] vma_prepare+0xc54/0x11a0 [ 31.026996] __split_vma+0x5af/0x950 [ 31.027575] ? __pfx___split_vma+0x10/0x10 [ 31.028235] ? find_held_lock+0x2c/0x110 [ 31.028877] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.029576] ? lock_is_held_type+0x9f/0x120 [ 31.030253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.030992] ? mtree_range_walk+0x632/0x900 [ 31.031670] ? mas_walk+0x5c7/0x7c0 [ 31.032241] do_vmi_munmap+0x1f1/0x2b0 [ 31.032845] mmap_region+0x1f9/0x2660 [ 31.033439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.034097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.034988] ? __pfx_lock_acquire+0x10/0x10 [ 31.035645] ? __pfx_mmap_region+0x10/0x10 [ 31.036290] ? security_mmap_addr+0x7d/0xa0 [ 31.036944] ? get_unmapped_area+0x1f5/0x3f0 [ 31.037621] do_mmap+0x854/0xf00 [ 31.038164] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.038769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.039455] ksys_mmap_pgoff+0x3af/0x500 [ 31.040089] do_syscall_64+0x3f/0x90 [ 31.040661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041447] RIP: 0033:0x7f12e8adcd82 [ 31.042025] 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 [ 31.044662] RSP: 002b:00007ffc8905ec18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.045782] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12e8adcd82 [ 31.046858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12e7f16000 [ 31.047914] RBP: 00007f12e7f16000 R08: 0000000000000009 R09: 0000000000001000 [ 31.048950] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f720b28ec0 [ 31.050009] R13: 00007ffc8905ec30 R14: 00007ffc8905ec60 R15: 00007ffc8905efc0 [ 31.051077] [ 31.051434] [ 31.051700] Allocated by task 212: [ 31.052227] kasan_save_stack+0x22/0x50 [ 31.052841] kasan_set_track+0x25/0x30 [ 31.053447] __kasan_slab_alloc+0x59/0x70 [ 31.054088] kmem_cache_alloc+0x16b/0x370 [ 31.054610] vm_area_dup+0x20/0x160 [ 31.055072] __split_vma+0x170/0x950 [ 31.055529] split_vma+0xc6/0x110 [ 31.055972] mprotect_fixup+0x8d2/0xb30 [ 31.056471] do_mprotect_pkey+0x87e/0xd40 [ 31.056994] __x64_sys_mprotect+0x78/0xc0 [ 31.057525] do_syscall_64+0x3f/0x90 [ 31.058006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058655] [ 31.058878] Freed by task 212: [ 31.059271] kasan_save_stack+0x22/0x50 [ 31.059778] kasan_set_track+0x25/0x30 [ 31.060271] kasan_save_free_info+0x2b/0x50 [ 31.060811] __kasan_slab_free+0x10a/0x190 [ 31.061345] kmem_cache_free+0x10d/0x4d0 [ 31.061856] rcu_core+0x8c8/0x2860 [ 31.062301] __do_softirq+0x1b7/0x7d4 [ 31.062777] [ 31.062992] Last potentially related work creation: [ 31.063584] kasan_save_stack+0x22/0x50 [ 31.064090] __kasan_record_aux_stack+0x8e/0xa0 [ 31.064675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.065322] remove_vma+0x139/0x170 [ 31.065773] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.066341] do_vmi_munmap+0x1f1/0x2b0 [ 31.066833] __vm_munmap+0x138/0x3a0 [ 31.067308] __x64_sys_munmap+0x59/0x80 [ 31.067803] do_syscall_64+0x3f/0x90 [ 31.068285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.068915] [ 31.069130] The buggy address belongs to the object at ffff88800decfe80 [ 31.069130] which belongs to the cache vm_area_struct of size 168 [ 31.070605] The buggy address is located 88 bytes inside of [ 31.070605] freed 168-byte region [ffff88800decfe80, ffff88800decff28) [ 31.072015] [ 31.072238] The buggy address belongs to the physical page: [ 31.072906] page:0000000083fb1047 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdecf [ 31.074008] memcg:ffff88800df9a001 [ 31.074429] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.075080] page_type: 0xffffffff() [ 31.075535] raw: 0100000000000200 ffff8880087a0c80 ffffea000037fac0 dead000000000008 [ 31.076459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df9a001 [ 31.077376] page dumped because: kasan: bad access detected [ 31.078058] [ 31.078273] Memory state around the buggy address: [ 31.078861] ffff88800decfd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.079719] ffff88800decfe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.080583] >ffff88800decfe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.081444] ^ [ 31.082184] ffff88800decff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.083043] ffff88800decff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.083902] ================================================================== [ 31.084912] Disabling lock debugging due to kernel taint [ 33.313841] BUG: Bad rss-counter state mm:00000000d4919a71 type:MM_FILEPAGES val:33 [ 33.314885] BUG: Bad rss-counter state mm:00000000d4919a71 type:MM_ANONPAGES val:22 [ 33.808757] BUG: Bad rss-counter state mm:00000000e1e6e10a type:MM_FILEPAGES val:33 [ 33.809981] BUG: Bad rss-counter state mm:00000000e1e6e10a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6724' (ECDSA) to the list of known hosts. 2023/06/20 17:46:49 fuzzer started 2023/06/20 17:46:49 dialing manager at localhost:36067 2023/06/20 17:46:49 checking machine... 2023/06/20 17:46:49 checking revisions... [ 34.537933] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:46:49 testing simple program... [ 34.596970] cgroup: Unknown subsys name 'net' [ 34.718501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:46:49 Registers: info registers vcpu 0 RAX=ffff8880164a0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801649f801 RSI=ffff88801649f8d8 RDI=ffff88801649f558 RBP=ffff88801649f5a0 RSP=ffff88801649f4d8 R8 =ffffffff86138f56 R9 =ffff88801649f588 R10=0000000000038001 R11=0000000000020db7 R12=ffff88801649f5a8 R13=ffff88801649f590 R14=ffff88801649f8e0 R15=ffff88801649f548 RIP=ffffffff81131039 RFL=00000202 [-------] 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 00007faf4ade4700 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=00007f853803c7c0 CR3=0000000016856000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860ae4d2 RDX=1ffff110011c6f34 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008e379b0 RSP=ffff888008e378e8 R8 =ffffffff860ae4d6 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008e379b8 R13=ffff888008e379a0 R14=0000000000000005 R15=ffff888008e37958 RIP=ffffffff81130b54 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 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=00007ffd0185d000 CR3=000000000c630000 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