syzkaller login: [ 28.815212] BUG: Bad rss-counter state mm:00000000dee58e9f type:MM_FILEPAGES val:33 [ 28.816513] BUG: Bad rss-counter state mm:00000000dee58e9f type:MM_ANONPAGES val:22 [ 28.993163] ================================================================== [ 28.994125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.995102] Read of size 8 at addr ffff88800cecb798 by task sshd/221 [ 28.995889] [ 28.996116] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.997325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.998329] Call Trace: [ 28.998677] [ 28.999126] dump_stack_lvl+0x91/0xf0 [ 28.999772] print_report+0xcc/0x620 [ 29.000375] ? __virt_addr_valid+0x102/0x340 [ 29.001083] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.001888] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.002673] kasan_report+0xbe/0xf0 [ 29.003288] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.004083] vma_interval_tree_remove+0xc75/0xec0 [ 29.004857] vma_prepare+0xc54/0x11a0 [ 29.005490] __split_vma+0x5af/0x950 [ 29.006095] ? __pfx___split_vma+0x10/0x10 [ 29.006774] ? find_held_lock+0x2c/0x110 [ 29.007455] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.008188] ? lock_is_held_type+0x9f/0x120 [ 29.008863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.009678] ? mtree_range_walk+0x632/0x900 [ 29.010265] ? mas_walk+0x5c7/0x7c0 [ 29.010763] do_vmi_munmap+0x1f1/0x2b0 [ 29.011282] mmap_region+0x1f9/0x2660 [ 29.011791] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.012329] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.013074] ? __pfx_lock_acquire+0x10/0x10 [ 29.013636] ? __pfx_mmap_region+0x10/0x10 [ 29.014193] ? security_mmap_addr+0x7d/0xa0 [ 29.014753] ? get_unmapped_area+0x1f5/0x3f0 [ 29.015329] do_mmap+0x854/0xf00 [ 29.015789] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.016308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.016897] ksys_mmap_pgoff+0x3af/0x500 [ 29.017446] do_syscall_64+0x3f/0x90 [ 29.017950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.018635] RIP: 0033:0x7f3f65992d82 [ 29.019119] 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 [ 29.021394] RSP: 002b:00007ffd48984bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.022352] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f65992d82 [ 29.023233] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f64dcc000 [ 29.024089] RBP: 00007f3f64dcc000 R08: 0000000000000009 R09: 0000000000001000 [ 29.024945] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c04e1bec0 [ 29.025812] R13: 00007ffd48984be0 R14: 00007ffd48984c10 R15: 00007ffd48984f70 [ 29.026666] [ 29.026961] [ 29.027177] Allocated by task 214: [ 29.027610] kasan_save_stack+0x22/0x50 [ 29.028116] kasan_set_track+0x25/0x30 [ 29.028613] __kasan_slab_alloc+0x59/0x70 [ 29.029144] kmem_cache_alloc+0x16b/0x370 [ 29.029681] vm_area_dup+0x20/0x160 [ 29.030141] __split_vma+0x170/0x950 [ 29.030606] split_vma+0xc6/0x110 [ 29.031052] mprotect_fixup+0x8d2/0xb30 [ 29.031558] do_mprotect_pkey+0x87e/0xd40 [ 29.032083] __x64_sys_mprotect+0x78/0xc0 [ 29.032610] do_syscall_64+0x3f/0x90 [ 29.033089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.033767] [ 29.033988] Freed by task 214: [ 29.034388] kasan_save_stack+0x22/0x50 [ 29.034924] kasan_set_track+0x25/0x30 [ 29.035437] kasan_save_free_info+0x2b/0x50 [ 29.035990] __kasan_slab_free+0x10a/0x190 [ 29.036545] kmem_cache_free+0x10d/0x4d0 [ 29.037076] rcu_core+0x8c8/0x2860 [ 29.037567] __do_softirq+0x1b7/0x7d4 [ 29.038070] [ 29.038294] Last potentially related work creation: [ 29.038911] kasan_save_stack+0x22/0x50 [ 29.039441] __kasan_record_aux_stack+0x8e/0xa0 [ 29.040045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.040716] remove_vma+0x139/0x170 [ 29.041186] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.041782] do_vmi_munmap+0x1f1/0x2b0 [ 29.042288] __vm_munmap+0x138/0x3a0 [ 29.042774] __x64_sys_munmap+0x59/0x80 [ 29.043294] do_syscall_64+0x3f/0x90 [ 29.043797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.044477] [ 29.044703] The buggy address belongs to the object at ffff88800cecb740 [ 29.044703] which belongs to the cache vm_area_struct of size 168 [ 29.046274] The buggy address is located 88 bytes inside of [ 29.046274] freed 168-byte region [ffff88800cecb740, ffff88800cecb7e8) [ 29.047772] [ 29.047996] The buggy address belongs to the physical page: [ 29.048695] page:00000000002845cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcecb [ 29.049841] memcg:ffff88800e6afa01 [ 29.050295] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.050979] page_type: 0xffffffff() [ 29.051454] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.052426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6afa01 [ 29.053390] page dumped because: kasan: bad access detected [ 29.054097] [ 29.054327] Memory state around the buggy address: [ 29.054938] ffff88800cecb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.055829] ffff88800cecb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.056729] >ffff88800cecb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.057648] ^ [ 29.058175] ffff88800cecb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.059077] ffff88800cecb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.059973] ================================================================== [ 29.061188] Disabling lock debugging due to kernel taint [ 31.068170] BUG: Bad rss-counter state mm:000000003ce2bb88 type:MM_FILEPAGES val:33 [ 31.069240] BUG: Bad rss-counter state mm:000000003ce2bb88 type:MM_ANONPAGES val:22 [ 31.680804] BUG: Bad rss-counter state mm:00000000fcfc9da1 type:MM_FILEPAGES val:33 [ 31.682064] BUG: Bad rss-counter state mm:00000000fcfc9da1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46283' (ECDSA) to the list of known hosts. 2023/06/20 16:42:31 fuzzer started 2023/06/20 16:42:31 dialing manager at localhost:36067 2023/06/20 16:42:31 checking machine... 2023/06/20 16:42:31 checking revisions... [ 32.363725] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:42:31 testing simple program... [ 32.420506] cgroup: Unknown subsys name 'net' [ 32.455843] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:42:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f27b700 RCX=0000000000000000 RDX=1ffff11001f31a60 RSI=00000000000000e0 RDI=ffff88800f98d240 RBP=0000000000000009 RSP=ffff88800d9e7578 R8 =0000000000057000 R9 =ffff88806ce3965c R10=0000000000000000 R11=0000000000000001 R12=ffff88806ce395c0 R13=dffffc0000000000 R14=ffff88800f98d2c0 R15=ffff88800f98d240 RIP=ffffffff8125301c 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 00007f8ef7137900 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=00007f8ef65bd870 CR3=0000000008c72000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8def13e9412847b400000000000ae988 XMM05=c81b9374d1f780600000000000132a78 XMM06=c291bd5c70af25b90000000000131b18 XMM07=fb795ef6d65770560000000000121e00 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015c0b680 RSI=ffff8880097d8000 RDI=ffff88800fe47c48 RBP=0000000000000000 RSP=ffff88800fe47b08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800fe47c48 R13=dffffc0000000000 R14=0000000000008000 R15=0000000000000000 RIP=ffffffff81859654 RFL=00000293 [--S-A-C] 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 00007f663e760900 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=00007ffd60233000 CR3=000000000d5cc000 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