[ 30.817773] BUG: Bad rss-counter state mm:00000000736bd264 type:MM_FILEPAGES val:33 [ 30.819001] BUG: Bad rss-counter state mm:00000000736bd264 type:MM_ANONPAGES val:22 [ 30.988571] ================================================================== [ 30.989521] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.990496] Read of size 8 at addr ffff88800d76c968 by task sshd/220 [ 30.991486] [ 30.991705] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.992577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.993666] Call Trace: [ 30.994075] [ 30.994419] dump_stack_lvl+0x91/0xf0 [ 30.995014] print_report+0xcc/0x620 [ 30.995601] ? __virt_addr_valid+0x102/0x340 [ 30.996269] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997017] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997777] kasan_report+0xbe/0xf0 [ 30.998362] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.999114] vma_interval_tree_remove+0xc75/0xec0 [ 30.999855] vma_prepare+0xc54/0x11a0 [ 31.000432] __split_vma+0x5af/0x950 [ 31.001006] ? __pfx___split_vma+0x10/0x10 [ 31.001685] ? find_held_lock+0x2c/0x110 [ 31.002329] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.002922] ? lock_is_held_type+0x9f/0x120 [ 31.003459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.004062] ? mtree_range_walk+0x632/0x900 [ 31.004632] ? mas_walk+0x5c7/0x7c0 [ 31.005130] do_vmi_munmap+0x1f1/0x2b0 [ 31.005647] mmap_region+0x1f9/0x2660 [ 31.006134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.006666] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.007402] ? __pfx_lock_acquire+0x10/0x10 [ 31.007941] ? __pfx_mmap_region+0x10/0x10 [ 31.008491] ? security_mmap_addr+0x7d/0xa0 [ 31.009043] ? get_unmapped_area+0x1f5/0x3f0 [ 31.009651] do_mmap+0x854/0xf00 [ 31.010112] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.010637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.011200] ksys_mmap_pgoff+0x3af/0x500 [ 31.011714] do_syscall_64+0x3f/0x90 [ 31.012208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.012863] RIP: 0033:0x7f5d898fcd82 [ 31.013320] 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 [ 31.015474] RSP: 002b:00007ffca948fe58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.016383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d898fcd82 [ 31.017221] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d88d36000 [ 31.018101] RBP: 00007f5d88d36000 R08: 0000000000000009 R09: 0000000000001000 [ 31.018970] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d0fff5ec0 [ 31.019846] R13: 00007ffca948fe70 R14: 00007ffca948fea0 R15: 00007ffca9490200 [ 31.020729] [ 31.021030] [ 31.021254] Allocated by task 213: [ 31.021711] kasan_save_stack+0x22/0x50 [ 31.022236] kasan_set_track+0x25/0x30 [ 31.022750] __kasan_slab_alloc+0x59/0x70 [ 31.023298] kmem_cache_alloc+0x16b/0x370 [ 31.023820] vm_area_dup+0x20/0x160 [ 31.024286] __split_vma+0x170/0x950 [ 31.024766] split_vma+0xc6/0x110 [ 31.025221] mprotect_fixup+0x8d2/0xb30 [ 31.025747] do_mprotect_pkey+0x87e/0xd40 [ 31.026294] __x64_sys_mprotect+0x78/0xc0 [ 31.026830] do_syscall_64+0x3f/0x90 [ 31.027319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.027970] [ 31.028192] Freed by task 213: [ 31.028597] kasan_save_stack+0x22/0x50 [ 31.029111] kasan_set_track+0x25/0x30 [ 31.029641] kasan_save_free_info+0x2b/0x50 [ 31.030201] __kasan_slab_free+0x10a/0x190 [ 31.030804] kmem_cache_free+0x10d/0x4d0 [ 31.031328] rcu_core+0x8c8/0x2860 [ 31.031789] __do_softirq+0x1b7/0x7d4 [ 31.032287] [ 31.032576] Last potentially related work creation: [ 31.033181] kasan_save_stack+0x22/0x50 [ 31.033717] __kasan_record_aux_stack+0x8e/0xa0 [ 31.034303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.034982] remove_vma+0x139/0x170 [ 31.035452] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.036004] do_vmi_munmap+0x1f1/0x2b0 [ 31.036505] __vm_munmap+0x138/0x3a0 [ 31.036981] __x64_sys_munmap+0x59/0x80 [ 31.037522] do_syscall_64+0x3f/0x90 [ 31.038018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038687] [ 31.038908] The buggy address belongs to the object at ffff88800d76c910 [ 31.038908] which belongs to the cache vm_area_struct of size 168 [ 31.040394] The buggy address is located 88 bytes inside of [ 31.040394] freed 168-byte region [ffff88800d76c910, ffff88800d76c9b8) [ 31.041795] [ 31.042015] The buggy address belongs to the physical page: [ 31.042706] page:00000000ffa5562a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd76c [ 31.043824] memcg:ffff88800b369c01 [ 31.044276] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.044919] page_type: 0xffffffff() [ 31.045369] raw: 0100000000000200 ffff8880087a0c80 ffffea0000372580 dead000000000008 [ 31.046299] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b369c01 [ 31.047209] page dumped because: kasan: bad access detected [ 31.047875] [ 31.048089] Memory state around the buggy address: [ 31.048667] ffff88800d76c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.049529] ffff88800d76c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.050391] >ffff88800d76c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.051238] ^ [ 31.052016] ffff88800d76c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.052861] ffff88800d76ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.053724] ================================================================== [ 31.054703] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.898755] BUG: Bad rss-counter state mm:00000000ef3b3188 type:MM_FILEPAGES val:33 [ 32.899910] BUG: Bad rss-counter state mm:00000000ef3b3188 type:MM_ANONPAGES val:22 [ 33.414760] BUG: Bad rss-counter state mm:00000000a05912cd type:MM_FILEPAGES val:33 [ 33.416008] BUG: Bad rss-counter state mm:00000000a05912cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56096' (ECDSA) to the list of known hosts. 2023/06/20 12:42:32 fuzzer started 2023/06/20 12:42:33 dialing manager at localhost:36067 2023/06/20 12:42:33 checking machine... 2023/06/20 12:42:33 checking revisions... [ 34.072436] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:42:33 testing simple program... [ 34.116384] cgroup: Unknown subsys name 'net' [ 34.185807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:42:32 Registers: info registers vcpu 0 RAX=ffffffff818475d2 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801474f701 RSI=ffff88801474f7f0 RDI=ffff88801474f7f0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff8613f412 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000021e7d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801474f7f8 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 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 00007f757b17a900 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=00007f757a5a3530 CR3=000000000c6ae000 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=4496ff260833171f00000000000ae988 XMM05=f30483071edcede10000000000132700 XMM06=76bdb0b0dcefddc90000000000131438 XMM07=fb795ef6d65770560000000000121940 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff844a4f03 RDX=ffff888015d70000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff84e39920 RSP=ffff88800f6e7cb0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=0000000000000000 R12=0000000000000003 R13=0000000000000005 R14=0000000000000003 R15=00007f6575143fff RIP=ffffffff814c02c5 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6574d7e900 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=00007f657511b31c CR3=0000000019e80000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000