[ 24.017791] BUG: Bad rss-counter state mm:00000000cc62ce8c type:MM_FILEPAGES val:33 [ 24.019010] BUG: Bad rss-counter state mm:00000000cc62ce8c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.167048] ================================================================== [ 24.167982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.168939] Read of size 8 at addr ffff888016a3a058 by task sshd/220 [ 24.169738] [ 24.169964] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.171060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.172065] Call Trace: [ 24.172392] [ 24.172686] dump_stack_lvl+0x91/0xf0 [ 24.173198] print_report+0xcc/0x620 [ 24.173691] ? __virt_addr_valid+0x102/0x340 [ 24.174257] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.174919] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.175564] kasan_report+0xbe/0xf0 [ 24.176046] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.176694] vma_interval_tree_remove+0xc75/0xec0 [ 24.177302] vma_prepare+0xc54/0x11a0 [ 24.177785] __split_vma+0x5af/0x950 [ 24.178264] ? __pfx___split_vma+0x10/0x10 [ 24.178805] ? find_held_lock+0x2c/0x110 [ 24.179329] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.179896] ? lock_is_held_type+0x9f/0x120 [ 24.180436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.181048] ? mtree_range_walk+0x632/0x900 [ 24.181608] ? mas_walk+0x5c7/0x7c0 [ 24.182089] do_vmi_munmap+0x1f1/0x2b0 [ 24.182590] mmap_region+0x1f9/0x2660 [ 24.183093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.183608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.184324] ? __pfx_lock_acquire+0x10/0x10 [ 24.184873] ? __pfx_mmap_region+0x10/0x10 [ 24.185408] ? security_mmap_addr+0x7d/0xa0 [ 24.185946] ? get_unmapped_area+0x1f5/0x3f0 [ 24.186509] do_mmap+0x854/0xf00 [ 24.186974] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.187474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.188051] ksys_mmap_pgoff+0x3af/0x500 [ 24.188561] do_syscall_64+0x3f/0x90 [ 24.189043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.189690] RIP: 0033:0x7f8fe4386d82 [ 24.190161] 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 [ 24.192321] RSP: 002b:00007ffde3b60958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.193232] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fe4386d82 [ 24.194094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fe37c0000 [ 24.194961] RBP: 00007f8fe37c0000 R08: 0000000000000009 R09: 0000000000001000 [ 24.195812] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dae7ee8f70 [ 24.196666] R13: 00007ffde3b60970 R14: 00007ffde3b609a0 R15: 00007ffde3b60d00 [ 24.197537] [ 24.197835] [ 24.198057] Allocated by task 213: [ 24.198489] kasan_save_stack+0x22/0x50 [ 24.199018] kasan_set_track+0x25/0x30 [ 24.199516] __kasan_slab_alloc+0x59/0x70 [ 24.200050] kmem_cache_alloc+0x16b/0x370 [ 24.200570] vm_area_dup+0x20/0x160 [ 24.201028] __split_vma+0x170/0x950 [ 24.201501] split_vma+0xc6/0x110 [ 24.201944] mprotect_fixup+0x8d2/0xb30 [ 24.202450] do_mprotect_pkey+0x87e/0xd40 [ 24.202997] __x64_sys_mprotect+0x78/0xc0 [ 24.203521] do_syscall_64+0x3f/0x90 [ 24.204010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.204655] [ 24.204870] Freed by task 213: [ 24.205275] kasan_save_stack+0x22/0x50 [ 24.205794] kasan_set_track+0x25/0x30 [ 24.206293] kasan_save_free_info+0x2b/0x50 [ 24.206852] __kasan_slab_free+0x10a/0x190 [ 24.207389] kmem_cache_free+0x10d/0x4d0 [ 24.207900] rcu_core+0x8c8/0x2860 [ 24.208352] __do_softirq+0x1b7/0x7d4 [ 24.208830] [ 24.209047] Last potentially related work creation: [ 24.209635] kasan_save_stack+0x22/0x50 [ 24.210150] __kasan_record_aux_stack+0x8e/0xa0 [ 24.210743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.211398] remove_vma+0x139/0x170 [ 24.211929] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.212491] do_vmi_munmap+0x1f1/0x2b0 [ 24.212979] __vm_munmap+0x138/0x3a0 [ 24.213451] __x64_sys_munmap+0x59/0x80 [ 24.213951] do_syscall_64+0x3f/0x90 [ 24.214428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.215096] [ 24.215312] The buggy address belongs to the object at ffff888016a3a000 [ 24.215312] which belongs to the cache vm_area_struct of size 168 [ 24.216794] The buggy address is located 88 bytes inside of [ 24.216794] freed 168-byte region [ffff888016a3a000, ffff888016a3a0a8) [ 24.218210] [ 24.218432] The buggy address belongs to the physical page: [ 24.219115] page:000000002e56d7f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a3a [ 24.220228] memcg:ffff88800f35b501 [ 24.220663] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.221309] page_type: 0xffffffff() [ 24.221763] raw: 0100000000000200 ffff88800879fc80 ffffea00003b7140 dead000000000004 [ 24.222697] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f35b501 [ 24.223609] page dumped because: kasan: bad access detected [ 24.224285] [ 24.224511] Memory state around the buggy address: [ 24.225089] ffff888016a39f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.225964] ffff888016a39f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.226845] >ffff888016a3a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.227700] ^ [ 24.228438] ffff888016a3a080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.229303] ffff888016a3a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.230156] ================================================================== [ 24.231190] Disabling lock debugging due to kernel taint [ 26.038433] BUG: Bad rss-counter state mm:000000000d52c14d type:MM_FILEPAGES val:33 [ 26.039845] BUG: Bad rss-counter state mm:000000000d52c14d type:MM_ANONPAGES val:22 [ 26.447792] BUG: Bad rss-counter state mm:0000000001312dcc type:MM_FILEPAGES val:33 [ 26.448828] BUG: Bad rss-counter state mm:0000000001312dcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47495' (ECDSA) to the list of known hosts. 2023/06/19 23:53:01 fuzzer started 2023/06/19 23:53:01 dialing manager at localhost:44161 2023/06/19 23:53:01 checking machine... 2023/06/19 23:53:01 checking revisions... [ 27.160566] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:53:01 testing simple program... [ 27.207868] cgroup: Unknown subsys name 'net' [ 27.248664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:53:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=000055bc0d087000 CR3=000000000eee0000 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=8a384e641309d3bd83244d1b6cdb6b58 XMM02=87883d401873d07a5df9b4cd2a03315b XMM03=62b14192e6a2897cd1eca772b025e971 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001e14ec0 RSI=ffffffff83684ee6 RDI=ffff88800f0a75a8 RBP=ffff88800f0a7600 RSP=ffff88800f0a7538 R8 =0000000000000001 R9 =ffff88800f0a75e8 R10=0000000000038001 R11=000000000008b61a R12=ffff88800f0a7670 R13=0000000000000000 R14=ffff88800f401b40 R15=ffff88800f0a75a8 RIP=ffffffff8113062c 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 00007f278e966700 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=00007fea2c26c3b0 CR3=000000000f16c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031303a3335 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303536 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000