[ 24.024083] BUG: Bad rss-counter state mm:00000000a56ec846 type:MM_FILEPAGES val:33 [ 24.025479] BUG: Bad rss-counter state mm:00000000a56ec846 type:MM_ANONPAGES val:22 [ 24.176458] ================================================================== [ 24.177335] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.178222] Read of size 8 at addr ffff88800f0c1968 by task sshd/219 [ 24.178965] [ 24.179177] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.179990] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.181054] Call Trace: [ 24.181364] [ 24.181632] dump_stack_lvl+0x91/0xf0 [ 24.182104] print_report+0xcc/0x620 [ 24.182563] ? __virt_addr_valid+0x102/0x340 [ 24.183115] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.183701] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.184284] kasan_report+0xbe/0xf0 [ 24.184739] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.185364] vma_interval_tree_remove+0xc75/0xec0 [ 24.185930] vma_prepare+0xc54/0x11a0 [ 24.186378] __split_vma+0x5af/0x950 [ 24.186840] ? __pfx___split_vma+0x10/0x10 [ 24.187336] ? find_held_lock+0x2c/0x110 [ 24.187828] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.188359] ? lock_is_held_type+0x9f/0x120 [ 24.188882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.189489] ? mtree_range_walk+0x632/0x900 [ 24.190033] ? mas_walk+0x5c7/0x7c0 [ 24.190507] do_vmi_munmap+0x1f1/0x2b0 [ 24.191015] mmap_region+0x1f9/0x2660 [ 24.191495] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.192000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.192704] ? __pfx_lock_acquire+0x10/0x10 [ 24.193231] ? __pfx_mmap_region+0x10/0x10 [ 24.193748] ? security_mmap_addr+0x7d/0xa0 [ 24.194269] ? get_unmapped_area+0x1f5/0x3f0 [ 24.194826] do_mmap+0x854/0xf00 [ 24.195270] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.195766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.196325] ksys_mmap_pgoff+0x3af/0x500 [ 24.196829] do_syscall_64+0x3f/0x90 [ 24.197302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.197936] RIP: 0033:0x7f5f47af7d82 [ 24.198389] 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 [ 24.200498] RSP: 002b:00007fffa9456bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.201394] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f47af7d82 [ 24.202231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f46f31000 [ 24.203083] RBP: 00007f5f46f31000 R08: 0000000000000009 R09: 0000000000001000 [ 24.203915] R10: 0000000000000812 R11: 0000000000000206 R12: 000055faa877aec0 [ 24.204752] R13: 00007fffa9456bd0 R14: 00007fffa9456c00 R15: 00007fffa9456f60 [ 24.205596] [ 24.205893] [ 24.206104] Allocated by task 211: [ 24.206521] kasan_save_stack+0x22/0x50 [ 24.207030] kasan_set_track+0x25/0x30 [ 24.207521] __kasan_slab_alloc+0x59/0x70 [ 24.208038] kmem_cache_alloc+0x16b/0x370 [ 24.208546] vm_area_dup+0x20/0x160 [ 24.209000] __split_vma+0x170/0x950 [ 24.209477] split_vma+0xc6/0x110 [ 24.209915] mprotect_fixup+0x8d2/0xb30 [ 24.210414] do_mprotect_pkey+0x87e/0xd40 [ 24.210943] __x64_sys_mprotect+0x78/0xc0 [ 24.211461] do_syscall_64+0x3f/0x90 [ 24.211933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.212565] [ 24.212779] Freed by task 211: [ 24.213168] kasan_save_stack+0x22/0x50 [ 24.213662] kasan_set_track+0x25/0x30 [ 24.214154] kasan_save_free_info+0x2b/0x50 [ 24.214691] __kasan_slab_free+0x10a/0x190 [ 24.215194] kmem_cache_free+0x10d/0x4d0 [ 24.215676] rcu_core+0x8c8/0x2860 [ 24.216099] __do_softirq+0x1b7/0x7d4 [ 24.216549] [ 24.216758] Last potentially related work creation: [ 24.217317] kasan_save_stack+0x22/0x50 [ 24.217795] __kasan_record_aux_stack+0x8e/0xa0 [ 24.218333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.218947] remove_vma+0x139/0x170 [ 24.219371] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.219896] do_vmi_munmap+0x1f1/0x2b0 [ 24.220357] __vm_munmap+0x138/0x3a0 [ 24.220797] __x64_sys_munmap+0x59/0x80 [ 24.221268] do_syscall_64+0x3f/0x90 [ 24.221821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.222430] [ 24.222635] The buggy address belongs to the object at ffff88800f0c1910 [ 24.222635] which belongs to the cache vm_area_struct of size 168 [ 24.224032] The buggy address is located 88 bytes inside of [ 24.224032] freed 168-byte region [ffff88800f0c1910, ffff88800f0c19b8) [ 24.225387] [ 24.225599] The buggy address belongs to the physical page: [ 24.226247] page:000000003cf46f66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0c1 [ 24.227367] memcg:ffff88800ea6e401 [ 24.227826] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.228708] page_type: 0xffffffff() [ 24.229274] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393080 dead000000000005 [ 24.230435] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea6e401 [ 24.231576] page dumped because: kasan: bad access detected [ 24.232268] [ 24.232485] Memory state around the buggy address: [ 24.233058] ffff88800f0c1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.233908] ffff88800f0c1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.234782] >ffff88800f0c1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.235641] ^ [ 24.236415] ffff88800f0c1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.237253] ffff88800f0c1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.238113] ================================================================== [ 24.239151] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.945055] BUG: Bad rss-counter state mm:0000000043a3b3ac type:MM_FILEPAGES val:33 [ 26.946562] BUG: Bad rss-counter state mm:0000000043a3b3ac type:MM_ANONPAGES val:22 [ 27.431007] BUG: Bad rss-counter state mm:000000007aa2ae67 type:MM_FILEPAGES val:33 [ 27.432069] BUG: Bad rss-counter state mm:000000007aa2ae67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30736' (ECDSA) to the list of known hosts. 2023/06/21 04:15:03 fuzzer started 2023/06/21 04:15:04 dialing manager at localhost:36067 2023/06/21 04:15:04 checking machine... 2023/06/21 04:15:04 checking revisions... [ 28.191940] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:15:04 testing simple program... [ 28.236414] cgroup: Unknown subsys name 'net' [ 28.291079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:15:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f2d3d4084d0 CR3=000000000fe56000 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=2033303a35313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a35313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b30 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff888015fb0000 RSP=ffff88806cf09a40 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88806cf09a98 R11=1ffff1100d9e7479 R12=0000000000000000 R13=ffff88806cf09ac0 R14=ffff888015fb0000 R15=ffff88806cf09a98 RIP=ffffffff8451340a RFL=00000247 [---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 00007ffaa498b900 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=00007fffdc723000 CR3=0000000019c36000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000