[ 31.025938] BUG: Bad rss-counter state mm:000000005dd12065 type:MM_FILEPAGES val:33 [ 31.027125] BUG: Bad rss-counter state mm:000000005dd12065 type:MM_ANONPAGES val:22 [ 31.189428] ================================================================== [ 31.190350] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.191285] Read of size 8 at addr ffff88800ed24968 by task sshd/220 [ 31.192058] [ 31.192278] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.193313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.194290] Call Trace: [ 31.194609] [ 31.194892] dump_stack_lvl+0x91/0xf0 [ 31.195382] print_report+0xcc/0x620 [ 31.195867] ? __virt_addr_valid+0x102/0x340 [ 31.196422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197061] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197678] kasan_report+0xbe/0xf0 [ 31.198154] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198775] vma_interval_tree_remove+0xc75/0xec0 [ 31.199378] vma_prepare+0xc54/0x11a0 [ 31.199855] __split_vma+0x5af/0x950 [ 31.200336] ? __pfx___split_vma+0x10/0x10 [ 31.200865] ? find_held_lock+0x2c/0x110 [ 31.201394] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.201963] ? lock_is_held_type+0x9f/0x120 [ 31.202506] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.203117] ? mtree_range_walk+0x632/0x900 [ 31.203670] ? mas_walk+0x5c7/0x7c0 [ 31.204146] do_vmi_munmap+0x1f1/0x2b0 [ 31.204635] mmap_region+0x1f9/0x2660 [ 31.205140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.205647] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.206354] ? __pfx_lock_acquire+0x10/0x10 [ 31.206900] ? __pfx_mmap_region+0x10/0x10 [ 31.207424] ? security_mmap_addr+0x7d/0xa0 [ 31.207956] ? get_unmapped_area+0x1f5/0x3f0 [ 31.208501] do_mmap+0x854/0xf00 [ 31.208949] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.209450] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.210008] ksys_mmap_pgoff+0x3af/0x500 [ 31.210517] do_syscall_64+0x3f/0x90 [ 31.210996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211641] RIP: 0033:0x7fa12cd3fd82 [ 31.212098] 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 [ 31.214220] RSP: 002b:00007ffcff8ca7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.215122] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa12cd3fd82 [ 31.215966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa12c179000 [ 31.216806] RBP: 00007fa12c179000 R08: 0000000000000009 R09: 0000000000001000 [ 31.217668] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630a5277ec0 [ 31.218516] R13: 00007ffcff8ca7f0 R14: 00007ffcff8ca820 R15: 00007ffcff8cab80 [ 31.219363] [ 31.219652] [ 31.219868] Allocated by task 213: [ 31.220294] kasan_save_stack+0x22/0x50 [ 31.220799] kasan_set_track+0x25/0x30 [ 31.221299] __kasan_slab_alloc+0x59/0x70 [ 31.221824] kmem_cache_alloc+0x16b/0x370 [ 31.222339] vm_area_dup+0x20/0x160 [ 31.222787] __split_vma+0x170/0x950 [ 31.223267] split_vma+0xc6/0x110 [ 31.223710] mprotect_fixup+0x8d2/0xb30 [ 31.224211] do_mprotect_pkey+0x87e/0xd40 [ 31.224733] __x64_sys_mprotect+0x78/0xc0 [ 31.225274] do_syscall_64+0x3f/0x90 [ 31.225743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226389] [ 31.226607] Freed by task 213: [ 31.227002] kasan_save_stack+0x22/0x50 [ 31.227508] kasan_set_track+0x25/0x30 [ 31.228002] kasan_save_free_info+0x2b/0x50 [ 31.228545] __kasan_slab_free+0x10a/0x190 [ 31.229092] kmem_cache_free+0x10d/0x4d0 [ 31.229610] rcu_core+0x8c8/0x2860 [ 31.230060] __do_softirq+0x1b7/0x7d4 [ 31.230541] [ 31.230757] Last potentially related work creation: [ 31.231344] kasan_save_stack+0x22/0x50 [ 31.231848] __kasan_record_aux_stack+0x8e/0xa0 [ 31.232425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.233077] remove_vma+0x139/0x170 [ 31.233528] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.234082] do_vmi_munmap+0x1f1/0x2b0 [ 31.234638] __vm_munmap+0x138/0x3a0 [ 31.235105] __x64_sys_munmap+0x59/0x80 [ 31.235602] do_syscall_64+0x3f/0x90 [ 31.236076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.236722] [ 31.236948] Second to last potentially related work creation: [ 31.237626] kasan_save_stack+0x22/0x50 [ 31.238126] __kasan_record_aux_stack+0x8e/0xa0 [ 31.238697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.239340] remove_vma+0x139/0x170 [ 31.239789] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.240347] do_vmi_munmap+0x1f1/0x2b0 [ 31.240833] mmap_region+0x1f9/0x2660 [ 31.241315] do_mmap+0x854/0xf00 [ 31.241748] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.242241] ksys_mmap_pgoff+0x3af/0x500 [ 31.242748] do_syscall_64+0x3f/0x90 [ 31.243228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243867] [ 31.244090] The buggy address belongs to the object at ffff88800ed24910 [ 31.244090] which belongs to the cache vm_area_struct of size 168 [ 31.245596] The buggy address is located 88 bytes inside of [ 31.245596] freed 168-byte region [ffff88800ed24910, ffff88800ed249b8) [ 31.247012] [ 31.247227] The buggy address belongs to the physical page: [ 31.247905] page:00000000e21570d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed24 [ 31.248995] memcg:ffff88800e430e01 [ 31.249424] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.250070] page_type: 0xffffffff() [ 31.250530] raw: 0100000000000200 ffff88800879fc80 ffffea0000650940 dead000000000004 [ 31.251458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e430e01 [ 31.252364] page dumped because: kasan: bad access detected [ 31.253049] [ 31.253267] Memory state around the buggy address: [ 31.253853] ffff88800ed24800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.254715] ffff88800ed24880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.255569] >ffff88800ed24900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.256427] ^ [ 31.257226] ffff88800ed24980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.258078] ffff88800ed24a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.258932] ================================================================== [ 31.259838] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.605276] BUG: Bad rss-counter state mm:00000000dc413ac3 type:MM_FILEPAGES val:33 [ 33.606279] BUG: Bad rss-counter state mm:00000000dc413ac3 type:MM_ANONPAGES val:22 [ 33.985091] BUG: Bad rss-counter state mm:00000000d9d067c9 type:MM_FILEPAGES val:33 [ 33.986107] BUG: Bad rss-counter state mm:00000000d9d067c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45137' (ECDSA) to the list of known hosts. 2023/06/19 13:58:18 fuzzer started 2023/06/19 13:58:19 dialing manager at localhost:44161 2023/06/19 13:58:19 checking machine... 2023/06/19 13:58:19 checking revisions... [ 34.726312] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:58:19 testing simple program... [ 34.780387] cgroup: Unknown subsys name 'net' [ 34.837532] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:58:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8368501f RDX=ffff888016c43680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800b39eb40 RSP=ffff8880161a7af0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000002 R11=00000b5c00000b5c R12=ffff88800b39ec1c R13=ffff88800b39eb40 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff814c07e4 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 00007faeae779900 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=00007faeaed30618 CR3=0000000016066000 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=2038313a38353a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a38353a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fc0b4a1c0e0 CR3=000000000d7ac000 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=2a20a4840d56d9bcf74ff7c3c2af959f XMM02=ec2efd57dc4c00df000000000011c1a8 XMM03=660e416861a7e7b5000000000011c278 XMM04=7abbfdc8264a874800000000000ae988 XMM05=19e9129bd510f2350000000000133c98 XMM06=a31171e4d628f6090000000000132708 XMM07=e042d86d42eb936e00000000001232e8 XMM08=660e416861a7e7b5000000000011c278 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000