[ 36.083996] BUG: Bad rss-counter state mm:000000004014f38a type:MM_FILEPAGES val:33 [ 36.085282] BUG: Bad rss-counter state mm:000000004014f38a type:MM_ANONPAGES val:22 [ 36.212367] ================================================================== [ 36.213045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.213753] Read of size 8 at addr ffff88801bc65a50 by task sshd/219 [ 36.214317] [ 36.214478] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.215116] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.215833] Call Trace: [ 36.216067] [ 36.216282] dump_stack_lvl+0x91/0xf0 [ 36.216643] print_report+0xcc/0x620 [ 36.217105] ? __virt_addr_valid+0x102/0x340 [ 36.217507] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.217975] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.218426] kasan_report+0xbe/0xf0 [ 36.218771] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.219239] vma_interval_tree_remove+0xc75/0xec0 [ 36.219684] vma_prepare+0xc54/0x11a0 [ 36.220038] __split_vma+0x5af/0x950 [ 36.220383] ? __pfx___split_vma+0x10/0x10 [ 36.220775] ? find_held_lock+0x2c/0x110 [ 36.221156] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.221575] ? lock_is_held_type+0x9f/0x120 [ 36.221993] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.222442] ? mtree_range_walk+0x632/0x900 [ 36.222859] ? mas_walk+0x5c7/0x7c0 [ 36.223216] do_vmi_munmap+0x1f1/0x2b0 [ 36.223600] mmap_region+0x1f9/0x2660 [ 36.223963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.224342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.224882] ? __pfx_lock_acquire+0x10/0x10 [ 36.225269] ? __pfx_mmap_region+0x10/0x10 [ 36.225688] ? security_mmap_addr+0x7d/0xa0 [ 36.226087] ? get_unmapped_area+0x1f5/0x3f0 [ 36.226489] do_mmap+0x854/0xf00 [ 36.226817] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.227184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.227600] ksys_mmap_pgoff+0x3af/0x500 [ 36.227973] do_syscall_64+0x3f/0x90 [ 36.228319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.228802] RIP: 0033:0x7f4845937d82 [ 36.229142] 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 [ 36.230722] RSP: 002b:00007ffc0868e598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.231372] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4845937d82 [ 36.231988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4844d71000 [ 36.232618] RBP: 00007f4844d71000 R08: 0000000000000009 R09: 0000000000001000 [ 36.233257] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a806af5ec0 [ 36.233920] R13: 00007ffc0868e5b0 R14: 00007ffc0868e5e0 R15: 00007ffc0868e940 [ 36.234566] [ 36.234788] [ 36.234951] Allocated by task 211: [ 36.235286] kasan_save_stack+0x22/0x50 [ 36.235667] kasan_set_track+0x25/0x30 [ 36.236031] __kasan_slab_alloc+0x59/0x70 [ 36.236427] kmem_cache_alloc+0x16b/0x370 [ 36.236820] vm_area_dup+0x20/0x160 [ 36.237171] __split_vma+0x170/0x950 [ 36.237517] split_vma+0xc6/0x110 [ 36.237847] mprotect_fixup+0x8d2/0xb30 [ 36.238220] do_mprotect_pkey+0x87e/0xd40 [ 36.238599] __x64_sys_mprotect+0x78/0xc0 [ 36.238982] do_syscall_64+0x3f/0x90 [ 36.239331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.239815] [ 36.239978] Freed by task 13: [ 36.240270] kasan_save_stack+0x22/0x50 [ 36.240651] kasan_set_track+0x25/0x30 [ 36.241005] kasan_save_free_info+0x2b/0x50 [ 36.241406] __kasan_slab_free+0x10a/0x190 [ 36.241831] kmem_cache_free+0x10d/0x4d0 [ 36.242212] rcu_core+0x8c8/0x2860 [ 36.242551] __do_softirq+0x1b7/0x7d4 [ 36.242918] [ 36.243080] Last potentially related work creation: [ 36.243509] kasan_save_stack+0x22/0x50 [ 36.243873] __kasan_record_aux_stack+0x8e/0xa0 [ 36.244310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.244772] remove_vma+0x139/0x170 [ 36.245100] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.245506] do_vmi_munmap+0x1f1/0x2b0 [ 36.245877] __vm_munmap+0x138/0x3a0 [ 36.246227] __x64_sys_munmap+0x59/0x80 [ 36.246594] do_syscall_64+0x3f/0x90 [ 36.246946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.247439] [ 36.247604] The buggy address belongs to the object at ffff88801bc659f8 [ 36.247604] which belongs to the cache vm_area_struct of size 168 [ 36.248711] The buggy address is located 88 bytes inside of [ 36.248711] freed 168-byte region [ffff88801bc659f8, ffff88801bc65aa0) [ 36.249751] [ 36.249910] The buggy address belongs to the physical page: [ 36.250400] page:000000001a55d3fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc65 [ 36.251229] memcg:ffff88801bc66001 [ 36.251547] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.252039] page_type: 0xffffffff() [ 36.252390] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.253083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc66001 [ 36.253796] page dumped because: kasan: bad access detected [ 36.254264] [ 36.254419] Memory state around the buggy address: [ 36.254857] ffff88801bc65900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.255508] ffff88801bc65980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.256141] >ffff88801bc65a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.256782] ^ [ 36.257299] ffff88801bc65a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.257925] ffff88801bc65b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.258552] ================================================================== [ 36.259330] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.629738] BUG: Bad rss-counter state mm:00000000cf1de708 type:MM_FILEPAGES val:33 [ 38.630726] BUG: Bad rss-counter state mm:00000000cf1de708 type:MM_ANONPAGES val:22 [ 39.097716] BUG: Bad rss-counter state mm:00000000a1eca8a6 type:MM_FILEPAGES val:33 [ 39.098970] BUG: Bad rss-counter state mm:00000000a1eca8a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42139' (ECDSA) to the list of known hosts. 2023/06/20 06:00:49 fuzzer started 2023/06/20 06:00:49 dialing manager at localhost:44161 2023/06/20 06:00:49 checking machine... 2023/06/20 06:00:49 checking revisions... [ 39.766876] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:00:49 testing simple program... [ 39.803552] cgroup: Unknown subsys name 'net' [ 39.852770] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:00:45 Registers: info registers vcpu 0 RAX=ffffffff864b0247 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888015faf8e0 RSP=ffff888015faf818 R8 =ffffffff864b024a R9 =ffff888015faf8c8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888015faf8e8 R13=ffff888015faf8d0 R14=ffff888015faff48 R15=ffff888015faf888 RIP=ffffffff81131767 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 00007f1b49e04900 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=00007f1b4a3bb618 CR3=00000000168b8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fe90d5a6a50 CR3=0000000015e90000 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=2039343a30303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a30303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000