[ 26.449243] BUG: Bad rss-counter state mm:000000004d160074 type:MM_FILEPAGES val:33 [ 26.450483] BUG: Bad rss-counter state mm:000000004d160074 type:MM_ANONPAGES val:22 [ 26.485535] ================================================================== [ 26.486220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.486940] Read of size 8 at addr ffff888016c78b38 by task sshd/218 [ 26.487534] [ 26.487699] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.488349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.489096] Call Trace: [ 26.489339] [ 26.489556] dump_stack_lvl+0x91/0xf0 [ 26.490065] print_report+0xcc/0x620 [ 26.490437] ? __virt_addr_valid+0x102/0x340 [ 26.490861] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.491328] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.491801] kasan_report+0xbe/0xf0 [ 26.492502] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.493240] vma_interval_tree_remove+0xc75/0xec0 [ 26.493963] vma_prepare+0xc54/0x11a0 [ 26.494538] __split_vma+0x5af/0x950 [ 26.495116] ? __pfx___split_vma+0x10/0x10 [ 26.495797] ? find_held_lock+0x2c/0x110 [ 26.496462] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.497175] ? lock_is_held_type+0x9f/0x120 [ 26.497864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.498635] ? mtree_range_walk+0x632/0x900 [ 26.499364] ? mas_walk+0x5c7/0x7c0 [ 26.499965] do_vmi_munmap+0x1f1/0x2b0 [ 26.500585] mmap_region+0x1f9/0x2660 [ 26.501204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.501856] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.502803] ? __pfx_lock_acquire+0x10/0x10 [ 26.503468] ? __pfx_mmap_region+0x10/0x10 [ 26.504056] ? security_mmap_addr+0x7d/0xa0 [ 26.504646] ? get_unmapped_area+0x1f5/0x3f0 [ 26.505254] do_mmap+0x854/0xf00 [ 26.505741] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.506287] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.506916] ksys_mmap_pgoff+0x3af/0x500 [ 26.507484] do_syscall_64+0x3f/0x90 [ 26.508012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.508733] RIP: 0033:0x7f57927c5d82 [ 26.509248] 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 [ 26.511661] RSP: 002b:00007ffde684d2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.512683] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57927c5d82 [ 26.513637] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5791bff000 [ 26.514581] RBP: 00007f5791bff000 R08: 0000000000000009 R09: 0000000000001000 [ 26.515482] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559dd4420ec0 [ 26.516442] R13: 00007ffde684d310 R14: 00007ffde684d340 R15: 00007ffde684d6a0 [ 26.517434] [ 26.517765] [ 26.518007] Allocated by task 211: [ 26.518489] kasan_save_stack+0x22/0x50 [ 26.519088] kasan_set_track+0x25/0x30 [ 26.519650] __kasan_slab_alloc+0x59/0x70 [ 26.520213] kmem_cache_alloc+0x16b/0x370 [ 26.520780] vm_area_dup+0x20/0x160 [ 26.521281] __split_vma+0x170/0x950 [ 26.521788] split_vma+0xc6/0x110 [ 26.522271] mprotect_fixup+0x8d2/0xb30 [ 26.522795] do_mprotect_pkey+0x87e/0xd40 [ 26.523327] __x64_sys_mprotect+0x78/0xc0 [ 26.523899] do_syscall_64+0x3f/0x90 [ 26.524420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.525131] [ 26.525365] Freed by task 19: [ 26.525789] kasan_save_stack+0x22/0x50 [ 26.526334] kasan_set_track+0x25/0x30 [ 26.526877] kasan_save_free_info+0x2b/0x50 [ 26.527464] __kasan_slab_free+0x10a/0x190 [ 26.528052] kmem_cache_free+0x10d/0x4d0 [ 26.528612] rcu_core+0x8c8/0x2860 [ 26.529090] __do_softirq+0x1b7/0x7d4 [ 26.529622] [ 26.529860] Last potentially related work creation: [ 26.530500] kasan_save_stack+0x22/0x50 [ 26.531071] __kasan_record_aux_stack+0x8e/0xa0 [ 26.531697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.532398] remove_vma+0x139/0x170 [ 26.532845] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.533414] do_vmi_munmap+0x1f1/0x2b0 [ 26.533945] __vm_munmap+0x138/0x3a0 [ 26.534464] __x64_sys_munmap+0x59/0x80 [ 26.535017] do_syscall_64+0x3f/0x90 [ 26.535534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.536237] [ 26.536471] The buggy address belongs to the object at ffff888016c78ae0 [ 26.536471] which belongs to the cache vm_area_struct of size 168 [ 26.538019] The buggy address is located 88 bytes inside of [ 26.538019] freed 168-byte region [ffff888016c78ae0, ffff888016c78b88) [ 26.539586] [ 26.539828] The buggy address belongs to the physical page: [ 26.540549] page:00000000f74fbcf9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c78 [ 26.541684] memcg:ffff88800f1e8801 [ 26.542160] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.542949] page_type: 0xffffffff() [ 26.543443] raw: 0100000000000200 ffff88800879fc80 ffffea0000262340 000000000000000b [ 26.544461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1e8801 [ 26.545372] page dumped because: kasan: bad access detected [ 26.546116] [ 26.546360] Memory state around the buggy address: [ 26.547014] ffff888016c78a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.547973] ffff888016c78a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 26.548877] >ffff888016c78b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.549783] ^ [ 26.550460] ffff888016c78b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 26.551439] ffff888016c78c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 26.552391] ================================================================== [ 26.553362] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.415173] BUG: Bad rss-counter state mm:0000000018fdfaa5 type:MM_FILEPAGES val:33 [ 28.416493] BUG: Bad rss-counter state mm:0000000018fdfaa5 type:MM_ANONPAGES val:22 [ 29.025551] BUG: Bad rss-counter state mm:00000000b70c8485 type:MM_FILEPAGES val:33 [ 29.026544] BUG: Bad rss-counter state mm:00000000b70c8485 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56051' (ECDSA) to the list of known hosts. 2023/06/20 04:18:53 fuzzer started 2023/06/20 04:18:53 dialing manager at localhost:44161 2023/06/20 04:18:53 checking machine... 2023/06/20 04:18:53 checking revisions... [ 29.658453] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:18:53 testing simple program... [ 29.703263] cgroup: Unknown subsys name 'net' [ 29.754096] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:18:50 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=00007f094d4cc680 CR3=000000000c95c000 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=f00379bc721e97bb894f43d2486ad9a4 XMM02=ec2efd57dc4c00df000000000011c808 XMM03=9921b88c786c8efa000000000011c8d8 XMM04=c9f4603652ad488900000000000ae988 XMM05=5fbf324b071ba81500000000001343d8 XMM06=751b9502027dc0b90000000000132f00 XMM07=fb795ef6d657705600000000001236c8 XMM08=2c67c8bc2e329bc3000000000011c878 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000018 RBX=ffff888012d7c528 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888012d7c560 RBP=ffff888012d76c58 RSP=ffff88801788f908 R8 =0000000000000001 R9 =ffffed1002f11f15 R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88801b249b00 R14=ffffffff81c63f2c R15=0000000000000000 RIP=ffffffff8184638b RFL=00000046 [---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 00007f9c47212700 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=00007f21a39f1650 CR3=000000000e212000 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=2033353a38313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a38313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000