[ 55.277339] BUG: Bad rss-counter state mm:00000000a6e9066a type:MM_FILEPAGES val:33 [ 55.278504] BUG: Bad rss-counter state mm:00000000a6e9066a type:MM_ANONPAGES val:22 [ 55.446336] ================================================================== [ 55.447421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.448627] Read of size 8 at addr ffff888019cf4a50 by task sshd/220 [ 55.449520] [ 55.449779] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 55.451010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.452145] Call Trace: [ 55.452515] <TASK> [ 55.452847] dump_stack_lvl+0x91/0xf0 [ 55.453423] print_report+0xcc/0x620 [ 55.453995] ? __virt_addr_valid+0x102/0x340 [ 55.454648] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.455380] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.456117] kasan_report+0xbe/0xf0 [ 55.456694] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.457443] vma_interval_tree_remove+0xc75/0xec0 [ 55.458168] vma_prepare+0xc54/0x11a0 [ 55.458767] __split_vma+0x5af/0x950 [ 55.459332] ? __pfx___split_vma+0x10/0x10 [ 55.459962] ? find_held_lock+0x2c/0x110 [ 55.460581] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.461262] ? lock_is_held_type+0x9f/0x120 [ 55.461911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.462666] ? mtree_range_walk+0x632/0x900 [ 55.463333] ? mas_walk+0x5c7/0x7c0 [ 55.463899] do_vmi_munmap+0x1f1/0x2b0 [ 55.464489] mmap_region+0x1f9/0x2660 [ 55.465069] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.465696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.466585] ? __pfx_lock_acquire+0x10/0x10 [ 55.467228] ? __pfx_mmap_region+0x10/0x10 [ 55.467865] ? security_mmap_addr+0x7d/0xa0 [ 55.468501] ? get_unmapped_area+0x1f5/0x3f0 [ 55.469164] do_mmap+0x854/0xf00 [ 55.469699] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.470296] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.470990] ksys_mmap_pgoff+0x3af/0x500 [ 55.471600] do_syscall_64+0x3f/0x90 [ 55.472174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.472964] RIP: 0033:0x7fc26098ed82 [ 55.473519] 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 [ 55.476055] RSP: 002b:00007ffc4afc4c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.477136] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc26098ed82 [ 55.478138] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc25fdc8000 [ 55.479163] RBP: 00007fc25fdc8000 R08: 0000000000000009 R09: 0000000000001000 [ 55.480170] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637fdf5cf70 [ 55.481179] R13: 00007ffc4afc4c90 R14: 00007ffc4afc4cc0 R15: 00007ffc4afc5020 [ 55.482196] </TASK> [ 55.482565] [ 55.482822] Allocated by task 213: [ 55.483336] kasan_save_stack+0x22/0x50 [ 55.483942] kasan_set_track+0x25/0x30 [ 55.484532] __kasan_slab_alloc+0x59/0x70 [ 55.485157] kmem_cache_alloc+0x16b/0x370 [ 55.485774] vm_area_dup+0x20/0x160 [ 55.486318] __split_vma+0x170/0x950 [ 55.486886] split_vma+0xc6/0x110 [ 55.487407] mprotect_fixup+0x8d2/0xb30 [ 55.488015] do_mprotect_pkey+0x87e/0xd40 [ 55.488635] __x64_sys_mprotect+0x78/0xc0 [ 55.489264] do_syscall_64+0x3f/0x90 [ 55.489830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.490608] [ 55.490865] Freed by task 211: [ 55.491326] kasan_save_stack+0x22/0x50 [ 55.491928] kasan_set_track+0x25/0x30 [ 55.492519] kasan_save_free_info+0x2b/0x50 [ 55.493156] __kasan_slab_free+0x10a/0x190 [ 55.493787] kmem_cache_free+0x10d/0x4d0 [ 55.494397] rcu_core+0x8c8/0x2860 [ 55.494944] __do_softirq+0x1b7/0x7d4 [ 55.495511] [ 55.495768] Last potentially related work creation: [ 55.496469] kasan_save_stack+0x22/0x50 [ 55.497072] __kasan_record_aux_stack+0x8e/0xa0 [ 55.497751] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.498537] remove_vma+0x139/0x170 [ 55.499083] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.499752] do_vmi_munmap+0x1f1/0x2b0 [ 55.500342] __vm_munmap+0x138/0x3a0 [ 55.500896] __x64_sys_munmap+0x59/0x80 [ 55.501493] do_syscall_64+0x3f/0x90 [ 55.502063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.502845] [ 55.503105] Second to last potentially related work creation: [ 55.503940] kasan_save_stack+0x22/0x50 [ 55.504553] __kasan_record_aux_stack+0x8e/0xa0 [ 55.505235] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.506013] remove_vma+0x139/0x170 [ 55.506571] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.507245] do_vmi_munmap+0x1f1/0x2b0 [ 55.507825] mmap_region+0x1f9/0x2660 [ 55.508394] do_mmap+0x854/0xf00 [ 55.508913] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.509508] ksys_mmap_pgoff+0x3af/0x500 [ 55.510110] do_syscall_64+0x3f/0x90 [ 55.510708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.511488] [ 55.511751] The buggy address belongs to the object at ffff888019cf49f8 [ 55.511751] which belongs to the cache vm_area_struct of size 168 [ 55.513527] The buggy address is located 88 bytes inside of [ 55.513527] freed 168-byte region [ffff888019cf49f8, ffff888019cf4aa0) [ 55.515239] [ 55.515502] The buggy address belongs to the physical page: [ 55.516307] page:00000000e241a9e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cf4 [ 55.517629] memcg:ffff88800cb21901 [ 55.518148] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 55.519004] page_type: 0xffffffff() [ 55.519547] raw: 0100000000000200 ffff88800879fc80 ffffea00002611c0 000000000000000b [ 55.520662] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb21901 [ 55.521764] page dumped because: kasan: bad access detected [ 55.522589] [ 55.522847] Memory state around the buggy address: [ 55.523556] ffff888019cf4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.524577] ffff888019cf4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 55.525587] >ffff888019cf4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.526607] ^ [ 55.527425] ffff888019cf4a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 55.528424] ffff888019cf4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.529426] ================================================================== [ 55.530622] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 57.135213] BUG: Bad rss-counter state mm:00000000122d2479 type:MM_FILEPAGES val:33 [ 57.135771] BUG: Bad rss-counter state mm:00000000122d2479 type:MM_ANONPAGES val:22 [ 57.525785] BUG: Bad rss-counter state mm:000000004eb0f760 type:MM_FILEPAGES val:33 [ 57.526576] BUG: Bad rss-counter state mm:000000004eb0f760 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23384' (ECDSA) to the list of known hosts. 2023/06/20 04:09:09 fuzzer started 2023/06/20 04:09:09 dialing manager at localhost:44161 2023/06/20 04:09:09 checking machine... 2023/06/20 04:09:09 checking revisions... [ 58.202718] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:09:09 testing simple program... [ 58.258080] cgroup: Unknown subsys name 'net' [ 58.317516] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:08:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018ff78d8 RCX=0000000000000001 RDX=1ffff110031fef1d RSI=ffff888018ff7c20 RDI=ffff888018ff78e8 RBP=ffff888018ff7c20 RSP=ffff888018ff7830 R8 =ffffffff8613751e R9 =ffff888018ff7918 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000008 R13=ffff888018ff0000 R14=ffff888018ff7c28 R15=ffff888018ff78d8 RIP=ffffffff81130468 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 00007f497fb1a900 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=00007fffef57c000 CR3=0000000009854000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f107108b320 CR3=0000000019f6c000 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=2039303a39303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000