[ 30.691199] BUG: Bad rss-counter state mm:00000000f9afa369 type:MM_FILEPAGES val:33 [ 30.692611] BUG: Bad rss-counter state mm:00000000f9afa369 type:MM_ANONPAGES val:22 [ 30.854712] ================================================================== [ 30.855646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856690] Read of size 8 at addr ffff88800e15db38 by task sshd/220 [ 30.857653] [ 30.857879] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858769] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859786] Call Trace: [ 30.860149] [ 30.860474] dump_stack_lvl+0x91/0xf0 [ 30.860974] print_report+0xcc/0x620 [ 30.861473] ? __virt_addr_valid+0x102/0x340 [ 30.862030] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862656] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863297] kasan_report+0xbe/0xf0 [ 30.863775] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864474] vma_interval_tree_remove+0xc75/0xec0 [ 30.865091] vma_prepare+0xc54/0x11a0 [ 30.865568] __split_vma+0x5af/0x950 [ 30.866050] ? __pfx___split_vma+0x10/0x10 [ 30.866584] ? find_held_lock+0x2c/0x110 [ 30.867107] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867671] ? lock_is_held_type+0x9f/0x120 [ 30.868271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868900] ? mtree_range_walk+0x632/0x900 [ 30.869455] ? mas_walk+0x5c7/0x7c0 [ 30.869961] do_vmi_munmap+0x1f1/0x2b0 [ 30.870478] mmap_region+0x1f9/0x2660 [ 30.870959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.871466] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.872235] ? __pfx_lock_acquire+0x10/0x10 [ 30.872778] ? __pfx_mmap_region+0x10/0x10 [ 30.873314] ? security_mmap_addr+0x7d/0xa0 [ 30.873844] ? get_unmapped_area+0x1f5/0x3f0 [ 30.874387] do_mmap+0x854/0xf00 [ 30.874832] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.875323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.875887] ksys_mmap_pgoff+0x3af/0x500 [ 30.876450] do_syscall_64+0x3f/0x90 [ 30.876942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877599] RIP: 0033:0x7fe528c7fd82 [ 30.878056] 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 [ 30.880247] RSP: 002b:00007ffd8005f168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.881163] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe528c7fd82 [ 30.882010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5280b9000 [ 30.882862] RBP: 00007fe5280b9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.883707] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba4c1a2d90 [ 30.884596] R13: 00007ffd8005f180 R14: 00007ffd8005f1b0 R15: 00007ffd8005f510 [ 30.885457] [ 30.885753] [ 30.885967] Allocated by task 213: [ 30.886402] kasan_save_stack+0x22/0x50 [ 30.886905] kasan_set_track+0x25/0x30 [ 30.887398] __kasan_slab_alloc+0x59/0x70 [ 30.887921] kmem_cache_alloc+0x16b/0x370 [ 30.888503] vm_area_dup+0x20/0x160 [ 30.888964] __split_vma+0x170/0x950 [ 30.889427] split_vma+0xc6/0x110 [ 30.889870] mprotect_fixup+0x8d2/0xb30 [ 30.890370] do_mprotect_pkey+0x87e/0xd40 [ 30.890891] __x64_sys_mprotect+0x78/0xc0 [ 30.891411] do_syscall_64+0x3f/0x90 [ 30.891888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.892580] [ 30.892800] Freed by task 213: [ 30.893195] kasan_save_stack+0x22/0x50 [ 30.893699] kasan_set_track+0x25/0x30 [ 30.894199] kasan_save_free_info+0x2b/0x50 [ 30.894731] __kasan_slab_free+0x10a/0x190 [ 30.895264] kmem_cache_free+0x10d/0x4d0 [ 30.895773] rcu_core+0x8c8/0x2860 [ 30.896276] __do_softirq+0x1b7/0x7d4 [ 30.896756] [ 30.896971] Last potentially related work creation: [ 30.897565] kasan_save_stack+0x22/0x50 [ 30.898138] __kasan_record_aux_stack+0x8e/0xa0 [ 30.898711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.899350] remove_vma+0x139/0x170 [ 30.899806] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.900407] do_vmi_munmap+0x1f1/0x2b0 [ 30.900893] __vm_munmap+0x138/0x3a0 [ 30.901363] __x64_sys_munmap+0x59/0x80 [ 30.901863] do_syscall_64+0x3f/0x90 [ 30.902340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902991] [ 30.903209] Second to last potentially related work creation: [ 30.903900] kasan_save_stack+0x22/0x50 [ 30.904446] __kasan_record_aux_stack+0x8e/0xa0 [ 30.905026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.905670] remove_vma+0x139/0x170 [ 30.906122] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.906689] do_vmi_munmap+0x1f1/0x2b0 [ 30.907174] mmap_region+0x1f9/0x2660 [ 30.907652] do_mmap+0x854/0xf00 [ 30.908097] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.908638] ksys_mmap_pgoff+0x3af/0x500 [ 30.909144] do_syscall_64+0x3f/0x90 [ 30.909623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910277] [ 30.910497] The buggy address belongs to the object at ffff88800e15dae0 [ 30.910497] which belongs to the cache vm_area_struct of size 168 [ 30.911967] The buggy address is located 88 bytes inside of [ 30.911967] freed 168-byte region [ffff88800e15dae0, ffff88800e15db88) [ 30.913403] [ 30.913626] The buggy address belongs to the physical page: [ 30.914307] page:000000003de95d04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe15d [ 30.915409] memcg:ffff88800bf18101 [ 30.915838] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.916607] page_type: 0xffffffff() [ 30.917064] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c680 dead000000000003 [ 30.918005] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf18101 [ 30.918912] page dumped because: kasan: bad access detected [ 30.919583] [ 30.919799] Memory state around the buggy address: [ 30.920439] ffff88800e15da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.921314] ffff88800e15da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.922180] >ffff88800e15db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.923042] ^ [ 30.923648] ffff88800e15db80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.924583] ffff88800e15dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.925443] ================================================================== [ 30.926405] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.649438] BUG: Bad rss-counter state mm:00000000f2d08010 type:MM_FILEPAGES val:33 [ 33.650621] BUG: Bad rss-counter state mm:00000000f2d08010 type:MM_ANONPAGES val:22 [ 34.058086] BUG: Bad rss-counter state mm:00000000fbf7a32a type:MM_FILEPAGES val:33 [ 34.059246] BUG: Bad rss-counter state mm:00000000fbf7a32a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16086' (ECDSA) to the list of known hosts. 2023/06/20 14:33:14 fuzzer started 2023/06/20 14:33:14 dialing manager at localhost:36067 2023/06/20 14:33:14 checking machine... 2023/06/20 14:33:14 checking revisions... [ 34.677723] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:33:14 testing simple program... [ 34.730125] cgroup: Unknown subsys name 'net' [ 34.768070] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:33:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e2fbed8 RCX=0000000000000000 RDX=ffff88800b389b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888016b47d90 RSP=ffff888016b47c90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=dffffc0000000000 R14=ffff8880098596b8 R15=0000000000000200 RIP=ffffffff814c0404 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 00007f310492f900 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=00007f3104ee6618 CR3=000000000fe84000 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=563412feff00545000000000000080fe 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fb4863e5b10 CR3=000000000e226000 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=2033313a33333a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a33333a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000