[ 49.055680] BUG: Bad rss-counter state mm:00000000f0f532d8 type:MM_FILEPAGES val:33 [ 49.056869] BUG: Bad rss-counter state mm:00000000f0f532d8 type:MM_ANONPAGES val:22 [ 49.215951] ================================================================== [ 49.217059] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.218193] Read of size 8 at addr ffff88800e0eed08 by task sshd/220 [ 49.219262] [ 49.219483] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.220356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.221365] Call Trace: [ 49.221689] [ 49.221982] dump_stack_lvl+0x91/0xf0 [ 49.222481] print_report+0xcc/0x620 [ 49.222991] ? __virt_addr_valid+0x102/0x340 [ 49.223552] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.224175] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.224799] kasan_report+0xbe/0xf0 [ 49.225294] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.225918] vma_interval_tree_remove+0xc75/0xec0 [ 49.226533] vma_prepare+0xc54/0x11a0 [ 49.227039] __split_vma+0x5af/0x950 [ 49.227527] ? __pfx___split_vma+0x10/0x10 [ 49.228056] ? find_held_lock+0x2c/0x110 [ 49.228593] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.229163] ? lock_is_held_type+0x9f/0x120 [ 49.229706] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.230319] ? mtree_range_walk+0x632/0x900 [ 49.230884] ? mas_walk+0x5c7/0x7c0 [ 49.231367] do_vmi_munmap+0x1f1/0x2b0 [ 49.231874] mmap_region+0x1f9/0x2660 [ 49.232371] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.232883] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.233607] ? __pfx_lock_acquire+0x10/0x10 [ 49.234146] ? __pfx_mmap_region+0x10/0x10 [ 49.234681] ? security_mmap_addr+0x7d/0xa0 [ 49.235226] ? get_unmapped_area+0x1f5/0x3f0 [ 49.235778] do_mmap+0x854/0xf00 [ 49.236227] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.236728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.237302] ksys_mmap_pgoff+0x3af/0x500 [ 49.237810] do_syscall_64+0x3f/0x90 [ 49.238289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.238958] RIP: 0033:0x7f86eebf7d82 [ 49.239417] 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 [ 49.241599] RSP: 002b:00007ffd320f5bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.242529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86eebf7d82 [ 49.243402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86ee031000 [ 49.244261] RBP: 00007f86ee031000 R08: 0000000000000009 R09: 0000000000001000 [ 49.245140] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eee0b5ab20 [ 49.246003] R13: 00007ffd320f5bf0 R14: 00007ffd320f5c20 R15: 00007ffd320f5f80 [ 49.246880] [ 49.247179] [ 49.247405] Allocated by task 213: [ 49.247841] kasan_save_stack+0x22/0x50 [ 49.248358] kasan_set_track+0x25/0x30 [ 49.248853] __kasan_slab_alloc+0x59/0x70 [ 49.249385] kmem_cache_alloc+0x16b/0x370 [ 49.249914] vm_area_dup+0x20/0x160 [ 49.250381] __split_vma+0x170/0x950 [ 49.250877] split_vma+0xc6/0x110 [ 49.251328] mprotect_fixup+0x8d2/0xb30 [ 49.251839] do_mprotect_pkey+0x87e/0xd40 [ 49.252365] __x64_sys_mprotect+0x78/0xc0 [ 49.252886] do_syscall_64+0x3f/0x90 [ 49.253360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.254005] [ 49.254228] Freed by task 213: [ 49.254631] kasan_save_stack+0x22/0x50 [ 49.255151] kasan_set_track+0x25/0x30 [ 49.255646] kasan_save_free_info+0x2b/0x50 [ 49.256186] __kasan_slab_free+0x10a/0x190 [ 49.256717] kmem_cache_free+0x10d/0x4d0 [ 49.257232] rcu_core+0x8c8/0x2860 [ 49.257681] __do_softirq+0x1b7/0x7d4 [ 49.258160] [ 49.258374] Last potentially related work creation: [ 49.258983] kasan_save_stack+0x22/0x50 [ 49.259488] __kasan_record_aux_stack+0x8e/0xa0 [ 49.260143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.260790] remove_vma+0x139/0x170 [ 49.261253] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.261810] do_vmi_munmap+0x1f1/0x2b0 [ 49.262306] __vm_munmap+0x138/0x3a0 [ 49.262786] __x64_sys_munmap+0x59/0x80 [ 49.263284] do_syscall_64+0x3f/0x90 [ 49.263756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.264410] [ 49.264624] Second to last potentially related work creation: [ 49.265314] kasan_save_stack+0x22/0x50 [ 49.265823] __kasan_record_aux_stack+0x8e/0xa0 [ 49.266410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.267062] remove_vma+0x139/0x170 [ 49.267531] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.268096] do_vmi_munmap+0x1f1/0x2b0 [ 49.268590] __vm_munmap+0x138/0x3a0 [ 49.269067] __x64_sys_munmap+0x59/0x80 [ 49.269573] do_syscall_64+0x3f/0x90 [ 49.270051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.270700] [ 49.270936] The buggy address belongs to the object at ffff88800e0eecb0 [ 49.270936] which belongs to the cache vm_area_struct of size 168 [ 49.272450] The buggy address is located 88 bytes inside of [ 49.272450] freed 168-byte region [ffff88800e0eecb0, ffff88800e0eed58) [ 49.273883] [ 49.274103] The buggy address belongs to the physical page: [ 49.274785] page:000000006a468505 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0ee [ 49.275891] memcg:ffff88800ede2c01 [ 49.276321] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 49.277018] page_type: 0xffffffff() [ 49.277484] raw: 0100000000000200 ffff88800879fc80 ffffea0000513cc0 dead000000000003 [ 49.278414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ede2c01 [ 49.279342] page dumped because: kasan: bad access detected [ 49.280009] [ 49.280227] Memory state around the buggy address: [ 49.280818] ffff88800e0eec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 49.281680] ffff88800e0eec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 49.282540] >ffff88800e0eed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 49.283408] ^ [ 49.283848] ffff88800e0eed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.284721] ffff88800e0eee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 49.285575] ================================================================== [ 49.286499] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 51.115914] BUG: Bad rss-counter state mm:000000008ba0adff type:MM_FILEPAGES val:33 [ 51.117207] BUG: Bad rss-counter state mm:000000008ba0adff type:MM_ANONPAGES val:22 [ 51.580587] BUG: Bad rss-counter state mm:000000004ec3dfe4 type:MM_FILEPAGES val:33 [ 51.581491] BUG: Bad rss-counter state mm:000000004ec3dfe4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19902' (ECDSA) to the list of known hosts. 2023/06/19 18:26:44 fuzzer started 2023/06/19 18:26:44 dialing manager at localhost:44161 2023/06/19 18:26:45 checking machine... 2023/06/19 18:26:45 checking revisions... [ 52.231913] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:26:45 testing simple program... [ 52.255207] cgroup: Unknown subsys name 'net' [ 52.289695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:26:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f1afc0066b0 RCX=00000000000000b1 RDX=00007f1b02c8a73c RSI=0000000000000000 RDI=000055c84a586570 RBP=00007f1afc0066b0 RSP=00007f1b02c8a730 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000286 R12=00007f1b02c8a8d0 R13=00007f1afc0066b0 R14=000055c849049ec0 R15=0000000000000000 RIP=000055c848fdaac5 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1b02c8b700 00000000 00000000 GS =0000 0000000000000000 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=00007f5ef44fe0b0 CR3=000000000c78e000 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=2034343a36323a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a36323a3831203931 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=ffff888008c58400 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=00007ffde169f508 CR3=000000000c78e000 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=36323a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343735 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000