[ 31.670270] BUG: Bad rss-counter state mm:00000000628d0db9 type:MM_FILEPAGES val:33 [ 31.671479] BUG: Bad rss-counter state mm:00000000628d0db9 type:MM_ANONPAGES val:22 [ 31.711393] ================================================================== [ 31.712336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.713300] Read of size 8 at addr ffff888015eac228 by task sshd/220 [ 31.714045] [ 31.714273] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.715201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.716091] Call Trace: [ 31.716356] [ 31.716609] dump_stack_lvl+0x91/0xf0 [ 31.717156] print_report+0xcc/0x620 [ 31.717558] ? __virt_addr_valid+0x102/0x340 [ 31.718017] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.718533] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.719038] kasan_report+0xbe/0xf0 [ 31.719428] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.719957] vma_interval_tree_remove+0xc75/0xec0 [ 31.720452] vma_prepare+0xc54/0x11a0 [ 31.720852] __split_vma+0x5af/0x950 [ 31.721243] ? __pfx___split_vma+0x10/0x10 [ 31.721685] ? find_held_lock+0x2c/0x110 [ 31.722108] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.722576] ? lock_is_held_type+0x9f/0x120 [ 31.723021] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.723525] ? mtree_range_walk+0x632/0x900 [ 31.724000] ? mas_walk+0x5c7/0x7c0 [ 31.724390] do_vmi_munmap+0x1f1/0x2b0 [ 31.724804] mmap_region+0x1f9/0x2660 [ 31.725202] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.725626] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.726230] ? __pfx_lock_acquire+0x10/0x10 [ 31.726680] ? __pfx_mmap_region+0x10/0x10 [ 31.727121] ? security_mmap_addr+0x7d/0xa0 [ 31.727573] ? get_unmapped_area+0x1f5/0x3f0 [ 31.728056] do_mmap+0x854/0xf00 [ 31.728425] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.728838] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.729309] ksys_mmap_pgoff+0x3af/0x500 [ 31.729744] do_syscall_64+0x3f/0x90 [ 31.730139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.730680] RIP: 0033:0x7f74f5481d82 [ 31.731065] 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 [ 31.732865] RSP: 002b:00007ffc0d861b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.733627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74f5481d82 [ 31.734350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74f48bb000 [ 31.735057] RBP: 00007f74f48bb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.735781] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617464ceec0 [ 31.736493] R13: 00007ffc0d861ba0 R14: 00007ffc0d861bd0 R15: 00007ffc0d861f30 [ 31.737210] [ 31.737453] [ 31.737633] Allocated by task 213: [ 31.737994] kasan_save_stack+0x22/0x50 [ 31.738407] kasan_set_track+0x25/0x30 [ 31.738826] __kasan_slab_alloc+0x59/0x70 [ 31.739263] kmem_cache_alloc+0x16b/0x370 [ 31.739715] vm_area_dup+0x20/0x160 [ 31.740099] __split_vma+0x170/0x950 [ 31.740491] split_vma+0xc6/0x110 [ 31.740853] mprotect_fixup+0x8d2/0xb30 [ 31.741265] do_mprotect_pkey+0x87e/0xd40 [ 31.741698] __x64_sys_mprotect+0x78/0xc0 [ 31.742142] do_syscall_64+0x3f/0x90 [ 31.742547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.743081] [ 31.743266] Freed by task 213: [ 31.743611] kasan_save_stack+0x22/0x50 [ 31.744048] kasan_set_track+0x25/0x30 [ 31.744459] kasan_save_free_info+0x2b/0x50 [ 31.744897] __kasan_slab_free+0x10a/0x190 [ 31.745340] kmem_cache_free+0x10d/0x4d0 [ 31.745762] rcu_core+0x8c8/0x2860 [ 31.746129] __do_softirq+0x1b7/0x7d4 [ 31.746520] [ 31.746700] Last potentially related work creation: [ 31.747189] kasan_save_stack+0x22/0x50 [ 31.747614] __kasan_record_aux_stack+0x8e/0xa0 [ 31.748095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.748628] remove_vma+0x139/0x170 [ 31.749002] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.749464] do_vmi_munmap+0x1f1/0x2b0 [ 31.749869] __vm_munmap+0x138/0x3a0 [ 31.750257] __x64_sys_munmap+0x59/0x80 [ 31.750668] do_syscall_64+0x3f/0x90 [ 31.751061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.751593] [ 31.751779] The buggy address belongs to the object at ffff888015eac1d0 [ 31.751779] which belongs to the cache vm_area_struct of size 168 [ 31.753003] The buggy address is located 88 bytes inside of [ 31.753003] freed 168-byte region [ffff888015eac1d0, ffff888015eac278) [ 31.754188] [ 31.754370] The buggy address belongs to the physical page: [ 31.754925] page:000000006e6ff630 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15eac [ 31.755846] memcg:ffff88800e7d8901 [ 31.756264] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.756878] page_type: 0xffffffff() [ 31.757253] raw: 0100000000000200 ffff88800879fc80 ffffea0000615480 000000000000000b [ 31.758026] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7d8901 [ 31.758797] page dumped because: kasan: bad access detected [ 31.759352] [ 31.759533] Memory state around the buggy address: [ 31.760022] ffff888015eac100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.760745] ffff888015eac180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.761457] >ffff888015eac200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.762187] ^ [ 31.762652] ffff888015eac280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.763364] ffff888015eac300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.764084] ================================================================== [ 31.764865] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.251440] BUG: Bad rss-counter state mm:0000000029c94d0c type:MM_FILEPAGES val:33 [ 34.252360] BUG: Bad rss-counter state mm:0000000029c94d0c type:MM_ANONPAGES val:22 [ 34.838161] BUG: Bad rss-counter state mm:000000005b306fec type:MM_FILEPAGES val:33 [ 34.839162] BUG: Bad rss-counter state mm:000000005b306fec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11379' (ECDSA) to the list of known hosts. 2023/06/19 23:25:42 fuzzer started 2023/06/19 23:25:43 dialing manager at localhost:44161 2023/06/19 23:25:43 checking machine... 2023/06/19 23:25:43 checking revisions... [ 35.504662] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:25:43 testing simple program... [ 35.544979] cgroup: Unknown subsys name 'net' [ 35.576324] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:25:42 Registers: info registers vcpu 0 RAX=ffff88806ce02000 RBX=ffff88806ce09b30 RCX=0000000000000001 RDX=ffff88806ce0a000 RSI=ffff88806ce09a68 RDI=ffff88806ce09aa8 RBP=dffffc0000000000 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffffed100d9c1355 R13=ffffed100d9c1354 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff81132fc3 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 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=00007ffc56f7f638 CR3=0000000009734000 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=2032343a35323a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a35323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000244c3 RBX=0000000000000001 RCX=ffffffff818d9dc5 RDX=00000000000244d4 RSI=0000000000008d9d RDI=000000000006ce49 RBP=ffff888008e57988 RSP=ffff888008e578c0 R8 =ffffffff8614c05e R9 =ffff888008e57970 R10=0000000000038001 R11=00000000000244c3 R12=ffff888008e57990 R13=ffff888008e57978 R14=ffff888008e57971 R15=ffff888008e57930 RIP=ffffffff81130853 RFL=00000283 [--S---C] 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 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=00007f6b838230b0 CR3=0000000013412000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000