[ 36.102862] BUG: Bad rss-counter state mm:00000000b8fd7c4b type:MM_FILEPAGES val:33 [ 36.103965] BUG: Bad rss-counter state mm:00000000b8fd7c4b type:MM_ANONPAGES val:22 [ 36.213513] ================================================================== [ 36.214333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.215196] Read of size 8 at addr ffff88800e9bca50 by task sshd/220 [ 36.215912] [ 36.216105] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.216903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.217910] Call Trace: [ 36.218196] [ 36.218453] dump_stack_lvl+0x91/0xf0 [ 36.218894] print_report+0xcc/0x620 [ 36.219328] ? __virt_addr_valid+0x102/0x340 [ 36.219853] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.220403] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.220853] kasan_report+0xbe/0xf0 [ 36.221196] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.221644] vma_interval_tree_remove+0xc75/0xec0 [ 36.222080] vma_prepare+0xc54/0x11a0 [ 36.222427] __split_vma+0x5af/0x950 [ 36.222763] ? __pfx___split_vma+0x10/0x10 [ 36.223088] ? find_held_lock+0x2c/0x110 [ 36.223381] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.223704] ? lock_is_held_type+0x9f/0x120 [ 36.224004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.224343] ? mtree_range_walk+0x632/0x900 [ 36.224652] ? mas_walk+0x5c7/0x7c0 [ 36.224915] do_vmi_munmap+0x1f1/0x2b0 [ 36.225189] mmap_region+0x1f9/0x2660 [ 36.225458] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.225744] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.226140] ? __pfx_lock_acquire+0x10/0x10 [ 36.226438] ? __pfx_mmap_region+0x10/0x10 [ 36.226730] ? security_mmap_addr+0x7d/0xa0 [ 36.227022] ? get_unmapped_area+0x1f5/0x3f0 [ 36.227323] do_mmap+0x854/0xf00 [ 36.227564] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.227854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.228163] ksys_mmap_pgoff+0x3af/0x500 [ 36.228445] do_syscall_64+0x3f/0x90 [ 36.228714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.229073] RIP: 0033:0x7f866865ad82 [ 36.229326] 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 [ 36.230496] RSP: 002b:00007ffeeb4354d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.230993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f866865ad82 [ 36.231456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8667a94000 [ 36.231930] RBP: 00007f8667a94000 R08: 0000000000000009 R09: 0000000000001000 [ 36.232395] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562070cdaec0 [ 36.232864] R13: 00007ffeeb4354f0 R14: 00007ffeeb435520 R15: 00007ffeeb435880 [ 36.233332] [ 36.233499] [ 36.233618] Allocated by task 213: [ 36.233854] kasan_save_stack+0x22/0x50 [ 36.234135] kasan_set_track+0x25/0x30 [ 36.234406] __kasan_slab_alloc+0x59/0x70 [ 36.234695] kmem_cache_alloc+0x16b/0x370 [ 36.234982] vm_area_dup+0x20/0x160 [ 36.235234] __split_vma+0x170/0x950 [ 36.235490] split_vma+0xc6/0x110 [ 36.235738] mprotect_fixup+0x8d2/0xb30 [ 36.236016] do_mprotect_pkey+0x87e/0xd40 [ 36.236304] __x64_sys_mprotect+0x78/0xc0 [ 36.236597] do_syscall_64+0x3f/0x90 [ 36.236858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.237215] [ 36.237335] Freed by task 213: [ 36.237557] kasan_save_stack+0x22/0x50 [ 36.237836] kasan_set_track+0x25/0x30 [ 36.238108] kasan_save_free_info+0x2b/0x50 [ 36.238401] __kasan_slab_free+0x10a/0x190 [ 36.238699] kmem_cache_free+0x10d/0x4d0 [ 36.238981] rcu_core+0x8c8/0x2860 [ 36.239230] __do_softirq+0x1b7/0x7d4 [ 36.239500] [ 36.239620] Last potentially related work creation: [ 36.239953] kasan_save_stack+0x22/0x50 [ 36.240233] __kasan_record_aux_stack+0x8e/0xa0 [ 36.240552] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.240910] remove_vma+0x139/0x170 [ 36.241161] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.241469] do_vmi_munmap+0x1f1/0x2b0 [ 36.241740] __vm_munmap+0x138/0x3a0 [ 36.241999] __x64_sys_munmap+0x59/0x80 [ 36.242274] do_syscall_64+0x3f/0x90 [ 36.242536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.242896] [ 36.243017] The buggy address belongs to the object at ffff88800e9bc9f8 [ 36.243017] which belongs to the cache vm_area_struct of size 168 [ 36.243831] The buggy address is located 88 bytes inside of [ 36.243831] freed 168-byte region [ffff88800e9bc9f8, ffff88800e9bcaa0) [ 36.244606] [ 36.244726] The buggy address belongs to the physical page: [ 36.245094] page:0000000054666492 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9bc [ 36.245694] memcg:ffff88800c909301 [ 36.245933] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.246319] page_type: 0xffffffff() [ 36.246573] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.247081] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c909301 [ 36.247581] page dumped because: kasan: bad access detected [ 36.247955] [ 36.248078] Memory state around the buggy address: [ 36.248399] ffff88800e9bc900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.248873] ffff88800e9bc980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.249345] >ffff88800e9bca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.249813] ^ [ 36.250201] ffff88800e9bca80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.250679] ffff88800e9bcb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.251148] ================================================================== [ 36.251707] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.596500] BUG: Bad rss-counter state mm:0000000011a5fce4 type:MM_FILEPAGES val:33 [ 37.597494] BUG: Bad rss-counter state mm:0000000011a5fce4 type:MM_ANONPAGES val:22 [ 38.060410] BUG: Bad rss-counter state mm:00000000294c919c type:MM_FILEPAGES val:33 [ 38.061294] BUG: Bad rss-counter state mm:00000000294c919c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4531' (ECDSA) to the list of known hosts. 2023/06/19 11:24:21 fuzzer started 2023/06/19 11:24:21 dialing manager at localhost:44161 2023/06/19 11:24:21 checking machine... 2023/06/19 11:24:21 checking revisions... [ 38.714760] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:24:21 testing simple program... [ 38.755918] cgroup: Unknown subsys name 'net' [ 38.814056] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:24:08 Registers: info registers vcpu 0 RAX=1ffffffff0bf46f2 RBX=ffffffff85fa3790 RCX=ffffffff8363c1b0 RDX=0000000000000000 RSI=ffffffff863b192a RDI=ffffffff85fa3768 RBP=ffffffff85fa378c RSP=ffff88800fc07810 R8 =ffffffff863b192a R9 =ffff88800fc07908 R10=0000000000038001 R11=000000000008a8e5 R12=ffffffff85fa3794 R13=ffffffff85fa3768 R14=ffffffff85fa3788 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f8ac6efa900 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=00007f8ac74b1618 CR3=000000000e980000 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=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=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=00007ffe6fa3b998 CR3=000000000ead2000 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=2030323a34323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a34323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000