[ 34.027414] BUG: Bad rss-counter state mm:000000004f82e5f4 type:MM_FILEPAGES val:33 [ 34.028595] BUG: Bad rss-counter state mm:000000004f82e5f4 type:MM_ANONPAGES val:22 [ 34.072082] ================================================================== [ 34.073328] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.074674] Read of size 8 at addr ffff88800c6126b0 by task sshd/219 [ 34.075906] [ 34.076222] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.077750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.079332] Call Trace: [ 34.079845] [ 34.080390] dump_stack_lvl+0x91/0xf0 [ 34.081176] print_report+0xcc/0x620 [ 34.081747] ? __virt_addr_valid+0x102/0x340 [ 34.082443] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.083223] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.084124] kasan_report+0xbe/0xf0 [ 34.084724] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.085494] vma_interval_tree_remove+0xc75/0xec0 [ 34.086228] vma_prepare+0xc54/0x11a0 [ 34.086794] __split_vma+0x5af/0x950 [ 34.087387] ? __pfx___split_vma+0x10/0x10 [ 34.088028] ? find_held_lock+0x2c/0x110 [ 34.088648] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.089328] ? lock_is_held_type+0x9f/0x120 [ 34.089982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.090716] ? mtree_range_walk+0x632/0x900 [ 34.091393] ? mas_walk+0x5c7/0x7c0 [ 34.091952] do_vmi_munmap+0x1f1/0x2b0 [ 34.092551] mmap_region+0x1f9/0x2660 [ 34.093137] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.093767] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.094620] ? __pfx_lock_acquire+0x10/0x10 [ 34.095281] ? __pfx_mmap_region+0x10/0x10 [ 34.095913] ? security_mmap_addr+0x7d/0xa0 [ 34.096559] ? get_unmapped_area+0x1f5/0x3f0 [ 34.097414] do_mmap+0x854/0xf00 [ 34.097938] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.098544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.099222] ksys_mmap_pgoff+0x3af/0x500 [ 34.099824] do_syscall_64+0x3f/0x90 [ 34.100415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.101200] RIP: 0033:0x7ff6dfb99d82 [ 34.101769] 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 [ 34.104309] RSP: 002b:00007fff94f48c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.105417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6dfb99d82 [ 34.106435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6defd3000 [ 34.107464] RBP: 00007ff6defd3000 R08: 0000000000000009 R09: 0000000000001000 [ 34.108483] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559434144ec0 [ 34.109522] R13: 00007fff94f48c60 R14: 00007fff94f48c90 R15: 00007fff94f48ff0 [ 34.110576] [ 34.110978] [ 34.111269] Allocated by task 211: [ 34.111888] kasan_save_stack+0x22/0x50 [ 34.112448] kasan_set_track+0x25/0x30 [ 34.113008] __kasan_slab_alloc+0x59/0x70 [ 34.113617] kmem_cache_alloc+0x16b/0x370 [ 34.114193] vm_area_dup+0x20/0x160 [ 34.114700] __split_vma+0x170/0x950 [ 34.115225] split_vma+0xc6/0x110 [ 34.115714] mprotect_fixup+0x8d2/0xb30 [ 34.116268] do_mprotect_pkey+0x87e/0xd40 [ 34.116852] __x64_sys_mprotect+0x78/0xc0 [ 34.117465] do_syscall_64+0x3f/0x90 [ 34.118011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.118744] [ 34.118994] Freed by task 211: [ 34.119439] kasan_save_stack+0x22/0x50 [ 34.120023] kasan_set_track+0x25/0x30 [ 34.120587] kasan_save_free_info+0x2b/0x50 [ 34.121190] __kasan_slab_free+0x10a/0x190 [ 34.121812] kmem_cache_free+0x10d/0x4d0 [ 34.122392] rcu_core+0x8c8/0x2860 [ 34.122898] __do_softirq+0x1b7/0x7d4 [ 34.123444] [ 34.123693] Last potentially related work creation: [ 34.124356] kasan_save_stack+0x22/0x50 [ 34.124924] __kasan_record_aux_stack+0x8e/0xa0 [ 34.125611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.126338] remove_vma+0x139/0x170 [ 34.126850] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.127484] do_vmi_munmap+0x1f1/0x2b0 [ 34.128040] __vm_munmap+0x138/0x3a0 [ 34.128573] __x64_sys_munmap+0x59/0x80 [ 34.129142] do_syscall_64+0x3f/0x90 [ 34.129702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.130431] [ 34.130685] Second to last potentially related work creation: [ 34.131466] kasan_save_stack+0x22/0x50 [ 34.132042] __kasan_record_aux_stack+0x8e/0xa0 [ 34.132696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.133429] remove_vma+0x139/0x170 [ 34.133941] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.134568] do_vmi_munmap+0x1f1/0x2b0 [ 34.135174] mmap_region+0x1f9/0x2660 [ 34.135769] do_mmap+0x854/0xf00 [ 34.136306] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.136920] ksys_mmap_pgoff+0x3af/0x500 [ 34.137568] do_syscall_64+0x3f/0x90 [ 34.138165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.139044] [ 34.139312] The buggy address belongs to the object at ffff88800c612658 [ 34.139312] which belongs to the cache vm_area_struct of size 168 [ 34.141138] The buggy address is located 88 bytes inside of [ 34.141138] freed 168-byte region [ffff88800c612658, ffff88800c612700) [ 34.142914] [ 34.143180] The buggy address belongs to the physical page: [ 34.144014] page:00000000763148dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc612 [ 34.145361] memcg:ffff88800ef06b01 [ 34.145904] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.146723] page_type: 0xffffffff() [ 34.147289] raw: 0100000000000200 ffff88800879fc80 ffffea000038fac0 dead000000000006 [ 34.148442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef06b01 [ 34.149595] page dumped because: kasan: bad access detected [ 34.150421] [ 34.150689] Memory state around the buggy address: [ 34.151419] ffff88800c612580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.152488] ffff88800c612600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.153580] >ffff88800c612680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.154639] ^ [ 34.155371] ffff88800c612700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.156436] ffff88800c612780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.157528] ================================================================== [ 34.158830] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.175713] BUG: Bad rss-counter state mm:00000000b4cc6013 type:MM_FILEPAGES val:33 [ 37.177094] BUG: Bad rss-counter state mm:00000000b4cc6013 type:MM_ANONPAGES val:22 [ 37.573900] BUG: Bad rss-counter state mm:00000000a95ac637 type:MM_FILEPAGES val:33 [ 37.574852] BUG: Bad rss-counter state mm:00000000a95ac637 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61384' (ECDSA) to the list of known hosts. 2023/06/19 20:05:54 fuzzer started 2023/06/19 20:05:55 dialing manager at localhost:44161 2023/06/19 20:05:55 checking machine... 2023/06/19 20:05:55 checking revisions... [ 38.282044] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:05:55 testing simple program... [ 38.322137] cgroup: Unknown subsys name 'net' [ 38.353310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b18 RCX=0000000000000001 RDX=1ffff1100d9c1364 RSI=ffffffff8460144a RDI=ffff88806ce09b20 RBP=0000000000000009 RSP=ffff88806ce09a30 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09b18 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ed92f00 RIP=ffffffff813ad485 RFL=00000287 [--S--PC] 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=00007ffe5334de88 CR3=0000000019b98000 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=2034353a35303a3032203931206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a323637373520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a35303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800c457180 RCX=0000000000000000 RDX=ffff88801030d1c0 RSI=ffffffff818628c9 RDI=ffff88800c457180 RBP=0000000000001000 RSP=ffff88800fcffd70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=000055ba80c5de90 R14=ffff88800fcffec8 R15=0000000000001000 RIP=ffffffff814c081b 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 00007f2009b38900 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=00007f200a0f00b0 CR3=000000000ee9e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000