[ 32.109802] BUG: Bad rss-counter state mm:00000000f30e9bc8 type:MM_FILEPAGES val:33 [ 32.110321] BUG: Bad rss-counter state mm:00000000f30e9bc8 type:MM_ANONPAGES val:22 [ OK ] Finished Update UTMP about System Runlevel Changes. [ 32.555088] ================================================================== [ 32.555104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.555157] Read of size 8 at addr ffff888019698880 by task sshd/219 [ 32.555180] [ 32.555186] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.555215] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.555231] Call Trace: [ 32.555238] [ 32.555248] dump_stack_lvl+0x91/0xf0 [ 32.555289] print_report+0xcc/0x620 [ 32.555335] ? __virt_addr_valid+0x102/0x340 [ 32.555368] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.555404] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.555440] kasan_report+0xbe/0xf0 [ 32.555487] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.555527] vma_interval_tree_remove+0xc75/0xec0 [ 32.555567] vma_prepare+0xc54/0x11a0 [ 32.555600] __split_vma+0x5af/0x950 [ 32.555635] ? __pfx___split_vma+0x10/0x10 [ 32.555673] ? find_held_lock+0x2c/0x110 [ 32.555720] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.555759] ? lock_is_held_type+0x9f/0x120 [ 32.555796] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.555831] ? mtree_range_walk+0x632/0x900 [ 32.555882] ? mas_walk+0x5c7/0x7c0 [ 32.555928] do_vmi_munmap+0x1f1/0x2b0 [ 32.555965] mmap_region+0x1f9/0x2660 [ 32.556027] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.556066] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.556102] ? __pfx_lock_acquire+0x10/0x10 [ 32.556134] ? __pfx_mmap_region+0x10/0x10 [ 32.556173] ? security_mmap_addr+0x7d/0xa0 [ 32.556203] ? get_unmapped_area+0x1f5/0x3f0 [ 32.556236] do_mmap+0x854/0xf00 [ 32.556274] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.556314] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.556359] ksys_mmap_pgoff+0x3af/0x500 [ 32.556393] do_syscall_64+0x3f/0x90 [ 32.556434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.556481] RIP: 0033:0x7fbe0c6a3d82 [ 32.556502] 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 [ 32.556529] RSP: 002b:00007fff5c707528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.556557] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe0c6a3d82 [ 32.556577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe0badd000 [ 32.556596] RBP: 00007fbe0badd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.556614] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563570324ec0 [ 32.556633] R13: 00007fff5c707540 R14: 00007fff5c707570 R15: 00007fff5c7078d0 [ 32.556661] [ 32.556669] [ 32.556673] Allocated by task 208: [ 32.556684] kasan_save_stack+0x22/0x50 [ 32.556725] kasan_set_track+0x25/0x30 [ 32.556764] __kasan_slab_alloc+0x59/0x70 [ 32.556806] kmem_cache_alloc+0x16b/0x370 [ 32.556840] vm_area_dup+0x20/0x160 [ 32.556866] __split_vma+0x170/0x950 [ 32.556896] split_vma+0xc6/0x110 [ 32.556926] mprotect_fixup+0x8d2/0xb30 [ 32.556963] do_mprotect_pkey+0x87e/0xd40 [ 32.557002] __x64_sys_mprotect+0x78/0xc0 [ 32.557041] do_syscall_64+0x3f/0x90 [ 32.557077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.557120] [ 32.557124] Freed by task 208: [ 32.557135] kasan_save_stack+0x22/0x50 [ 32.557175] kasan_set_track+0x25/0x30 [ 32.557214] kasan_save_free_info+0x2b/0x50 [ 32.557246] __kasan_slab_free+0x10a/0x190 [ 32.557287] kmem_cache_free+0x10d/0x4d0 [ 32.557322] rcu_core+0x8c8/0x2860 [ 32.557348] __do_softirq+0x1b7/0x7d4 [ 32.557378] [ 32.557382] Last potentially related work creation: [ 32.557388] kasan_save_stack+0x22/0x50 [ 32.557428] __kasan_record_aux_stack+0x8e/0xa0 [ 32.557458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.557503] remove_vma+0x139/0x170 [ 32.557526] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.557558] do_vmi_munmap+0x1f1/0x2b0 [ 32.557590] __vm_munmap+0x138/0x3a0 [ 32.557620] __x64_sys_munmap+0x59/0x80 [ 32.557653] do_syscall_64+0x3f/0x90 [ 32.557689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.557733] [ 32.557736] The buggy address belongs to the object at ffff888019698828 [ 32.557736] which belongs to the cache vm_area_struct of size 168 [ 32.557758] The buggy address is located 88 bytes inside of [ 32.557758] freed 168-byte region [ffff888019698828, ffff8880196988d0) [ 32.557786] [ 32.557790] The buggy address belongs to the physical page: [ 32.557798] page:000000001c7ff692 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19698 [ 32.557833] memcg:ffff88801966eb01 [ 32.557842] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.557864] page_type: 0xffffffff() [ 32.611079] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.611109] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801966eb01 [ 32.611124] page dumped because: kasan: bad access detected [ 32.611134] [ 32.611138] Memory state around the buggy address: [ 32.611149] ffff888019698780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.611168] ffff888019698800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.611186] >ffff888019698880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.611200] ^ [ 32.611212] ffff888019698900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.611231] ffff888019698980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.611245] ================================================================== [ 32.611422] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.327778] BUG: Bad rss-counter state mm:0000000044ed66ef type:MM_FILEPAGES val:33 [ 35.328965] BUG: Bad rss-counter state mm:0000000044ed66ef type:MM_ANONPAGES val:22 [ 35.788512] BUG: Bad rss-counter state mm:000000002af618c4 type:MM_FILEPAGES val:33 [ 35.789694] BUG: Bad rss-counter state mm:000000002af618c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11075' (ECDSA) to the list of known hosts. 2023/06/20 02:32:50 fuzzer started 2023/06/20 02:32:51 dialing manager at localhost:44161 2023/06/20 02:32:51 checking machine... 2023/06/20 02:32:51 checking revisions... [ 36.451340] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:32:51 testing simple program... [ 36.505889] cgroup: Unknown subsys name 'net' [ 36.545676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:32:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e388be0 RCX=0000000000000000 RDX=1ffff11001c7117c RSI=0000000000000000 RDI=ffffffff87b86c40 RBP=ffffffff848ff060 RSP=ffff88801585f608 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff87b86c40 R13=0000000000000002 R14=ffff88800e388c28 R15=ffff88800e388be0 RIP=ffffffff812dfbbf 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 00007fe3b06d3900 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=00007ffe20bef000 CR3=000000000e1ce000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=ffff88806cf09df0 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff88806cf09b30 RSP=ffff88806cf09a78 R8 =ffffffff8613751e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b60 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81130933 RFL=00000296 [--S-AP-] 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=00007f74d37c4000 CR3=0000000015b2a000 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=2030353a32333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a32333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000