[ 26.685050] BUG: Bad rss-counter state mm:00000000542f39ec type:MM_FILEPAGES val:33 [ 26.686303] BUG: Bad rss-counter state mm:00000000542f39ec type:MM_ANONPAGES val:22 [ 26.856802] ================================================================== [ 26.857757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.858762] Read of size 8 at addr ffff8880101404e0 by task sshd/220 [ 26.859677] [ 26.859907] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.860823] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.861888] Call Trace: [ 26.862235] [ 26.862541] dump_stack_lvl+0x91/0xf0 [ 26.863075] print_report+0xcc/0x620 [ 26.863594] ? __virt_addr_valid+0x102/0x340 [ 26.864187] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.864851] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.865512] kasan_report+0xbe/0xf0 [ 26.866093] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.866577] vma_interval_tree_remove+0xc75/0xec0 [ 26.867041] vma_prepare+0xc54/0x11a0 [ 26.867408] __split_vma+0x5af/0x950 [ 26.867768] ? __pfx___split_vma+0x10/0x10 [ 26.868169] ? find_held_lock+0x2c/0x110 [ 26.868569] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.869001] ? lock_is_held_type+0x9f/0x120 [ 26.869417] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.869881] ? mtree_range_walk+0x632/0x900 [ 26.870330] ? mas_walk+0x5c7/0x7c0 [ 26.870692] do_vmi_munmap+0x1f1/0x2b0 [ 26.871067] mmap_region+0x1f9/0x2660 [ 26.871435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.871825] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.872372] ? __pfx_lock_acquire+0x10/0x10 [ 26.872777] ? __pfx_mmap_region+0x10/0x10 [ 26.873182] ? security_mmap_addr+0x7d/0xa0 [ 26.873590] ? get_unmapped_area+0x1f5/0x3f0 [ 26.874008] do_mmap+0x854/0xf00 [ 26.874342] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.874721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.875146] ksys_mmap_pgoff+0x3af/0x500 [ 26.875532] do_syscall_64+0x3f/0x90 [ 26.875897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.876396] RIP: 0033:0x7f53089d5d82 [ 26.876744] 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 [ 26.878375] RSP: 002b:00007ffdfd147bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.879070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53089d5d82 [ 26.879726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5307e0f000 [ 26.880376] RBP: 00007f5307e0f000 R08: 0000000000000009 R09: 0000000000001000 [ 26.881025] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb849ffd90 [ 26.881668] R13: 00007ffdfd147bf0 R14: 00007ffdfd147c20 R15: 00007ffdfd147f80 [ 26.882330] [ 26.882556] [ 26.882721] Allocated by task 213: [ 26.883051] kasan_save_stack+0x22/0x50 [ 26.883363] kasan_set_track+0x25/0x30 [ 26.883662] __kasan_slab_alloc+0x59/0x70 [ 26.883974] kmem_cache_alloc+0x16b/0x370 [ 26.884281] vm_area_dup+0x20/0x160 [ 26.884550] __split_vma+0x170/0x950 [ 26.884831] split_vma+0xc6/0x110 [ 26.885090] mprotect_fixup+0x8d2/0xb30 [ 26.885387] do_mprotect_pkey+0x87e/0xd40 [ 26.885697] __x64_sys_mprotect+0x78/0xc0 [ 26.886004] do_syscall_64+0x3f/0x90 [ 26.886287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.886670] [ 26.886796] Freed by task 213: [ 26.887026] kasan_save_stack+0x22/0x50 [ 26.887323] kasan_set_track+0x25/0x30 [ 26.887613] kasan_save_free_info+0x2b/0x50 [ 26.887930] __kasan_slab_free+0x10a/0x190 [ 26.888248] kmem_cache_free+0x10d/0x4d0 [ 26.888552] rcu_core+0x8c8/0x2860 [ 26.888820] __do_softirq+0x1b7/0x7d4 [ 26.889105] [ 26.889232] Last potentially related work creation: [ 26.889581] kasan_save_stack+0x22/0x50 [ 26.889878] __kasan_record_aux_stack+0x8e/0xa0 [ 26.890226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.890603] remove_vma+0x139/0x170 [ 26.890872] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.891194] do_vmi_munmap+0x1f1/0x2b0 [ 26.891473] __vm_munmap+0x138/0x3a0 [ 26.891749] __x64_sys_munmap+0x59/0x80 [ 26.892043] do_syscall_64+0x3f/0x90 [ 26.892324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.892693] [ 26.892818] Second to last potentially related work creation: [ 26.893210] kasan_save_stack+0x22/0x50 [ 26.893497] __kasan_record_aux_stack+0x8e/0xa0 [ 26.893827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.894210] remove_vma+0x139/0x170 [ 26.894475] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.894800] do_vmi_munmap+0x1f1/0x2b0 [ 26.895085] mmap_region+0x1f9/0x2660 [ 26.895366] do_mmap+0x854/0xf00 [ 26.895618] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.895906] ksys_mmap_pgoff+0x3af/0x500 [ 26.896197] do_syscall_64+0x3f/0x90 [ 26.896481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.896853] [ 26.896975] The buggy address belongs to the object at ffff888010140488 [ 26.896975] which belongs to the cache vm_area_struct of size 168 [ 26.897829] The buggy address is located 88 bytes inside of [ 26.897829] freed 168-byte region [ffff888010140488, ffff888010140530) [ 26.898658] [ 26.898785] The buggy address belongs to the physical page: [ 26.899171] page:000000007845ec7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10140 [ 26.899794] memcg:ffff88800ca94801 [ 26.900040] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.900414] page_type: 0xffffffff() [ 26.900680] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 26.901217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca94801 [ 26.901746] page dumped because: kasan: bad access detected [ 26.902142] [ 26.902269] Memory state around the buggy address: [ 26.902602] ffff888010140380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.903108] ffff888010140400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 26.903603] >ffff888010140480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.904111] ^ [ 26.904550] ffff888010140500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 26.905054] ffff888010140580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.905538] ================================================================== [ 26.906105] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.965711] BUG: Bad rss-counter state mm:000000004edec07d type:MM_FILEPAGES val:33 [ 28.966912] BUG: Bad rss-counter state mm:000000004edec07d type:MM_ANONPAGES val:22 [ 29.344857] BUG: Bad rss-counter state mm:00000000efcac7fc type:MM_FILEPAGES val:33 [ 29.345855] BUG: Bad rss-counter state mm:00000000efcac7fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60024' (ECDSA) to the list of known hosts. 2023/06/20 03:02:21 fuzzer started 2023/06/20 03:02:21 dialing manager at localhost:44161 2023/06/20 03:02:21 checking machine... 2023/06/20 03:02:21 checking revisions... [ 30.076777] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:02:21 testing simple program... [ 30.124070] cgroup: Unknown subsys name 'net' [ 30.222312] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:02:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8153457f RDX=1ffff11001fb4b75 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450c12e RSP=ffff888019eeff00 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=0000560d83517000 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fac80f8b900 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=0000560d83517000 CR3=0000000009704000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffdefb56e88 CR3=0000000016ea8000 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=2031323a32303a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a32303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000