[ 29.890848] BUG: Bad rss-counter state mm:000000000a6d49ae type:MM_FILEPAGES val:33 [ 29.891830] BUG: Bad rss-counter state mm:000000000a6d49ae type:MM_ANONPAGES val:22 [ 30.022646] ================================================================== [ 30.044742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.045356] Read of size 8 at addr ffff88800e28b6b0 by task sshd/221 [ 30.048548] [ 30.048695] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.049243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.049863] Call Trace: [ 30.050071] [ 30.050259] dump_stack_lvl+0x91/0xf0 [ 30.050589] print_report+0xcc/0x620 [ 30.050910] ? __virt_addr_valid+0x102/0x340 [ 30.051268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.051676] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.052080] kasan_report+0xbe/0xf0 [ 30.052511] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.056630] vma_interval_tree_remove+0xc75/0xec0 [ 30.057029] vma_prepare+0xc54/0x11a0 [ 30.057341] __split_vma+0x5af/0x950 [ 30.057652] ? __pfx___split_vma+0x10/0x10 [ 30.057997] ? find_held_lock+0x2c/0x110 [ 30.058338] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.058712] ? lock_is_held_type+0x9f/0x120 [ 30.059066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.060593] ? mtree_range_walk+0x632/0x900 [ 30.060960] ? mas_walk+0x5c7/0x7c0 [ 30.061270] do_vmi_munmap+0x1f1/0x2b0 [ 30.061588] mmap_region+0x1f9/0x2660 [ 30.061904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.068425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.080728] ? __pfx_lock_acquire+0x10/0x10 [ 30.081085] ? __pfx_mmap_region+0x10/0x10 [ 30.081432] ? security_mmap_addr+0x7d/0xa0 [ 30.081780] ? get_unmapped_area+0x1f5/0x3f0 [ 30.082140] do_mmap+0x854/0xf00 [ 30.082429] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.082762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.083128] ksys_mmap_pgoff+0x3af/0x500 [ 30.083459] do_syscall_64+0x3f/0x90 [ 30.083777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.084199] RIP: 0033:0x7f4a4e7f8d82 [ 30.084524] 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 [ 30.085890] RSP: 002b:00007ffdb2f891b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.086477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a4e7f8d82 [ 30.087022] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a4dc32000 [ 30.087566] RBP: 00007f4a4dc32000 R08: 0000000000000009 R09: 0000000000001000 [ 30.088107] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf25164f70 [ 30.088689] R13: 00007ffdb2f891d0 R14: 00007ffdb2f89200 R15: 00007ffdb2f89560 [ 30.089236] [ 30.089425] [ 30.089566] Allocated by task 214: [ 30.089848] kasan_save_stack+0x22/0x50 [ 30.090177] kasan_set_track+0x25/0x30 [ 30.090494] __kasan_slab_alloc+0x59/0x70 [ 30.090839] kmem_cache_alloc+0x16b/0x370 [ 30.091170] vm_area_dup+0x20/0x160 [ 30.091464] __split_vma+0x170/0x950 [ 30.091776] split_vma+0xc6/0x110 [ 30.092065] mprotect_fixup+0x8d2/0xb30 [ 30.092417] do_mprotect_pkey+0x87e/0xd40 [ 30.092768] __x64_sys_mprotect+0x78/0xc0 [ 30.093105] do_syscall_64+0x3f/0x90 [ 30.093414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.093833] [ 30.093973] Freed by task 214: [ 30.094224] kasan_save_stack+0x22/0x50 [ 30.094550] kasan_set_track+0x25/0x30 [ 30.094883] kasan_save_free_info+0x2b/0x50 [ 30.095231] __kasan_slab_free+0x10a/0x190 [ 30.095578] kmem_cache_free+0x10d/0x4d0 [ 30.095910] rcu_core+0x8c8/0x2860 [ 30.096201] __do_softirq+0x1b7/0x7d4 [ 30.096548] [ 30.096691] Last potentially related work creation: [ 30.097069] kasan_save_stack+0x22/0x50 [ 30.097399] __kasan_record_aux_stack+0x8e/0xa0 [ 30.097774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.098182] remove_vma+0x139/0x170 [ 30.098469] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.098833] do_vmi_munmap+0x1f1/0x2b0 [ 30.099146] __vm_munmap+0x138/0x3a0 [ 30.099449] __x64_sys_munmap+0x59/0x80 [ 30.099775] do_syscall_64+0x3f/0x90 [ 30.100085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.100539] [ 30.100681] Second to last potentially related work creation: [ 30.101115] kasan_save_stack+0x22/0x50 [ 30.101463] __kasan_record_aux_stack+0x8e/0xa0 [ 30.101844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.102253] remove_vma+0x139/0x170 [ 30.102543] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.102908] do_vmi_munmap+0x1f1/0x2b0 [ 30.103226] mmap_region+0x1f9/0x2660 [ 30.103532] do_mmap+0x854/0xf00 [ 30.103810] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.104122] ksys_mmap_pgoff+0x7d/0x500 [ 30.104467] do_syscall_64+0x3f/0x90 [ 30.104784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.105196] [ 30.105334] The buggy address belongs to the object at ffff88800e28b658 [ 30.105334] which belongs to the cache vm_area_struct of size 168 [ 30.106267] The buggy address is located 88 bytes inside of [ 30.106267] freed 168-byte region [ffff88800e28b658, ffff88800e28b700) [ 30.107154] [ 30.107296] The buggy address belongs to the physical page: [ 30.107729] page:00000000c3331da7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe28b [ 30.108436] memcg:ffff88800e287901 [ 30.108721] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.109176] page_type: 0xffffffff() [ 30.109469] raw: 0100000000000200 ffff8880087a0c80 ffffea0000377d40 dead000000000003 [ 30.110055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e287901 [ 30.110635] page dumped because: kasan: bad access detected [ 30.111053] [ 30.111191] Memory state around the buggy address: [ 30.111558] ffff88800e28b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.112120] ffff88800e28b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.112712] >ffff88800e28b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.113259] ^ [ 30.113639] ffff88800e28b700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.114191] ffff88800e28b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.114745] ================================================================== [ 30.115534] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.128676] BUG: Bad rss-counter state mm:00000000d0ed2812 type:MM_FILEPAGES val:33 [ 34.130589] BUG: Bad rss-counter state mm:00000000d0ed2812 type:MM_ANONPAGES val:22 [ 35.992549] BUG: Bad rss-counter state mm:00000000a1d0ea4e type:MM_FILEPAGES val:33 [ 35.993271] BUG: Bad rss-counter state mm:00000000a1d0ea4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50142' (ECDSA) to the list of known hosts. 2023/06/21 09:58:34 fuzzer started 2023/06/21 09:58:34 dialing manager at localhost:36067 2023/06/21 09:58:34 checking machine... 2023/06/21 09:58:34 checking revisions... [ 36.822416] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:58:34 testing simple program... [ 36.889257] cgroup: Unknown subsys name 'net' [ 36.956622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:58:34 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800fc27d90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff8171b018 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff8180f186 RFL=00000282 [--S----] 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 00007fcbfa1d2900 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=00007fcbfa616e40 CR3=000000000b952000 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=25252525252525252525252525252525 XMM01=00000000ff0000ff000000ffff0000ff XMM02=00000000ff00000000000000ff000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=7378616d000a6f2530207325000a6425 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f354938c328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000