[ 27.941981] BUG: Bad rss-counter state mm:00000000d856e392 type:MM_FILEPAGES val:33 [ 27.942821] BUG: Bad rss-counter state mm:00000000d856e392 type:MM_ANONPAGES val:22 [ 28.071876] ================================================================== [ 28.074844] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.076667] Read of size 8 at addr ffff888019e9ed08 by task sshd/218 [ 28.077152] [ 28.077284] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.077783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.078535] Call Trace: [ 28.078752] [ 28.079081] dump_stack_lvl+0x91/0xf0 [ 28.079544] print_report+0xcc/0x620 [ 28.079966] ? __virt_addr_valid+0x102/0x340 [ 28.080412] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.080861] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.081377] kasan_report+0xbe/0xf0 [ 28.081719] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.082186] vma_interval_tree_remove+0xc75/0xec0 [ 28.082591] vma_prepare+0xc54/0x11a0 [ 28.082904] __split_vma+0x5af/0x950 [ 28.083236] ? __pfx___split_vma+0x10/0x10 [ 28.083583] ? find_held_lock+0x2c/0x110 [ 28.083928] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.084295] ? lock_is_held_type+0x9f/0x120 [ 28.084654] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.085057] ? mtree_range_walk+0x632/0x900 [ 28.085449] ? mas_walk+0x5c7/0x7c0 [ 28.085759] do_vmi_munmap+0x1f1/0x2b0 [ 28.086095] mmap_region+0x1f9/0x2660 [ 28.086406] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.086743] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.087203] ? __pfx_lock_acquire+0x10/0x10 [ 28.087553] ? __pfx_mmap_region+0x10/0x10 [ 28.087907] ? security_mmap_addr+0x7d/0xa0 [ 28.088261] ? get_unmapped_area+0x1f5/0x3f0 [ 28.088654] do_mmap+0x854/0xf00 [ 28.088957] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.089294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.089675] ksys_mmap_pgoff+0x3af/0x500 [ 28.090040] do_syscall_64+0x3f/0x90 [ 28.090364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.090788] RIP: 0033:0x7f194a5a4d82 [ 28.091099] 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 [ 28.092484] RSP: 002b:00007fff2004c708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.093081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f194a5a4d82 [ 28.093627] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19499de000 [ 28.094172] RBP: 00007f19499de000 R08: 0000000000000009 R09: 0000000000001000 [ 28.094730] R10: 0000000000000812 R11: 0000000000000206 R12: 000056151633cec0 [ 28.095287] R13: 00007fff2004c720 R14: 00007fff2004c750 R15: 00007fff2004cab0 [ 28.095853] [ 28.096051] [ 28.096197] Allocated by task 211: [ 28.096479] kasan_save_stack+0x22/0x50 [ 28.096823] kasan_set_track+0x25/0x30 [ 28.097150] __kasan_slab_alloc+0x59/0x70 [ 28.097499] kmem_cache_alloc+0x16b/0x370 [ 28.097842] vm_area_dup+0x20/0x160 [ 28.098170] __split_vma+0x170/0x950 [ 28.098482] split_vma+0xc6/0x110 [ 28.098777] mprotect_fixup+0x8d2/0xb30 [ 28.099117] do_mprotect_pkey+0x87e/0xd40 [ 28.099473] __x64_sys_mprotect+0x78/0xc0 [ 28.099837] do_syscall_64+0x3f/0x90 [ 28.100165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.100601] [ 28.100747] Freed by task 13: [ 28.100985] kasan_save_stack+0x22/0x50 [ 28.101306] kasan_set_track+0x25/0x30 [ 28.101636] kasan_save_free_info+0x2b/0x50 [ 28.101997] __kasan_slab_free+0x10a/0x190 [ 28.102356] kmem_cache_free+0x10d/0x4d0 [ 28.102689] rcu_core+0x8c8/0x2860 [ 28.102988] __do_softirq+0x1b7/0x7d4 [ 28.103314] [ 28.103460] Last potentially related work creation: [ 28.103865] kasan_save_stack+0x22/0x50 [ 28.104202] __kasan_record_aux_stack+0x8e/0xa0 [ 28.104594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.105027] remove_vma+0x139/0x170 [ 28.105334] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.105711] do_vmi_munmap+0x1f1/0x2b0 [ 28.106062] __vm_munmap+0x138/0x3a0 [ 28.106386] __x64_sys_munmap+0x59/0x80 [ 28.106724] do_syscall_64+0x3f/0x90 [ 28.107044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.107475] [ 28.107635] The buggy address belongs to the object at ffff888019e9ecb0 [ 28.107635] which belongs to the cache vm_area_struct of size 168 [ 28.108659] The buggy address is located 88 bytes inside of [ 28.108659] freed 168-byte region [ffff888019e9ecb0, ffff888019e9ed58) [ 28.109626] [ 28.109769] The buggy address belongs to the physical page: [ 28.110233] page:0000000051bfbe64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e9e [ 28.110960] memcg:ffff88800e87e901 [ 28.111248] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.111719] page_type: 0xffffffff() [ 28.112028] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a5a00 dead000000000005 [ 28.112661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e87e901 [ 28.113283] page dumped because: kasan: bad access detected [ 28.113743] [ 28.113883] Memory state around the buggy address: [ 28.114281] ffff888019e9ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.114904] ffff888019e9ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.115484] >ffff888019e9ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.116056] ^ [ 28.116351] ffff888019e9ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.116934] ffff888019e9ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.117512] ================================================================== [ 28.118257] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.781388] BUG: Bad rss-counter state mm:0000000071b83034 type:MM_FILEPAGES val:33 [ 29.782487] BUG: Bad rss-counter state mm:0000000071b83034 type:MM_ANONPAGES val:22 [ 30.224706] BUG: Bad rss-counter state mm:00000000fa723c98 type:MM_FILEPAGES val:33 [ 30.225899] BUG: Bad rss-counter state mm:00000000fa723c98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5285' (ECDSA) to the list of known hosts. 2023/06/21 00:08:31 fuzzer started 2023/06/21 00:08:34 dialing manager at localhost:36067 2023/06/21 00:08:34 checking machine... 2023/06/21 00:08:34 checking revisions... [ 33.574967] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:08:34 testing simple program... [ 33.636894] cgroup: Unknown subsys name 'net' [ 33.729098] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 00:08:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f826dc01338 CR3=0000000005482000 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=00007f826e0ef5100000555c59f01790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fe272f8 RCX=0000000000000000 RDX=ffff8880158c3680 RSI=ffffffff8449ca4b RDI=0000000000000005 RBP=ffff88801cde7200 RSP=ffff88800fe27120 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=000056281b645000 R12=ffff88801cde7280 R13=0000000000000001 R14=ffff88800f10cbc8 R15=0000000000000001 RIP=ffffffff814c089b 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 00007f9643720900 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=00007f96436ff020 CR3=0000000019d7e000 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