[ 24.556548] BUG: Bad rss-counter state mm:0000000030b73838 type:MM_FILEPAGES val:33 [ 24.557740] BUG: Bad rss-counter state mm:0000000030b73838 type:MM_ANONPAGES val:22 [ 24.599378] ================================================================== [ 24.600180] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.601178] Read of size 8 at addr ffff88801a314df0 by task sshd/219 [ 24.601831] [ 24.602013] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.602741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.603726] Call Trace: [ 24.603998] [ 24.604241] dump_stack_lvl+0x91/0xf0 [ 24.604659] print_report+0xcc/0x620 [ 24.605074] ? __virt_addr_valid+0x102/0x340 [ 24.605570] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.606094] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.606615] kasan_report+0xbe/0xf0 [ 24.607020] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.607546] vma_interval_tree_remove+0xc75/0xec0 [ 24.608064] vma_prepare+0xc54/0x11a0 [ 24.608468] __split_vma+0x5af/0x950 [ 24.608870] ? __pfx___split_vma+0x10/0x10 [ 24.609310] ? find_held_lock+0x2c/0x110 [ 24.609751] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.610226] ? lock_is_held_type+0x9f/0x120 [ 24.610683] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.611192] ? mtree_range_walk+0x632/0x900 [ 24.611668] ? mas_walk+0x5c7/0x7c0 [ 24.612069] do_vmi_munmap+0x1f1/0x2b0 [ 24.612487] mmap_region+0x1f9/0x2660 [ 24.612894] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.613334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.613935] ? __pfx_lock_acquire+0x10/0x10 [ 24.614381] ? __pfx_mmap_region+0x10/0x10 [ 24.614827] ? security_mmap_addr+0x7d/0xa0 [ 24.615278] ? get_unmapped_area+0x1f5/0x3f0 [ 24.615749] do_mmap+0x854/0xf00 [ 24.616119] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.616538] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.617016] ksys_mmap_pgoff+0x3af/0x500 [ 24.617447] do_syscall_64+0x3f/0x90 [ 24.617859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.618408] RIP: 0033:0x7f2cabe79d82 [ 24.618794] 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 [ 24.620611] RSP: 002b:00007fffe32b4658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.621376] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2cabe79d82 [ 24.622094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2cab2b3000 [ 24.622810] RBP: 00007f2cab2b3000 R08: 0000000000000009 R09: 0000000000001000 [ 24.623525] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1d9eded90 [ 24.624242] R13: 00007fffe32b4670 R14: 00007fffe32b46a0 R15: 00007fffe32b4a00 [ 24.624971] [ 24.625220] [ 24.625400] Allocated by task 208: [ 24.625766] kasan_save_stack+0x22/0x50 [ 24.626194] kasan_set_track+0x25/0x30 [ 24.626610] __kasan_slab_alloc+0x59/0x70 [ 24.627053] kmem_cache_alloc+0x16b/0x370 [ 24.627487] vm_area_dup+0x20/0x160 [ 24.627873] __split_vma+0x170/0x950 [ 24.628260] split_vma+0xc6/0x110 [ 24.628624] mprotect_fixup+0x8d2/0xb30 [ 24.629042] do_mprotect_pkey+0x87e/0xd40 [ 24.629477] __x64_sys_mprotect+0x78/0xc0 [ 24.629911] do_syscall_64+0x3f/0x90 [ 24.630309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.630844] [ 24.631021] Freed by task 203: [ 24.631349] kasan_save_stack+0x22/0x50 [ 24.631786] kasan_set_track+0x25/0x30 [ 24.632197] kasan_save_free_info+0x2b/0x50 [ 24.632636] __kasan_slab_free+0x10a/0x190 [ 24.633074] kmem_cache_free+0x10d/0x4d0 [ 24.633496] rcu_core+0x8c8/0x2860 [ 24.633864] __do_softirq+0x1b7/0x7d4 [ 24.634264] [ 24.634443] Last potentially related work creation: [ 24.634934] kasan_save_stack+0x22/0x50 [ 24.635354] __kasan_record_aux_stack+0x8e/0xa0 [ 24.635845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.636381] remove_vma+0x139/0x170 [ 24.636755] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.637217] do_vmi_munmap+0x1f1/0x2b0 [ 24.637625] __vm_munmap+0x138/0x3a0 [ 24.638016] __x64_sys_munmap+0x59/0x80 [ 24.638429] do_syscall_64+0x3f/0x90 [ 24.638821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.639360] [ 24.639539] The buggy address belongs to the object at ffff88801a314d98 [ 24.639539] which belongs to the cache vm_area_struct of size 168 [ 24.640772] The buggy address is located 88 bytes inside of [ 24.640772] freed 168-byte region [ffff88801a314d98, ffff88801a314e40) [ 24.641947] [ 24.642126] The buggy address belongs to the physical page: [ 24.642671] page:00000000fd5d0b25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a314 [ 24.643584] memcg:ffff88801a2e9701 [ 24.643962] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.644504] page_type: 0xffffffff() [ 24.644881] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.645642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2e9701 [ 24.646400] page dumped because: kasan: bad access detected [ 24.646950] [ 24.647128] Memory state around the buggy address: [ 24.647617] ffff88801a314c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.648335] ffff88801a314d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.649045] >ffff88801a314d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.649751] ^ [ 24.650418] ffff88801a314e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.651122] ffff88801a314e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.651832] ================================================================== [ 24.652779] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.232651] BUG: Bad rss-counter state mm:000000003cd3f15b type:MM_FILEPAGES val:33 [ 26.233408] BUG: Bad rss-counter state mm:000000003cd3f15b type:MM_ANONPAGES val:22 [ 26.708509] BUG: Bad rss-counter state mm:00000000a77d419d type:MM_FILEPAGES val:33 [ 26.709609] BUG: Bad rss-counter state mm:00000000a77d419d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54676' (ECDSA) to the list of known hosts. 2023/06/21 05:13:43 fuzzer started 2023/06/21 05:13:43 dialing manager at localhost:36067 2023/06/21 05:13:43 checking machine... 2023/06/21 05:13:43 checking revisions... [ 27.437374] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:13:43 testing simple program... [ 27.488653] cgroup: Unknown subsys name 'net' [ 27.535115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:13:42 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=ffff888008c04000 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=00007ffe0efaa6a8 CR3=000000000daf2000 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=2032343a33313a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a33313a3530203132 XMM08=69767265733d7373616c63742030733a 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=0000000000000001 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=00007fd4b92e3020 CR3=000000000d768000 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=1a879c1ee8c663adf94e0e3e8b38630a XMM02=2c67c8bc2e329bc3000000000011abb8 XMM03=fb795ef6d65770560000000000120d38 XMM04=203b239b921e03ee00000000000ae988 XMM05=19e9129bd510f2350000000000131558 XMM06=6b3c7f86ba86d5d70000000000130730 XMM07=e042d86d42eb936e0000000000121010 XMM08=7fc6722a42122d9e000000000011ac18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000