[ 26.633435] BUG: Bad rss-counter state mm:00000000c94cd8df type:MM_FILEPAGES val:33 [ 26.634480] BUG: Bad rss-counter state mm:00000000c94cd8df type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.806902] ================================================================== [ 26.807992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.808963] Read of size 8 at addr ffff88800dcdeb38 by task sshd/218 [ 26.809888] [ 26.810112] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.811023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.812053] Call Trace: [ 26.812403] [ 26.812700] dump_stack_lvl+0x91/0xf0 [ 26.813215] print_report+0xcc/0x620 [ 26.813716] ? __virt_addr_valid+0x102/0x340 [ 26.814293] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.814941] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.815598] kasan_report+0xbe/0xf0 [ 26.816097] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.816742] vma_interval_tree_remove+0xc75/0xec0 [ 26.817375] vma_prepare+0xc54/0x11a0 [ 26.817882] __split_vma+0x5af/0x950 [ 26.818371] ? __pfx___split_vma+0x10/0x10 [ 26.818927] ? find_held_lock+0x2c/0x110 [ 26.819467] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.820094] ? lock_is_held_type+0x9f/0x120 [ 26.820660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.821293] ? mtree_range_walk+0x632/0x900 [ 26.821877] ? mas_walk+0x5c7/0x7c0 [ 26.822370] do_vmi_munmap+0x1f1/0x2b0 [ 26.822881] mmap_region+0x1f9/0x2660 [ 26.823391] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.823946] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.824693] ? __pfx_lock_acquire+0x10/0x10 [ 26.825247] ? __pfx_mmap_region+0x10/0x10 [ 26.825805] ? security_mmap_addr+0x7d/0xa0 [ 26.826359] ? get_unmapped_area+0x1f5/0x3f0 [ 26.826940] do_mmap+0x854/0xf00 [ 26.827400] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.827921] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.828506] ksys_mmap_pgoff+0x3af/0x500 [ 26.829032] do_syscall_64+0x3f/0x90 [ 26.829538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.830209] RIP: 0033:0x7f50f1d8ad82 [ 26.830707] 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 [ 26.832945] RSP: 002b:00007ffd277bde28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.833898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50f1d8ad82 [ 26.834778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50f11c4000 [ 26.835668] RBP: 00007f50f11c4000 R08: 0000000000000009 R09: 0000000000001000 [ 26.836555] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfbdd9bec0 [ 26.837442] R13: 00007ffd277bde40 R14: 00007ffd277bde70 R15: 00007ffd277be1d0 [ 26.838326] [ 26.838625] [ 26.838855] Allocated by task 211: [ 26.839300] kasan_save_stack+0x22/0x50 [ 26.839842] kasan_set_track+0x25/0x30 [ 26.840352] __kasan_slab_alloc+0x59/0x70 [ 26.840900] kmem_cache_alloc+0x16b/0x370 [ 26.841437] vm_area_dup+0x20/0x160 [ 26.841908] __split_vma+0x170/0x950 [ 26.842391] split_vma+0xc6/0x110 [ 26.842846] mprotect_fixup+0x8d2/0xb30 [ 26.843371] do_mprotect_pkey+0x87e/0xd40 [ 26.843933] __x64_sys_mprotect+0x78/0xc0 [ 26.844481] do_syscall_64+0x3f/0x90 [ 26.844974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.845641] [ 26.845866] Freed by task 19: [ 26.846269] kasan_save_stack+0x22/0x50 [ 26.846797] kasan_set_track+0x25/0x30 [ 26.847315] kasan_save_free_info+0x2b/0x50 [ 26.847873] __kasan_slab_free+0x10a/0x190 [ 26.848411] kmem_cache_free+0x10d/0x4d0 [ 26.848947] rcu_core+0x8c8/0x2860 [ 26.849390] __do_softirq+0x1b7/0x7d4 [ 26.849873] [ 26.850086] Last potentially related work creation: [ 26.850692] kasan_save_stack+0x22/0x50 [ 26.851208] __kasan_record_aux_stack+0x8e/0xa0 [ 26.851814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.852464] remove_vma+0x139/0x170 [ 26.852915] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.853479] do_vmi_munmap+0x1f1/0x2b0 [ 26.853965] __vm_munmap+0x138/0x3a0 [ 26.854439] __x64_sys_munmap+0x59/0x80 [ 26.854940] do_syscall_64+0x3f/0x90 [ 26.855414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.856082] [ 26.856305] Second to last potentially related work creation: [ 26.857003] kasan_save_stack+0x22/0x50 [ 26.857521] __kasan_record_aux_stack+0x8e/0xa0 [ 26.858106] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.858765] remove_vma+0x139/0x170 [ 26.859217] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.859806] do_vmi_munmap+0x1f1/0x2b0 [ 26.860290] mmap_region+0x1f9/0x2660 [ 26.860770] do_mmap+0x854/0xf00 [ 26.861199] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.861685] ksys_mmap_pgoff+0x3af/0x500 [ 26.862184] do_syscall_64+0x3f/0x90 [ 26.862682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.863342] [ 26.863584] The buggy address belongs to the object at ffff88800dcdeae0 [ 26.863584] which belongs to the cache vm_area_struct of size 168 [ 26.865067] The buggy address is located 88 bytes inside of [ 26.865067] freed 168-byte region [ffff88800dcdeae0, ffff88800dcdeb88) [ 26.866471] [ 26.866686] The buggy address belongs to the physical page: [ 26.867360] page:0000000022fcdc68 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcde [ 26.868447] memcg:ffff88800e308a01 [ 26.868878] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.869585] page_type: 0xffffffff() [ 26.870042] raw: 0100000000000200 ffff88800879fc80 ffffea000037f540 dead000000000007 [ 26.870958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e308a01 [ 26.871879] page dumped because: kasan: bad access detected [ 26.872535] [ 26.872748] Memory state around the buggy address: [ 26.873327] ffff88800dcdea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.874214] ffff88800dcdea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 26.875079] >ffff88800dcdeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.875961] ^ [ 26.876579] ffff88800dcdeb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 26.877445] ffff88800dcdec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 26.878326] ================================================================== [ 26.879512] Disabling lock debugging due to kernel taint [ 28.901254] BUG: Bad rss-counter state mm:0000000045fff446 type:MM_FILEPAGES val:33 [ 28.902454] BUG: Bad rss-counter state mm:0000000045fff446 type:MM_ANONPAGES val:22 [ 29.465452] BUG: Bad rss-counter state mm:00000000d0f6573d type:MM_FILEPAGES val:33 [ 29.466527] BUG: Bad rss-counter state mm:00000000d0f6573d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39862' (ECDSA) to the list of known hosts. 2023/06/19 11:09:08 fuzzer started 2023/06/19 11:09:08 dialing manager at localhost:44161 2023/06/19 11:09:08 checking machine... 2023/06/19 11:09:08 checking revisions... [ 30.118465] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:09:08 testing simple program... [ 30.168157] cgroup: Unknown subsys name 'net' [ 30.205168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:09:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81ed7e3a RDX=ffff888019f0b680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888018f1fd10 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff888008ed2b70 R14=ffff888008ed2a80 R15=ffffed10033e17c6 RIP=ffffffff814c03b8 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 00007f4d46690900 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=00007f4d4664401c CR3=000000000e97c000 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=0000000000000001 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=00007ffc06faf358 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=00007fc9b6ffc510000055e2abe24790 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