[ 31.526757] BUG: Bad rss-counter state mm:0000000011555c98 type:MM_FILEPAGES val:33 [ 31.528066] BUG: Bad rss-counter state mm:0000000011555c98 type:MM_ANONPAGES val:22 [ 31.708143] ================================================================== [ 31.709039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.709981] Read of size 8 at addr ffff88800ed88798 by task sshd/221 [ 31.710740] [ 31.711151] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.712016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.712981] Call Trace: [ 31.713318] [ 31.713598] dump_stack_lvl+0x91/0xf0 [ 31.714088] print_report+0xcc/0x620 [ 31.714564] ? __virt_addr_valid+0x102/0x340 [ 31.715145] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.715751] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716362] kasan_report+0xbe/0xf0 [ 31.716828] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.717455] vma_interval_tree_remove+0xc75/0xec0 [ 31.718050] vma_prepare+0xc54/0x11a0 [ 31.718519] __split_vma+0x5af/0x950 [ 31.718988] ? __pfx___split_vma+0x10/0x10 [ 31.719517] ? find_held_lock+0x2c/0x110 [ 31.720026] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.720576] ? lock_is_held_type+0x9f/0x120 [ 31.721100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.721706] ? mtree_range_walk+0x632/0x900 [ 31.722249] ? mas_walk+0x5c7/0x7c0 [ 31.722727] do_vmi_munmap+0x1f1/0x2b0 [ 31.723213] mmap_region+0x1f9/0x2660 [ 31.723690] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.724194] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.724896] ? __pfx_lock_acquire+0x10/0x10 [ 31.725423] ? __pfx_mmap_region+0x10/0x10 [ 31.725942] ? security_mmap_addr+0x7d/0xa0 [ 31.726464] ? get_unmapped_area+0x1f5/0x3f0 [ 31.727027] do_mmap+0x854/0xf00 [ 31.727455] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.727934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.728492] ksys_mmap_pgoff+0x3af/0x500 [ 31.728984] do_syscall_64+0x3f/0x90 [ 31.729454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.730084] RIP: 0033:0x7fb5863e5d82 [ 31.730530] 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 [ 31.732631] RSP: 002b:00007ffddcd1ac88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.733532] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5863e5d82 [ 31.734405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb58581f000 [ 31.735269] RBP: 00007fb58581f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.736108] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3ac9d9f60 [ 31.736945] R13: 00007ffddcd1aca0 R14: 00007ffddcd1acd0 R15: 00007ffddcd1b030 [ 31.737788] [ 31.738078] [ 31.738292] Allocated by task 212: [ 31.738723] kasan_save_stack+0x22/0x50 [ 31.739242] kasan_set_track+0x25/0x30 [ 31.739724] __kasan_slab_alloc+0x59/0x70 [ 31.740232] kmem_cache_alloc+0x16b/0x370 [ 31.740740] vm_area_dup+0x20/0x160 [ 31.741187] __split_vma+0x170/0x950 [ 31.741646] split_vma+0xc6/0x110 [ 31.742087] mprotect_fixup+0x8d2/0xb30 [ 31.742572] do_mprotect_pkey+0x87e/0xd40 [ 31.743089] __x64_sys_mprotect+0x78/0xc0 [ 31.743605] do_syscall_64+0x3f/0x90 [ 31.744077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.744723] [ 31.744938] Freed by task 212: [ 31.745338] kasan_save_stack+0x22/0x50 [ 31.745830] kasan_set_track+0x25/0x30 [ 31.746315] kasan_save_free_info+0x2b/0x50 [ 31.746842] __kasan_slab_free+0x10a/0x190 [ 31.747370] kmem_cache_free+0x10d/0x4d0 [ 31.747868] rcu_core+0x8c8/0x2860 [ 31.748293] __do_softirq+0x1b7/0x7d4 [ 31.748760] [ 31.748968] Last potentially related work creation: [ 31.749530] kasan_save_stack+0x22/0x50 [ 31.750025] __kasan_record_aux_stack+0x8e/0xa0 [ 31.750581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.751232] remove_vma+0x139/0x170 [ 31.751666] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.752209] do_vmi_munmap+0x1f1/0x2b0 [ 31.752738] __vm_munmap+0x138/0x3a0 [ 31.753197] __x64_sys_munmap+0x59/0x80 [ 31.753693] do_syscall_64+0x3f/0x90 [ 31.754157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.754777] [ 31.754995] Second to last potentially related work creation: [ 31.755660] kasan_save_stack+0x22/0x50 [ 31.756143] __kasan_record_aux_stack+0x8e/0xa0 [ 31.756713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.757332] remove_vma+0x139/0x170 [ 31.757777] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.758316] do_vmi_munmap+0x1f1/0x2b0 [ 31.758796] mmap_region+0x1f9/0x2660 [ 31.759270] do_mmap+0x854/0xf00 [ 31.759687] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.760155] ksys_mmap_pgoff+0x3af/0x500 [ 31.760643] do_syscall_64+0x3f/0x90 [ 31.761102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.761727] [ 31.761940] The buggy address belongs to the object at ffff88800ed88740 [ 31.761940] which belongs to the cache vm_area_struct of size 168 [ 31.763372] The buggy address is located 88 bytes inside of [ 31.763372] freed 168-byte region [ffff88800ed88740, ffff88800ed887e8) [ 31.764746] [ 31.764951] The buggy address belongs to the physical page: [ 31.765582] page:00000000dca92b7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed88 [ 31.766633] memcg:ffff88800decef01 [ 31.767073] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.767744] page_type: 0xffffffff() [ 31.768187] raw: 0100000000000200 ffff8880087a0c80 ffffea0000373180 dead000000000003 [ 31.769082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800decef01 [ 31.769955] page dumped because: kasan: bad access detected [ 31.770599] [ 31.770806] Memory state around the buggy address: [ 31.771404] ffff88800ed88680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.772227] ffff88800ed88700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.773060] >ffff88800ed88780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.773887] ^ [ 31.774358] ffff88800ed88800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.775199] ffff88800ed88880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.776021] ================================================================== [ 31.776903] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.944031] BUG: Bad rss-counter state mm:00000000e611987c type:MM_FILEPAGES val:33 [ 33.945170] BUG: Bad rss-counter state mm:00000000e611987c type:MM_ANONPAGES val:22 [ 34.406237] BUG: Bad rss-counter state mm:00000000ea0166aa type:MM_FILEPAGES val:33 [ 34.407245] BUG: Bad rss-counter state mm:00000000ea0166aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36207' (ECDSA) to the list of known hosts. 2023/06/21 01:03:36 fuzzer started 2023/06/21 01:03:36 dialing manager at localhost:36067 2023/06/21 01:03:36 checking machine... 2023/06/21 01:03:36 checking revisions... [ 35.141454] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:03:36 testing simple program... [ 35.193529] cgroup: Unknown subsys name 'net' [ 35.242158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:03:36 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=00007ffdcb805c98 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=00007fbe06b43510000055993760b790 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=dffffc0000000000 RBX=ffff88801cdd7800 RCX=0000000000000001 RDX=1ffff110039baf0b RSI=ffff88801cdd7a50 RDI=ffff88801cdd7800 RBP=ffff88801cdd7858 RSP=ffff88801cdd77e8 R8 =0000000000000001 R9 =ffff88801cdd7840 R10=0000000000038001 R11=0000000000021eef R12=ffff88801cdd78c8 R13=0000000000000000 R14=ffff888015ded1c0 R15=ffff8880096db5f0 RIP=ffffffff8113038e 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 00007f20a5b6d900 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=00007f20a61250b0 CR3=000000000ef52000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000