[ 23.101293] BUG: Bad rss-counter state mm:000000007ea21358 type:MM_FILEPAGES val:33 [ 23.101841] BUG: Bad rss-counter state mm:000000007ea21358 type:MM_ANONPAGES val:22 [ 23.234030] ================================================================== [ 23.234713] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.235437] Read of size 8 at addr ffff88801b5363f8 by task sshd/222 [ 23.236022] [ 23.236190] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.236850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.237587] Call Trace: [ 23.237912] [ 23.238218] dump_stack_lvl+0x91/0xf0 [ 23.238594] print_report+0xcc/0x620 [ 23.238968] ? __virt_addr_valid+0x102/0x340 [ 23.239391] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.239858] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.240552] kasan_report+0xbe/0xf0 [ 23.241201] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.241935] vma_interval_tree_remove+0xc75/0xec0 [ 23.242661] vma_prepare+0xc54/0x11a0 [ 23.243233] __split_vma+0x5af/0x950 [ 23.243816] ? __pfx___split_vma+0x10/0x10 [ 23.244482] ? find_held_lock+0x2c/0x110 [ 23.245149] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.245859] ? lock_is_held_type+0x9f/0x120 [ 23.246538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.247300] ? mtree_range_walk+0x632/0x900 [ 23.247986] ? mas_walk+0x5c7/0x7c0 [ 23.248582] do_vmi_munmap+0x1f1/0x2b0 [ 23.249231] mmap_region+0x1f9/0x2660 [ 23.249754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.250314] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.251093] ? __pfx_lock_acquire+0x10/0x10 [ 23.251676] ? __pfx_mmap_region+0x10/0x10 [ 23.252258] ? security_mmap_addr+0x7d/0xa0 [ 23.252843] ? get_unmapped_area+0x1f5/0x3f0 [ 23.253453] do_mmap+0x854/0xf00 [ 23.253925] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.254471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.255088] ksys_mmap_pgoff+0x3af/0x500 [ 23.255641] do_syscall_64+0x3f/0x90 [ 23.256170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.256848] RIP: 0033:0x7fa37de20d82 [ 23.257314] 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 [ 23.259632] RSP: 002b:00007ffd20ad9f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.260595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa37de20d82 [ 23.261503] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa37d25a000 [ 23.262418] RBP: 00007fa37d25a000 R08: 0000000000000009 R09: 0000000000001000 [ 23.263316] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582bc9cab20 [ 23.264177] R13: 00007ffd20ad9f20 R14: 00007ffd20ad9f50 R15: 00007ffd20ada2b0 [ 23.265128] [ 23.265454] [ 23.265685] Allocated by task 206: [ 23.266162] kasan_save_stack+0x22/0x50 [ 23.266711] kasan_set_track+0x25/0x30 [ 23.267258] __kasan_slab_alloc+0x59/0x70 [ 23.267837] kmem_cache_alloc+0x16b/0x370 [ 23.268412] vm_area_dup+0x20/0x160 [ 23.268932] __split_vma+0x170/0x950 [ 23.269448] split_vma+0xc6/0x110 [ 23.269926] mprotect_fixup+0x8d2/0xb30 [ 23.270475] do_mprotect_pkey+0x87e/0xd40 [ 23.270993] __x64_sys_mprotect+0x78/0xc0 [ 23.271539] do_syscall_64+0x3f/0x90 [ 23.272074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.272786] [ 23.273024] Freed by task 200: [ 23.273448] kasan_save_stack+0x22/0x50 [ 23.273985] kasan_set_track+0x25/0x30 [ 23.274518] kasan_save_free_info+0x2b/0x50 [ 23.275087] __kasan_slab_free+0x10a/0x190 [ 23.275660] kmem_cache_free+0x10d/0x4d0 [ 23.276208] rcu_core+0x8c8/0x2860 [ 23.276689] __do_softirq+0x1b7/0x7d4 [ 23.277216] [ 23.277452] Last potentially related work creation: [ 23.278085] kasan_save_stack+0x22/0x50 [ 23.278624] __kasan_record_aux_stack+0x8e/0xa0 [ 23.279322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.280018] remove_vma+0x139/0x170 [ 23.280497] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.281121] do_vmi_munmap+0x1f1/0x2b0 [ 23.281646] __vm_munmap+0x138/0x3a0 [ 23.282148] __x64_sys_munmap+0x59/0x80 [ 23.282692] do_syscall_64+0x3f/0x90 [ 23.283205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.283904] [ 23.284136] The buggy address belongs to the object at ffff88801b5363a0 [ 23.284136] which belongs to the cache vm_area_struct of size 168 [ 23.285726] The buggy address is located 88 bytes inside of [ 23.285726] freed 168-byte region [ffff88801b5363a0, ffff88801b536448) [ 23.287238] [ 23.287472] The buggy address belongs to the physical page: [ 23.288181] page:00000000804502f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b536 [ 23.289370] memcg:ffff88801b512801 [ 23.289836] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.290539] page_type: 0xffffffff() [ 23.291025] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.292013] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b512801 [ 23.292994] page dumped because: kasan: bad access detected [ 23.293708] [ 23.293939] Memory state around the buggy address: [ 23.294553] ffff88801b536280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 23.295415] ffff88801b536300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 23.296345] >ffff88801b536380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.297300] ^ [ 23.298249] ffff88801b536400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.299218] ffff88801b536480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.300173] ================================================================== [ 23.301323] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.209251] BUG: Bad rss-counter state mm:000000001cef67ec type:MM_FILEPAGES val:33 [ 25.210665] BUG: Bad rss-counter state mm:000000001cef67ec type:MM_ANONPAGES val:22 [ 25.611610] BUG: Bad rss-counter state mm:000000003edb46ee type:MM_FILEPAGES val:33 [ 25.612897] BUG: Bad rss-counter state mm:000000003edb46ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52638' (ECDSA) to the list of known hosts. 2023/06/21 00:23:46 fuzzer started 2023/06/21 00:23:47 dialing manager at localhost:36067 2023/06/21 00:23:47 checking machine... 2023/06/21 00:23:47 checking revisions... [ 26.308808] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:23:47 testing simple program... [ 26.361129] cgroup: Unknown subsys name 'net' [ 26.420140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:23:46 Registers: info registers vcpu 0 RAX=1ffffffff0bb2584 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff888016caf498 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f75c7fff700 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=00007f37c91e9008 CR3=000000000e754000 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=2036343a33323a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a33323a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000004000 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff85d3d350 RBP=ffffffff8540a110 RSP=ffff888008e37e58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff81534294 RFL=00000006 [-----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 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=00007ffead5c0000 CR3=000000000d96e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000