[ 24.097291] BUG: Bad rss-counter state mm:0000000012be3d0f type:MM_FILEPAGES val:33 [ 24.098582] BUG: Bad rss-counter state mm:0000000012be3d0f type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.215627] ================================================================== [ 24.216374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.217117] Read of size 8 at addr ffff88800db9d798 by task sshd/219 [ 24.217719] [ 24.217884] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.218563] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.219338] Call Trace: [ 24.219579] [ 24.219801] dump_stack_lvl+0x91/0xf0 [ 24.220625] print_report+0xcc/0x620 [ 24.221196] ? __virt_addr_valid+0x102/0x340 [ 24.221622] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.222098] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.222596] kasan_report+0xbe/0xf0 [ 24.222957] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.223446] vma_interval_tree_remove+0xc75/0xec0 [ 24.223913] vma_prepare+0xc54/0x11a0 [ 24.224283] __split_vma+0x5af/0x950 [ 24.224646] ? __pfx___split_vma+0x10/0x10 [ 24.225057] ? find_held_lock+0x2c/0x110 [ 24.225495] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.225936] ? lock_is_held_type+0x9f/0x120 [ 24.226375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.226835] ? mtree_range_walk+0x632/0x900 [ 24.227275] ? mas_walk+0x5c7/0x7c0 [ 24.227633] do_vmi_munmap+0x1f1/0x2b0 [ 24.228003] mmap_region+0x1f9/0x2660 [ 24.228390] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.228781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.229359] ? __pfx_lock_acquire+0x10/0x10 [ 24.229760] ? __pfx_mmap_region+0x10/0x10 [ 24.230146] ? security_mmap_addr+0x7d/0xa0 [ 24.230540] ? get_unmapped_area+0x1f5/0x3f0 [ 24.230935] do_mmap+0x854/0xf00 [ 24.231258] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.231608] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.232009] ksys_mmap_pgoff+0x3af/0x500 [ 24.232385] do_syscall_64+0x3f/0x90 [ 24.232732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.233225] RIP: 0033:0x7f007c3edd82 [ 24.233552] 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 [ 24.235080] RSP: 002b:00007ffd704f6b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.235751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f007c3edd82 [ 24.236356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f007b827000 [ 24.236970] RBP: 00007f007b827000 R08: 0000000000000009 R09: 0000000000001000 [ 24.237601] R10: 0000000000000812 R11: 0000000000000206 R12: 000056462ccfaec0 [ 24.238223] R13: 00007ffd704f6b60 R14: 00007ffd704f6b90 R15: 00007ffd704f6ef0 [ 24.238841] [ 24.239051] [ 24.239220] Allocated by task 212: [ 24.239534] kasan_save_stack+0x22/0x50 [ 24.239888] kasan_set_track+0x25/0x30 [ 24.240248] __kasan_slab_alloc+0x59/0x70 [ 24.240617] kmem_cache_alloc+0x16b/0x370 [ 24.240982] vm_area_dup+0x20/0x160 [ 24.241334] __split_vma+0x170/0x950 [ 24.241669] split_vma+0xc6/0x110 [ 24.241979] mprotect_fixup+0x8d2/0xb30 [ 24.242342] do_mprotect_pkey+0x87e/0xd40 [ 24.242711] __x64_sys_mprotect+0x78/0xc0 [ 24.243078] do_syscall_64+0x3f/0x90 [ 24.243423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.243880] [ 24.244037] Freed by task 212: [ 24.244324] kasan_save_stack+0x22/0x50 [ 24.244684] kasan_set_track+0x25/0x30 [ 24.245023] kasan_save_free_info+0x2b/0x50 [ 24.245431] __kasan_slab_free+0x10a/0x190 [ 24.245821] kmem_cache_free+0x10d/0x4d0 [ 24.246187] rcu_core+0x8c8/0x2860 [ 24.246507] __do_softirq+0x1b7/0x7d4 [ 24.246847] [ 24.247005] Last potentially related work creation: [ 24.247437] kasan_save_stack+0x22/0x50 [ 24.247798] __kasan_record_aux_stack+0x8e/0xa0 [ 24.248204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.248659] remove_vma+0x139/0x170 [ 24.248974] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.249397] do_vmi_munmap+0x1f1/0x2b0 [ 24.249747] __vm_munmap+0x138/0x3a0 [ 24.250071] __x64_sys_munmap+0x59/0x80 [ 24.250436] do_syscall_64+0x3f/0x90 [ 24.250775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.251249] [ 24.251400] The buggy address belongs to the object at ffff88800db9d740 [ 24.251400] which belongs to the cache vm_area_struct of size 168 [ 24.252445] The buggy address is located 88 bytes inside of [ 24.252445] freed 168-byte region [ffff88800db9d740, ffff88800db9d7e8) [ 24.253478] [ 24.253629] The buggy address belongs to the physical page: [ 24.254110] page:00000000071f15f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb9d [ 24.254898] memcg:ffff88800e2bae01 [ 24.255227] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.255721] page_type: 0xffffffff() [ 24.256051] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.256716] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2bae01 [ 24.257383] page dumped because: kasan: bad access detected [ 24.257846] [ 24.257994] Memory state around the buggy address: [ 24.258414] ffff88800db9d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.259018] ffff88800db9d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.259622] >ffff88800db9d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.260235] ^ [ 24.260600] ffff88800db9d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.261272] ffff88800db9d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.261973] ================================================================== [ 24.262706] Disabling lock debugging due to kernel taint [ 26.150796] BUG: Bad rss-counter state mm:000000008ff9ca02 type:MM_FILEPAGES val:33 [ 26.152054] BUG: Bad rss-counter state mm:000000008ff9ca02 type:MM_ANONPAGES val:22 [ 26.520238] BUG: Bad rss-counter state mm:000000003e98d157 type:MM_FILEPAGES val:33 [ 26.521680] BUG: Bad rss-counter state mm:000000003e98d157 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16207' (ECDSA) to the list of known hosts. 2023/06/21 08:12:15 fuzzer started 2023/06/21 08:12:15 dialing manager at localhost:36067 2023/06/21 08:12:15 checking machine... 2023/06/21 08:12:15 checking revisions... [ 27.192705] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:12:15 testing simple program... [ 27.234483] cgroup: Unknown subsys name 'net' [ 27.282024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:12:14 Registers: info registers vcpu 0 RAX=ffffed1001f87f6a RBX=1ffff11001f87f6a RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff856cd6a0 RBP=0000000000000001 RSP=ffff88800fc3fb40 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88800ef88958 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856cd6a0 R15=0000000000000000 RIP=ffffffff812d8eb9 RFL=00000286 [--S--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 00007f97bddeb900 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=00007f97be3a2618 CR3=000000000f592000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806cf09c50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff818276ca R14=dffffc0000000000 R15=ffff888015865010 RIP=ffffffff8180f186 RFL=00000282 [--S----] 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=00007f97bdcef000 CR3=0000000010194000 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=2034313a32313a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a32313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000