[ 23.771710] BUG: Bad rss-counter state mm:00000000516d8130 type:MM_FILEPAGES val:33 [ 23.773593] BUG: Bad rss-counter state mm:00000000516d8130 type:MM_ANONPAGES val:22 [ 23.933213] ================================================================== [ 23.934125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.935066] Read of size 8 at addr ffff88800efd8d08 by task sshd/220 [ 23.935836] [ 23.936055] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.936993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.937985] Call Trace: [ 23.938311] [ 23.938595] dump_stack_lvl+0x91/0xf0 [ 23.939093] print_report+0xcc/0x620 [ 23.939581] ? __virt_addr_valid+0x102/0x340 [ 23.940143] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.940768] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.941393] kasan_report+0xbe/0xf0 [ 23.941885] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.942516] vma_interval_tree_remove+0xc75/0xec0 [ 23.943136] vma_prepare+0xc54/0x11a0 [ 23.943628] __split_vma+0x5af/0x950 [ 23.944104] ? __pfx___split_vma+0x10/0x10 [ 23.944653] ? find_held_lock+0x2c/0x110 [ 23.945195] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.945774] ? lock_is_held_type+0x9f/0x120 [ 23.946325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.946933] ? mtree_range_walk+0x632/0x900 [ 23.947494] ? mas_walk+0x5c7/0x7c0 [ 23.947979] do_vmi_munmap+0x1f1/0x2b0 [ 23.948476] mmap_region+0x1f9/0x2660 [ 23.948966] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.949508] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.950238] ? __pfx_lock_acquire+0x10/0x10 [ 23.950785] ? __pfx_mmap_region+0x10/0x10 [ 23.951315] ? security_mmap_addr+0x7d/0xa0 [ 23.951860] ? get_unmapped_area+0x1f5/0x3f0 [ 23.952422] do_mmap+0x854/0xf00 [ 23.952864] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.953361] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.953950] ksys_mmap_pgoff+0x3af/0x500 [ 23.954467] do_syscall_64+0x3f/0x90 [ 23.954956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.955611] RIP: 0033:0x7f747629cd82 [ 23.956076] 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 [ 23.958253] RSP: 002b:00007fffdc4d7b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.959166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f747629cd82 [ 23.960021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74756d6000 [ 23.960881] RBP: 00007f74756d6000 R08: 0000000000000009 R09: 0000000000001000 [ 23.961741] R10: 0000000000000812 R11: 0000000000000206 R12: 000056216c6c6f60 [ 23.962607] R13: 00007fffdc4d7b90 R14: 00007fffdc4d7bc0 R15: 00007fffdc4d7f20 [ 23.963485] [ 23.963787] [ 23.964008] Allocated by task 213: [ 23.964435] kasan_save_stack+0x22/0x50 [ 23.964947] kasan_set_track+0x25/0x30 [ 23.965446] __kasan_slab_alloc+0x59/0x70 [ 23.965978] kmem_cache_alloc+0x16b/0x370 [ 23.966505] vm_area_dup+0x20/0x160 [ 23.966970] __split_vma+0x170/0x950 [ 23.967437] split_vma+0xc6/0x110 [ 23.967886] mprotect_fixup+0x8d2/0xb30 [ 23.968401] do_mprotect_pkey+0x87e/0xd40 [ 23.968929] __x64_sys_mprotect+0x78/0xc0 [ 23.969477] do_syscall_64+0x3f/0x90 [ 23.969953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.970601] [ 23.970820] Freed by task 213: [ 23.971217] kasan_save_stack+0x22/0x50 [ 23.971731] kasan_set_track+0x25/0x30 [ 23.972233] kasan_save_free_info+0x2b/0x50 [ 23.972765] __kasan_slab_free+0x10a/0x190 [ 23.973300] kmem_cache_free+0x10d/0x4d0 [ 23.973818] rcu_core+0x8c8/0x2860 [ 23.974269] __do_softirq+0x1b7/0x7d4 [ 23.974754] [ 23.974969] Last potentially related work creation: [ 23.975559] kasan_save_stack+0x22/0x50 [ 23.976063] __kasan_record_aux_stack+0x8e/0xa0 [ 23.976648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.977298] remove_vma+0x139/0x170 [ 23.977763] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.978323] do_vmi_munmap+0x1f1/0x2b0 [ 23.978811] __vm_munmap+0x138/0x3a0 [ 23.979342] __x64_sys_munmap+0x59/0x80 [ 23.979870] do_syscall_64+0x3f/0x90 [ 23.980361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.981010] [ 23.981226] The buggy address belongs to the object at ffff88800efd8cb0 [ 23.981226] which belongs to the cache vm_area_struct of size 168 [ 23.982738] The buggy address is located 88 bytes inside of [ 23.982738] freed 168-byte region [ffff88800efd8cb0, ffff88800efd8d58) [ 23.984144] [ 23.984364] The buggy address belongs to the physical page: [ 23.985037] page:0000000077d33212 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefd8 [ 23.986159] memcg:ffff888016b20a01 [ 23.986586] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.987250] page_type: 0xffffffff() [ 23.987704] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.988628] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b20a01 [ 23.989559] page dumped because: kasan: bad access detected [ 23.990232] [ 23.990453] Memory state around the buggy address: [ 23.991036] ffff88800efd8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 23.991917] ffff88800efd8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.992793] >ffff88800efd8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.993667] ^ [ 23.994106] ffff88800efd8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.994975] ffff88800efd8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.995831] ================================================================== [ 23.996852] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.731761] BUG: Bad rss-counter state mm:000000008a9a49cc type:MM_FILEPAGES val:33 [ 25.733004] BUG: Bad rss-counter state mm:000000008a9a49cc type:MM_ANONPAGES val:22 [ 26.162350] BUG: Bad rss-counter state mm:00000000c4955ced type:MM_FILEPAGES val:33 [ 26.163131] BUG: Bad rss-counter state mm:00000000c4955ced type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21678' (ECDSA) to the list of known hosts. 2023/06/20 17:48:22 fuzzer started 2023/06/20 17:48:22 dialing manager at localhost:36067 2023/06/20 17:48:22 checking machine... 2023/06/20 17:48:22 checking revisions... [ 26.790076] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:48:22 testing simple program... [ 26.837961] cgroup: Unknown subsys name 'net' [ 26.885899] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:48:22 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800d9da260 RCX=ffff88800d9da260 RDX=00000000000d000d RSI=ffff88800d9da260 RDI=ffff88800844f780 RBP=ffff88800ef3fc88 RSP=ffff88800ef3fbf0 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000367680 R11=00000000000d000c R12=ffffea0000367680 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809672 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 00007ff9b9fa4900 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=00007ffffc8d8000 CR3=000000000eb60000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=ffffffff860d8256 RDX=1ffff1100d9e1353 RSI=ffff88806cf09bc8 RDI=ffff88806cf09a98 RBP=ffff88806cf09bc8 RSP=ffff88806cf099f0 R8 =ffffffff860d825a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff88806cf09bd0 R15=ffff88806cf09a98 RIP=ffffffff81130416 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 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=00007fe1c9e2a010 CR3=000000000fd1a000 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=2032323a38343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a38343a3731203032 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000