[ 24.044255] BUG: Bad rss-counter state mm:00000000b5963375 type:MM_FILEPAGES val:33 [ 24.045699] BUG: Bad rss-counter state mm:00000000b5963375 type:MM_ANONPAGES val:22 [ 24.207358] ================================================================== [ 24.208329] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.209278] Read of size 8 at addr ffff88800da3c228 by task sshd/219 [ 24.210242] [ 24.210468] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.211376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.212376] Call Trace: [ 24.212707] <TASK> [ 24.212992] dump_stack_lvl+0x91/0xf0 [ 24.213508] print_report+0xcc/0x620 [ 24.214062] ? __virt_addr_valid+0x102/0x340 [ 24.214651] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.215295] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.215945] kasan_report+0xbe/0xf0 [ 24.216433] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.217059] vma_interval_tree_remove+0xc75/0xec0 [ 24.217665] vma_prepare+0xc54/0x11a0 [ 24.218163] __split_vma+0x5af/0x950 [ 24.218634] ? __pfx___split_vma+0x10/0x10 [ 24.219169] ? find_held_lock+0x2c/0x110 [ 24.219692] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.220267] ? lock_is_held_type+0x9f/0x120 [ 24.220828] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.221455] ? mtree_range_walk+0x632/0x900 [ 24.222018] ? mas_walk+0x5c7/0x7c0 [ 24.222499] do_vmi_munmap+0x1f1/0x2b0 [ 24.222996] mmap_region+0x1f9/0x2660 [ 24.223480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.224018] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.224743] ? __pfx_lock_acquire+0x10/0x10 [ 24.225282] ? __pfx_mmap_region+0x10/0x10 [ 24.225816] ? security_mmap_addr+0x7d/0xa0 [ 24.226364] ? get_unmapped_area+0x1f5/0x3f0 [ 24.226917] do_mmap+0x854/0xf00 [ 24.227353] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.227843] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.228406] ksys_mmap_pgoff+0x3af/0x500 [ 24.228915] do_syscall_64+0x3f/0x90 [ 24.229395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.230078] RIP: 0033:0x7f7411e48d82 [ 24.230557] 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 [ 24.232729] RSP: 002b:00007ffd5141a408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.233661] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7411e48d82 [ 24.234569] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7411282000 [ 24.235459] RBP: 00007f7411282000 R08: 0000000000000009 R09: 0000000000001000 [ 24.236311] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea488ecec0 [ 24.237156] R13: 00007ffd5141a420 R14: 00007ffd5141a450 R15: 00007ffd5141a7b0 [ 24.238017] </TASK> [ 24.238327] [ 24.238546] Allocated by task 212: [ 24.238986] kasan_save_stack+0x22/0x50 [ 24.239494] kasan_set_track+0x25/0x30 [ 24.239988] __kasan_slab_alloc+0x59/0x70 [ 24.240510] kmem_cache_alloc+0x16b/0x370 [ 24.241027] vm_area_dup+0x20/0x160 [ 24.241483] __split_vma+0x170/0x950 [ 24.241946] split_vma+0xc6/0x110 [ 24.242399] mprotect_fixup+0x8d2/0xb30 [ 24.242899] do_mprotect_pkey+0x87e/0xd40 [ 24.243418] __x64_sys_mprotect+0x78/0xc0 [ 24.243986] do_syscall_64+0x3f/0x90 [ 24.244474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.245123] [ 24.245337] Freed by task 19: [ 24.245722] kasan_save_stack+0x22/0x50 [ 24.246245] kasan_set_track+0x25/0x30 [ 24.246746] kasan_save_free_info+0x2b/0x50 [ 24.247281] __kasan_slab_free+0x10a/0x190 [ 24.247818] kmem_cache_free+0x10d/0x4d0 [ 24.248335] rcu_core+0x8c8/0x2860 [ 24.248795] __do_softirq+0x1b7/0x7d4 [ 24.249292] [ 24.249513] Last potentially related work creation: [ 24.250132] kasan_save_stack+0x22/0x50 [ 24.250633] __kasan_record_aux_stack+0x8e/0xa0 [ 24.251288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.251930] remove_vma+0x139/0x170 [ 24.252381] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.252969] do_vmi_munmap+0x1f1/0x2b0 [ 24.253459] __vm_munmap+0x138/0x3a0 [ 24.253955] __x64_sys_munmap+0x59/0x80 [ 24.254491] do_syscall_64+0x3f/0x90 [ 24.254980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.255636] [ 24.255851] The buggy address belongs to the object at ffff88800da3c1d0 [ 24.255851] which belongs to the cache vm_area_struct of size 168 [ 24.257322] The buggy address is located 88 bytes inside of [ 24.257322] freed 168-byte region [ffff88800da3c1d0, ffff88800da3c278) [ 24.258757] [ 24.258982] The buggy address belongs to the physical page: [ 24.259674] page:0000000024999973 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda3c [ 24.260825] memcg:ffff88800f6aaf01 [ 24.261280] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.262046] page_type: 0xffffffff() [ 24.262522] raw: 0100000000000200 ffff8880087a0c80 ffffea0000368e40 0000000000000003 [ 24.263488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6aaf01 [ 24.264449] page dumped because: kasan: bad access detected [ 24.265143] [ 24.265368] Memory state around the buggy address: [ 24.265978] ffff88800da3c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.266889] ffff88800da3c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.267797] >ffff88800da3c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.268693] ^ [ 24.269274] ffff88800da3c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.270202] ffff88800da3c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.271080] ================================================================== [ 24.272069] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.625439] BUG: Bad rss-counter state mm:000000004db3bd1a type:MM_FILEPAGES val:33 [ 26.626769] BUG: Bad rss-counter state mm:000000004db3bd1a type:MM_ANONPAGES val:22 [ 27.123980] BUG: Bad rss-counter state mm:00000000e592771e type:MM_FILEPAGES val:33 [ 27.125160] BUG: Bad rss-counter state mm:00000000e592771e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60376' (ECDSA) to the list of known hosts. 2023/06/21 02:43:55 fuzzer started 2023/06/21 02:43:56 dialing manager at localhost:36067 2023/06/21 02:43:56 checking machine... 2023/06/21 02:43:56 checking revisions... [ 27.829452] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:43:56 testing simple program... [ 27.867560] cgroup: Unknown subsys name 'net' [ 27.907124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:43:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a50 RCX=ffff88806ce09af0 RDX=1ffff1100d9c1355 RSI=ffff88806ce09ae8 RDI=ffffffff813ad720 RBP=ffff88806ce09aa8 RSP=ffff88806ce09a38 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b18 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888016b27900 RIP=ffffffff811303b2 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 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=00007ff0a21e3c70 CR3=000000000c78a000 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=746ba746bc54a3b84848495763d4f699 XMM02=000000000011a640d59e07bde36eea69 XMM03=000000000011a768ec2efd57dc4c00df XMM04=ecdf5843d397fc0d00000000000ae988 XMM05=570ef18b7a12a7e80000000000132430 XMM06=806171799158d9670000000000130eb0 XMM07=fb795ef6d657705600000000001211e8 XMM08=2c67c8bc2e329bc3000000000011a768 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000b6e62bdc RBX=ffff88806cf39500 RCX=0000000000000001 RDX=0000000000000012 RSI=0000000000000004 RDI=ffffffff8709f040 RBP=1ffff1100d9e1395 RSP=ffff88806cf09c68 R8 =0000000000000001 R9 =ffffed100d9e13a3 R10=0000000000000003 R11=ffff88806cf09ff8 R12=ffff88806cf39500 R13=ffff88806cf39fe0 R14=ffff88806cf39f08 R15=ffff888008e0d1c0 RIP=ffffffff8451151e RFL=00000002 [-------] 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=00007f8122b93618 CR3=0000000019c8a000 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=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