[ 30.928114] BUG: Bad rss-counter state mm:000000004605b797 type:MM_FILEPAGES val:33 [ 30.929119] BUG: Bad rss-counter state mm:000000004605b797 type:MM_ANONPAGES val:22 [ 31.098585] ================================================================== [ 31.099555] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.100553] Read of size 8 at addr ffff88800edfb4e0 by task sshd/220 [ 31.101375] [ 31.101709] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.102622] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.103657] Call Trace: [ 31.103996] [ 31.104296] dump_stack_lvl+0x91/0xf0 [ 31.104823] print_report+0xcc/0x620 [ 31.105372] ? __virt_addr_valid+0x102/0x340 [ 31.105962] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106620] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.107278] kasan_report+0xbe/0xf0 [ 31.107794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.108463] vma_interval_tree_remove+0xc75/0xec0 [ 31.109112] vma_prepare+0xc54/0x11a0 [ 31.109627] __split_vma+0x5af/0x950 [ 31.110128] ? __pfx___split_vma+0x10/0x10 [ 31.110687] ? find_held_lock+0x2c/0x110 [ 31.111246] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.111849] ? lock_is_held_type+0x9f/0x120 [ 31.112422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.113076] ? mtree_range_walk+0x632/0x900 [ 31.113661] ? mas_walk+0x5c7/0x7c0 [ 31.114171] do_vmi_munmap+0x1f1/0x2b0 [ 31.114694] mmap_region+0x1f9/0x2660 [ 31.115211] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.115760] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.116519] ? __pfx_lock_acquire+0x10/0x10 [ 31.117132] ? __pfx_mmap_region+0x10/0x10 [ 31.117705] ? security_mmap_addr+0x7d/0xa0 [ 31.118278] ? get_unmapped_area+0x1f5/0x3f0 [ 31.118863] do_mmap+0x854/0xf00 [ 31.119347] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.119886] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.120481] ksys_mmap_pgoff+0x3af/0x500 [ 31.121023] do_syscall_64+0x3f/0x90 [ 31.121539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122229] RIP: 0033:0x7fccc8ef2d82 [ 31.122710] 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 [ 31.124968] RSP: 002b:00007fff5cce7428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.125921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccc8ef2d82 [ 31.126822] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccc832c000 [ 31.127720] RBP: 00007fccc832c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.128623] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c7d43bec0 [ 31.129541] R13: 00007fff5cce7440 R14: 00007fff5cce7470 R15: 00007fff5cce77d0 [ 31.130452] [ 31.130764] [ 31.130991] Allocated by task 213: [ 31.131450] kasan_save_stack+0x22/0x50 [ 31.131989] kasan_set_track+0x25/0x30 [ 31.132513] __kasan_slab_alloc+0x59/0x70 [ 31.133078] kmem_cache_alloc+0x16b/0x370 [ 31.133630] vm_area_dup+0x20/0x160 [ 31.134107] __split_vma+0x170/0x950 [ 31.134603] split_vma+0xc6/0x110 [ 31.135072] mprotect_fixup+0x8d2/0xb30 [ 31.135602] do_mprotect_pkey+0x87e/0xd40 [ 31.136155] __x64_sys_mprotect+0x78/0xc0 [ 31.136712] do_syscall_64+0x3f/0x90 [ 31.137235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137925] [ 31.138155] Freed by task 213: [ 31.138571] kasan_save_stack+0x22/0x50 [ 31.139106] kasan_set_track+0x25/0x30 [ 31.139629] kasan_save_free_info+0x2b/0x50 [ 31.140195] __kasan_slab_free+0x10a/0x190 [ 31.140764] kmem_cache_free+0x10d/0x4d0 [ 31.141332] rcu_core+0x8c8/0x2860 [ 31.141821] __do_softirq+0x1b7/0x7d4 [ 31.142356] [ 31.142591] Last potentially related work creation: [ 31.143244] kasan_save_stack+0x22/0x50 [ 31.143809] __kasan_record_aux_stack+0x8e/0xa0 [ 31.144454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.145186] remove_vma+0x139/0x170 [ 31.145692] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.146312] do_vmi_munmap+0x1f1/0x2b0 [ 31.146856] __vm_munmap+0x138/0x3a0 [ 31.147383] __x64_sys_munmap+0x59/0x80 [ 31.147938] do_syscall_64+0x3f/0x90 [ 31.148468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.149196] [ 31.149431] The buggy address belongs to the object at ffff88800edfb488 [ 31.149431] which belongs to the cache vm_area_struct of size 168 [ 31.151054] The buggy address is located 88 bytes inside of [ 31.151054] freed 168-byte region [ffff88800edfb488, ffff88800edfb530) [ 31.152538] [ 31.152766] The buggy address belongs to the physical page: [ 31.153490] page:000000004a646a94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedfb [ 31.154648] memcg:ffff88800df58401 [ 31.155106] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.155784] page_type: 0xffffffff() [ 31.156258] raw: 0100000000000200 ffff8880087a0c80 ffffea00003714c0 dead00000000000a [ 31.157242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df58401 [ 31.158194] page dumped because: kasan: bad access detected [ 31.158889] [ 31.159121] Memory state around the buggy address: [ 31.159741] ffff88800edfb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.160655] ffff88800edfb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.161561] >ffff88800edfb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.162455] ^ [ 31.163245] ffff88800edfb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.164152] ffff88800edfb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.165042] ================================================================== [ 31.166141] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.283864] BUG: Bad rss-counter state mm:00000000da389717 type:MM_FILEPAGES val:33 [ 33.285153] BUG: Bad rss-counter state mm:00000000da389717 type:MM_ANONPAGES val:22 [ 33.809978] BUG: Bad rss-counter state mm:00000000b1f031ba type:MM_FILEPAGES val:33 [ 33.811145] BUG: Bad rss-counter state mm:00000000b1f031ba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42194' (ECDSA) to the list of known hosts. 2023/06/20 14:40:32 fuzzer started 2023/06/20 14:40:33 dialing manager at localhost:36067 2023/06/20 14:40:33 checking machine... 2023/06/20 14:40:33 checking revisions... [ 34.442976] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:40:33 testing simple program... [ 34.498246] cgroup: Unknown subsys name 'net' [ 34.537883] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:40:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801009a000 RCX=0000000000000000 RDX=ffff88800f3d51c0 RSI=ffffffff81acb8d7 RDI=ffff888015cf2a50 RBP=ffff888015cf2a50 RSP=ffff88800d977940 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=0000000000000001 R15=000000000000171f RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb186e73900 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=00007fb1862e66e0 CR3=00000000094b4000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4799a0b251d9618c00000000000ae988 XMM05=517541664b8f6b6e0000000000133f00 XMM06=4fda316b135da52b0000000000132c30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000559d6e389890 RBX=0000559d6e38a600 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000001 RDI=0000559d6e38677e RBP=0000000000000000 RSP=00007ffcd7c17000 R8 =0000000000000004 R9 =0000000000000006 R10=00007ff94fc8de10 R11=0000000000000006 R12=0000000000000000 R13=0000559d6e385350 R14=0000000000000000 R15=0000000000000000 RIP=00007ff950261146 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff94f73b900 00000000 00000000 GS =0000 0000000000000000 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=00007ffcd7c11000 CR3=000000000d48c000 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=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