[ 35.238106] BUG: Bad rss-counter state mm:000000002bb04c82 type:MM_FILEPAGES val:33 [ 35.239256] BUG: Bad rss-counter state mm:000000002bb04c82 type:MM_ANONPAGES val:22 [ 35.383808] ================================================================== [ 35.384675] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.385568] Read of size 8 at addr ffff888009879b38 by task sshd/218 [ 35.386288] [ 35.386495] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.387311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.388298] Call Trace: [ 35.388600] [ 35.388873] dump_stack_lvl+0x91/0xf0 [ 35.389336] print_report+0xcc/0x620 [ 35.389835] ? __virt_addr_valid+0x102/0x340 [ 35.390367] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.390949] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.391535] kasan_report+0xbe/0xf0 [ 35.391986] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.392574] vma_interval_tree_remove+0xc75/0xec0 [ 35.393150] vma_prepare+0xc54/0x11a0 [ 35.393627] __split_vma+0x5af/0x950 [ 35.394076] ? __pfx___split_vma+0x10/0x10 [ 35.394576] ? find_held_lock+0x2c/0x110 [ 35.395072] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.395611] ? lock_is_held_type+0x9f/0x120 [ 35.396120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.396724] ? mtree_range_walk+0x632/0x900 [ 35.397274] ? mas_walk+0x5c7/0x7c0 [ 35.397763] do_vmi_munmap+0x1f1/0x2b0 [ 35.398259] mmap_region+0x1f9/0x2660 [ 35.398744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.399252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.399955] ? __pfx_lock_acquire+0x10/0x10 [ 35.400558] ? __pfx_mmap_region+0x10/0x10 [ 35.401129] ? security_mmap_addr+0x7d/0xa0 [ 35.401743] ? get_unmapped_area+0x1f5/0x3f0 [ 35.402311] do_mmap+0x854/0xf00 [ 35.402756] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.403249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.403813] ksys_mmap_pgoff+0x3af/0x500 [ 35.404321] do_syscall_64+0x3f/0x90 [ 35.404796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.405446] RIP: 0033:0x7fa2a9f2dd82 [ 35.405917] 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 [ 35.408038] RSP: 002b:00007ffe335c2858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.408938] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2a9f2dd82 [ 35.409789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2a9367000 [ 35.410651] RBP: 00007fa2a9367000 R08: 0000000000000009 R09: 0000000000001000 [ 35.411490] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c26c5af70 [ 35.412339] R13: 00007ffe335c2870 R14: 00007ffe335c28a0 R15: 00007ffe335c2c00 [ 35.413191] [ 35.413478] [ 35.413711] Allocated by task 211: [ 35.414131] kasan_save_stack+0x22/0x50 [ 35.414640] kasan_set_track+0x25/0x30 [ 35.415135] __kasan_slab_alloc+0x59/0x70 [ 35.415659] kmem_cache_alloc+0x16b/0x370 [ 35.416180] vm_area_dup+0x20/0x160 [ 35.416625] __split_vma+0x170/0x950 [ 35.417086] split_vma+0xc6/0x110 [ 35.417529] mprotect_fixup+0x8d2/0xb30 [ 35.418041] do_mprotect_pkey+0x87e/0xd40 [ 35.418557] __x64_sys_mprotect+0x78/0xc0 [ 35.419068] do_syscall_64+0x3f/0x90 [ 35.419542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.420181] [ 35.420394] Freed by task 211: [ 35.420821] kasan_save_stack+0x22/0x50 [ 35.421336] kasan_set_track+0x25/0x30 [ 35.421845] kasan_save_free_info+0x2b/0x50 [ 35.422388] __kasan_slab_free+0x10a/0x190 [ 35.422929] kmem_cache_free+0x10d/0x4d0 [ 35.423454] rcu_core+0x8c8/0x2860 [ 35.423909] __do_softirq+0x1b7/0x7d4 [ 35.424405] [ 35.424620] Last potentially related work creation: [ 35.425224] kasan_save_stack+0x22/0x50 [ 35.425746] __kasan_record_aux_stack+0x8e/0xa0 [ 35.426336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.426992] remove_vma+0x139/0x170 [ 35.427445] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.428006] do_vmi_munmap+0x1f1/0x2b0 [ 35.428504] __vm_munmap+0x138/0x3a0 [ 35.428979] __x64_sys_munmap+0x59/0x80 [ 35.429484] do_syscall_64+0x3f/0x90 [ 35.429978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.430630] [ 35.430853] The buggy address belongs to the object at ffff888009879ae0 [ 35.430853] which belongs to the cache vm_area_struct of size 168 [ 35.432332] The buggy address is located 88 bytes inside of [ 35.432332] freed 168-byte region [ffff888009879ae0, ffff888009879b88) [ 35.433764] [ 35.433981] The buggy address belongs to the physical page: [ 35.434646] page:000000006dca25b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9879 [ 35.435743] memcg:ffff88800f699c01 [ 35.436174] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.436840] page_type: 0xffffffff() [ 35.437306] raw: 0100000000000200 ffff88800879fc80 ffffea000037bc00 dead000000000002 [ 35.438243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f699c01 [ 35.439197] page dumped because: kasan: bad access detected [ 35.439869] [ 35.440095] Memory state around the buggy address: [ 35.440687] ffff888009879a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.441581] ffff888009879a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.442454] >ffff888009879b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.443320] ^ [ 35.443937] ffff888009879b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 35.444819] ffff888009879c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.445698] ================================================================== [ 35.446939] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.015273] BUG: Bad rss-counter state mm:00000000008f01b0 type:MM_FILEPAGES val:33 [ 37.016020] BUG: Bad rss-counter state mm:00000000008f01b0 type:MM_ANONPAGES val:22 [ 37.434947] BUG: Bad rss-counter state mm:000000003090ebf3 type:MM_FILEPAGES val:33 [ 37.435734] BUG: Bad rss-counter state mm:000000003090ebf3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36358' (ECDSA) to the list of known hosts. 2023/06/19 22:39:09 fuzzer started 2023/06/19 22:39:09 dialing manager at localhost:44161 2023/06/19 22:39:09 checking machine... 2023/06/19 22:39:09 checking revisions... [ 38.079837] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:39:09 testing simple program... [ 38.113096] cgroup: Unknown subsys name 'net' [ 38.161017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:38:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f2abba0 RCX=ffff88800f2ab000 RDX=0000000000000080 RSI=ffff88800f2abab0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806ce09da0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffff88800844f780 R13=ffffea0000396f80 R14=ffffffff8186b9c5 R15=ffff8880096f9700 RIP=ffffffff8180ee70 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 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=00007f2f666443a0 CR3=000000000d5ca000 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=8fad4edc3a8564921743a68451b7f8dc XMM02=ec2efd57dc4c00df000000000011c418 XMM03=17be4a027267b933000000000011c4e8 XMM04=bef493593a5fc21700000000000ae988 XMM05=f038fcce306b35a30000000000133d68 XMM06=806171799158d9670000000000132a98 XMM07=e042d86d42eb936e0000000000123558 XMM08=17be4a027267b933000000000011c4e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801620c098 RBX=ffff8880097c2d78 RCX=1ffff11001dc7b1e RDX=dffffc0000000000 RSI=ffff888016202cf8 RDI=ffff8880097c2da8 RBP=ffff88800b866078 RSP=ffff88801c9d7c58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888016202bc0 R13=0000000000000000 R14=ffff88800d59b638 R15=ffff88800d59b5f0 RIP=ffffffff81847508 RFL=00000046 [---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 00007fd41c8e5900 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=00007ffdeb1c8000 CR3=00000000185e2000 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=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000