[ 24.011286] BUG: Bad rss-counter state mm:00000000a84cce6b type:MM_FILEPAGES val:33 [ 24.012361] BUG: Bad rss-counter state mm:00000000a84cce6b type:MM_ANONPAGES val:22 [ 24.180938] ================================================================== [ 24.181876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.182853] Read of size 8 at addr ffff88801a11a5c8 by task sshd/220 [ 24.183661] [ 24.183889] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.184921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.185938] Call Trace: [ 24.186286] [ 24.186579] dump_stack_lvl+0x91/0xf0 [ 24.187086] print_report+0xcc/0x620 [ 24.187586] ? __virt_addr_valid+0x102/0x340 [ 24.188164] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.188813] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.189457] kasan_report+0xbe/0xf0 [ 24.189950] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.190595] vma_interval_tree_remove+0xc75/0xec0 [ 24.191228] vma_prepare+0xc54/0x11a0 [ 24.191725] __split_vma+0x5af/0x950 [ 24.192212] ? __pfx___split_vma+0x10/0x10 [ 24.192773] ? find_held_lock+0x2c/0x110 [ 24.193311] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.193894] ? lock_is_held_type+0x9f/0x120 [ 24.194451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.195083] ? mtree_range_walk+0x632/0x900 [ 24.195659] ? mas_walk+0x5c7/0x7c0 [ 24.196148] do_vmi_munmap+0x1f1/0x2b0 [ 24.196687] mmap_region+0x1f9/0x2660 [ 24.197186] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.197717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.198471] ? __pfx_lock_acquire+0x10/0x10 [ 24.199024] ? __pfx_mmap_region+0x10/0x10 [ 24.199577] ? security_mmap_addr+0x7d/0xa0 [ 24.200134] ? get_unmapped_area+0x1f5/0x3f0 [ 24.200722] do_mmap+0x854/0xf00 [ 24.201180] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.201695] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.202279] ksys_mmap_pgoff+0x3af/0x500 [ 24.202815] do_syscall_64+0x3f/0x90 [ 24.203318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.203999] RIP: 0033:0x7fdae5177d82 [ 24.204471] 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 [ 24.206734] RSP: 002b:00007ffcd7bfa7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.207683] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdae5177d82 [ 24.208576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdae45b1000 [ 24.209474] RBP: 00007fdae45b1000 R08: 0000000000000009 R09: 0000000000001000 [ 24.210364] R10: 0000000000000812 R11: 0000000000000206 R12: 000056436cb87ec0 [ 24.211247] R13: 00007ffcd7bfa7f0 R14: 00007ffcd7bfa820 R15: 00007ffcd7bfab80 [ 24.212142] [ 24.212447] [ 24.212677] Allocated by task 213: [ 24.213127] kasan_save_stack+0x22/0x50 [ 24.213656] kasan_set_track+0x25/0x30 [ 24.214166] __kasan_slab_alloc+0x59/0x70 [ 24.214714] kmem_cache_alloc+0x16b/0x370 [ 24.215256] vm_area_dup+0x20/0x160 [ 24.215730] __split_vma+0x170/0x950 [ 24.216215] split_vma+0xc6/0x110 [ 24.216694] mprotect_fixup+0x8d2/0xb30 [ 24.217217] do_mprotect_pkey+0x87e/0xd40 [ 24.217755] __x64_sys_mprotect+0x78/0xc0 [ 24.218303] do_syscall_64+0x3f/0x90 [ 24.218807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.219477] [ 24.219699] Freed by task 204: [ 24.220110] kasan_save_stack+0x22/0x50 [ 24.220648] kasan_set_track+0x25/0x30 [ 24.221172] kasan_save_free_info+0x2b/0x50 [ 24.221739] __kasan_slab_free+0x10a/0x190 [ 24.222306] kmem_cache_free+0x10d/0x4d0 [ 24.222848] rcu_core+0x8c8/0x2860 [ 24.223324] __do_softirq+0x1b7/0x7d4 [ 24.223833] [ 24.224053] Last potentially related work creation: [ 24.224685] kasan_save_stack+0x22/0x50 [ 24.225226] __kasan_record_aux_stack+0x8e/0xa0 [ 24.225841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.226525] remove_vma+0x139/0x170 [ 24.227001] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.227594] do_vmi_munmap+0x1f1/0x2b0 [ 24.228107] __vm_munmap+0x138/0x3a0 [ 24.228606] __x64_sys_munmap+0x59/0x80 [ 24.229147] do_syscall_64+0x3f/0x90 [ 24.229656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.230340] [ 24.230568] The buggy address belongs to the object at ffff88801a11a570 [ 24.230568] which belongs to the cache vm_area_struct of size 168 [ 24.232148] The buggy address is located 88 bytes inside of [ 24.232148] freed 168-byte region [ffff88801a11a570, ffff88801a11a618) [ 24.233669] [ 24.233895] The buggy address belongs to the physical page: [ 24.234600] page:0000000016956eee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a11a [ 24.235778] memcg:ffff88800fbf5901 [ 24.236236] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.236939] page_type: 0xffffffff() [ 24.237420] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.238409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbf5901 [ 24.239385] page dumped because: kasan: bad access detected [ 24.240094] [ 24.240323] Memory state around the buggy address: [ 24.240958] ffff88801a11a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.241885] ffff88801a11a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.242804] >ffff88801a11a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.243722] ^ [ 24.244440] ffff88801a11a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.245385] ffff88801a11a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.246300] ================================================================== [ 24.247348] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.209697] BUG: Bad rss-counter state mm:00000000932ef2d1 type:MM_FILEPAGES val:33 [ 26.210864] BUG: Bad rss-counter state mm:00000000932ef2d1 type:MM_ANONPAGES val:22 [ 26.727124] BUG: Bad rss-counter state mm:00000000f70b30d2 type:MM_FILEPAGES val:33 [ 26.728335] BUG: Bad rss-counter state mm:00000000f70b30d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45500' (ECDSA) to the list of known hosts. 2023/06/20 11:04:13 fuzzer started 2023/06/20 11:04:14 dialing manager at localhost:36067 2023/06/20 11:04:14 checking machine... 2023/06/20 11:04:14 checking revisions... [ 27.362932] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:04:14 testing simple program... [ 27.420113] cgroup: Unknown subsys name 'net' [ 27.465601] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:04:13 Registers: info registers vcpu 0 RAX=000000000000000f RBX=ffff88801a32bc40 RCX=0000000000000000 RDX=1ffff1100346578b RSI=ffffffff81f05465 RDI=ffff88801a32bc40 RBP=ffff8880162aa000 RSP=ffff888019f97cb0 R8 =00000000ea3fd1bd R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000dc0 R13=0000000000000dc0 R14=0000000000000010 R15=ffff8880162aa000 RIP=ffffffff81f054f7 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 00007f85a44fb900 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=00007f85a4ab30b0 CR3=000000000f560000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001b0ce95 RCX=0000000000000000 RDX=ffff8880160ad1c0 RSI=ffffffff819678c3 RDI=ffff88800d8674c8 RBP=0000000000000000 RSP=ffff88800d8674a8 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=00676f6c7379732f R12=0000000000000000 R13=ffffffff854ee9e0 R14=ffff88800c288cc0 R15=ffff8880160ad1c0 RIP=ffffffff819678c3 RFL=00000293 [--S-A-C] 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 00007f2a72664900 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=00007f2a71af7ec0 CR3=000000000e284000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=5d03e6e86a21900d00000000000ae988 XMM05=d13e5866ac3870a700000000001323d8 XMM06=4fda316b135da52b0000000000130e58 XMM07=fb795ef6d657705600000000001210f0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000