[ 31.110001] BUG: Bad rss-counter state mm:000000002c85233a type:MM_FILEPAGES val:33 [ 31.110839] BUG: Bad rss-counter state mm:000000002c85233a type:MM_ANONPAGES val:22 [ 31.204718] ================================================================== [ 31.205474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.206094] Read of size 8 at addr ffff88800e256968 by task sshd/225 [ 31.206598] [ 31.206736] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.207345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208046] Call Trace: [ 31.208275] [ 31.208449] dump_stack_lvl+0x91/0xf0 [ 31.208783] print_report+0xcc/0x620 [ 31.209383] ? __virt_addr_valid+0x102/0x340 [ 31.209824] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210230] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210644] kasan_report+0xbe/0xf0 [ 31.210953] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211382] vma_interval_tree_remove+0xc75/0xec0 [ 31.211829] vma_prepare+0xc54/0x11a0 [ 31.212158] __split_vma+0x5af/0x950 [ 31.212465] ? __pfx___split_vma+0x10/0x10 [ 31.212804] ? find_held_lock+0x2c/0x110 [ 31.213142] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.213500] ? lock_is_held_type+0x9f/0x120 [ 31.213858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.214255] ? mtree_range_walk+0x632/0x900 [ 31.214617] ? mas_walk+0x5c7/0x7c0 [ 31.214926] do_vmi_munmap+0x1f1/0x2b0 [ 31.215264] mmap_region+0x1f9/0x2660 [ 31.215626] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.215999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.216570] ? __pfx_lock_acquire+0x10/0x10 [ 31.216920] ? __pfx_mmap_region+0x10/0x10 [ 31.217286] ? security_mmap_addr+0x7d/0xa0 [ 31.217639] ? get_unmapped_area+0x1f5/0x3f0 [ 31.218010] do_mmap+0x854/0xf00 [ 31.218330] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.218685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.219074] ksys_mmap_pgoff+0x3af/0x500 [ 31.219434] do_syscall_64+0x3f/0x90 [ 31.219762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220272] RIP: 0033:0x7ff9f88a8d82 [ 31.220608] 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 [ 31.222115] RSP: 002b:00007ffd43d163e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.222713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9f88a8d82 [ 31.223263] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9f7ce2000 [ 31.223839] RBP: 00007ff9f7ce2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.224465] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b604c01ec0 [ 31.225027] R13: 00007ffd43d16400 R14: 00007ffd43d16430 R15: 00007ffd43d16790 [ 31.225590] [ 31.225772] [ 31.225906] Allocated by task 217: [ 31.226173] kasan_save_stack+0x22/0x50 [ 31.226509] kasan_set_track+0x25/0x30 [ 31.226832] __kasan_slab_alloc+0x59/0x70 [ 31.227171] kmem_cache_alloc+0x16b/0x370 [ 31.227512] vm_area_dup+0x20/0x160 [ 31.227804] __split_vma+0x170/0x950 [ 31.228135] split_vma+0xc6/0x110 [ 31.228424] mprotect_fixup+0x8d2/0xb30 [ 31.228764] do_mprotect_pkey+0x87e/0xd40 [ 31.229109] __x64_sys_mprotect+0x78/0xc0 [ 31.229459] do_syscall_64+0x3f/0x90 [ 31.229775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230203] [ 31.230350] Freed by task 217: [ 31.230599] kasan_save_stack+0x22/0x50 [ 31.230927] kasan_set_track+0x25/0x30 [ 31.231248] kasan_save_free_info+0x2b/0x50 [ 31.231592] __kasan_slab_free+0x10a/0x190 [ 31.231931] kmem_cache_free+0x10d/0x4d0 [ 31.232288] rcu_core+0x8c8/0x2860 [ 31.232577] __do_softirq+0x1b7/0x7d4 [ 31.232878] [ 31.233017] Last potentially related work creation: [ 31.233391] kasan_save_stack+0x22/0x50 [ 31.233723] __kasan_record_aux_stack+0x8e/0xa0 [ 31.234121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.234556] remove_vma+0x139/0x170 [ 31.234850] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.235249] do_vmi_munmap+0x1f1/0x2b0 [ 31.235609] __vm_munmap+0x138/0x3a0 [ 31.235942] __x64_sys_munmap+0x59/0x80 [ 31.236328] do_syscall_64+0x3f/0x90 [ 31.236661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237119] [ 31.237268] The buggy address belongs to the object at ffff88800e256910 [ 31.237268] which belongs to the cache vm_area_struct of size 168 [ 31.238391] The buggy address is located 88 bytes inside of [ 31.238391] freed 168-byte region [ffff88800e256910, ffff88800e2569b8) [ 31.239356] [ 31.239519] The buggy address belongs to the physical page: [ 31.239981] page:00000000dba727e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe256 [ 31.240777] memcg:ffff88800df59101 [ 31.241089] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.241602] page_type: 0xffffffff() [ 31.241909] raw: 0100000000000200 ffff8880087a0c80 ffffea00003927c0 dead000000000003 [ 31.242539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df59101 [ 31.243190] page dumped because: kasan: bad access detected [ 31.243653] [ 31.243798] Memory state around the buggy address: [ 31.244260] ffff88800e256800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.244918] ffff88800e256880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.245526] >ffff88800e256900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.246121] ^ [ 31.246669] ffff88800e256980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.247239] ffff88800e256a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.247829] ================================================================== [ 31.248544] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.053138] BUG: Bad rss-counter state mm:00000000eb69b111 type:MM_FILEPAGES val:33 [ 33.053817] BUG: Bad rss-counter state mm:00000000eb69b111 type:MM_ANONPAGES val:22 [ 33.445245] BUG: Bad rss-counter state mm:000000004322abb5 type:MM_FILEPAGES val:33 [ 33.445899] BUG: Bad rss-counter state mm:000000004322abb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60112' (ECDSA) to the list of known hosts. 2023/06/21 09:32:02 fuzzer started 2023/06/21 09:32:03 dialing manager at localhost:36067 2023/06/21 09:32:03 checking machine... 2023/06/21 09:32:03 checking revisions... [ 33.991302] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:32:03 testing simple program... [ 34.029279] cgroup: Unknown subsys name 'net' [ 34.067368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:32:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110033faf0d RCX=1ffff110033faefa RDX=ffff88801594b680 RSI=ffffffff81482278 RDI=ffffffff854ee9ec RBP=dffffc0000000000 RSP=ffff888019fd7868 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=63206e6f69737365 R12=ffffffff854ee9e0 R13=ffffffff854ee9e0 R14=ffff88800885d648 R15=1ffff110033faf1d RIP=ffffffff8148256c 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 00007fbe1bda8700 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=00007ffe03ba3248 CR3=0000000016656000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3433325b646873732032303a3233 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323138 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110033c03dc RBX=ffff888019e01ea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019e01ee0 RBP=ffff88800f180658 RSP=ffff88800fc87a98 R8 =0000000000000001 R9 =ffffed1001f90f47 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800f1928c0 R14=ffffffff8366b8df R15=0000000000000024 RIP=ffffffff81846507 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 00007f35aff48900 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=00007ffebe71d000 CR3=000000000e982000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000