[ 34.034614] BUG: Bad rss-counter state mm:00000000c420ed68 type:MM_FILEPAGES val:33 [ 34.036051] BUG: Bad rss-counter state mm:00000000c420ed68 type:MM_ANONPAGES val:22 [ 34.202193] ================================================================== [ 34.203106] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.204046] Read of size 8 at addr ffff888019acd968 by task sshd/219 [ 34.204823] [ 34.205043] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.206078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.207053] Call Trace: [ 34.207376] [ 34.207667] dump_stack_lvl+0x91/0xf0 [ 34.208185] print_report+0xcc/0x620 [ 34.208670] ? __virt_addr_valid+0x102/0x340 [ 34.209219] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.209847] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.210471] kasan_report+0xbe/0xf0 [ 34.210957] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.211582] vma_interval_tree_remove+0xc75/0xec0 [ 34.212188] vma_prepare+0xc54/0x11a0 [ 34.212673] __split_vma+0x5af/0x950 [ 34.213153] ? __pfx___split_vma+0x10/0x10 [ 34.213681] ? find_held_lock+0x2c/0x110 [ 34.214200] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.214765] ? lock_is_held_type+0x9f/0x120 [ 34.215307] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.215921] ? mtree_range_walk+0x632/0x900 [ 34.216499] ? mas_walk+0x5c7/0x7c0 [ 34.216969] do_vmi_munmap+0x1f1/0x2b0 [ 34.217463] mmap_region+0x1f9/0x2660 [ 34.217940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.218451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.219168] ? __pfx_lock_acquire+0x10/0x10 [ 34.219702] ? __pfx_mmap_region+0x10/0x10 [ 34.220239] ? security_mmap_addr+0x7d/0xa0 [ 34.220776] ? get_unmapped_area+0x1f5/0x3f0 [ 34.221326] do_mmap+0x854/0xf00 [ 34.221773] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.222266] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.222828] ksys_mmap_pgoff+0x3af/0x500 [ 34.223331] do_syscall_64+0x3f/0x90 [ 34.223809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.224481] RIP: 0033:0x7ff5460d4d82 [ 34.224937] 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 [ 34.227059] RSP: 002b:00007fff3ac5b038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.227989] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5460d4d82 [ 34.228862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff54550e000 [ 34.229763] RBP: 00007ff54550e000 R08: 0000000000000009 R09: 0000000000001000 [ 34.230676] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fd8559ec0 [ 34.231589] R13: 00007fff3ac5b050 R14: 00007fff3ac5b080 R15: 00007fff3ac5b3e0 [ 34.232525] [ 34.232838] [ 34.233065] Allocated by task 210: [ 34.233529] kasan_save_stack+0x22/0x50 [ 34.234066] kasan_set_track+0x25/0x30 [ 34.234595] __kasan_slab_alloc+0x59/0x70 [ 34.235157] kmem_cache_alloc+0x16b/0x370 [ 34.235705] vm_area_dup+0x20/0x160 [ 34.236212] __split_vma+0x170/0x950 [ 34.236710] split_vma+0xc6/0x110 [ 34.237181] mprotect_fixup+0x8d2/0xb30 [ 34.237713] do_mprotect_pkey+0x87e/0xd40 [ 34.238266] __x64_sys_mprotect+0x78/0xc0 [ 34.238813] do_syscall_64+0x3f/0x90 [ 34.239312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.239990] [ 34.240223] Freed by task 210: [ 34.240644] kasan_save_stack+0x22/0x50 [ 34.241176] kasan_set_track+0x25/0x30 [ 34.241692] kasan_save_free_info+0x2b/0x50 [ 34.242241] __kasan_slab_free+0x10a/0x190 [ 34.242805] kmem_cache_free+0x10d/0x4d0 [ 34.243343] rcu_core+0x8c8/0x2860 [ 34.243805] __do_softirq+0x1b7/0x7d4 [ 34.244315] [ 34.244542] Last potentially related work creation: [ 34.245159] kasan_save_stack+0x22/0x50 [ 34.245692] __kasan_record_aux_stack+0x8e/0xa0 [ 34.246305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.247083] remove_vma+0x139/0x170 [ 34.247565] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.248165] do_vmi_munmap+0x1f1/0x2b0 [ 34.248677] __vm_munmap+0x138/0x3a0 [ 34.249167] __x64_sys_munmap+0x59/0x80 [ 34.249697] do_syscall_64+0x3f/0x90 [ 34.250199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.250873] [ 34.251102] The buggy address belongs to the object at ffff888019acd910 [ 34.251102] which belongs to the cache vm_area_struct of size 168 [ 34.252668] The buggy address is located 88 bytes inside of [ 34.252668] freed 168-byte region [ffff888019acd910, ffff888019acd9b8) [ 34.254158] [ 34.254383] The buggy address belongs to the physical page: [ 34.255076] page:0000000031a80f9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19acd [ 34.256266] memcg:ffff888019b8ba01 [ 34.256724] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.257414] page_type: 0xffffffff() [ 34.257894] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.258864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b8ba01 [ 34.259826] page dumped because: kasan: bad access detected [ 34.260546] [ 34.260772] Memory state around the buggy address: [ 34.261388] ffff888019acd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.262283] ffff888019acd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.263178] >ffff888019acd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.264088] ^ [ 34.264912] ffff888019acd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.265813] ffff888019acda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.266711] ================================================================== [ 34.267679] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.124988] BUG: Bad rss-counter state mm:0000000018963ad5 type:MM_FILEPAGES val:33 [ 36.126157] BUG: Bad rss-counter state mm:0000000018963ad5 type:MM_ANONPAGES val:22 [ 36.626929] BUG: Bad rss-counter state mm:000000007f37ea0b type:MM_FILEPAGES val:33 [ 36.628196] BUG: Bad rss-counter state mm:000000007f37ea0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46438' (ECDSA) to the list of known hosts. 2023/06/19 21:11:01 fuzzer started 2023/06/19 21:11:01 dialing manager at localhost:44161 2023/06/19 21:11:01 checking machine... 2023/06/19 21:11:01 checking revisions... [ 37.225740] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:11:01 testing simple program... [ 37.259719] cgroup: Unknown subsys name 'net' [ 37.318047] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:10:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801c99ff01 RSI=ffff88801c99ff48 RDI=ffff88801c99ff48 RBP=ffff88801c99f980 RSP=ffff88801c99f8b0 R8 =0000000000000001 R9 =ffff88801c99f968 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88801c99f988 R13=ffff88801c99f970 R14=ffff88801c99ff48 R15=ffff88801c99f928 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f428f5f6900 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=00007f428fbae0b0 CR3=000000000f8ea000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f8a53513000 CR3=0000000010256000 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=2031303a31313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a31313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000