[ 24.049931] BUG: Bad rss-counter state mm:00000000e62ad8cf type:MM_FILEPAGES val:33 [ 24.051975] BUG: Bad rss-counter state mm:00000000e62ad8cf type:MM_ANONPAGES val:22 [ 24.217588] ================================================================== [ 24.218506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.219454] Read of size 8 at addr ffff8880147833f8 by task sshd/218 [ 24.220256] [ 24.220580] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.221457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.222450] Call Trace: [ 24.222775] [ 24.223062] dump_stack_lvl+0x91/0xf0 [ 24.223555] print_report+0xcc/0x620 [ 24.224046] ? __virt_addr_valid+0x102/0x340 [ 24.224594] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.225207] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.225848] kasan_report+0xbe/0xf0 [ 24.226330] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.226957] vma_interval_tree_remove+0xc75/0xec0 [ 24.227552] vma_prepare+0xc54/0x11a0 [ 24.228042] __split_vma+0x5af/0x950 [ 24.228516] ? __pfx___split_vma+0x10/0x10 [ 24.229050] ? find_held_lock+0x2c/0x110 [ 24.229579] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.230157] ? lock_is_held_type+0x9f/0x120 [ 24.230698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.231317] ? mtree_range_walk+0x632/0x900 [ 24.231864] ? mas_walk+0x5c7/0x7c0 [ 24.232344] do_vmi_munmap+0x1f1/0x2b0 [ 24.232836] mmap_region+0x1f9/0x2660 [ 24.233317] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.233850] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.234560] ? __pfx_lock_acquire+0x10/0x10 [ 24.235093] ? __pfx_mmap_region+0x10/0x10 [ 24.235618] ? security_mmap_addr+0x7d/0xa0 [ 24.236154] ? get_unmapped_area+0x1f5/0x3f0 [ 24.236700] do_mmap+0x854/0xf00 [ 24.237139] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.237643] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.238205] ksys_mmap_pgoff+0x3af/0x500 [ 24.238707] do_syscall_64+0x3f/0x90 [ 24.239185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.239835] RIP: 0033:0x7f9e13801d82 [ 24.240291] 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 [ 24.242418] RSP: 002b:00007ffcd7e3a1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.243317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e13801d82 [ 24.244159] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e12c3b000 [ 24.245006] RBP: 00007f9e12c3b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.245873] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2963feec0 [ 24.246718] R13: 00007ffcd7e3a1e0 R14: 00007ffcd7e3a210 R15: 00007ffcd7e3a570 [ 24.247573] [ 24.247863] [ 24.248081] Allocated by task 211: [ 24.248510] kasan_save_stack+0x22/0x50 [ 24.249021] kasan_set_track+0x25/0x30 [ 24.249510] __kasan_slab_alloc+0x59/0x70 [ 24.250042] kmem_cache_alloc+0x16b/0x370 [ 24.250553] vm_area_dup+0x20/0x160 [ 24.251016] __split_vma+0x170/0x950 [ 24.251476] split_vma+0xc6/0x110 [ 24.251930] mprotect_fixup+0x8d2/0xb30 [ 24.252434] do_mprotect_pkey+0x87e/0xd40 [ 24.252958] __x64_sys_mprotect+0x78/0xc0 [ 24.253493] do_syscall_64+0x3f/0x90 [ 24.253991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.254642] [ 24.254864] Freed by task 13: [ 24.255254] kasan_save_stack+0x22/0x50 [ 24.255753] kasan_set_track+0x25/0x30 [ 24.256249] kasan_save_free_info+0x2b/0x50 [ 24.256785] __kasan_slab_free+0x10a/0x190 [ 24.257322] kmem_cache_free+0x10d/0x4d0 [ 24.257860] rcu_core+0x8c8/0x2860 [ 24.258312] __do_softirq+0x1b7/0x7d4 [ 24.258793] [ 24.259010] Last potentially related work creation: [ 24.259600] kasan_save_stack+0x22/0x50 [ 24.260116] __kasan_record_aux_stack+0x8e/0xa0 [ 24.260692] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.261328] remove_vma+0x139/0x170 [ 24.261794] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.262347] do_vmi_munmap+0x1f1/0x2b0 [ 24.262829] __vm_munmap+0x138/0x3a0 [ 24.263304] __x64_sys_munmap+0x59/0x80 [ 24.263797] do_syscall_64+0x3f/0x90 [ 24.264278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.264924] [ 24.265142] The buggy address belongs to the object at ffff8880147833a0 [ 24.265142] which belongs to the cache vm_area_struct of size 168 [ 24.266625] The buggy address is located 88 bytes inside of [ 24.266625] freed 168-byte region [ffff8880147833a0, ffff888014783448) [ 24.268027] [ 24.268240] The buggy address belongs to the physical page: [ 24.268893] page:00000000796aa853 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14783 [ 24.270005] memcg:ffff8880147ccb01 [ 24.270437] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.271080] page_type: 0xffffffff() [ 24.271534] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.272460] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147ccb01 [ 24.273375] page dumped because: kasan: bad access detected [ 24.274079] [ 24.274293] Memory state around the buggy address: [ 24.274890] ffff888014783280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.275755] ffff888014783300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.276612] >ffff888014783380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.277480] ^ [ 24.278373] ffff888014783400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.279255] ffff888014783480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.280137] ================================================================== [ 24.281162] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.657804] BUG: Bad rss-counter state mm:00000000f2e75329 type:MM_FILEPAGES val:33 [ 26.658905] BUG: Bad rss-counter state mm:00000000f2e75329 type:MM_ANONPAGES val:22 [ 27.077816] BUG: Bad rss-counter state mm:00000000a75b6315 type:MM_FILEPAGES val:33 [ 27.078814] BUG: Bad rss-counter state mm:00000000a75b6315 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58426' (ECDSA) to the list of known hosts. 2023/06/21 01:15:00 fuzzer started 2023/06/21 01:15:00 dialing manager at localhost:36067 2023/06/21 01:15:01 checking machine... 2023/06/21 01:15:01 checking revisions... [ 27.822580] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:15:01 testing simple program... [ 27.861649] cgroup: Unknown subsys name 'net' [ 27.899655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:15:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ac6cbc604e98955f RCX=fffffffffffffe80 RDX=417ede905d62ec8c RSI=d42f6b65832c3de6 RDI=00007ffc40bc87f0 RBP=00005648439e7a50 RSP=00007ffc40bc84f8 R8 =f16be0df48df7611 R9 =ecd067401eb526da R10=bd11b7056922b188 R11=ee02db9b98fb1739 R12=6608404660131972 R13=260813beab98748e R14=7ffa3a93b7c57609 R15=2bd0949a7cd3c219 RIP=00007f55b6af735e RFL=00000246 [---Z-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 00007f55b629c900 00000000 00000000 GS =0000 0000000000000000 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=00005648439e8098 CR3=0000000016482000 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=000000000000000000005648439e8cc0 XMM02=000000000000000000005648439e7a50 XMM03=0000000000000000fffffffffffffe80 XMM04=260813beab98748e6608404660131972 XMM05=2bd0949a7cd3c2197ffa3a93b7c57609 XMM06=132f98bfe14ad9250e941f20b72089ee XMM07=79d4c0eca2869575c6043d5f8908e54b XMM08=d886248bcb4d4579806d752c8dbafc7e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000400100 RBX=dffffc0000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888010344af8 RBP=1ffff110028e0f73 RSP=ffff888014707b80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=00000000fffffffc R13=0000000000000000 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0860 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 00007f1c3f7cd900 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=00007f8d5cbc3008 CR3=0000000013a8e000 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=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