[ 31.175978] BUG: Bad rss-counter state mm:0000000074d6ca69 type:MM_FILEPAGES val:33 [ 31.177489] BUG: Bad rss-counter state mm:0000000074d6ca69 type:MM_ANONPAGES val:22 [ 31.327067] ================================================================== [ 31.328003] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.328975] Read of size 8 at addr ffff8880194c5d08 by task sshd/219 [ 31.329895] [ 31.330128] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.331073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.332055] Call Trace: [ 31.332384] [ 31.332674] dump_stack_lvl+0x91/0xf0 [ 31.333184] print_report+0xcc/0x620 [ 31.333682] ? __virt_addr_valid+0x102/0x340 [ 31.334288] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.334922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.335551] kasan_report+0xbe/0xf0 [ 31.336043] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336679] vma_interval_tree_remove+0xc75/0xec0 [ 31.337302] vma_prepare+0xc54/0x11a0 [ 31.337802] __split_vma+0x5af/0x950 [ 31.338293] ? __pfx___split_vma+0x10/0x10 [ 31.338846] ? find_held_lock+0x2c/0x110 [ 31.339380] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.339963] ? lock_is_held_type+0x9f/0x120 [ 31.340524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.341160] ? mtree_range_walk+0x632/0x900 [ 31.341742] ? mas_walk+0x5c7/0x7c0 [ 31.342249] do_vmi_munmap+0x1f1/0x2b0 [ 31.342766] mmap_region+0x1f9/0x2660 [ 31.343271] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.343812] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.344566] ? __pfx_lock_acquire+0x10/0x10 [ 31.345127] ? __pfx_mmap_region+0x10/0x10 [ 31.345677] ? security_mmap_addr+0x7d/0xa0 [ 31.346268] ? get_unmapped_area+0x1f5/0x3f0 [ 31.346842] do_mmap+0x854/0xf00 [ 31.347300] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.347825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.348406] ksys_mmap_pgoff+0x3af/0x500 [ 31.348928] do_syscall_64+0x3f/0x90 [ 31.349424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350105] RIP: 0033:0x7ff73507cd82 [ 31.350572] 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 [ 31.352788] RSP: 002b:00007ffc39d90908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.353748] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff73507cd82 [ 31.354654] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7344b6000 [ 31.355543] RBP: 00007ff7344b6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.356434] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562727f96b20 [ 31.357328] R13: 00007ffc39d90920 R14: 00007ffc39d90950 R15: 00007ffc39d90cb0 [ 31.358229] [ 31.358538] [ 31.358763] Allocated by task 212: [ 31.359208] kasan_save_stack+0x22/0x50 [ 31.359730] kasan_set_track+0x25/0x30 [ 31.360238] __kasan_slab_alloc+0x59/0x70 [ 31.360796] kmem_cache_alloc+0x16b/0x370 [ 31.361334] vm_area_dup+0x20/0x160 [ 31.361809] __split_vma+0x170/0x950 [ 31.362314] split_vma+0xc6/0x110 [ 31.362763] mprotect_fixup+0x8d2/0xb30 [ 31.363289] do_mprotect_pkey+0x87e/0xd40 [ 31.363843] __x64_sys_mprotect+0x78/0xc0 [ 31.364389] do_syscall_64+0x3f/0x90 [ 31.364887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.365557] [ 31.365783] Freed by task 212: [ 31.366201] kasan_save_stack+0x22/0x50 [ 31.366727] kasan_set_track+0x25/0x30 [ 31.367243] kasan_save_free_info+0x2b/0x50 [ 31.367799] __kasan_slab_free+0x10a/0x190 [ 31.368356] kmem_cache_free+0x10d/0x4d0 [ 31.368884] rcu_core+0x8c8/0x2860 [ 31.369344] __do_softirq+0x1b7/0x7d4 [ 31.369838] [ 31.370071] Last potentially related work creation: [ 31.370681] kasan_save_stack+0x22/0x50 [ 31.371259] __kasan_record_aux_stack+0x8e/0xa0 [ 31.371857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.372529] remove_vma+0x139/0x170 [ 31.372994] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.373571] do_vmi_munmap+0x1f1/0x2b0 [ 31.374084] __vm_munmap+0x138/0x3a0 [ 31.374568] __x64_sys_munmap+0x59/0x80 [ 31.375088] do_syscall_64+0x3f/0x90 [ 31.375580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.376259] [ 31.376483] The buggy address belongs to the object at ffff8880194c5cb0 [ 31.376483] which belongs to the cache vm_area_struct of size 168 [ 31.378035] The buggy address is located 88 bytes inside of [ 31.378035] freed 168-byte region [ffff8880194c5cb0, ffff8880194c5d58) [ 31.379516] [ 31.379744] The buggy address belongs to the physical page: [ 31.380433] page:000000002e4d9bb5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x194c5 [ 31.381589] memcg:ffff8880195a1201 [ 31.382054] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.382740] page_type: 0xffffffff() [ 31.383218] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.384187] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880195a1201 [ 31.385151] page dumped because: kasan: bad access detected [ 31.385849] [ 31.386079] Memory state around the buggy address: [ 31.386682] ffff8880194c5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.387584] ffff8880194c5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.388480] >ffff8880194c5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.389370] ^ [ 31.389832] ffff8880194c5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.390738] ffff8880194c5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.391624] ================================================================== [ 31.392577] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.165203] BUG: Bad rss-counter state mm:00000000758f5ab7 type:MM_FILEPAGES val:33 [ 34.166445] BUG: Bad rss-counter state mm:00000000758f5ab7 type:MM_ANONPAGES val:22 [ 34.545036] BUG: Bad rss-counter state mm:00000000790cab7a type:MM_FILEPAGES val:33 [ 34.546223] BUG: Bad rss-counter state mm:00000000790cab7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62912' (ECDSA) to the list of known hosts. 2023/06/20 16:28:11 fuzzer started 2023/06/20 16:28:11 dialing manager at localhost:36067 2023/06/20 16:28:11 checking machine... 2023/06/20 16:28:11 checking revisions... [ 35.342209] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:28:12 testing simple program... [ 35.396507] cgroup: Unknown subsys name 'net' [ 35.465080] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:28:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880165b3680 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015e776b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000024 RIP=ffffffff813744b4 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 00007ff1ffd3a900 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=00007ffdf57a1000 CR3=000000001ca82000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f10103b4280 CR3=0000000016aa4000 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=2031313a38323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a38323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000