[ 31.332644] BUG: Bad rss-counter state mm:00000000bcd08b99 type:MM_FILEPAGES val:33 [ 31.334013] BUG: Bad rss-counter state mm:00000000bcd08b99 type:MM_ANONPAGES val:22 [ 31.492821] ================================================================== [ 31.493879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.494850] Read of size 8 at addr ffff88801002eed8 by task sshd/221 [ 31.495835] [ 31.496066] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.496953] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.497955] Call Trace: [ 31.498277] [ 31.498568] dump_stack_lvl+0x91/0xf0 [ 31.499081] print_report+0xcc/0x620 [ 31.499576] ? __virt_addr_valid+0x102/0x340 [ 31.500149] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.500783] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.501426] kasan_report+0xbe/0xf0 [ 31.501914] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.502549] vma_interval_tree_remove+0xc75/0xec0 [ 31.503165] vma_prepare+0xc54/0x11a0 [ 31.503668] __split_vma+0x5af/0x950 [ 31.504145] ? __pfx___split_vma+0x10/0x10 [ 31.504692] ? find_held_lock+0x2c/0x110 [ 31.505238] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.505813] ? lock_is_held_type+0x9f/0x120 [ 31.506356] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.506977] ? mtree_range_walk+0x632/0x900 [ 31.507534] ? mas_walk+0x5c7/0x7c0 [ 31.508030] do_vmi_munmap+0x1f1/0x2b0 [ 31.508522] mmap_region+0x1f9/0x2660 [ 31.509002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.509530] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.510255] ? __pfx_lock_acquire+0x10/0x10 [ 31.510794] ? __pfx_mmap_region+0x10/0x10 [ 31.511327] ? security_mmap_addr+0x7d/0xa0 [ 31.511860] ? get_unmapped_area+0x1f5/0x3f0 [ 31.512414] do_mmap+0x854/0xf00 [ 31.512866] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.513373] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.513948] ksys_mmap_pgoff+0x3af/0x500 [ 31.514456] do_syscall_64+0x3f/0x90 [ 31.514969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.515638] RIP: 0033:0x7f53c867bd82 [ 31.516098] 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 [ 31.518263] RSP: 002b:00007ffd3fdcd4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.519176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53c867bd82 [ 31.520024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53c7ab5000 [ 31.520887] RBP: 00007f53c7ab5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.521759] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564e3371f70 [ 31.522624] R13: 00007ffd3fdcd500 R14: 00007ffd3fdcd530 R15: 00007ffd3fdcd890 [ 31.523485] [ 31.523778] [ 31.523993] Allocated by task 213: [ 31.524421] kasan_save_stack+0x22/0x50 [ 31.524930] kasan_set_track+0x25/0x30 [ 31.525448] __kasan_slab_alloc+0x59/0x70 [ 31.525978] kmem_cache_alloc+0x16b/0x370 [ 31.526498] vm_area_dup+0x20/0x160 [ 31.526954] __split_vma+0x170/0x950 [ 31.527421] split_vma+0xc6/0x110 [ 31.527862] mprotect_fixup+0x8d2/0xb30 [ 31.528368] do_mprotect_pkey+0x87e/0xd40 [ 31.528891] __x64_sys_mprotect+0x78/0xc0 [ 31.529410] do_syscall_64+0x3f/0x90 [ 31.529890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.530527] [ 31.530744] Freed by task 205: [ 31.531132] kasan_save_stack+0x22/0x50 [ 31.531632] kasan_set_track+0x25/0x30 [ 31.532126] kasan_save_free_info+0x2b/0x50 [ 31.532659] __kasan_slab_free+0x10a/0x190 [ 31.533200] kmem_cache_free+0x10d/0x4d0 [ 31.533709] rcu_core+0x8c8/0x2860 [ 31.534154] __do_softirq+0x1b7/0x7d4 [ 31.534631] [ 31.534843] Last potentially related work creation: [ 31.535432] kasan_save_stack+0x22/0x50 [ 31.535933] __kasan_record_aux_stack+0x8e/0xa0 [ 31.536501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.537229] remove_vma+0x139/0x170 [ 31.537701] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.538293] do_vmi_munmap+0x1f1/0x2b0 [ 31.538781] __vm_munmap+0x138/0x3a0 [ 31.539254] __x64_sys_munmap+0x59/0x80 [ 31.539756] do_syscall_64+0x3f/0x90 [ 31.540234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.540905] [ 31.541138] Second to last potentially related work creation: [ 31.541846] kasan_save_stack+0x22/0x50 [ 31.542373] __kasan_record_aux_stack+0x8e/0xa0 [ 31.542976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.543629] remove_vma+0x139/0x170 [ 31.544086] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.544647] do_vmi_munmap+0x1f1/0x2b0 [ 31.545148] mmap_region+0x1f9/0x2660 [ 31.545619] do_mmap+0x854/0xf00 [ 31.546053] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.546541] ksys_mmap_pgoff+0x3af/0x500 [ 31.547044] do_syscall_64+0x3f/0x90 [ 31.547517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.548156] [ 31.548372] The buggy address belongs to the object at ffff88801002ee80 [ 31.548372] which belongs to the cache vm_area_struct of size 168 [ 31.549852] The buggy address is located 88 bytes inside of [ 31.549852] freed 168-byte region [ffff88801002ee80, ffff88801002ef28) [ 31.551256] [ 31.551469] The buggy address belongs to the physical page: [ 31.552128] page:0000000049a51db5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1002e [ 31.553223] memcg:ffff88800cf8ba01 [ 31.553652] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.554351] page_type: 0xffffffff() [ 31.554806] raw: 0100000000000200 ffff8880087a0c80 ffffea0000382c80 dead000000000007 [ 31.555726] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf8ba01 [ 31.556625] page dumped because: kasan: bad access detected [ 31.557308] [ 31.557522] Memory state around the buggy address: [ 31.558102] ffff88801002ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.558950] ffff88801002ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.559808] >ffff88801002ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.560649] ^ [ 31.561387] ffff88801002ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.562227] ffff88801002ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.563070] ================================================================== [ 31.563999] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.449547] BUG: Bad rss-counter state mm:000000000a12c8c8 type:MM_FILEPAGES val:33 [ 34.450754] BUG: Bad rss-counter state mm:000000000a12c8c8 type:MM_ANONPAGES val:22 [ 34.856153] BUG: Bad rss-counter state mm:00000000d3add962 type:MM_FILEPAGES val:33 [ 34.857742] BUG: Bad rss-counter state mm:00000000d3add962 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27629' (ECDSA) to the list of known hosts. 2023/06/21 02:23:40 fuzzer started 2023/06/21 02:23:41 dialing manager at localhost:36067 2023/06/21 02:23:41 checking machine... 2023/06/21 02:23:41 checking revisions... [ 35.608123] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:23:41 testing simple program... [ 35.650836] cgroup: Unknown subsys name 'net' [ 35.709450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:23:40 Registers: info registers vcpu 0 RAX=ffff88806ce39500 RBX=ffff88800ff8b700 RCX=0000000000000000 RDX=1ffff11001ff16f0 RSI=00000000000003ba RDI=ffff88806ce3a100 RBP=dffffc0000000000 RSP=ffff88801650fc70 R8 =0000000000009800 R9 =ffff88806ce3965c R10=0000000000000000 R11=0000000000000001 R12=ffff88806ce39730 R13=0000000000000000 R14=ffff88800ff8b680 R15=ffff88806ce395c0 RIP=ffffffff813bdd44 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff573fff700 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=00007f4717a65618 CR3=000000000d6ec000 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=2030343a33323a3230203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33323a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff860ae4d2 RDX=0000000000000008 RSI=ffff888008e37f50 RDI=ffff888008e37950 RBP=ffff888008e379a8 RSP=ffff888008e378d8 R8 =ffffffff860ae4d6 R9 =ffff888008e37990 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008e379b0 R13=ffff888008e37998 R14=ffff888008e37f58 R15=ffff888008e37950 RIP=ffffffff811303f0 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 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=00007fdfd834d2d0 CR3=000000000d824000 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=19375c2142b59cab3c4afd7bd3141844 XMM02=2c67c8bc2e329bc3000000000011b470 XMM03=fb795ef6d65770560000000000121e30 XMM04=292c53ad09bf43cb00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132da0 XMM06=c291bd5c70af25b90000000000132c28 XMM07=e042d86d42eb936e0000000000122108 XMM08=b88e5346b29dfea1000000000011b4d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000