[ 23.952892] BUG: Bad rss-counter state mm:00000000b1acbf50 type:MM_FILEPAGES val:33 [ 23.954716] BUG: Bad rss-counter state mm:00000000b1acbf50 type:MM_ANONPAGES val:22 [ 24.091659] ================================================================== [ 24.092735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.093870] Read of size 8 at addr ffff888019d9a968 by task sshd/221 [ 24.094775] [ 24.095002] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.095873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.096869] Call Trace: [ 24.097196] [ 24.097482] dump_stack_lvl+0x91/0xf0 [ 24.097988] print_report+0xcc/0x620 [ 24.098476] ? __virt_addr_valid+0x102/0x340 [ 24.099031] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.099647] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.100267] kasan_report+0xbe/0xf0 [ 24.100747] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101369] vma_interval_tree_remove+0xc75/0xec0 [ 24.101993] vma_prepare+0xc54/0x11a0 [ 24.102473] __split_vma+0x5af/0x950 [ 24.102952] ? __pfx___split_vma+0x10/0x10 [ 24.103485] ? find_held_lock+0x2c/0x110 [ 24.104011] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.104577] ? lock_is_held_type+0x9f/0x120 [ 24.105123] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.105757] ? mtree_range_walk+0x632/0x900 [ 24.106317] ? mas_walk+0x5c7/0x7c0 [ 24.106800] do_vmi_munmap+0x1f1/0x2b0 [ 24.107294] mmap_region+0x1f9/0x2660 [ 24.107786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.108303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.109014] ? __pfx_lock_acquire+0x10/0x10 [ 24.109555] ? __pfx_mmap_region+0x10/0x10 [ 24.110086] ? security_mmap_addr+0x7d/0xa0 [ 24.110617] ? get_unmapped_area+0x1f5/0x3f0 [ 24.111177] do_mmap+0x854/0xf00 [ 24.111618] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.112116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.112678] ksys_mmap_pgoff+0x3af/0x500 [ 24.113189] do_syscall_64+0x3f/0x90 [ 24.113689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.114349] RIP: 0033:0x7fb6e71a4d82 [ 24.114814] 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 [ 24.116977] RSP: 002b:00007ffda8800888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.117895] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6e71a4d82 [ 24.118755] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6e65de000 [ 24.119612] RBP: 00007fb6e65de000 R08: 0000000000000009 R09: 0000000000001000 [ 24.120458] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8f9248ec0 [ 24.121319] R13: 00007ffda88008a0 R14: 00007ffda88008d0 R15: 00007ffda8800c30 [ 24.122207] [ 24.122504] [ 24.122720] Allocated by task 205: [ 24.123154] kasan_save_stack+0x22/0x50 [ 24.123663] kasan_set_track+0x25/0x30 [ 24.124162] __kasan_slab_alloc+0x59/0x70 [ 24.124690] kmem_cache_alloc+0x16b/0x370 [ 24.125212] vm_area_dup+0x20/0x160 [ 24.125675] __split_vma+0x170/0x950 [ 24.126139] split_vma+0xc6/0x110 [ 24.126586] mprotect_fixup+0x8d2/0xb30 [ 24.127093] do_mprotect_pkey+0x87e/0xd40 [ 24.127623] __x64_sys_mprotect+0x78/0xc0 [ 24.128150] do_syscall_64+0x3f/0x90 [ 24.128628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.129282] [ 24.129503] Freed by task 205: [ 24.129920] kasan_save_stack+0x22/0x50 [ 24.130429] kasan_set_track+0x25/0x30 [ 24.130928] kasan_save_free_info+0x2b/0x50 [ 24.131468] __kasan_slab_free+0x10a/0x190 [ 24.132006] kmem_cache_free+0x10d/0x4d0 [ 24.132517] rcu_core+0x8c8/0x2860 [ 24.132962] __do_softirq+0x1b7/0x7d4 [ 24.133449] [ 24.133678] Last potentially related work creation: [ 24.134269] kasan_save_stack+0x22/0x50 [ 24.134781] __kasan_record_aux_stack+0x8e/0xa0 [ 24.135363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.136003] remove_vma+0x139/0x170 [ 24.136451] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.137019] do_vmi_munmap+0x1f1/0x2b0 [ 24.137510] __vm_munmap+0x138/0x3a0 [ 24.137996] __x64_sys_munmap+0x59/0x80 [ 24.138507] do_syscall_64+0x3f/0x90 [ 24.138984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.139630] [ 24.139848] The buggy address belongs to the object at ffff888019d9a910 [ 24.139848] which belongs to the cache vm_area_struct of size 168 [ 24.141330] The buggy address is located 88 bytes inside of [ 24.141330] freed 168-byte region [ffff888019d9a910, ffff888019d9a9b8) [ 24.142749] [ 24.142966] The buggy address belongs to the physical page: [ 24.143632] page:00000000bb828c72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d9a [ 24.144749] memcg:ffff888019d9b001 [ 24.145177] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.145834] page_type: 0xffffffff() [ 24.146298] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.147246] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d9b001 [ 24.148164] page dumped because: kasan: bad access detected [ 24.148834] [ 24.149051] Memory state around the buggy address: [ 24.149651] ffff888019d9a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.150515] ffff888019d9a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.151381] >ffff888019d9a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.152245] ^ [ 24.153043] ffff888019d9a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.153915] ffff888019d9aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.154776] ================================================================== [ 24.155885] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.649281] BUG: Bad rss-counter state mm:00000000d760ef18 type:MM_FILEPAGES val:33 [ 25.650108] BUG: Bad rss-counter state mm:00000000d760ef18 type:MM_ANONPAGES val:22 [ 26.069919] BUG: Bad rss-counter state mm:00000000940d2ff6 type:MM_FILEPAGES val:33 [ 26.070613] BUG: Bad rss-counter state mm:00000000940d2ff6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6765' (ECDSA) to the list of known hosts. 2023/06/20 22:44:16 fuzzer started 2023/06/20 22:44:16 dialing manager at localhost:36067 2023/06/20 22:44:16 checking machine... 2023/06/20 22:44:16 checking revisions... [ 26.795894] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:44:17 testing simple program... [ 26.841354] cgroup: Unknown subsys name 'net' [ 26.879194] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:44:16 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800fb67e60 RSI=ffff88800fb67e28 RDI=ffff88800fb679e8 RBP=ffff88800fb67a80 RSP=ffff88800fb679e0 R8 =0000000000000001 R9 =ffff88800fb67a28 R10=0000000000038001 R11=00000000000229a3 R12=ffff88800fb67ab0 R13=0000000000000000 R14=ffff888019d251c0 R15=ffff8880198d4808 RIP=ffffffff81130340 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 00007f42b12ef900 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=00007f42b18a4650 CR3=0000000016410000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007f3035a7e000 CR3=0000000013f5c000 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=c2c01238e91b738e43462b67449c9960 XMM02=0000000000119808ec2efd57dc4c00df XMM03=000000000011f5585e527d68a4bf64b0 XMM04=f6ae2c64f5b58bff00000000000ae988 XMM05=dfcdbad4f1609c370000000000130608 XMM06=806171799158d9670000000000130490 XMM07=e042d86d42eb936e000000000011f7d8 XMM08=5e527d68a4bf64b00000000000119868 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000