[ 29.818245] BUG: Bad rss-counter state mm:00000000641ccaa7 type:MM_FILEPAGES val:33 [ 29.819646] BUG: Bad rss-counter state mm:00000000641ccaa7 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.971685] ================================================================== [ 29.972524] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.973404] Read of size 8 at addr ffff888009d744e0 by task sshd/220 [ 29.974122] [ 29.974323] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.975115] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.976003] Call Trace: [ 29.976313] [ 29.976573] dump_stack_lvl+0x91/0xf0 [ 29.977029] print_report+0xcc/0x620 [ 29.977475] ? __virt_addr_valid+0x102/0x340 [ 29.977992] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.978568] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.979146] kasan_report+0xbe/0xf0 [ 29.979580] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.980162] vma_interval_tree_remove+0xc75/0xec0 [ 29.980710] vma_prepare+0xc54/0x11a0 [ 29.981157] __split_vma+0x5af/0x950 [ 29.981584] ? __pfx___split_vma+0x10/0x10 [ 29.982095] ? find_held_lock+0x2c/0x110 [ 29.982568] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.983087] ? lock_is_held_type+0x9f/0x120 [ 29.983577] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.984138] ? mtree_range_walk+0x632/0x900 [ 29.984642] ? mas_walk+0x5c7/0x7c0 [ 29.985098] do_vmi_munmap+0x1f1/0x2b0 [ 29.985552] mmap_region+0x1f9/0x2660 [ 29.986003] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.986477] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.987139] ? __pfx_lock_acquire+0x10/0x10 [ 29.987625] ? __pfx_mmap_region+0x10/0x10 [ 29.988115] ? security_mmap_addr+0x7d/0xa0 [ 29.988598] ? get_unmapped_area+0x1f5/0x3f0 [ 29.989106] do_mmap+0x854/0xf00 [ 29.989508] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.989975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.990513] ksys_mmap_pgoff+0x3af/0x500 [ 29.990978] do_syscall_64+0x3f/0x90 [ 29.991435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.992037] RIP: 0033:0x7fe95a049d82 [ 29.992458] 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 [ 29.994444] RSP: 002b:00007ffe83cefba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.995345] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe95a049d82 [ 29.996147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe959483000 [ 29.996928] RBP: 00007fe959483000 R08: 0000000000000009 R09: 0000000000001000 [ 29.997729] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c63221ff70 [ 29.998537] R13: 00007ffe83cefbc0 R14: 00007ffe83cefbf0 R15: 00007ffe83ceff50 [ 29.999355] [ 29.999627] [ 29.999824] Allocated by task 213: [ 30.000234] kasan_save_stack+0x22/0x50 [ 30.000706] kasan_set_track+0x25/0x30 [ 30.001177] __kasan_slab_alloc+0x59/0x70 [ 30.001666] kmem_cache_alloc+0x16b/0x370 [ 30.002174] vm_area_dup+0x20/0x160 [ 30.002590] __split_vma+0x170/0x950 [ 30.003030] split_vma+0xc6/0x110 [ 30.003438] mprotect_fixup+0x8d2/0xb30 [ 30.003904] do_mprotect_pkey+0x87e/0xd40 [ 30.004412] __x64_sys_mprotect+0x78/0xc0 [ 30.004906] do_syscall_64+0x3f/0x90 [ 30.005358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.005968] [ 30.006181] Freed by task 203: [ 30.006541] kasan_save_stack+0x22/0x50 [ 30.007014] kasan_set_track+0x25/0x30 [ 30.007475] kasan_save_free_info+0x2b/0x50 [ 30.007969] __kasan_slab_free+0x10a/0x190 [ 30.008478] kmem_cache_free+0x10d/0x4d0 [ 30.008954] rcu_core+0x8c8/0x2860 [ 30.009372] __do_softirq+0x1b7/0x7d4 [ 30.009822] [ 30.010048] Last potentially related work creation: [ 30.010595] kasan_save_stack+0x22/0x50 [ 30.011069] __kasan_record_aux_stack+0x8e/0xa0 [ 30.011604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.012204] remove_vma+0x139/0x170 [ 30.012623] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.013172] do_vmi_munmap+0x1f1/0x2b0 [ 30.013623] __vm_munmap+0x138/0x3a0 [ 30.014085] __x64_sys_munmap+0x59/0x80 [ 30.014557] do_syscall_64+0x3f/0x90 [ 30.014997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.015604] [ 30.015803] Second to last potentially related work creation: [ 30.016441] kasan_save_stack+0x22/0x50 [ 30.016903] __kasan_record_aux_stack+0x8e/0xa0 [ 30.017452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.018065] remove_vma+0x139/0x170 [ 30.018481] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.018996] do_vmi_munmap+0x1f1/0x2b0 [ 30.019455] mmap_region+0x1f9/0x2660 [ 30.019904] do_mmap+0x854/0xf00 [ 30.020309] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.020764] ksys_mmap_pgoff+0x3af/0x500 [ 30.021250] do_syscall_64+0x3f/0x90 [ 30.021689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.022329] [ 30.022531] The buggy address belongs to the object at ffff888009d74488 [ 30.022531] which belongs to the cache vm_area_struct of size 168 [ 30.023912] The buggy address is located 88 bytes inside of [ 30.023912] freed 168-byte region [ffff888009d74488, ffff888009d74530) [ 30.025238] [ 30.025443] The buggy address belongs to the physical page: [ 30.026069] page:0000000089026592 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d74 [ 30.027082] memcg:ffff88800e978b01 [ 30.027475] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.028087] page_type: 0xffffffff() [ 30.028505] raw: 0100000000000200 ffff8880087a0c80 ffffea0000231e80 dead000000000008 [ 30.029365] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e978b01 [ 30.030237] page dumped because: kasan: bad access detected [ 30.030842] [ 30.031086] Memory state around the buggy address: [ 30.031622] ffff888009d74380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.032423] ffff888009d74400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.033220] >ffff888009d74480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.034033] ^ [ 30.034727] ffff888009d74500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.035538] ffff888009d74580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.036334] ================================================================== [ 30.037410] Disabling lock debugging due to kernel taint [ 32.109493] BUG: Bad rss-counter state mm:00000000669f8c0f type:MM_FILEPAGES val:33 [ 32.110682] BUG: Bad rss-counter state mm:00000000669f8c0f type:MM_ANONPAGES val:22 [ 32.480068] BUG: Bad rss-counter state mm:0000000034fdbab7 type:MM_FILEPAGES val:33 [ 32.481326] BUG: Bad rss-counter state mm:0000000034fdbab7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23915' (ECDSA) to the list of known hosts. 2023/06/21 08:51:31 fuzzer started 2023/06/21 08:51:31 dialing manager at localhost:36067 2023/06/21 08:51:31 checking machine... 2023/06/21 08:51:31 checking revisions... [ 33.205094] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:51:31 testing simple program... [ 33.256029] cgroup: Unknown subsys name 'net' [ 33.308254] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:51:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c1353 RSI=ffffffff813782f8 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a70 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801015b680 R15=ffff88806ce09a98 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007f211c95c900 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=00007f211cf11650 CR3=000000000fe26000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110033a9ead RSI=ffff888019d4f9a8 RDI=ffff888019d4f570 RBP=ffff88800ff08000 RSP=ffff888019d4f4b0 R8 =0000000000000001 R9 =ffff888019d4f560 R10=0000000000038001 R11=000000000008b92e R12=ffff888019d4f580 R13=ffff888019d4f568 R14=ffff888019d4f9a8 R15=ffff888019d4f520 RIP=ffffffff81131c60 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 00007fcd3bcef700 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=00007ffdb0071b98 CR3=00000000147a6000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030333a3135 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343231 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000