[ 30.880835] BUG: Bad rss-counter state mm:000000004cd3260a type:MM_FILEPAGES val:33 [ 30.881866] BUG: Bad rss-counter state mm:000000004cd3260a type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.043846] ================================================================== [ 31.044740] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.045692] Read of size 8 at addr ffff8880143f9310 by task sshd/220 [ 31.046468] [ 31.046687] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.047645] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.048621] Call Trace: [ 31.048973] [ 31.049264] dump_stack_lvl+0x91/0xf0 [ 31.049754] print_report+0xcc/0x620 [ 31.050235] ? __virt_addr_valid+0x102/0x340 [ 31.050784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.051393] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.051997] kasan_report+0xbe/0xf0 [ 31.052470] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053086] vma_interval_tree_remove+0xc75/0xec0 [ 31.053683] vma_prepare+0xc54/0x11a0 [ 31.054156] __split_vma+0x5af/0x950 [ 31.054628] ? __pfx___split_vma+0x10/0x10 [ 31.055159] ? find_held_lock+0x2c/0x110 [ 31.055681] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.056247] ? lock_is_held_type+0x9f/0x120 [ 31.056792] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.057402] ? mtree_range_walk+0x632/0x900 [ 31.057953] ? mas_walk+0x5c7/0x7c0 [ 31.058430] do_vmi_munmap+0x1f1/0x2b0 [ 31.058922] mmap_region+0x1f9/0x2660 [ 31.059404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.059916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.060627] ? __pfx_lock_acquire+0x10/0x10 [ 31.061183] ? __pfx_mmap_region+0x10/0x10 [ 31.061707] ? security_mmap_addr+0x7d/0xa0 [ 31.062229] ? get_unmapped_area+0x1f5/0x3f0 [ 31.062778] do_mmap+0x854/0xf00 [ 31.063214] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.063704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.064269] ksys_mmap_pgoff+0x3af/0x500 [ 31.064773] do_syscall_64+0x3f/0x90 [ 31.065256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.065917] RIP: 0033:0x7fcffeb78d82 [ 31.066371] 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 [ 31.068478] RSP: 002b:00007ffc96a02e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.069405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcffeb78d82 [ 31.070250] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcffdfb2000 [ 31.071094] RBP: 00007fcffdfb2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.071938] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637b9e30ec0 [ 31.072794] R13: 00007ffc96a02e80 R14: 00007ffc96a02eb0 R15: 00007ffc96a03210 [ 31.073647] [ 31.073940] [ 31.074154] Allocated by task 213: [ 31.074581] kasan_save_stack+0x22/0x50 [ 31.075084] kasan_set_track+0x25/0x30 [ 31.075573] __kasan_slab_alloc+0x59/0x70 [ 31.076095] kmem_cache_alloc+0x16b/0x370 [ 31.076607] vm_area_dup+0x20/0x160 [ 31.077065] __split_vma+0x170/0x950 [ 31.077529] split_vma+0xc6/0x110 [ 31.077965] mprotect_fixup+0x8d2/0xb30 [ 31.078465] do_mprotect_pkey+0x87e/0xd40 [ 31.078986] __x64_sys_mprotect+0x78/0xc0 [ 31.079498] do_syscall_64+0x3f/0x90 [ 31.079971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.080612] [ 31.080849] Freed by task 203: [ 31.081244] kasan_save_stack+0x22/0x50 [ 31.081748] kasan_set_track+0x25/0x30 [ 31.082237] kasan_save_free_info+0x2b/0x50 [ 31.082775] __kasan_slab_free+0x10a/0x190 [ 31.083311] kmem_cache_free+0x10d/0x4d0 [ 31.083825] rcu_core+0x8c8/0x2860 [ 31.084269] __do_softirq+0x1b7/0x7d4 [ 31.084757] [ 31.084984] Last potentially related work creation: [ 31.085566] kasan_save_stack+0x22/0x50 [ 31.086066] __kasan_record_aux_stack+0x8e/0xa0 [ 31.086631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.087270] remove_vma+0x139/0x170 [ 31.087722] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.088280] do_vmi_munmap+0x1f1/0x2b0 [ 31.088767] __vm_munmap+0x138/0x3a0 [ 31.089263] __x64_sys_munmap+0x59/0x80 [ 31.089758] do_syscall_64+0x3f/0x90 [ 31.090234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.090877] [ 31.091100] The buggy address belongs to the object at ffff8880143f92b8 [ 31.091100] which belongs to the cache vm_area_struct of size 168 [ 31.092592] The buggy address is located 88 bytes inside of [ 31.092592] freed 168-byte region [ffff8880143f92b8, ffff8880143f9360) [ 31.093996] [ 31.094211] The buggy address belongs to the physical page: [ 31.094877] page:00000000ca0ad9c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x143f9 [ 31.095969] memcg:ffff88800dcd7c01 [ 31.096395] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.097117] page_type: 0xffffffff() [ 31.097565] raw: 0100000000000200 ffff8880087a0c80 ffffea000056ae40 dead000000000007 [ 31.098491] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcd7c01 [ 31.099400] page dumped because: kasan: bad access detected [ 31.100052] [ 31.100272] Memory state around the buggy address: [ 31.100860] ffff8880143f9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.101724] ffff8880143f9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.102588] >ffff8880143f9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.103426] ^ [ 31.103887] ffff8880143f9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.104741] ffff8880143f9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.105602] ================================================================== [ 31.106571] Disabling lock debugging due to kernel taint [ 32.930369] BUG: Bad rss-counter state mm:0000000052cbaacc type:MM_FILEPAGES val:33 [ 32.931578] BUG: Bad rss-counter state mm:0000000052cbaacc type:MM_ANONPAGES val:22 [ 33.311476] BUG: Bad rss-counter state mm:000000007a316c58 type:MM_FILEPAGES val:33 [ 33.312498] BUG: Bad rss-counter state mm:000000007a316c58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64094' (ECDSA) to the list of known hosts. 2023/06/20 14:29:29 fuzzer started 2023/06/20 14:29:30 dialing manager at localhost:36067 2023/06/20 14:29:30 checking machine... 2023/06/20 14:29:30 checking revisions... [ 34.053312] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:29:30 testing simple program... [ 34.104908] cgroup: Unknown subsys name 'net' [ 34.143951] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:29:29 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888019417958 RCX=0000000000000001 RDX=1ffff11003282f36 RSI=ffff888019417db0 RDI=ffffffff8186c183 RBP=ffff8880194179b0 RSP=ffff888019417938 R8 =0000000000000001 R9 =ffff888019417998 R10=0000000000038001 R11=0000000000024253 R12=ffff888019417a20 R13=0000000000000000 R14=ffff8880166e1b40 R15=ffff888018d7d500 RIP=ffffffff811fc8a2 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 00007fbd6c6bc900 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=00007ffeef299000 CR3=000000000f558000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=ffff888008c04400 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=00007fee8d953050 CR3=000000000c74e000 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=2039323a39323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a39323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000