[ 104.864183] BUG: Bad rss-counter state mm:00000000449ec2ba type:MM_FILEPAGES val:33 [ 104.865240] BUG: Bad rss-counter state mm:00000000449ec2ba type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 105.030287] ================================================================== [ 105.031258] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 105.032229] Read of size 8 at addr ffff88800dd7d880 by task sshd/218 [ 105.033179] [ 105.033404] CPU: 1 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 105.034487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 105.035515] Call Trace: [ 105.035844] <TASK> [ 105.036135] dump_stack_lvl+0x91/0xf0 [ 105.036639] print_report+0xcc/0x620 [ 105.037146] ? __virt_addr_valid+0x102/0x340 [ 105.037711] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.038361] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.039004] kasan_report+0xbe/0xf0 [ 105.039493] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.040127] vma_interval_tree_remove+0xc75/0xec0 [ 105.040755] vma_prepare+0xc54/0x11a0 [ 105.041251] __split_vma+0x5af/0x950 [ 105.041742] ? __pfx___split_vma+0x10/0x10 [ 105.042294] ? find_held_lock+0x2c/0x110 [ 105.042832] do_vmi_align_munmap+0x2ba/0x11f0 [ 105.043419] ? lock_is_held_type+0x9f/0x120 [ 105.043976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 105.044603] ? mtree_range_walk+0x632/0x900 [ 105.045171] ? mas_walk+0x5c7/0x7c0 [ 105.045659] do_vmi_munmap+0x1f1/0x2b0 [ 105.046200] mmap_region+0x1f9/0x2660 [ 105.046703] ? vm_mmap_pgoff+0x15c/0x3a0 [ 105.047236] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 105.047974] ? __pfx_lock_acquire+0x10/0x10 [ 105.048529] ? __pfx_mmap_region+0x10/0x10 [ 105.049078] ? security_mmap_addr+0x7d/0xa0 [ 105.049624] ? get_unmapped_area+0x1f5/0x3f0 [ 105.050206] do_mmap+0x854/0xf00 [ 105.050661] vm_mmap_pgoff+0x1a6/0x3a0 [ 105.051175] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 105.051754] ksys_mmap_pgoff+0x3af/0x500 [ 105.052288] do_syscall_64+0x3f/0x90 [ 105.052781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.053444] RIP: 0033:0x7f0f786f8d82 [ 105.053937] 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 [ 105.056135] RSP: 002b:00007fffc36920e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 105.057075] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f786f8d82 [ 105.057969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f77b32000 [ 105.058839] RBP: 00007f0f77b32000 R08: 0000000000000009 R09: 0000000000001000 [ 105.059716] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a123aeb20 [ 105.060588] R13: 00007fffc3692100 R14: 00007fffc3692130 R15: 00007fffc3692490 [ 105.061482] </TASK> [ 105.061793] [ 105.062015] Allocated by task 211: [ 105.062459] kasan_save_stack+0x22/0x50 [ 105.062982] kasan_set_track+0x25/0x30 [ 105.063493] __kasan_slab_alloc+0x59/0x70 [ 105.064037] kmem_cache_alloc+0x16b/0x370 [ 105.064572] vm_area_dup+0x20/0x160 [ 105.065053] __split_vma+0x170/0x950 [ 105.065541] split_vma+0xc6/0x110 [ 105.066011] mprotect_fixup+0x8d2/0xb30 [ 105.066530] do_mprotect_pkey+0x87e/0xd40 [ 105.067073] __x64_sys_mprotect+0x78/0xc0 [ 105.067610] do_syscall_64+0x3f/0x90 [ 105.068095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.068754] [ 105.068973] Freed by task 211: [ 105.069381] kasan_save_stack+0x22/0x50 [ 105.069905] kasan_set_track+0x25/0x30 [ 105.070425] kasan_save_free_info+0x2b/0x50 [ 105.070974] __kasan_slab_free+0x10a/0x190 [ 105.071529] kmem_cache_free+0x10d/0x4d0 [ 105.072052] rcu_core+0x8c8/0x2860 [ 105.072516] __do_softirq+0x1b7/0x7d4 [ 105.073003] [ 105.073223] Last potentially related work creation: [ 105.073916] kasan_save_stack+0x22/0x50 [ 105.074439] __kasan_record_aux_stack+0x8e/0xa0 [ 105.075035] __call_rcu_common.constprop.0+0x6a/0xb90 [ 105.075709] remove_vma+0x139/0x170 [ 105.076174] do_vmi_align_munmap+0xd4a/0x11f0 [ 105.076753] do_vmi_munmap+0x1f1/0x2b0 [ 105.077252] __vm_munmap+0x138/0x3a0 [ 105.077742] __x64_sys_munmap+0x59/0x80 [ 105.078256] do_syscall_64+0x3f/0x90 [ 105.078746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.079408] [ 105.079631] The buggy address belongs to the object at ffff88800dd7d828 [ 105.079631] which belongs to the cache vm_area_struct of size 168 [ 105.081154] The buggy address is located 88 bytes inside of [ 105.081154] freed 168-byte region [ffff88800dd7d828, ffff88800dd7d8d0) [ 105.082613] [ 105.082838] The buggy address belongs to the physical page: [ 105.083515] page:000000007b87b840 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd7d [ 105.084629] memcg:ffff88800ef38801 [ 105.085073] flags: 0x100000000000200(slab|node=0|zone=1) [ 105.085759] page_type: 0xffffffff() [ 105.086231] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 105.087181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef38801 [ 105.088119] page dumped because: kasan: bad access detected [ 105.088802] [ 105.089021] Memory state around the buggy address: [ 105.089631] ffff88800dd7d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 105.090533] ffff88800dd7d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 105.091418] >ffff88800dd7d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 105.092301] ^ [ 105.092722] ffff88800dd7d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 105.093615] ffff88800dd7d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 105.094510] ================================================================== [ 105.095534] Disabling lock debugging due to kernel taint [ 107.130740] BUG: Bad rss-counter state mm:000000003d8e9740 type:MM_FILEPAGES val:33 [ 107.132066] BUG: Bad rss-counter state mm:000000003d8e9740 type:MM_ANONPAGES val:22 [ 107.568914] BUG: Bad rss-counter state mm:00000000f2bda358 type:MM_FILEPAGES val:33 [ 107.569674] BUG: Bad rss-counter state mm:00000000f2bda358 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47506' (ECDSA) to the list of known hosts. 2023/06/19 13:14:07 fuzzer started 2023/06/19 13:14:08 dialing manager at localhost:44161 2023/06/19 13:14:08 checking machine... 2023/06/19 13:14:08 checking revisions... [ 108.275630] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:14:08 testing simple program... [ 108.327661] cgroup: Unknown subsys name 'net' [ 108.368516] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:12:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015f8b680 RSI=ffffffff8186c18e RDI=ffff888015f8c000 RBP=ffff88800f302780 RSP=ffff888016b37dd8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000003 R13=ffff88800f3027d0 R14=ffff888018dbdcc0 R15=ffff88800f302900 RIP=ffffffff814c081b 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 00007f2ace3f1900 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=00007ffdab947000 CR3=000000000ea56000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2968e8d280 CR3=000000000ca50000 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=86f2c351fd4ab4af88495f7c671cda7a XMM02=0000000000127200ec2efd57dc4c00df XMM03=000000000012d4f0b245c5e2fb9500a4 XMM04=956d1c660003390900000000000ae988 XMM05=751b9502027dc0b9000000000013cee0 XMM06=e73fb8b1e09b146e000000000013bde8 XMM07=e042d86d42eb936e000000000012d770 XMM08=b245c5e2fb9500a40000000000127260 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000