[ 33.705395] BUG: Bad rss-counter state mm:000000004724773d type:MM_FILEPAGES val:33 [ 33.706513] BUG: Bad rss-counter state mm:000000004724773d type:MM_ANONPAGES val:22 [ 33.883277] ================================================================== [ 33.884289] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.885366] Read of size 8 at addr ffff88801bc2edf0 by task sshd/221 [ 33.886132] [ 33.886353] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.887224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.888300] Call Trace: [ 33.888643] [ 33.888940] dump_stack_lvl+0x91/0xf0 [ 33.889436] print_report+0xcc/0x620 [ 33.889927] ? __virt_addr_valid+0x102/0x340 [ 33.890482] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.891100] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.891756] kasan_report+0xbe/0xf0 [ 33.892246] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.892897] vma_interval_tree_remove+0xc75/0xec0 [ 33.893529] vma_prepare+0xc54/0x11a0 [ 33.894024] __split_vma+0x5af/0x950 [ 33.894525] ? __pfx___split_vma+0x10/0x10 [ 33.895077] ? find_held_lock+0x2c/0x110 [ 33.895639] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.896231] ? lock_is_held_type+0x9f/0x120 [ 33.896797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.897435] ? mtree_range_walk+0x632/0x900 [ 33.898008] ? mas_walk+0x5c7/0x7c0 [ 33.898506] do_vmi_munmap+0x1f1/0x2b0 [ 33.899016] mmap_region+0x1f9/0x2660 [ 33.899546] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.900073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.900833] ? __pfx_lock_acquire+0x10/0x10 [ 33.901388] ? __pfx_mmap_region+0x10/0x10 [ 33.901952] ? security_mmap_addr+0x7d/0xa0 [ 33.902532] ? get_unmapped_area+0x1f5/0x3f0 [ 33.903114] do_mmap+0x854/0xf00 [ 33.903596] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.904132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.904738] ksys_mmap_pgoff+0x3af/0x500 [ 33.905290] do_syscall_64+0x3f/0x90 [ 33.905815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.906511] RIP: 0033:0x7f684c27cd82 [ 33.907004] 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 [ 33.909303] RSP: 002b:00007ffe224e7ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.910264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f684c27cd82 [ 33.911170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f684b6b6000 [ 33.912077] RBP: 00007f684b6b6000 R08: 0000000000000009 R09: 0000000000001000 [ 33.912990] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b24db74b20 [ 33.913896] R13: 00007ffe224e8010 R14: 00007ffe224e8040 R15: 00007ffe224e83a0 [ 33.914807] [ 33.915121] [ 33.915354] Allocated by task 213: [ 33.915810] kasan_save_stack+0x22/0x50 [ 33.916344] kasan_set_track+0x25/0x30 [ 33.916875] __kasan_slab_alloc+0x59/0x70 [ 33.917428] kmem_cache_alloc+0x16b/0x370 [ 33.917974] vm_area_dup+0x20/0x160 [ 33.918461] __split_vma+0x170/0x950 [ 33.918970] split_vma+0xc6/0x110 [ 33.919469] mprotect_fixup+0x8d2/0xb30 [ 33.920020] do_mprotect_pkey+0x87e/0xd40 [ 33.920589] __x64_sys_mprotect+0x78/0xc0 [ 33.921158] do_syscall_64+0x3f/0x90 [ 33.921675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.922379] [ 33.922615] Freed by task 205: [ 33.923042] kasan_save_stack+0x22/0x50 [ 33.923608] kasan_set_track+0x25/0x30 [ 33.924158] kasan_save_free_info+0x2b/0x50 [ 33.924747] __kasan_slab_free+0x10a/0x190 [ 33.925340] kmem_cache_free+0x10d/0x4d0 [ 33.925905] rcu_core+0x8c8/0x2860 [ 33.926395] __do_softirq+0x1b7/0x7d4 [ 33.926918] [ 33.927155] Last potentially related work creation: [ 33.927841] kasan_save_stack+0x22/0x50 [ 33.928399] __kasan_record_aux_stack+0x8e/0xa0 [ 33.929031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.929736] remove_vma+0x139/0x170 [ 33.930235] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.930849] do_vmi_munmap+0x1f1/0x2b0 [ 33.931388] __vm_munmap+0x138/0x3a0 [ 33.931901] __x64_sys_munmap+0x59/0x80 [ 33.932445] do_syscall_64+0x3f/0x90 [ 33.932971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.933672] [ 33.933908] The buggy address belongs to the object at ffff88801bc2ed98 [ 33.933908] which belongs to the cache vm_area_struct of size 168 [ 33.935545] The buggy address is located 88 bytes inside of [ 33.935545] freed 168-byte region [ffff88801bc2ed98, ffff88801bc2ee40) [ 33.937090] [ 33.937327] The buggy address belongs to the physical page: [ 33.938052] page:00000000547df29f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc2e [ 33.939250] memcg:ffff88801a7cf501 [ 33.939738] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.940448] page_type: 0xffffffff() [ 33.940940] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.941956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a7cf501 [ 33.942955] page dumped because: kasan: bad access detected [ 33.943689] [ 33.943924] Memory state around the buggy address: [ 33.944560] ffff88801bc2ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.945502] ffff88801bc2ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.946444] >ffff88801bc2ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.947385] ^ [ 33.948275] ffff88801bc2ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.949213] ffff88801bc2ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.950148] ================================================================== [ 33.951268] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.940129] BUG: Bad rss-counter state mm:00000000762e3520 type:MM_FILEPAGES val:33 [ 35.941196] BUG: Bad rss-counter state mm:00000000762e3520 type:MM_ANONPAGES val:22 [ 36.388106] BUG: Bad rss-counter state mm:000000006f568c39 type:MM_FILEPAGES val:33 [ 36.389116] BUG: Bad rss-counter state mm:000000006f568c39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10144' (ECDSA) to the list of known hosts. 2023/06/19 14:10:08 fuzzer started 2023/06/19 14:10:08 dialing manager at localhost:44161 2023/06/19 14:10:08 checking machine... 2023/06/19 14:10:08 checking revisions... [ 37.046872] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:10:08 testing simple program... [ 37.101831] cgroup: Unknown subsys name 'net' [ 37.140001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:10:06 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=00000000e361d838 RCX=ffff88806c4ec1c0 RDX=000000000000000e RSI=ffffffff818470dc RDI=0000000039cf2f34 RBP=ffff88800d6367f0 RSP=ffff888015b97948 R8 =0000000014290aaa R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888015b979b0 R15=000000000000000e RIP=ffffffff82270f42 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 00007f38bbb44900 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=00007ffd664a1000 CR3=0000000019080000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f20248f8a10 CR3=000000000eee8000 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=96eb42c8a28321b44a49b9cf33148bd7 XMM02=ec2efd57dc4c00df000000000011e368 XMM03=d50f660d980c2a71000000000011e438 XMM04=8c3709058c148b6000000000000ae988 XMM05=7dae39aac718750100000000001345a0 XMM06=c291bd5c70af25b90000000000133d10 XMM07=e042d86d42eb936e0000000000124860 XMM08=d50f660d980c2a71000000000011e438 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000