[ 71.945308] BUG: Bad rss-counter state mm:000000003324c266 type:MM_FILEPAGES val:33 [ 71.946597] BUG: Bad rss-counter state mm:000000003324c266 type:MM_ANONPAGES val:22 [ 71.987650] ================================================================== [ 71.988912] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.990149] Read of size 8 at addr ffff88800ec84a50 by task sshd/220 [ 71.991268] [ 71.991529] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 71.992920] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.994172] Call Trace: [ 71.994588] [ 71.995005] dump_stack_lvl+0x91/0xf0 [ 71.995586] print_report+0xcc/0x620 [ 71.996157] ? __virt_addr_valid+0x102/0x340 [ 71.996813] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.997558] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.998289] kasan_report+0xbe/0xf0 [ 71.998864] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.999580] vma_interval_tree_remove+0xc75/0xec0 [ 72.000293] vma_prepare+0xc54/0x11a0 [ 72.000860] __split_vma+0x5af/0x950 [ 72.001416] ? __pfx___split_vma+0x10/0x10 [ 72.002059] ? find_held_lock+0x2c/0x110 [ 72.002683] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.003350] ? lock_is_held_type+0x9f/0x120 [ 72.003986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.004704] ? mtree_range_walk+0x632/0x900 [ 72.005362] ? mas_walk+0x5c7/0x7c0 [ 72.005919] do_vmi_munmap+0x1f1/0x2b0 [ 72.006482] mmap_region+0x1f9/0x2660 [ 72.007028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.007606] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.008421] ? __pfx_lock_acquire+0x10/0x10 [ 72.009028] ? __pfx_mmap_region+0x10/0x10 [ 72.009655] ? security_mmap_addr+0x7d/0xa0 [ 72.010253] ? get_unmapped_area+0x1f5/0x3f0 [ 72.010882] do_mmap+0x854/0xf00 [ 72.011389] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.011958] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.012600] ksys_mmap_pgoff+0x3af/0x500 [ 72.013175] do_syscall_64+0x3f/0x90 [ 72.013754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.014523] RIP: 0033:0x7fa259f02d82 [ 72.015069] 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 [ 72.017621] RSP: 002b:00007ffdecc0fba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.018732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa259f02d82 [ 72.019755] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa25933c000 [ 72.020785] RBP: 00007fa25933c000 R08: 0000000000000009 R09: 0000000000001000 [ 72.021800] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560eece68b20 [ 72.022802] R13: 00007ffdecc0fbc0 R14: 00007ffdecc0fbf0 R15: 00007ffdecc0ff50 [ 72.023819] [ 72.024163] [ 72.024417] Allocated by task 213: [ 72.024925] kasan_save_stack+0x22/0x50 [ 72.025532] kasan_set_track+0x25/0x30 [ 72.026119] __kasan_slab_alloc+0x59/0x70 [ 72.026744] kmem_cache_alloc+0x16b/0x370 [ 72.027352] vm_area_dup+0x20/0x160 [ 72.027892] __split_vma+0x170/0x950 [ 72.028441] split_vma+0xc6/0x110 [ 72.028965] mprotect_fixup+0x8d2/0xb30 [ 72.029560] do_mprotect_pkey+0x87e/0xd40 [ 72.030178] __x64_sys_mprotect+0x78/0xc0 [ 72.030853] do_syscall_64+0x3f/0x90 [ 72.031417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.032174] [ 72.032429] Freed by task 213: [ 72.032895] kasan_save_stack+0x22/0x50 [ 72.033498] kasan_set_track+0x25/0x30 [ 72.034083] kasan_save_free_info+0x2b/0x50 [ 72.034712] __kasan_slab_free+0x10a/0x190 [ 72.035342] kmem_cache_free+0x10d/0x4d0 [ 72.035945] rcu_core+0x8c8/0x2860 [ 72.036470] __do_softirq+0x1b7/0x7d4 [ 72.037043] [ 72.037296] Last potentially related work creation: [ 72.038007] kasan_save_stack+0x22/0x50 [ 72.038597] __kasan_record_aux_stack+0x8e/0xa0 [ 72.039266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.040040] remove_vma+0x139/0x170 [ 72.040576] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.041216] do_vmi_munmap+0x1f1/0x2b0 [ 72.041803] __vm_munmap+0x138/0x3a0 [ 72.042354] __x64_sys_munmap+0x59/0x80 [ 72.042927] do_syscall_64+0x3f/0x90 [ 72.043462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.044181] [ 72.044422] The buggy address belongs to the object at ffff88800ec849f8 [ 72.044422] which belongs to the cache vm_area_struct of size 168 [ 72.046073] The buggy address is located 88 bytes inside of [ 72.046073] freed 168-byte region [ffff88800ec849f8, ffff88800ec84aa0) [ 72.047714] [ 72.047956] The buggy address belongs to the physical page: [ 72.048690] page:00000000146b0c7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec84 [ 72.049992] memcg:ffff88800d3edc01 [ 72.050500] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.051249] page_type: 0xffffffff() [ 72.051772] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 72.052843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3edc01 [ 72.053888] page dumped because: kasan: bad access detected [ 72.054664] [ 72.054916] Memory state around the buggy address: [ 72.055585] ffff88800ec84900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 72.056576] ffff88800ec84980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 72.057589] >ffff88800ec84a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.058582] ^ [ 72.059401] ffff88800ec84a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 72.060397] ffff88800ec84b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.061393] ================================================================== [ 72.062508] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 73.900893] BUG: Bad rss-counter state mm:0000000004161c85 type:MM_FILEPAGES val:33 [ 73.901633] BUG: Bad rss-counter state mm:0000000004161c85 type:MM_ANONPAGES val:22 [ 74.370471] BUG: Bad rss-counter state mm:000000003e26914a type:MM_FILEPAGES val:33 [ 74.371678] BUG: Bad rss-counter state mm:000000003e26914a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58198' (ECDSA) to the list of known hosts. 2023/06/19 19:08:22 fuzzer started 2023/06/19 19:08:22 dialing manager at localhost:44161 2023/06/19 19:08:22 checking machine... 2023/06/19 19:08:22 checking revisions... [ 75.047495] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:08:22 testing simple program... [ 75.097841] cgroup: Unknown subsys name 'net' [ 75.140032] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:07:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860d167c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d1680 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e68 R15=ffff88806ce09a98 RIP=ffffffff81130bad 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 00007fcd427b3900 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=00007fcd41c4a208 CR3=000000000d826000 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=5cf6076bae5a83b358466af88e53842e XMM02=eff9b2d0a8fce9cb0000000000121948 XMM03=2c67c8bc2e329bc30000000000121a70 XMM04=e7063ff7dbe19b2800000000000ae988 XMM05=26e44c49c64e13bd00000000001397e8 XMM06=19e9129bd510f2350000000000138330 XMM07=fb795ef6d65770560000000000128418 XMM08=2c67c8bc2e329bc30000000000121a70 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800a76c0d8 RCX=0000000000000000 RDX=ffff8880144f8000 RSI=ffffffff81f364d1 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff8880166e7970 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=000000001371c348 R13=0000000000000001 R14=ffff8880166e7c38 R15=0000000000000000 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 00007f93bbeb2900 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=00007ffebb99d000 CR3=0000000009478000 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=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