[ 24.285263] BUG: Bad rss-counter state mm:000000001fd4ad92 type:MM_FILEPAGES val:33 [ 24.285806] BUG: Bad rss-counter state mm:000000001fd4ad92 type:MM_ANONPAGES val:22 [ 24.402118] ================================================================== [ 24.402791] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.403510] Read of size 8 at addr ffff888019f10228 by task sshd/219 [ 24.404089] [ 24.404253] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.404916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.405757] Call Trace: [ 24.406003] [ 24.406221] dump_stack_lvl+0x91/0xf0 [ 24.406600] print_report+0xcc/0x620 [ 24.406973] ? __virt_addr_valid+0x102/0x340 [ 24.407392] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.407879] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.408246] kasan_report+0xbe/0xf0 [ 24.408507] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.408847] vma_interval_tree_remove+0xc75/0xec0 [ 24.409184] vma_prepare+0xc54/0x11a0 [ 24.409448] __split_vma+0x5af/0x950 [ 24.409708] ? __pfx___split_vma+0x10/0x10 [ 24.410004] ? find_held_lock+0x2c/0x110 [ 24.410297] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.410605] ? lock_is_held_type+0x9f/0x120 [ 24.410906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.411239] ? mtree_range_walk+0x632/0x900 [ 24.411540] ? mas_walk+0x5c7/0x7c0 [ 24.411801] do_vmi_munmap+0x1f1/0x2b0 [ 24.412069] mmap_region+0x1f9/0x2660 [ 24.412331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.412616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.413014] ? __pfx_lock_acquire+0x10/0x10 [ 24.413313] ? __pfx_mmap_region+0x10/0x10 [ 24.413603] ? security_mmap_addr+0x7d/0xa0 [ 24.413896] ? get_unmapped_area+0x1f5/0x3f0 [ 24.414199] do_mmap+0x854/0xf00 [ 24.414439] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.414708] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.415014] ksys_mmap_pgoff+0x3af/0x500 [ 24.415295] do_syscall_64+0x3f/0x90 [ 24.415562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.415916] RIP: 0033:0x7fe66c851d82 [ 24.416164] 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 [ 24.417346] RSP: 002b:00007ffdd9acb9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.417841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe66c851d82 [ 24.418304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe66bc8b000 [ 24.418765] RBP: 00007fe66bc8b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.419231] R10: 0000000000000812 R11: 0000000000000206 R12: 000055564f63bec0 [ 24.419688] R13: 00007ffdd9acba10 R14: 00007ffdd9acba40 R15: 00007ffdd9acbda0 [ 24.420155] [ 24.420316] [ 24.420434] Allocated by task 208: [ 24.420669] kasan_save_stack+0x22/0x50 [ 24.420941] kasan_set_track+0x25/0x30 [ 24.421215] __kasan_slab_alloc+0x59/0x70 [ 24.421497] kmem_cache_alloc+0x16b/0x370 [ 24.421778] vm_area_dup+0x20/0x160 [ 24.422028] __split_vma+0x170/0x950 [ 24.422283] split_vma+0xc6/0x110 [ 24.422524] mprotect_fixup+0x8d2/0xb30 [ 24.422794] do_mprotect_pkey+0x87e/0xd40 [ 24.423076] __x64_sys_mprotect+0x78/0xc0 [ 24.423359] do_syscall_64+0x3f/0x90 [ 24.423617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.423964] [ 24.424082] Freed by task 13: [ 24.424293] kasan_save_stack+0x22/0x50 [ 24.424566] kasan_set_track+0x25/0x30 [ 24.424832] kasan_save_free_info+0x2b/0x50 [ 24.425124] __kasan_slab_free+0x10a/0x190 [ 24.425418] kmem_cache_free+0x10d/0x4d0 [ 24.425697] rcu_core+0x8c8/0x2860 [ 24.425941] __do_softirq+0x1b7/0x7d4 [ 24.426205] [ 24.426324] Last potentially related work creation: [ 24.426641] kasan_save_stack+0x22/0x50 [ 24.426915] __kasan_record_aux_stack+0x8e/0xa0 [ 24.427224] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.427575] remove_vma+0x139/0x170 [ 24.427819] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.428123] do_vmi_munmap+0x1f1/0x2b0 [ 24.428390] __vm_munmap+0x138/0x3a0 [ 24.428644] __x64_sys_munmap+0x59/0x80 [ 24.428914] do_syscall_64+0x3f/0x90 [ 24.429187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.429539] [ 24.429657] The buggy address belongs to the object at ffff888019f101d0 [ 24.429657] which belongs to the cache vm_area_struct of size 168 [ 24.430451] The buggy address is located 88 bytes inside of [ 24.430451] freed 168-byte region [ffff888019f101d0, ffff888019f10278) [ 24.431214] [ 24.431333] The buggy address belongs to the physical page: [ 24.431694] page:000000009cf00bc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f10 [ 24.432298] memcg:ffff888019ed2d01 [ 24.432530] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.432884] page_type: 0xffffffff() [ 24.433129] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.433629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ed2d01 [ 24.434121] page dumped because: kasan: bad access detected [ 24.434475] [ 24.434590] Memory state around the buggy address: [ 24.434905] ffff888019f10100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.435374] ffff888019f10180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.435836] >ffff888019f10200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.436295] ^ [ 24.436592] ffff888019f10280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.437053] ffff888019f10300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.437510] ================================================================== [ 24.438018] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.972280] BUG: Bad rss-counter state mm:0000000092639ffc type:MM_FILEPAGES val:33 [ 26.973625] BUG: Bad rss-counter state mm:0000000092639ffc type:MM_ANONPAGES val:22 [ 27.442849] BUG: Bad rss-counter state mm:00000000d2e42053 type:MM_FILEPAGES val:33 [ 27.443806] BUG: Bad rss-counter state mm:00000000d2e42053 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61602' (ECDSA) to the list of known hosts. 2023/06/20 13:18:05 fuzzer started 2023/06/20 13:18:06 dialing manager at localhost:36067 2023/06/20 13:18:06 checking machine... 2023/06/20 13:18:06 checking revisions... [ 28.202591] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:18:06 testing simple program... [ 28.263636] cgroup: Unknown subsys name 'net' [ 28.306769] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:18:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801915dc80 RCX=0000000000000000 RDX=ffff88800f0dd1c0 RSI=ffffffff8369d04f RDI=0000000000000001 RBP=ffff88800fce79b0 RSP=ffff88800fce7820 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=322e322e302e3031 R12=ffff8880090d1800 R13=176a6079883bba7a R14=ffff8880090d1860 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000286 [--S--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 00007fb579cd1700 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=00007f846b4156b0 CR3=000000000e2e8000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323531 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813782f8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e379c0 RSI=ffffffff813782f8 RDI=ffff888008e37978 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =0000000000000001 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008e37a40 R13=ffff888008e379c0 R14=ffff888008e0d1c0 R15=ffff888008e37978 RIP=ffffffff81130641 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 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=00007ffc10b30000 CR3=0000000019da4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000