[ 24.079070] BUG: Bad rss-counter state mm:00000000ac5c7cf4 type:MM_FILEPAGES val:33 [ 24.080270] BUG: Bad rss-counter state mm:00000000ac5c7cf4 type:MM_ANONPAGES val:22 [ 24.112726] ================================================================== [ 24.113288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.113843] Read of size 8 at addr ffff888019bef4e0 by task sshd/219 [ 24.114302] [ 24.114435] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.114952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.115529] Call Trace: [ 24.115722] [ 24.115897] dump_stack_lvl+0x91/0xf0 [ 24.116217] print_report+0xcc/0x620 [ 24.116510] ? __virt_addr_valid+0x102/0x340 [ 24.116918] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.117371] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.117925] kasan_report+0xbe/0xf0 [ 24.118275] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.118729] vma_interval_tree_remove+0xc75/0xec0 [ 24.119178] vma_prepare+0xc54/0x11a0 [ 24.119528] __split_vma+0x5af/0x950 [ 24.119897] ? __pfx___split_vma+0x10/0x10 [ 24.120294] ? find_held_lock+0x2c/0x110 [ 24.120677] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.121093] ? lock_is_held_type+0x9f/0x120 [ 24.121490] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.121937] ? mtree_range_walk+0x632/0x900 [ 24.122344] ? mas_walk+0x5c7/0x7c0 [ 24.122697] do_vmi_munmap+0x1f1/0x2b0 [ 24.123059] mmap_region+0x1f9/0x2660 [ 24.123417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.123794] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.124339] ? __pfx_lock_acquire+0x10/0x10 [ 24.124694] ? __pfx_mmap_region+0x10/0x10 [ 24.125009] ? security_mmap_addr+0x7d/0xa0 [ 24.125324] ? get_unmapped_area+0x1f5/0x3f0 [ 24.125648] do_mmap+0x854/0xf00 [ 24.125911] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.126205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.126537] ksys_mmap_pgoff+0x3af/0x500 [ 24.126840] do_syscall_64+0x3f/0x90 [ 24.127127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.127515] RIP: 0033:0x7fead1d2dd82 [ 24.127783] 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 [ 24.129038] RSP: 002b:00007ffdf8545a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.129578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fead1d2dd82 [ 24.130078] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fead1167000 [ 24.130577] RBP: 00007fead1167000 R08: 0000000000000009 R09: 0000000000001000 [ 24.131078] R10: 0000000000000812 R11: 0000000000000206 R12: 000056296a671ec0 [ 24.131584] R13: 00007ffdf8545a50 R14: 00007ffdf8545a80 R15: 00007ffdf8545de0 [ 24.132105] [ 24.132283] [ 24.132413] Allocated by task 209: [ 24.132666] kasan_save_stack+0x22/0x50 [ 24.132964] kasan_set_track+0x25/0x30 [ 24.133254] __kasan_slab_alloc+0x59/0x70 [ 24.133562] kmem_cache_alloc+0x16b/0x370 [ 24.133867] vm_area_dup+0x20/0x160 [ 24.134135] __split_vma+0x170/0x950 [ 24.134410] split_vma+0xc6/0x110 [ 24.134668] mprotect_fixup+0x8d2/0xb30 [ 24.134965] do_mprotect_pkey+0x87e/0xd40 [ 24.135270] __x64_sys_mprotect+0x78/0xc0 [ 24.135576] do_syscall_64+0x3f/0x90 [ 24.135856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.136245] [ 24.136373] Freed by task 209: [ 24.136606] kasan_save_stack+0x22/0x50 [ 24.136905] kasan_set_track+0x25/0x30 [ 24.137194] kasan_save_free_info+0x2b/0x50 [ 24.137505] __kasan_slab_free+0x10a/0x190 [ 24.137820] kmem_cache_free+0x10d/0x4d0 [ 24.138120] rcu_core+0x8c8/0x2860 [ 24.138382] __do_softirq+0x1b7/0x7d4 [ 24.138666] [ 24.138795] Last potentially related work creation: [ 24.139140] kasan_save_stack+0x22/0x50 [ 24.139439] __kasan_record_aux_stack+0x8e/0xa0 [ 24.139774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.140160] remove_vma+0x139/0x170 [ 24.140428] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.140753] do_vmi_munmap+0x1f1/0x2b0 [ 24.141041] __vm_munmap+0x138/0x3a0 [ 24.141315] __x64_sys_munmap+0x59/0x80 [ 24.141608] do_syscall_64+0x3f/0x90 [ 24.141888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.142266] [ 24.142394] The buggy address belongs to the object at ffff888019bef488 [ 24.142394] which belongs to the cache vm_area_struct of size 168 [ 24.143254] The buggy address is located 88 bytes inside of [ 24.143254] freed 168-byte region [ffff888019bef488, ffff888019bef530) [ 24.144077] [ 24.144224] The buggy address belongs to the physical page: [ 24.144607] page:000000001f5b8eb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bef [ 24.145244] memcg:ffff888019bb1501 [ 24.145494] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.145873] page_type: 0xffffffff() [ 24.146138] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.146673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bb1501 [ 24.147200] page dumped because: kasan: bad access detected [ 24.147580] [ 24.147708] Memory state around the buggy address: [ 24.148042] ffff888019bef380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.148552] ffff888019bef400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.149051] >ffff888019bef480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.149546] ^ [ 24.149978] ffff888019bef500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.150469] ffff888019bef580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.150960] ================================================================== [ 24.151539] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.666092] BUG: Bad rss-counter state mm:0000000074a6ad6f type:MM_FILEPAGES val:33 [ 25.667010] BUG: Bad rss-counter state mm:0000000074a6ad6f type:MM_ANONPAGES val:22 [ 26.057597] BUG: Bad rss-counter state mm:00000000b2624c8a type:MM_FILEPAGES val:33 [ 26.058513] BUG: Bad rss-counter state mm:00000000b2624c8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42055' (ECDSA) to the list of known hosts. 2023/06/20 16:22:53 fuzzer started 2023/06/20 16:22:54 dialing manager at localhost:36067 2023/06/20 16:22:54 checking machine... 2023/06/20 16:22:54 checking revisions... [ 26.691409] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:22:54 testing simple program... [ 26.748293] cgroup: Unknown subsys name 'net' [ 26.814775] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:22:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f8cb0a0 RCX=0000000000000000 RDX=ffff88800f4d9b40 RSI=ffffffff81f348d6 RDI=ffff8880108e0c08 RBP=0000000000000001 RSP=ffff88801c767940 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800f8cb0a8 R13=ffff8880108e0c08 R14=ffff88801c767c60 R15=0000000000001032 RIP=ffffffff844d922f RFL=00000293 [--S-A-C] 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 00007fd54ad37900 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=00007ffe1bdab000 CR3=000000000ecc0000 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=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 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=0000000000000001 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=00007f3fc9026440 CR3=0000000015976000 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=2033353a32323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a32323a3631203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000