[ 27.508792] BUG: Bad rss-counter state mm:00000000781900ac type:MM_FILEPAGES val:33 [ 27.510004] BUG: Bad rss-counter state mm:00000000781900ac type:MM_ANONPAGES val:22 [ 27.591244] ================================================================== [ 27.592320] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.593444] Read of size 8 at addr ffff888009492058 by task sshd/219 [ 27.594477] [ 27.594733] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.595740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.596930] Call Trace: [ 27.597289] [ 27.597579] dump_stack_lvl+0x91/0xf0 [ 27.598062] print_report+0xcc/0x620 [ 27.598540] ? __virt_addr_valid+0x102/0x340 [ 27.599092] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.599714] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.600326] kasan_report+0xbe/0xf0 [ 27.600806] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.601430] vma_interval_tree_remove+0xc75/0xec0 [ 27.602037] vma_prepare+0xc54/0x11a0 [ 27.602511] __split_vma+0x5af/0x950 [ 27.602998] ? __pfx___split_vma+0x10/0x10 [ 27.603538] ? find_held_lock+0x2c/0x110 [ 27.604055] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.604636] ? lock_is_held_type+0x9f/0x120 [ 27.605172] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.605782] ? mtree_range_walk+0x632/0x900 [ 27.606326] ? mas_walk+0x5c7/0x7c0 [ 27.606794] do_vmi_munmap+0x1f1/0x2b0 [ 27.607294] mmap_region+0x1f9/0x2660 [ 27.607773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.608281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.609006] ? __pfx_lock_acquire+0x10/0x10 [ 27.609543] ? __pfx_mmap_region+0x10/0x10 [ 27.610074] ? security_mmap_addr+0x7d/0xa0 [ 27.610603] ? get_unmapped_area+0x1f5/0x3f0 [ 27.611148] do_mmap+0x854/0xf00 [ 27.611589] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.612079] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.612664] ksys_mmap_pgoff+0x3af/0x500 [ 27.613170] do_syscall_64+0x3f/0x90 [ 27.613647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.614299] RIP: 0033:0x7f2f677ead82 [ 27.614757] 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 [ 27.616885] RSP: 002b:00007ffd792b57a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.617785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f677ead82 [ 27.618633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f66c24000 [ 27.619476] RBP: 00007f2f66c24000 R08: 0000000000000009 R09: 0000000000001000 [ 27.620310] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8a2306b20 [ 27.621157] R13: 00007ffd792b57c0 R14: 00007ffd792b57f0 R15: 00007ffd792b5b50 [ 27.622011] [ 27.622304] [ 27.622520] Allocated by task 212: [ 27.622945] kasan_save_stack+0x22/0x50 [ 27.623452] kasan_set_track+0x25/0x30 [ 27.623954] __kasan_slab_alloc+0x59/0x70 [ 27.624476] kmem_cache_alloc+0x16b/0x370 [ 27.625009] vm_area_dup+0x20/0x160 [ 27.625459] __split_vma+0x170/0x950 [ 27.625927] split_vma+0xc6/0x110 [ 27.626362] mprotect_fixup+0x8d2/0xb30 [ 27.626858] do_mprotect_pkey+0x87e/0xd40 [ 27.627376] __x64_sys_mprotect+0x78/0xc0 [ 27.627897] do_syscall_64+0x3f/0x90 [ 27.628367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.629019] [ 27.629233] Freed by task 212: [ 27.629628] kasan_save_stack+0x22/0x50 [ 27.630132] kasan_set_track+0x25/0x30 [ 27.630631] kasan_save_free_info+0x2b/0x50 [ 27.631156] __kasan_slab_free+0x10a/0x190 [ 27.631687] kmem_cache_free+0x10d/0x4d0 [ 27.632188] rcu_core+0x8c8/0x2860 [ 27.632658] __do_softirq+0x1b7/0x7d4 [ 27.633130] [ 27.633344] Last potentially related work creation: [ 27.633931] kasan_save_stack+0x22/0x50 [ 27.634429] __kasan_record_aux_stack+0x8e/0xa0 [ 27.635001] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.635649] remove_vma+0x139/0x170 [ 27.636098] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.636666] do_vmi_munmap+0x1f1/0x2b0 [ 27.637153] __vm_munmap+0x138/0x3a0 [ 27.637623] __x64_sys_munmap+0x59/0x80 [ 27.638116] do_syscall_64+0x3f/0x90 [ 27.638588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.639224] [ 27.639437] The buggy address belongs to the object at ffff888009492000 [ 27.639437] which belongs to the cache vm_area_struct of size 168 [ 27.640924] The buggy address is located 88 bytes inside of [ 27.640924] freed 168-byte region [ffff888009492000, ffff8880094920a8) [ 27.642318] [ 27.642533] The buggy address belongs to the physical page: [ 27.643184] page:000000003252a10b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9492 [ 27.644255] memcg:ffff88800ff23301 [ 27.644689] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.645331] page_type: 0xffffffff() [ 27.645783] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 27.646694] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff23301 [ 27.647601] page dumped because: kasan: bad access detected [ 27.648259] [ 27.648472] Memory state around the buggy address: [ 27.649054] ffff888009491f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 27.649905] ffff888009491f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.650757] >ffff888009492000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.651606] ^ [ 27.652332] ffff888009492080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 27.653200] ffff888009492100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.654051] ================================================================== [ 27.654973] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.394477] BUG: Bad rss-counter state mm:00000000aaf9ad08 type:MM_FILEPAGES val:33 [ 29.395208] BUG: Bad rss-counter state mm:00000000aaf9ad08 type:MM_ANONPAGES val:22 [ 29.962586] BUG: Bad rss-counter state mm:00000000b3307930 type:MM_FILEPAGES val:33 [ 29.963746] BUG: Bad rss-counter state mm:00000000b3307930 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7987' (ECDSA) to the list of known hosts. 2023/06/19 19:32:22 fuzzer started 2023/06/19 19:32:22 dialing manager at localhost:44161 2023/06/19 19:32:22 checking machine... 2023/06/19 19:32:22 checking revisions... [ 30.612874] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:32:22 testing simple program... [ 30.666038] cgroup: Unknown subsys name 'net' [ 30.707753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055c00b5c5ed0 RCX=00000000000001b6 RDX=00000000000001b6 RSI=0000000000080000 RDI=00007f7c797aa15e RBP=0000000000000008 RSP=00007fff18d9ef68 R8 =0000000000000008 R9 =0000000000000001 R10=00007f7c797aa009 R11=0000000000000000 R12=00007f7c797aa003 R13=000055c00b5c5ed0 R14=0000000000000001 R15=000055c00b5be770 RIP=00007f7c79c9bed0 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7c797b4900 00000000 00000000 GS =0000 0000000000000000 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=00007f7c79d6c0b0 CR3=000000000f25a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007f3319e306a0 CR3=000000000f2be000 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=568ef9a1c87b7bb4f9462d0061fbdc48 XMM02=000000000011cfa8ec2efd57dc4c00df XMM03=0000000000123a2884ff8e93ad113e20 XMM04=3bb5527647b6c01700000000000ae988 XMM05=dfcdbad4f1609c370000000000133260 XMM06=2d543645bb0a3ad20000000000132438 XMM07=e042d86d42eb936e0000000000123ca8 XMM08=84ff8e93ad113e20000000000011d008 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000