[ 30.459814] BUG: Bad rss-counter state mm:0000000053e43b5a type:MM_FILEPAGES val:33 [ 30.460547] BUG: Bad rss-counter state mm:0000000053e43b5a type:MM_ANONPAGES val:22 [ 30.611779] ================================================================== [ 30.612393] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.613002] Read of size 8 at addr ffff88801477b058 by task sshd/219 [ 30.613497] [ 30.613640] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.614195] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.615007] Call Trace: [ 30.615330] [ 30.615797] dump_stack_lvl+0x91/0xf0 [ 30.616155] print_report+0xcc/0x620 [ 30.616512] ? __virt_addr_valid+0x102/0x340 [ 30.616909] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.617356] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.617782] kasan_report+0xbe/0xf0 [ 30.618096] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.618611] vma_interval_tree_remove+0xc75/0xec0 [ 30.619015] vma_prepare+0xc54/0x11a0 [ 30.619338] __split_vma+0x5af/0x950 [ 30.619657] ? __pfx___split_vma+0x10/0x10 [ 30.620023] ? find_held_lock+0x2c/0x110 [ 30.620382] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.620768] ? lock_is_held_type+0x9f/0x120 [ 30.621131] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.621527] ? mtree_range_walk+0x632/0x900 [ 30.621890] ? mas_walk+0x5c7/0x7c0 [ 30.622204] do_vmi_munmap+0x1f1/0x2b0 [ 30.622611] mmap_region+0x1f9/0x2660 [ 30.622929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.623333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.623796] ? __pfx_lock_acquire+0x10/0x10 [ 30.624195] ? __pfx_mmap_region+0x10/0x10 [ 30.624552] ? security_mmap_addr+0x7d/0xa0 [ 30.624919] ? get_unmapped_area+0x1f5/0x3f0 [ 30.625293] do_mmap+0x854/0xf00 [ 30.625595] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.625931] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.626311] ksys_mmap_pgoff+0x3af/0x500 [ 30.626741] do_syscall_64+0x3f/0x90 [ 30.627074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627531] RIP: 0033:0x7f53b09f8d82 [ 30.627847] 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 [ 30.629347] RSP: 002b:00007ffcba133ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.629955] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53b09f8d82 [ 30.630623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53afe32000 [ 30.631311] RBP: 00007f53afe32000 R08: 0000000000000009 R09: 0000000000001000 [ 30.631958] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c57d6ddec0 [ 30.632603] R13: 00007ffcba133af0 R14: 00007ffcba133b20 R15: 00007ffcba133e80 [ 30.633252] [ 30.633467] [ 30.633628] Allocated by task 212: [ 30.633958] kasan_save_stack+0x22/0x50 [ 30.634389] kasan_set_track+0x25/0x30 [ 30.634777] __kasan_slab_alloc+0x59/0x70 [ 30.635180] kmem_cache_alloc+0x16b/0x370 [ 30.635584] vm_area_dup+0x20/0x160 [ 30.635943] __split_vma+0x170/0x950 [ 30.636306] split_vma+0xc6/0x110 [ 30.636657] mprotect_fixup+0x8d2/0xb30 [ 30.637049] do_mprotect_pkey+0x87e/0xd40 [ 30.637460] __x64_sys_mprotect+0x78/0xc0 [ 30.637864] do_syscall_64+0x3f/0x90 [ 30.638234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.638753] [ 30.638920] Freed by task 212: [ 30.639225] kasan_save_stack+0x22/0x50 [ 30.639622] kasan_set_track+0x25/0x30 [ 30.640013] kasan_save_free_info+0x2b/0x50 [ 30.640431] __kasan_slab_free+0x10a/0x190 [ 30.640839] kmem_cache_free+0x10d/0x4d0 [ 30.641242] rcu_core+0x8c8/0x2860 [ 30.641596] __do_softirq+0x1b7/0x7d4 [ 30.641976] [ 30.642146] Last potentially related work creation: [ 30.642618] kasan_save_stack+0x22/0x50 [ 30.642982] __kasan_record_aux_stack+0x8e/0xa0 [ 30.643411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.643881] remove_vma+0x139/0x170 [ 30.644209] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.644587] do_vmi_munmap+0x1f1/0x2b0 [ 30.644918] __vm_munmap+0x138/0x3a0 [ 30.645266] __x64_sys_munmap+0x59/0x80 [ 30.645633] do_syscall_64+0x3f/0x90 [ 30.645977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.646478] [ 30.646637] The buggy address belongs to the object at ffff88801477b000 [ 30.646637] which belongs to the cache vm_area_struct of size 168 [ 30.647667] The buggy address is located 88 bytes inside of [ 30.647667] freed 168-byte region [ffff88801477b000, ffff88801477b0a8) [ 30.648650] [ 30.648813] The buggy address belongs to the physical page: [ 30.649290] page:0000000018e4c27f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1477b [ 30.650063] memcg:ffff88800ed86601 [ 30.650384] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.650837] page_type: 0xffffffff() [ 30.651159] raw: 0100000000000200 ffff8880087a0c80 ffffea00005acb80 dead000000000006 [ 30.651818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed86601 [ 30.652457] page dumped because: kasan: bad access detected [ 30.652929] [ 30.653088] Memory state around the buggy address: [ 30.653517] ffff88801477af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.654160] ffff88801477af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.654827] >ffff88801477b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.655479] ^ [ 30.656030] ffff88801477b080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.656692] ffff88801477b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.657357] ================================================================== [ 30.658295] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.889556] BUG: Bad rss-counter state mm:00000000a5859932 type:MM_FILEPAGES val:33 [ 32.890558] BUG: Bad rss-counter state mm:00000000a5859932 type:MM_ANONPAGES val:22 [ 33.323019] BUG: Bad rss-counter state mm:00000000191d3aa1 type:MM_FILEPAGES val:33 [ 33.323722] BUG: Bad rss-counter state mm:00000000191d3aa1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11281' (ECDSA) to the list of known hosts. 2023/06/21 08:16:35 fuzzer started 2023/06/21 08:16:35 dialing manager at localhost:36067 2023/06/21 08:16:35 checking machine... 2023/06/21 08:16:35 checking revisions... 2023/06/21 08:16:35 testing simple program... [ 34.023163] kmemleak: Automatic memory scanning thread ended [ 34.068984] cgroup: Unknown subsys name 'net' [ 34.261999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:16:35 Registers: info registers vcpu 0 RAX=1ffffd400003602e RBX=ffffea00001b0140 RCX=ffffffff8170c3db RDX=0000000000000000 RSI=0000000000000004 RDI=ffffea00001b0170 RBP=ffffea00001b0170 RSP=ffff888016baf948 R8 =0000000000000000 R9 =fffff9400003602e R10=ffffea00001b0173 R11=0000000000000000 R12=ffffea00001b0140 R13=00007f5ee59b5000 R14=ffff88801be6dda0 R15=dffffc0000000000 RIP=ffffffff8170c3e7 RFL=00000216 [----AP-] 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 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=00007f5ee5d6c328 CR3=0000000018e26000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=ffff888008c04400 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=00007f87ec2a4000 CR3=000000000ef5e000 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=2034333a36313a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a36313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000