[ 25.696229] BUG: Bad rss-counter state mm:00000000728768e1 type:MM_FILEPAGES val:33 [ 25.697477] BUG: Bad rss-counter state mm:00000000728768e1 type:MM_ANONPAGES val:22 [ 25.869863] ================================================================== [ 25.870776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.871717] Read of size 8 at addr ffff88800d4aec20 by task sshd/221 [ 25.872489] [ 25.872715] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.873704] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.874674] Call Trace: [ 25.874996] [ 25.875281] dump_stack_lvl+0x91/0xf0 [ 25.875773] print_report+0xcc/0x620 [ 25.876259] ? __virt_addr_valid+0x102/0x340 [ 25.876845] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.877466] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.878086] kasan_report+0xbe/0xf0 [ 25.878562] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.879187] vma_interval_tree_remove+0xc75/0xec0 [ 25.879798] vma_prepare+0xc54/0x11a0 [ 25.880284] __split_vma+0x5af/0x950 [ 25.880765] ? __pfx___split_vma+0x10/0x10 [ 25.881305] ? find_held_lock+0x2c/0x110 [ 25.881829] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.882402] ? lock_is_held_type+0x9f/0x120 [ 25.882953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.883577] ? mtree_range_walk+0x632/0x900 [ 25.884130] ? mas_walk+0x5c7/0x7c0 [ 25.884609] do_vmi_munmap+0x1f1/0x2b0 [ 25.885130] mmap_region+0x1f9/0x2660 [ 25.885630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.886152] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.886884] ? __pfx_lock_acquire+0x10/0x10 [ 25.887419] ? __pfx_mmap_region+0x10/0x10 [ 25.887956] ? security_mmap_addr+0x7d/0xa0 [ 25.888492] ? get_unmapped_area+0x1f5/0x3f0 [ 25.889060] do_mmap+0x854/0xf00 [ 25.889496] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.889996] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.890557] ksys_mmap_pgoff+0x3af/0x500 [ 25.891063] do_syscall_64+0x3f/0x90 [ 25.891538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.892190] RIP: 0033:0x7f8f21f04d82 [ 25.892650] 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 [ 25.894810] RSP: 002b:00007ffd09beec18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.895727] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f21f04d82 [ 25.896584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f2133e000 [ 25.897437] RBP: 00007f8f2133e000 R08: 0000000000000009 R09: 0000000000001000 [ 25.898285] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651733a7d90 [ 25.899169] R13: 00007ffd09beec30 R14: 00007ffd09beec60 R15: 00007ffd09beefc0 [ 25.900084] [ 25.900395] [ 25.900624] Allocated by task 212: [ 25.901093] kasan_save_stack+0x22/0x50 [ 25.901625] kasan_set_track+0x25/0x30 [ 25.902148] __kasan_slab_alloc+0x59/0x70 [ 25.902692] kmem_cache_alloc+0x16b/0x370 [ 25.903235] vm_area_dup+0x20/0x160 [ 25.903711] __split_vma+0x170/0x950 [ 25.904207] split_vma+0xc6/0x110 [ 25.904664] mprotect_fixup+0x8d2/0xb30 [ 25.905213] do_mprotect_pkey+0x87e/0xd40 [ 25.905761] __x64_sys_mprotect+0x78/0xc0 [ 25.906314] do_syscall_64+0x3f/0x90 [ 25.906809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.907483] [ 25.907712] Freed by task 212: [ 25.908126] kasan_save_stack+0x22/0x50 [ 25.908653] kasan_set_track+0x25/0x30 [ 25.909179] kasan_save_free_info+0x2b/0x50 [ 25.909741] __kasan_slab_free+0x10a/0x190 [ 25.910306] kmem_cache_free+0x10d/0x4d0 [ 25.910841] rcu_core+0x8c8/0x2860 [ 25.911308] __do_softirq+0x1b7/0x7d4 [ 25.911812] [ 25.912035] Last potentially related work creation: [ 25.912664] kasan_save_stack+0x22/0x50 [ 25.913203] __kasan_record_aux_stack+0x8e/0xa0 [ 25.913842] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.914533] remove_vma+0x139/0x170 [ 25.915006] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.915597] do_vmi_munmap+0x1f1/0x2b0 [ 25.916109] __vm_munmap+0x138/0x3a0 [ 25.916603] __x64_sys_munmap+0x59/0x80 [ 25.917145] do_syscall_64+0x3f/0x90 [ 25.917640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.918315] [ 25.918539] Second to last potentially related work creation: [ 25.919262] kasan_save_stack+0x22/0x50 [ 25.919792] __kasan_record_aux_stack+0x8e/0xa0 [ 25.920395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.921073] remove_vma+0x139/0x170 [ 25.921541] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.922126] do_vmi_munmap+0x1f1/0x2b0 [ 25.922642] mmap_region+0x1f9/0x2660 [ 25.923140] do_mmap+0x854/0xf00 [ 25.923594] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.924103] ksys_mmap_pgoff+0x7d/0x500 [ 25.924619] do_syscall_64+0x3f/0x90 [ 25.925135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.925806] [ 25.926030] The buggy address belongs to the object at ffff88800d4aebc8 [ 25.926030] which belongs to the cache vm_area_struct of size 168 [ 25.927585] The buggy address is located 88 bytes inside of [ 25.927585] freed 168-byte region [ffff88800d4aebc8, ffff88800d4aec70) [ 25.929069] [ 25.929292] The buggy address belongs to the physical page: [ 25.929985] page:0000000072c94a5f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4ae [ 25.931123] memcg:ffff88800db20201 [ 25.931575] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.932308] page_type: 0xffffffff() [ 25.932790] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 25.933753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db20201 [ 25.934724] page dumped because: kasan: bad access detected [ 25.935421] [ 25.935648] Memory state around the buggy address: [ 25.936261] ffff88800d4aeb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.937188] ffff88800d4aeb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.938086] >ffff88800d4aec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 25.938984] ^ [ 25.939536] ffff88800d4aec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 25.940446] ffff88800d4aed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 25.941349] ================================================================== [ 25.942430] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.048453] BUG: Bad rss-counter state mm:0000000016809c15 type:MM_FILEPAGES val:33 [ 28.049770] BUG: Bad rss-counter state mm:0000000016809c15 type:MM_ANONPAGES val:22 [ 28.475627] BUG: Bad rss-counter state mm:000000006187cd09 type:MM_FILEPAGES val:33 [ 28.476614] BUG: Bad rss-counter state mm:000000006187cd09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42005' (ECDSA) to the list of known hosts. 2023/06/20 04:36:07 fuzzer started 2023/06/20 04:36:07 dialing manager at localhost:44161 2023/06/20 04:36:07 checking machine... 2023/06/20 04:36:07 checking revisions... [ 29.237429] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:36:07 testing simple program... [ 29.285209] cgroup: Unknown subsys name 'net' [ 29.346675] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:36:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000002 RDX=1ffffd40000b7f02 RSI=1ffffd40000d30b1 RDI=ffffea00005bf810 RBP=ffffea00005bf808 RSP=ffff888010107928 R8 =0000000000000000 R9 =ffff88807ffdc648 R10=ffffea00006a1cb0 R11=000000000001a872 R12=ffff88807ffdc618 R13=ffffea00006a1c00 R14=ffffea00006a1c08 R15=ffff88807ffdc500 RIP=ffffffff81789c5a RFL=00000046 [---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 00007f09c5f2b900 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=00007ffee225f000 CR3=000000001c1ee000 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=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 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=0000000000000001 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=00007f288d7ea340 CR3=0000000019af2000 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=36333a3430203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363732 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000