[ 23.800850] BUG: Bad rss-counter state mm:000000005eabca2b type:MM_FILEPAGES val:33 [ 23.802063] BUG: Bad rss-counter state mm:000000005eabca2b type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.889364] ================================================================== [ 23.890073] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.890858] Read of size 8 at addr ffff88800ffff798 by task sshd/218 [ 23.891454] [ 23.891623] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.892294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.893054] Call Trace: [ 23.893401] [ 23.893695] dump_stack_lvl+0x91/0xf0 [ 23.894085] print_report+0xcc/0x620 [ 23.894471] ? __virt_addr_valid+0x102/0x340 [ 23.894899] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.895379] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.895872] kasan_report+0xbe/0xf0 [ 23.896244] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.896726] vma_interval_tree_remove+0xc75/0xec0 [ 23.897195] vma_prepare+0xc54/0x11a0 [ 23.897569] __split_vma+0x5af/0x950 [ 23.897937] ? __pfx___split_vma+0x10/0x10 [ 23.898369] ? find_held_lock+0x2c/0x110 [ 23.898775] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.899217] ? lock_is_held_type+0x9f/0x120 [ 23.899638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.900110] ? mtree_range_walk+0x632/0x900 [ 23.900542] ? mas_walk+0x5c7/0x7c0 [ 23.900908] do_vmi_munmap+0x1f1/0x2b0 [ 23.901294] mmap_region+0x1f9/0x2660 [ 23.901666] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.902066] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.902629] ? __pfx_lock_acquire+0x10/0x10 [ 23.903044] ? __pfx_mmap_region+0x10/0x10 [ 23.903459] ? security_mmap_addr+0x7d/0xa0 [ 23.903874] ? get_unmapped_area+0x1f5/0x3f0 [ 23.904304] do_mmap+0x854/0xf00 [ 23.904644] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.905027] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.905465] ksys_mmap_pgoff+0x3af/0x500 [ 23.905864] do_syscall_64+0x3f/0x90 [ 23.906245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.906748] RIP: 0033:0x7fb022591d82 [ 23.907105] 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 [ 23.908761] RSP: 002b:00007ffc9f83f658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.909469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb022591d82 [ 23.910135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0219cb000 [ 23.910816] RBP: 00007fb0219cb000 R08: 0000000000000009 R09: 0000000000001000 [ 23.911473] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc1d3fdec0 [ 23.912126] R13: 00007ffc9f83f670 R14: 00007ffc9f83f6a0 R15: 00007ffc9f83fa00 [ 23.912791] [ 23.913019] [ 23.913187] Allocated by task 211: [ 23.913517] kasan_save_stack+0x22/0x50 [ 23.913910] kasan_set_track+0x25/0x30 [ 23.914299] __kasan_slab_alloc+0x59/0x70 [ 23.914708] kmem_cache_alloc+0x16b/0x370 [ 23.915109] vm_area_dup+0x20/0x160 [ 23.915463] __split_vma+0x170/0x950 [ 23.915827] split_vma+0xc6/0x110 [ 23.916167] mprotect_fixup+0x8d2/0xb30 [ 23.916559] do_mprotect_pkey+0x87e/0xd40 [ 23.916965] __x64_sys_mprotect+0x78/0xc0 [ 23.917372] do_syscall_64+0x3f/0x90 [ 23.917741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.918265] [ 23.918435] Freed by task 211: [ 23.918745] kasan_save_stack+0x22/0x50 [ 23.919138] kasan_set_track+0x25/0x30 [ 23.919522] kasan_save_free_info+0x2b/0x50 [ 23.919938] __kasan_slab_free+0x10a/0x190 [ 23.920352] kmem_cache_free+0x10d/0x4d0 [ 23.920748] rcu_core+0x8c8/0x2860 [ 23.921089] __do_softirq+0x1b7/0x7d4 [ 23.921459] [ 23.921626] Last potentially related work creation: [ 23.922083] kasan_save_stack+0x22/0x50 [ 23.922480] __kasan_record_aux_stack+0x8e/0xa0 [ 23.922927] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.923429] remove_vma+0x139/0x170 [ 23.923774] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.924206] do_vmi_munmap+0x1f1/0x2b0 [ 23.924582] __vm_munmap+0x138/0x3a0 [ 23.924944] __x64_sys_munmap+0x59/0x80 [ 23.925329] do_syscall_64+0x3f/0x90 [ 23.925697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.926209] [ 23.926378] Second to last potentially related work creation: [ 23.926913] kasan_save_stack+0x22/0x50 [ 23.927302] __kasan_record_aux_stack+0x8e/0xa0 [ 23.927750] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.928251] remove_vma+0x139/0x170 [ 23.928602] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.929035] do_vmi_munmap+0x1f1/0x2b0 [ 23.929411] mmap_region+0x1f9/0x2660 [ 23.929785] do_mmap+0x854/0xf00 [ 23.930121] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.930507] ksys_mmap_pgoff+0x3af/0x500 [ 23.930898] do_syscall_64+0x3f/0x90 [ 23.931265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.931763] [ 23.931933] The buggy address belongs to the object at ffff88800ffff740 [ 23.931933] which belongs to the cache vm_area_struct of size 168 [ 23.933080] The buggy address is located 88 bytes inside of [ 23.933080] freed 168-byte region [ffff88800ffff740, ffff88800ffff7e8) [ 23.934178] [ 23.934413] The buggy address belongs to the physical page: [ 23.934930] page:00000000be758440 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffff [ 23.935770] memcg:ffff88800ccb0401 [ 23.936103] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.936603] page_type: 0xffffffff() [ 23.936955] raw: 0100000000000200 ffff8880087a0c80 ffffea0000364fc0 dead000000000004 [ 23.937669] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ccb0401 [ 23.938386] page dumped because: kasan: bad access detected [ 23.938904] [ 23.939070] Memory state around the buggy address: [ 23.939524] ffff88800ffff680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.940194] ffff88800ffff700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.940861] >ffff88800ffff780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.941525] ^ [ 23.941913] ffff88800ffff800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.942584] ffff88800ffff880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.943241] ================================================================== [ 23.943953] Disabling lock debugging due to kernel taint [ 25.879427] BUG: Bad rss-counter state mm:00000000fbce838c type:MM_FILEPAGES val:33 [ 25.880240] BUG: Bad rss-counter state mm:00000000fbce838c type:MM_ANONPAGES val:22 [ 26.316510] BUG: Bad rss-counter state mm:00000000c2422775 type:MM_FILEPAGES val:33 [ 26.317286] BUG: Bad rss-counter state mm:00000000c2422775 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28196' (ECDSA) to the list of known hosts. 2023/06/21 01:38:36 fuzzer started 2023/06/21 01:38:36 dialing manager at localhost:36067 2023/06/21 01:38:36 checking machine... 2023/06/21 01:38:36 checking revisions... [ 27.021460] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:38:36 testing simple program... [ 27.077508] cgroup: Unknown subsys name 'net' [ 27.132439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:38:36 Registers: info registers vcpu 0 RAX=ffffed1002cf140d RBX=0000000000000000 RCX=ffffffff83c20a25 RDX=ffffed1002cf140d RSI=0000000000000008 RDI=ffff88801678a060 RBP=ffffed1002cf140c RSP=ffff8880145df9a8 R8 =0000000000000000 R9 =ffffed1002cf140c R10=ffff88801678a067 R11=63206e6f69737365 R12=ffff88801678a510 R13=ffff88801678a060 R14=0000000000000053 R15=ffff88800e33f780 RIP=ffffffff8180f12f 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 00007fcf7a237900 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=00007fcf796b1d30 CR3=000000000e060000 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=b74c2db1c4dcd98e32455357a456a521 XMM02=000000000011a618eff9b2d0a8fce9cb XMM03=000000000011a6e82c67c8bc2e329bc3 XMM04=ef154a0a5465297100000000000ae988 XMM05=0d01c2d84b989c9c0000000000133a60 XMM06=bdf2e299e47b49d50000000000132210 XMM07=fb795ef6d657705600000000001214d8 XMM08=2c67c8bc2e329bc3000000000011a688 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100190f285 RBX=ffff88800c8793f8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c879428 RBP=ffff88800b4c1dd0 RSP=ffff8880168cfd28 R8 =0000000000000001 R9 =ffffed1002d19f99 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800ea307e0 R14=ffffffff81ef10be R15=ffff8880192e6840 RIP=ffffffff818464e2 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 00007fb314a2b900 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=00007fb314fe2618 CR3=000000000f636000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000