[ 63.234175] BUG: Bad rss-counter state mm:00000000235706f2 type:MM_FILEPAGES val:33 [ 63.235191] BUG: Bad rss-counter state mm:00000000235706f2 type:MM_ANONPAGES val:22 [ 63.402498] ================================================================== [ 63.403438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.404385] Read of size 8 at addr ffff88800e1e55c8 by task sshd/218 [ 63.405162] [ 63.405381] CPU: 1 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.406577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.407559] Call Trace: [ 63.407879] [ 63.408191] dump_stack_lvl+0x91/0xf0 [ 63.408682] print_report+0xcc/0x620 [ 63.409166] ? __virt_addr_valid+0x102/0x340 [ 63.409720] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.410340] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.410958] kasan_report+0xbe/0xf0 [ 63.411451] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.412075] vma_interval_tree_remove+0xc75/0xec0 [ 63.412679] vma_prepare+0xc54/0x11a0 [ 63.413153] __split_vma+0x5af/0x950 [ 63.413629] ? __pfx___split_vma+0x10/0x10 [ 63.414161] ? find_held_lock+0x2c/0x110 [ 63.414689] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.415267] ? lock_is_held_type+0x9f/0x120 [ 63.415811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.416422] ? mtree_range_walk+0x632/0x900 [ 63.416971] ? mas_walk+0x5c7/0x7c0 [ 63.417447] do_vmi_munmap+0x1f1/0x2b0 [ 63.417942] mmap_region+0x1f9/0x2660 [ 63.418425] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.418942] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.419686] ? __pfx_lock_acquire+0x10/0x10 [ 63.420220] ? __pfx_mmap_region+0x10/0x10 [ 63.420755] ? security_mmap_addr+0x7d/0xa0 [ 63.421288] ? get_unmapped_area+0x1f5/0x3f0 [ 63.421838] do_mmap+0x854/0xf00 [ 63.422280] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.422780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.423357] ksys_mmap_pgoff+0x3af/0x500 [ 63.423874] do_syscall_64+0x3f/0x90 [ 63.424354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.425002] RIP: 0033:0x7f40668b8d82 [ 63.425460] 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 [ 63.427606] RSP: 002b:00007fff4d2f6ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.428513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40668b8d82 [ 63.429357] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4065cf2000 [ 63.430204] RBP: 00007f4065cf2000 R08: 0000000000000009 R09: 0000000000001000 [ 63.431069] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8546e5f60 [ 63.431924] R13: 00007fff4d2f6ec0 R14: 00007fff4d2f6ef0 R15: 00007fff4d2f7250 [ 63.432784] [ 63.433073] [ 63.433294] Allocated by task 211: [ 63.433728] kasan_save_stack+0x22/0x50 [ 63.434235] kasan_set_track+0x25/0x30 [ 63.434732] __kasan_slab_alloc+0x59/0x70 [ 63.435262] kmem_cache_alloc+0x16b/0x370 [ 63.435797] vm_area_dup+0x20/0x160 [ 63.436255] __split_vma+0x170/0x950 [ 63.436727] split_vma+0xc6/0x110 [ 63.437173] mprotect_fixup+0x8d2/0xb30 [ 63.437681] do_mprotect_pkey+0x87e/0xd40 [ 63.438209] __x64_sys_mprotect+0x78/0xc0 [ 63.438740] do_syscall_64+0x3f/0x90 [ 63.439227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.439872] [ 63.440085] Freed by task 202: [ 63.440483] kasan_save_stack+0x22/0x50 [ 63.440992] kasan_set_track+0x25/0x30 [ 63.441493] kasan_save_free_info+0x2b/0x50 [ 63.442030] __kasan_slab_free+0x10a/0x190 [ 63.442577] kmem_cache_free+0x10d/0x4d0 [ 63.443106] rcu_core+0x8c8/0x2860 [ 63.443553] __do_softirq+0x1b7/0x7d4 [ 63.444034] [ 63.444250] Last potentially related work creation: [ 63.444836] kasan_save_stack+0x22/0x50 [ 63.445346] __kasan_record_aux_stack+0x8e/0xa0 [ 63.445929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.446585] remove_vma+0x139/0x170 [ 63.447112] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.447675] do_vmi_munmap+0x1f1/0x2b0 [ 63.448168] __vm_munmap+0x138/0x3a0 [ 63.448647] __x64_sys_munmap+0x59/0x80 [ 63.449148] do_syscall_64+0x3f/0x90 [ 63.449627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.450278] [ 63.450495] Second to last potentially related work creation: [ 63.451196] kasan_save_stack+0x22/0x50 [ 63.451708] __kasan_record_aux_stack+0x8e/0xa0 [ 63.452285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.452930] remove_vma+0x139/0x170 [ 63.453381] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.453958] do_vmi_munmap+0x1f1/0x2b0 [ 63.454484] mmap_region+0x1f9/0x2660 [ 63.455005] do_mmap+0x854/0xf00 [ 63.455465] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.455970] ksys_mmap_pgoff+0x3af/0x500 [ 63.456483] do_syscall_64+0x3f/0x90 [ 63.456959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.457621] [ 63.457840] The buggy address belongs to the object at ffff88800e1e5570 [ 63.457840] which belongs to the cache vm_area_struct of size 168 [ 63.459370] The buggy address is located 88 bytes inside of [ 63.459370] freed 168-byte region [ffff88800e1e5570, ffff88800e1e5618) [ 63.460800] [ 63.461018] The buggy address belongs to the physical page: [ 63.461685] page:00000000bafbd000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1e5 [ 63.462789] memcg:ffff8880097fa701 [ 63.463228] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 63.463936] page_type: 0xffffffff() [ 63.464398] raw: 0100000000000200 ffff88800879fc80 ffffea000037df80 dead000000000007 [ 63.465338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097fa701 [ 63.466270] page dumped because: kasan: bad access detected [ 63.466936] [ 63.467170] Memory state around the buggy address: [ 63.467748] ffff88800e1e5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.468616] ffff88800e1e5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 63.469474] >ffff88800e1e5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.470339] ^ [ 63.471030] ffff88800e1e5600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 63.471892] ffff88800e1e5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.472748] ================================================================== [ 63.473734] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 65.224624] BUG: Bad rss-counter state mm:00000000c84a1cb0 type:MM_FILEPAGES val:33 [ 65.225574] BUG: Bad rss-counter state mm:00000000c84a1cb0 type:MM_ANONPAGES val:22 [ 65.661245] BUG: Bad rss-counter state mm:00000000742b41b2 type:MM_FILEPAGES val:33 [ 65.662007] BUG: Bad rss-counter state mm:00000000742b41b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27977' (ECDSA) to the list of known hosts. 2023/06/19 16:30:31 fuzzer started 2023/06/19 16:30:31 dialing manager at localhost:44161 2023/06/19 16:30:31 checking machine... 2023/06/19 16:30:31 checking revisions... [ 66.313282] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:30:31 testing simple program... [ 66.351362] cgroup: Unknown subsys name 'net' [ 66.393400] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:29:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007effbbbf5040 CR3=0000000009460000 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=2031333a30333a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a30333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=00007f1ffde00477 RSP=ffff8880167478f8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f1ffde00477 R13=0000000000000000 R14=ffff8880167a51c0 R15=0000000000000d40 RIP=ffffffff812d8e10 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 00007f1ffd90d900 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=000055a33b42b954 CR3=0000000019e96000 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=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