[ 30.581868] BUG: Bad rss-counter state mm:000000008651bdac type:MM_FILEPAGES val:33 [ 30.583080] BUG: Bad rss-counter state mm:000000008651bdac type:MM_ANONPAGES val:22 [ 30.621918] ================================================================== [ 30.622897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.623912] Read of size 8 at addr ffff88800e2d0df0 by task sshd/218 [ 30.624653] [ 30.624875] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.625755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.626714] Call Trace: [ 30.627025] [ 30.627302] dump_stack_lvl+0x91/0xf0 [ 30.627787] print_report+0xcc/0x620 [ 30.628272] ? __virt_addr_valid+0x102/0x340 [ 30.628815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.629428] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.630040] kasan_report+0xbe/0xf0 [ 30.630509] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.631121] vma_interval_tree_remove+0xc75/0xec0 [ 30.631715] vma_prepare+0xc54/0x11a0 [ 30.632187] __split_vma+0x5af/0x950 [ 30.632652] ? __pfx___split_vma+0x10/0x10 [ 30.633170] ? find_held_lock+0x2c/0x110 [ 30.633707] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.634266] ? lock_is_held_type+0x9f/0x120 [ 30.634799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.635391] ? mtree_range_walk+0x632/0x900 [ 30.635939] ? mas_walk+0x5c7/0x7c0 [ 30.636413] do_vmi_munmap+0x1f1/0x2b0 [ 30.636896] mmap_region+0x1f9/0x2660 [ 30.637376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.637879] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.638596] ? __pfx_lock_acquire+0x10/0x10 [ 30.639119] ? __pfx_mmap_region+0x10/0x10 [ 30.639639] ? security_mmap_addr+0x7d/0xa0 [ 30.640161] ? get_unmapped_area+0x1f5/0x3f0 [ 30.640714] do_mmap+0x854/0xf00 [ 30.641146] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.641640] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.642198] ksys_mmap_pgoff+0x3af/0x500 [ 30.642705] do_syscall_64+0x3f/0x90 [ 30.643182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.643819] RIP: 0033:0x7fc0e8d42d82 [ 30.644272] 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 [ 30.646379] RSP: 002b:00007fff59884028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.647280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0e8d42d82 [ 30.648117] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0e817c000 [ 30.648945] RBP: 00007fc0e817c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.649776] R10: 0000000000000812 R11: 0000000000000206 R12: 000056410bff1b20 [ 30.650607] R13: 00007fff59884040 R14: 00007fff59884070 R15: 00007fff598843d0 [ 30.651451] [ 30.651746] [ 30.651962] Allocated by task 210: [ 30.652387] kasan_save_stack+0x22/0x50 [ 30.652890] kasan_set_track+0x25/0x30 [ 30.653395] __kasan_slab_alloc+0x59/0x70 [ 30.653916] kmem_cache_alloc+0x16b/0x370 [ 30.654429] vm_area_dup+0x20/0x160 [ 30.654879] __split_vma+0x170/0x950 [ 30.655339] split_vma+0xc6/0x110 [ 30.655778] mprotect_fixup+0x8d2/0xb30 [ 30.656276] do_mprotect_pkey+0x87e/0xd40 [ 30.656790] __x64_sys_mprotect+0x78/0xc0 [ 30.657315] do_syscall_64+0x3f/0x90 [ 30.657790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658422] [ 30.658639] Freed by task 210: [ 30.659025] kasan_save_stack+0x22/0x50 [ 30.659515] kasan_set_track+0x25/0x30 [ 30.660007] kasan_save_free_info+0x2b/0x50 [ 30.660524] __kasan_slab_free+0x10a/0x190 [ 30.661044] kmem_cache_free+0x10d/0x4d0 [ 30.661550] rcu_core+0x8c8/0x2860 [ 30.661983] __do_softirq+0x1b7/0x7d4 [ 30.662447] [ 30.662657] Last potentially related work creation: [ 30.663229] kasan_save_stack+0x22/0x50 [ 30.663718] __kasan_record_aux_stack+0x8e/0xa0 [ 30.664285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.664915] remove_vma+0x139/0x170 [ 30.665368] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.665915] do_vmi_munmap+0x1f1/0x2b0 [ 30.666387] __vm_munmap+0x138/0x3a0 [ 30.666847] __x64_sys_munmap+0x59/0x80 [ 30.667336] do_syscall_64+0x3f/0x90 [ 30.667804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.668435] [ 30.668650] Second to last potentially related work creation: [ 30.669318] kasan_save_stack+0x22/0x50 [ 30.669812] __kasan_record_aux_stack+0x8e/0xa0 [ 30.670368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.671000] remove_vma+0x139/0x170 [ 30.671438] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.671986] do_vmi_munmap+0x1f1/0x2b0 [ 30.672464] __vm_munmap+0x138/0x3a0 [ 30.672923] elf_map+0x26f/0x310 [ 30.673385] load_elf_binary+0xd82/0x5030 [ 30.673896] bprm_execve+0x803/0x1940 [ 30.674357] do_execveat_common+0x734/0x8e0 [ 30.674877] __x64_sys_execve+0x93/0xc0 [ 30.675357] do_syscall_64+0x3f/0x90 [ 30.675819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676446] [ 30.676657] The buggy address belongs to the object at ffff88800e2d0d98 [ 30.676657] which belongs to the cache vm_area_struct of size 168 [ 30.678096] The buggy address is located 88 bytes inside of [ 30.678096] freed 168-byte region [ffff88800e2d0d98, ffff88800e2d0e40) [ 30.679479] [ 30.679693] The buggy address belongs to the physical page: [ 30.680339] page:000000006547e554 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2d0 [ 30.681396] memcg:ffff88800ef70a01 [ 30.681811] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.682443] page_type: 0xffffffff() [ 30.682879] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c500 dead000000000006 [ 30.683767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef70a01 [ 30.684657] page dumped because: kasan: bad access detected [ 30.685320] [ 30.685528] Memory state around the buggy address: [ 30.686096] ffff88800e2d0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.686934] ffff88800e2d0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.687764] >ffff88800e2d0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.688593] ^ [ 30.689374] ffff88800e2d0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.690200] ffff88800e2d0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.691019] ================================================================== [ 30.692029] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.849349] BUG: Bad rss-counter state mm:00000000e0c47b35 type:MM_FILEPAGES val:33 [ 32.850302] BUG: Bad rss-counter state mm:00000000e0c47b35 type:MM_ANONPAGES val:22 [ 33.313813] BUG: Bad rss-counter state mm:00000000c3641d74 type:MM_FILEPAGES val:33 [ 33.314893] BUG: Bad rss-counter state mm:00000000c3641d74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47871' (ECDSA) to the list of known hosts. 2023/06/20 23:15:33 fuzzer started 2023/06/20 23:15:33 dialing manager at localhost:36067 2023/06/20 23:15:33 checking machine... 2023/06/20 23:15:33 checking revisions... [ 34.027759] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:15:33 testing simple program... [ 34.071925] cgroup: Unknown subsys name 'net' [ 34.124226] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:15:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86139744 RDX=1ffff1100205bf49 RSI=1ffff1100205bf48 RDI=1ffff1100205bf48 RBP=ffff8880102dfa40 RSP=ffff8880102df978 R8 =ffffffff86139748 R9 =ffff8880102dfa28 R10=0000000000038001 R11=0000000000020f03 R12=ffff8880102dfa48 R13=ffff8880102dfa30 R14=ffff8880102dfd58 R15=ffff8880102df9e8 RIP=ffffffff811310ce 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 00007f9538509900 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=00007f9537a28038 CR3=000000000d6b6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=571c5ea8882916c000000000000ae988 XMM05=2936c5f324c9d7bb0000000000133dc0 XMM06=bdf2e299e47b49d50000000000132840 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100149a413 RBX=ffff88800a4d2068 RCX=ffffffff812e0135 RDX=dffffc0000000000 RSI=ffff88800e5b2950 RDI=ffff88800a4d2098 RBP=ffff888010617798 RSP=ffff88800fb2fc68 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800e5b2780 R13=0000000000000000 R14=ffff88801bf84508 R15=ffff88801bf844c0 RIP=ffffffff8184767e 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 00007f50de12a900 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=00007ffe43625000 CR3=0000000018cf2000 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