[ 29.112602] BUG: Bad rss-counter state mm:00000000b34160e4 type:MM_FILEPAGES val:33 [ 29.113601] BUG: Bad rss-counter state mm:00000000b34160e4 type:MM_ANONPAGES val:22 [ 29.274404] ================================================================== [ 29.275475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.276573] Read of size 8 at addr ffff88800ebca6b0 by task sshd/219 [ 29.277426] [ 29.277650] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.278516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.279534] Call Trace: [ 29.279874] [ 29.280162] dump_stack_lvl+0x91/0xf0 [ 29.280649] print_report+0xcc/0x620 [ 29.281141] ? __virt_addr_valid+0x102/0x340 [ 29.281702] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.282315] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.282927] kasan_report+0xbe/0xf0 [ 29.283408] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.284034] vma_interval_tree_remove+0xc75/0xec0 [ 29.284640] vma_prepare+0xc54/0x11a0 [ 29.285118] __split_vma+0x5af/0x950 [ 29.285586] ? __pfx___split_vma+0x10/0x10 [ 29.286113] ? find_held_lock+0x2c/0x110 [ 29.286630] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.287194] ? lock_is_held_type+0x9f/0x120 [ 29.287733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.288360] ? mtree_range_walk+0x632/0x900 [ 29.288913] ? mas_walk+0x5c7/0x7c0 [ 29.289388] do_vmi_munmap+0x1f1/0x2b0 [ 29.289882] mmap_region+0x1f9/0x2660 [ 29.290362] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.290874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.291586] ? __pfx_lock_acquire+0x10/0x10 [ 29.292136] ? __pfx_mmap_region+0x10/0x10 [ 29.292658] ? security_mmap_addr+0x7d/0xa0 [ 29.293197] ? get_unmapped_area+0x1f5/0x3f0 [ 29.293755] do_mmap+0x854/0xf00 [ 29.294199] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.294704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.295278] ksys_mmap_pgoff+0x3af/0x500 [ 29.295795] do_syscall_64+0x3f/0x90 [ 29.296295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.296951] RIP: 0033:0x7fb1bc468d82 [ 29.297413] 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 [ 29.299531] RSP: 002b:00007fff618c1308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.300445] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1bc468d82 [ 29.301293] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1bb8a2000 [ 29.302134] RBP: 00007fb1bb8a2000 R08: 0000000000000009 R09: 0000000000001000 [ 29.302973] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a078e8fec0 [ 29.303820] R13: 00007fff618c1320 R14: 00007fff618c1350 R15: 00007fff618c16b0 [ 29.304670] [ 29.304965] [ 29.305181] Allocated by task 212: [ 29.305606] kasan_save_stack+0x22/0x50 [ 29.306110] kasan_set_track+0x25/0x30 [ 29.306603] __kasan_slab_alloc+0x59/0x70 [ 29.307131] kmem_cache_alloc+0x16b/0x370 [ 29.307645] vm_area_dup+0x20/0x160 [ 29.308120] __split_vma+0x170/0x950 [ 29.308587] split_vma+0xc6/0x110 [ 29.309023] mprotect_fixup+0x8d2/0xb30 [ 29.309531] do_mprotect_pkey+0x87e/0xd40 [ 29.310053] __x64_sys_mprotect+0x78/0xc0 [ 29.310572] do_syscall_64+0x3f/0x90 [ 29.311048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.311688] [ 29.311916] Freed by task 212: [ 29.312303] kasan_save_stack+0x22/0x50 [ 29.312808] kasan_set_track+0x25/0x30 [ 29.313301] kasan_save_free_info+0x2b/0x50 [ 29.313844] __kasan_slab_free+0x10a/0x190 [ 29.314378] kmem_cache_free+0x10d/0x4d0 [ 29.314897] rcu_core+0x8c8/0x2860 [ 29.315342] __do_softirq+0x1b7/0x7d4 [ 29.315826] [ 29.316040] Last potentially related work creation: [ 29.316625] kasan_save_stack+0x22/0x50 [ 29.317127] __kasan_record_aux_stack+0x8e/0xa0 [ 29.317708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.318350] remove_vma+0x139/0x170 [ 29.318803] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.319359] do_vmi_munmap+0x1f1/0x2b0 [ 29.319863] __vm_munmap+0x138/0x3a0 [ 29.320330] __x64_sys_munmap+0x59/0x80 [ 29.320832] do_syscall_64+0x3f/0x90 [ 29.321306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.321946] [ 29.322167] The buggy address belongs to the object at ffff88800ebca658 [ 29.322167] which belongs to the cache vm_area_struct of size 168 [ 29.323631] The buggy address is located 88 bytes inside of [ 29.323631] freed 168-byte region [ffff88800ebca658, ffff88800ebca700) [ 29.325036] [ 29.325256] The buggy address belongs to the physical page: [ 29.325915] page:000000005a57b148 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebca [ 29.326996] memcg:ffff88800e6dd401 [ 29.327423] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.328138] page_type: 0xffffffff() [ 29.328590] raw: 0100000000000200 ffff88800879fc80 ffffea00003af900 dead000000000005 [ 29.329508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6dd401 [ 29.330405] page dumped because: kasan: bad access detected [ 29.331066] [ 29.331284] Memory state around the buggy address: [ 29.331875] ffff88800ebca580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.332734] ffff88800ebca600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.333595] >ffff88800ebca680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.334446] ^ [ 29.335025] ffff88800ebca700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 29.335885] ffff88800ebca780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.336740] ================================================================== [ 29.337712] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.099608] BUG: Bad rss-counter state mm:00000000596d2ad0 type:MM_FILEPAGES val:33 [ 32.101105] BUG: Bad rss-counter state mm:00000000596d2ad0 type:MM_ANONPAGES val:22 [ 32.550513] BUG: Bad rss-counter state mm:0000000008f4e4a8 type:MM_FILEPAGES val:33 [ 32.551596] BUG: Bad rss-counter state mm:0000000008f4e4a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41298' (ECDSA) to the list of known hosts. 2023/06/19 12:30:28 fuzzer started 2023/06/19 12:30:29 dialing manager at localhost:44161 2023/06/19 12:30:29 checking machine... 2023/06/19 12:30:29 checking revisions... [ 33.320401] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:30:29 testing simple program... [ 33.370281] cgroup: Unknown subsys name 'net' [ 33.413035] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:30:23 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=00007ff23650c000 CR3=000000000cae4000 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=96ab79f7e74c0c87d2488656558f0b40 XMM02=ec2efd57dc4c00df000000000011db90 XMM03=49b45772d00debb8000000000011dc60 XMM04=dfe2def27040a6dd00000000000ae988 XMM05=dfcdbad4f1609c3700000000001336b0 XMM06=806171799158d9670000000000133538 XMM07=e042d86d42eb936e0000000000123d28 XMM08=49b45772d00debb8000000000011dc60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800da3d3f8 RCX=0000000000000000 RDX=1ffff110031b10f3 RSI=ffff88800da3d3f8 RDI=ffff888018d88798 RBP=ffff88800da3d3f8 RSP=ffff88801a0a79b8 R8 =0000000000000001 R9 =ffffed1003414f2f R10=0000000000000003 R11=00000000000b6996 R12=ffff888018d88789 R13=ffff8880094f0d78 R14=ffff888018d88788 R15=ffffffff87b86f80 RIP=ffffffff844cc71a 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 00007f63e88b2900 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=00007f63e8891020 CR3=000000000ebf8000 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=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