[ 24.070199] BUG: Bad rss-counter state mm:00000000e54858a6 type:MM_FILEPAGES val:33 [ 24.071386] BUG: Bad rss-counter state mm:00000000e54858a6 type:MM_ANONPAGES val:22 [ 24.217449] ================================================================== [ 24.218312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.219193] Read of size 8 at addr ffff88800dc2bb38 by task sshd/219 [ 24.219915] [ 24.220125] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.221096] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.222024] Call Trace: [ 24.222326] [ 24.222597] dump_stack_lvl+0x91/0xf0 [ 24.223066] print_report+0xcc/0x620 [ 24.223548] ? __virt_addr_valid+0x102/0x340 [ 24.224068] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.224658] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.225237] kasan_report+0xbe/0xf0 [ 24.225684] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.226279] vma_interval_tree_remove+0xc75/0xec0 [ 24.226850] vma_prepare+0xc54/0x11a0 [ 24.227302] __split_vma+0x5af/0x950 [ 24.227748] ? __pfx___split_vma+0x10/0x10 [ 24.228280] ? find_held_lock+0x2c/0x110 [ 24.228791] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.229359] ? lock_is_held_type+0x9f/0x120 [ 24.229900] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.230491] ? mtree_range_walk+0x632/0x900 [ 24.231039] ? mas_walk+0x5c7/0x7c0 [ 24.231502] do_vmi_munmap+0x1f1/0x2b0 [ 24.231987] mmap_region+0x1f9/0x2660 [ 24.232475] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.232987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.233688] ? __pfx_lock_acquire+0x10/0x10 [ 24.234218] ? __pfx_mmap_region+0x10/0x10 [ 24.234745] ? security_mmap_addr+0x7d/0xa0 [ 24.235283] ? get_unmapped_area+0x1f5/0x3f0 [ 24.235827] do_mmap+0x854/0xf00 [ 24.236265] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.236753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.237308] ksys_mmap_pgoff+0x3af/0x500 [ 24.237810] do_syscall_64+0x3f/0x90 [ 24.238282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.238935] RIP: 0033:0x7ffb99d01d82 [ 24.239389] 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 [ 24.241506] RSP: 002b:00007ffefe6aa218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.242398] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb99d01d82 [ 24.243194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb9913b000 [ 24.243990] RBP: 00007ffb9913b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.244791] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1762d9ec0 [ 24.245586] R13: 00007ffefe6aa230 R14: 00007ffefe6aa260 R15: 00007ffefe6aa5c0 [ 24.246386] [ 24.246661] [ 24.246865] Allocated by task 212: [ 24.247268] kasan_save_stack+0x22/0x50 [ 24.247757] kasan_set_track+0x25/0x30 [ 24.248258] __kasan_slab_alloc+0x59/0x70 [ 24.248768] kmem_cache_alloc+0x16b/0x370 [ 24.249286] vm_area_dup+0x20/0x160 [ 24.249724] __split_vma+0x170/0x950 [ 24.250191] split_vma+0xc6/0x110 [ 24.250622] mprotect_fixup+0x8d2/0xb30 [ 24.251122] do_mprotect_pkey+0x87e/0xd40 [ 24.251631] __x64_sys_mprotect+0x78/0xc0 [ 24.252159] do_syscall_64+0x3f/0x90 [ 24.252615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.253221] [ 24.253428] Freed by task 212: [ 24.253797] kasan_save_stack+0x22/0x50 [ 24.254276] kasan_set_track+0x25/0x30 [ 24.254741] kasan_save_free_info+0x2b/0x50 [ 24.255257] __kasan_slab_free+0x10a/0x190 [ 24.255759] kmem_cache_free+0x10d/0x4d0 [ 24.256247] rcu_core+0x8c8/0x2860 [ 24.256668] __do_softirq+0x1b7/0x7d4 [ 24.257129] [ 24.257334] Last potentially related work creation: [ 24.257883] kasan_save_stack+0x22/0x50 [ 24.258359] __kasan_record_aux_stack+0x8e/0xa0 [ 24.258898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.259503] remove_vma+0x139/0x170 [ 24.259929] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.260475] do_vmi_munmap+0x1f1/0x2b0 [ 24.260938] __vm_munmap+0x138/0x3a0 [ 24.261400] __x64_sys_munmap+0x59/0x80 [ 24.261905] do_syscall_64+0x3f/0x90 [ 24.262450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.263096] [ 24.263310] The buggy address belongs to the object at ffff88800dc2bae0 [ 24.263310] which belongs to the cache vm_area_struct of size 168 [ 24.264809] The buggy address is located 88 bytes inside of [ 24.264809] freed 168-byte region [ffff88800dc2bae0, ffff88800dc2bb88) [ 24.266223] [ 24.266437] The buggy address belongs to the physical page: [ 24.267089] page:000000002f072153 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc2b [ 24.268178] memcg:ffff88800e7a1c01 [ 24.268607] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.269301] page_type: 0xffffffff() [ 24.269745] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.270677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7a1c01 [ 24.271589] page dumped because: kasan: bad access detected [ 24.272252] [ 24.272462] Memory state around the buggy address: [ 24.273044] ffff88800dc2ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.273908] ffff88800dc2ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.274752] >ffff88800dc2bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.275596] ^ [ 24.276219] ffff88800dc2bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.277067] ffff88800dc2bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.277916] ================================================================== [ 24.278829] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.846438] BUG: Bad rss-counter state mm:00000000bbb0e8b8 type:MM_FILEPAGES val:33 [ 26.847436] BUG: Bad rss-counter state mm:00000000bbb0e8b8 type:MM_ANONPAGES val:22 [ 27.376814] BUG: Bad rss-counter state mm:00000000e3b5bbdd type:MM_FILEPAGES val:33 [ 27.378001] BUG: Bad rss-counter state mm:00000000e3b5bbdd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56476' (ECDSA) to the list of known hosts. 2023/06/21 08:48:43 fuzzer started 2023/06/21 08:48:43 dialing manager at localhost:36067 2023/06/21 08:48:43 checking machine... 2023/06/21 08:48:43 checking revisions... [ 28.168162] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:48:43 testing simple program... [ 28.215299] cgroup: Unknown subsys name 'net' [ 28.254419] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:48:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffcda10ae78 CR3=0000000005482000 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=00007f88082dd510000055d7f1e4c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864bbb59 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019f5f2b0 RSP=ffff888019f5f1e8 R8 =ffffffff864bbb58 R9 =ffff888019f5f298 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888019f5f2b8 R13=ffff888019f5f2a0 R14=ffff888019f5f299 R15=ffff888019f5f258 RIP=ffffffff81130abf 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 00007f91bf0df900 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=00007f91bf696618 CR3=0000000009896000 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=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