[ 25.959578] BUG: Bad rss-counter state mm:00000000241c9905 type:MM_FILEPAGES val:33 [ 25.960837] BUG: Bad rss-counter state mm:00000000241c9905 type:MM_ANONPAGES val:22 [ 26.108745] ================================================================== [ 26.109685] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.110634] Read of size 8 at addr ffff88800c69a798 by task sshd/220 [ 26.111406] [ 26.111628] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.112744] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.113729] Call Trace: [ 26.114054] [ 26.114358] dump_stack_lvl+0x91/0xf0 [ 26.114847] print_report+0xcc/0x620 [ 26.115333] ? __virt_addr_valid+0x102/0x340 [ 26.115889] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.116505] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.117132] kasan_report+0xbe/0xf0 [ 26.117616] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.118271] vma_interval_tree_remove+0xc75/0xec0 [ 26.118883] vma_prepare+0xc54/0x11a0 [ 26.119365] __split_vma+0x5af/0x950 [ 26.119836] ? __pfx___split_vma+0x10/0x10 [ 26.120368] ? find_held_lock+0x2c/0x110 [ 26.120894] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.121457] ? lock_is_held_type+0x9f/0x120 [ 26.122007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.122616] ? mtree_range_walk+0x632/0x900 [ 26.123168] ? mas_walk+0x5c7/0x7c0 [ 26.123642] do_vmi_munmap+0x1f1/0x2b0 [ 26.124140] mmap_region+0x1f9/0x2660 [ 26.124621] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.125137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.125904] ? __pfx_lock_acquire+0x10/0x10 [ 26.126436] ? __pfx_mmap_region+0x10/0x10 [ 26.126972] ? security_mmap_addr+0x7d/0xa0 [ 26.127507] ? get_unmapped_area+0x1f5/0x3f0 [ 26.128061] do_mmap+0x854/0xf00 [ 26.128502] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.129000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.129568] ksys_mmap_pgoff+0x3af/0x500 [ 26.130094] do_syscall_64+0x3f/0x90 [ 26.130575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.131224] RIP: 0033:0x7fd065b79d82 [ 26.131684] 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 [ 26.133828] RSP: 002b:00007ffd0bb52f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.134743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd065b79d82 [ 26.135589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd064fb3000 [ 26.136435] RBP: 00007fd064fb3000 R08: 0000000000000009 R09: 0000000000001000 [ 26.137282] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0f016bec0 [ 26.138162] R13: 00007ffd0bb52f20 R14: 00007ffd0bb52f50 R15: 00007ffd0bb532b0 [ 26.139027] [ 26.139325] [ 26.139542] Allocated by task 212: [ 26.139974] kasan_save_stack+0x22/0x50 [ 26.140481] kasan_set_track+0x25/0x30 [ 26.140984] __kasan_slab_alloc+0x59/0x70 [ 26.141510] kmem_cache_alloc+0x16b/0x370 [ 26.142032] vm_area_dup+0x20/0x160 [ 26.142490] __split_vma+0x170/0x950 [ 26.142958] split_vma+0xc6/0x110 [ 26.143401] mprotect_fixup+0x8d2/0xb30 [ 26.143910] do_mprotect_pkey+0x87e/0xd40 [ 26.144437] __x64_sys_mprotect+0x78/0xc0 [ 26.144959] do_syscall_64+0x3f/0x90 [ 26.145435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.146090] [ 26.146305] Freed by task 212: [ 26.146697] kasan_save_stack+0x22/0x50 [ 26.147201] kasan_set_track+0x25/0x30 [ 26.147696] kasan_save_free_info+0x2b/0x50 [ 26.148230] __kasan_slab_free+0x10a/0x190 [ 26.148764] kmem_cache_free+0x10d/0x4d0 [ 26.149273] rcu_core+0x8c8/0x2860 [ 26.149739] __do_softirq+0x1b7/0x7d4 [ 26.150220] [ 26.150438] Last potentially related work creation: [ 26.151033] kasan_save_stack+0x22/0x50 [ 26.151547] __kasan_record_aux_stack+0x8e/0xa0 [ 26.152120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.152762] remove_vma+0x139/0x170 [ 26.153215] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.153783] do_vmi_munmap+0x1f1/0x2b0 [ 26.154273] __vm_munmap+0x138/0x3a0 [ 26.154744] __x64_sys_munmap+0x59/0x80 [ 26.155247] do_syscall_64+0x3f/0x90 [ 26.155725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.156371] [ 26.156588] The buggy address belongs to the object at ffff88800c69a740 [ 26.156588] which belongs to the cache vm_area_struct of size 168 [ 26.158072] The buggy address is located 88 bytes inside of [ 26.158072] freed 168-byte region [ffff88800c69a740, ffff88800c69a7e8) [ 26.159493] [ 26.159715] The buggy address belongs to the physical page: [ 26.160386] page:0000000001922d1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc69a [ 26.161491] memcg:ffff88800ec78e01 [ 26.161944] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.162606] page_type: 0xffffffff() [ 26.163061] raw: 0100000000000200 ffff88800879fc80 ffffea0000353100 dead000000000002 [ 26.164012] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec78e01 [ 26.164939] page dumped because: kasan: bad access detected [ 26.165614] [ 26.165860] Memory state around the buggy address: [ 26.166442] ffff88800c69a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.167314] ffff88800c69a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.168179] >ffff88800c69a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.169047] ^ [ 26.169572] ffff88800c69a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.170493] ffff88800c69a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.171394] ================================================================== [ 26.172595] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.091602] BUG: Bad rss-counter state mm:000000008c000a5f type:MM_FILEPAGES val:33 [ 28.092576] BUG: Bad rss-counter state mm:000000008c000a5f type:MM_ANONPAGES val:22 [ 28.576102] BUG: Bad rss-counter state mm:000000009aa28a12 type:MM_FILEPAGES val:33 [ 28.577714] BUG: Bad rss-counter state mm:000000009aa28a12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57410' (ECDSA) to the list of known hosts. 2023/06/19 21:28:34 fuzzer started 2023/06/19 21:28:34 dialing manager at localhost:44161 2023/06/19 21:28:34 checking machine... 2023/06/19 21:28:34 checking revisions... [ 29.278413] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:28:34 testing simple program... [ 29.329032] cgroup: Unknown subsys name 'net' [ 29.399343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:28:32 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=00007f4ae68d9000 CR3=000000000f30e000 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=cc6274ad877daa870843503164e0c3f9 XMM02=00000000001201f0eff9b2d0a8fce9cb XMM03=00000000001202c02c67c8bc2e329bc3 XMM04=9a519190178bd67700000000000ae988 XMM05=19e9129bd510f2350000000000133780 XMM06=8c60733b2fa61d7b0000000000132958 XMM07=e042d86d42eb936e0000000000124178 XMM08=b67cf1970605739200000000001202c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffff88800e0bcb80 RCX=0000000000000000 RDX=1ffff11002833ab5 RSI=ffffffff81f07e20 RDI=ffff88801419d5a8 RBP=ffff88801419d400 RSP=ffff88801c607a58 R8 =ffff88801c607a30 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000008000 R13=ffff88801419d400 R14=0000000000000000 R15=ffff88801c607df0 RIP=ffffffff8450bdca RFL=00000282 [--S----] 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 00007f3c96bdf900 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=00007ffcd8e9b000 CR3=00000000142d6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000