[ 31.266853] BUG: Bad rss-counter state mm:00000000d090ccda type:MM_FILEPAGES val:33 [ 31.268193] BUG: Bad rss-counter state mm:00000000d090ccda type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.421684] ================================================================== [ 31.422645] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.423645] Read of size 8 at addr ffff888014783310 by task sshd/218 [ 31.424424] [ 31.424646] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.425512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.426501] Call Trace: [ 31.426824] [ 31.427112] dump_stack_lvl+0x91/0xf0 [ 31.427619] print_report+0xcc/0x620 [ 31.428106] ? __virt_addr_valid+0x102/0x340 [ 31.428661] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.429277] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.429888] kasan_report+0xbe/0xf0 [ 31.430359] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.430990] vma_interval_tree_remove+0xc75/0xec0 [ 31.431624] vma_prepare+0xc54/0x11a0 [ 31.432112] __split_vma+0x5af/0x950 [ 31.432605] ? __pfx___split_vma+0x10/0x10 [ 31.433158] ? find_held_lock+0x2c/0x110 [ 31.433696] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.434280] ? lock_is_held_type+0x9f/0x120 [ 31.434840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.435496] ? mtree_range_walk+0x632/0x900 [ 31.436070] ? mas_walk+0x5c7/0x7c0 [ 31.436567] do_vmi_munmap+0x1f1/0x2b0 [ 31.437075] mmap_region+0x1f9/0x2660 [ 31.437577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.438105] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.438844] ? __pfx_lock_acquire+0x10/0x10 [ 31.439409] ? __pfx_mmap_region+0x10/0x10 [ 31.439965] ? security_mmap_addr+0x7d/0xa0 [ 31.440515] ? get_unmapped_area+0x1f5/0x3f0 [ 31.441088] do_mmap+0x854/0xf00 [ 31.441539] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.442055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.442641] ksys_mmap_pgoff+0x3af/0x500 [ 31.443162] do_syscall_64+0x3f/0x90 [ 31.443678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.444356] RIP: 0033:0x7f413a524d82 [ 31.444833] 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 [ 31.447042] RSP: 002b:00007ffdc91a3e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.447982] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f413a524d82 [ 31.448864] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f413995e000 [ 31.449753] RBP: 00007f413995e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.450635] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc07e56b20 [ 31.451536] R13: 00007ffdc91a3ea0 R14: 00007ffdc91a3ed0 R15: 00007ffdc91a4230 [ 31.452435] [ 31.452739] [ 31.452963] Allocated by task 211: [ 31.453403] kasan_save_stack+0x22/0x50 [ 31.453922] kasan_set_track+0x25/0x30 [ 31.454436] __kasan_slab_alloc+0x59/0x70 [ 31.454982] kmem_cache_alloc+0x16b/0x370 [ 31.455536] vm_area_dup+0x20/0x160 [ 31.456009] __split_vma+0x170/0x950 [ 31.456499] split_vma+0xc6/0x110 [ 31.456953] mprotect_fixup+0x8d2/0xb30 [ 31.457474] do_mprotect_pkey+0x87e/0xd40 [ 31.458014] __x64_sys_mprotect+0x78/0xc0 [ 31.458557] do_syscall_64+0x3f/0x90 [ 31.459052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.459711] [ 31.459933] Freed by task 211: [ 31.460338] kasan_save_stack+0x22/0x50 [ 31.460859] kasan_set_track+0x25/0x30 [ 31.461366] kasan_save_free_info+0x2b/0x50 [ 31.461921] __kasan_slab_free+0x10a/0x190 [ 31.462475] kmem_cache_free+0x10d/0x4d0 [ 31.462999] rcu_core+0x8c8/0x2860 [ 31.463483] __do_softirq+0x1b7/0x7d4 [ 31.463983] [ 31.464202] Last potentially related work creation: [ 31.464822] kasan_save_stack+0x22/0x50 [ 31.465342] __kasan_record_aux_stack+0x8e/0xa0 [ 31.465941] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.466613] remove_vma+0x139/0x170 [ 31.467081] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.467668] do_vmi_munmap+0x1f1/0x2b0 [ 31.468171] __vm_munmap+0x138/0x3a0 [ 31.468659] __x64_sys_munmap+0x59/0x80 [ 31.469182] do_syscall_64+0x3f/0x90 [ 31.469671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.470340] [ 31.470561] The buggy address belongs to the object at ffff8880147832b8 [ 31.470561] which belongs to the cache vm_area_struct of size 168 [ 31.472110] The buggy address is located 88 bytes inside of [ 31.472110] freed 168-byte region [ffff8880147832b8, ffff888014783360) [ 31.473584] [ 31.473805] The buggy address belongs to the physical page: [ 31.474495] page:00000000b175da00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14783 [ 31.475647] memcg:ffff88800c5c7801 [ 31.476094] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.476823] page_type: 0xffffffff() [ 31.477292] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.478246] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5c7801 [ 31.479196] page dumped because: kasan: bad access detected [ 31.479894] [ 31.480115] Memory state around the buggy address: [ 31.480711] ffff888014783200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.481604] ffff888014783280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.482491] >ffff888014783300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.483388] ^ [ 31.483870] ffff888014783380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.484758] ffff888014783400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.485641] ================================================================== [ 31.486916] Disabling lock debugging due to kernel taint [ 34.291083] BUG: Bad rss-counter state mm:00000000b7d66d2b type:MM_FILEPAGES val:33 [ 34.292180] BUG: Bad rss-counter state mm:00000000b7d66d2b type:MM_ANONPAGES val:22 [ 34.752705] BUG: Bad rss-counter state mm:000000006826cb5a type:MM_FILEPAGES val:33 [ 34.753383] BUG: Bad rss-counter state mm:000000006826cb5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24597' (ECDSA) to the list of known hosts. 2023/06/21 09:24:42 fuzzer started 2023/06/21 09:24:43 dialing manager at localhost:36067 2023/06/21 09:24:43 checking machine... 2023/06/21 09:24:43 checking revisions... [ 35.347480] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:24:43 testing simple program... [ 35.386559] cgroup: Unknown subsys name 'net' [ 35.452622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:24:42 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800c543be0 RCX=ffffffff81846775 RDX=ffffed10018a878f RSI=0000000000000004 RDI=ffff88800c543c70 RBP=ffff8880162efaa0 RSP=ffff8880162efa20 R8 =0000000000000001 R9 =ffffed10018a878e R10=ffff88800c543c73 R11=00000000000b6a61 R12=ffff88800d751800 R13=0000000000000000 R14=0000000000000000 R15=ffff8880084c6140 RIP=ffffffff8184677c 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 00007fb37ca7b900 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=00007fb37ca5a020 CR3=000000000e4f0000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f3bf4d40000 CR3=000000000d85e000 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=2032343a34323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a34323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000