[ 23.969832] BUG: Bad rss-counter state mm:00000000ee0e5e54 type:MM_FILEPAGES val:33 [ 23.970877] BUG: Bad rss-counter state mm:00000000ee0e5e54 type:MM_ANONPAGES val:22 [ 24.132140] ================================================================== [ 24.133266] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.134407] Read of size 8 at addr ffff88800efceb38 by task sshd/219 [ 24.135491] [ 24.135720] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.136604] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.137640] Call Trace: [ 24.137974] [ 24.138262] dump_stack_lvl+0x91/0xf0 [ 24.138773] print_report+0xcc/0x620 [ 24.139286] ? __virt_addr_valid+0x102/0x340 [ 24.139861] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.140499] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.141141] kasan_report+0xbe/0xf0 [ 24.141632] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.142267] vma_interval_tree_remove+0xc75/0xec0 [ 24.142888] vma_prepare+0xc54/0x11a0 [ 24.143412] __split_vma+0x5af/0x950 [ 24.143900] ? __pfx___split_vma+0x10/0x10 [ 24.144441] ? find_held_lock+0x2c/0x110 [ 24.144989] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.145583] ? lock_is_held_type+0x9f/0x120 [ 24.146149] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.146786] ? mtree_range_walk+0x632/0x900 [ 24.147381] ? mas_walk+0x5c7/0x7c0 [ 24.147868] do_vmi_munmap+0x1f1/0x2b0 [ 24.148380] mmap_region+0x1f9/0x2660 [ 24.148877] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.149411] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.150154] ? __pfx_lock_acquire+0x10/0x10 [ 24.150703] ? __pfx_mmap_region+0x10/0x10 [ 24.151264] ? security_mmap_addr+0x7d/0xa0 [ 24.151819] ? get_unmapped_area+0x1f5/0x3f0 [ 24.152388] do_mmap+0x854/0xf00 [ 24.152851] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.153374] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.153966] ksys_mmap_pgoff+0x3af/0x500 [ 24.154487] do_syscall_64+0x3f/0x90 [ 24.154982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.155671] RIP: 0033:0x7ff19001dd82 [ 24.156143] 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 [ 24.158370] RSP: 002b:00007fffd3598b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.159331] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff19001dd82 [ 24.160207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff18f457000 [ 24.161092] RBP: 00007ff18f457000 R08: 0000000000000009 R09: 0000000000001000 [ 24.161979] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591a2996d90 [ 24.162868] R13: 00007fffd3598b70 R14: 00007fffd3598ba0 R15: 00007fffd3598f00 [ 24.163777] [ 24.164076] [ 24.164301] Allocated by task 212: [ 24.164744] kasan_save_stack+0x22/0x50 [ 24.165265] kasan_set_track+0x25/0x30 [ 24.165781] __kasan_slab_alloc+0x59/0x70 [ 24.166334] kmem_cache_alloc+0x16b/0x370 [ 24.166880] vm_area_dup+0x20/0x160 [ 24.167371] __split_vma+0x170/0x950 [ 24.167848] split_vma+0xc6/0x110 [ 24.168310] mprotect_fixup+0x8d2/0xb30 [ 24.168833] do_mprotect_pkey+0x87e/0xd40 [ 24.169383] __x64_sys_mprotect+0x78/0xc0 [ 24.169932] do_syscall_64+0x3f/0x90 [ 24.170428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.171107] [ 24.171330] Freed by task 203: [ 24.171744] kasan_save_stack+0x22/0x50 [ 24.172273] kasan_set_track+0x25/0x30 [ 24.172798] kasan_save_free_info+0x2b/0x50 [ 24.173360] __kasan_slab_free+0x10a/0x190 [ 24.173920] kmem_cache_free+0x10d/0x4d0 [ 24.174452] rcu_core+0x8c8/0x2860 [ 24.174917] __do_softirq+0x1b7/0x7d4 [ 24.175416] [ 24.175628] Last potentially related work creation: [ 24.176276] kasan_save_stack+0x22/0x50 [ 24.176780] __kasan_record_aux_stack+0x8e/0xa0 [ 24.177363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.178011] remove_vma+0x139/0x170 [ 24.178466] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.179031] do_vmi_munmap+0x1f1/0x2b0 [ 24.179514] __vm_munmap+0x138/0x3a0 [ 24.179981] __x64_sys_munmap+0x59/0x80 [ 24.180478] do_syscall_64+0x3f/0x90 [ 24.180957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.181599] [ 24.181811] Second to last potentially related work creation: [ 24.182487] kasan_save_stack+0x22/0x50 [ 24.182985] __kasan_record_aux_stack+0x8e/0xa0 [ 24.183581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.184219] remove_vma+0x139/0x170 [ 24.184670] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.185224] do_vmi_munmap+0x1f1/0x2b0 [ 24.185703] mmap_region+0x1f9/0x2660 [ 24.186175] do_mmap+0x854/0xf00 [ 24.186604] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.187091] ksys_mmap_pgoff+0x3af/0x500 [ 24.187591] do_syscall_64+0x3f/0x90 [ 24.188059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.188705] [ 24.188918] The buggy address belongs to the object at ffff88800efceae0 [ 24.188918] which belongs to the cache vm_area_struct of size 168 [ 24.190363] The buggy address is located 88 bytes inside of [ 24.190363] freed 168-byte region [ffff88800efceae0, ffff88800efceb88) [ 24.191757] [ 24.191971] The buggy address belongs to the physical page: [ 24.192627] page:0000000033c24dca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefce [ 24.193697] memcg:ffff88800dc8d201 [ 24.194124] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.194811] page_type: 0xffffffff() [ 24.195268] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b2040 dead000000000003 [ 24.196177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc8d201 [ 24.197065] page dumped because: kasan: bad access detected [ 24.197717] [ 24.197930] Memory state around the buggy address: [ 24.198500] ffff88800efcea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.199345] ffff88800efcea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.200192] >ffff88800efceb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.201035] ^ [ 24.201642] ffff88800efceb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.202479] ffff88800efcec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.203335] ================================================================== [ 24.204256] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.613737] BUG: Bad rss-counter state mm:000000002c6639f9 type:MM_FILEPAGES val:33 [ 26.614714] BUG: Bad rss-counter state mm:000000002c6639f9 type:MM_ANONPAGES val:22 [ 27.168075] BUG: Bad rss-counter state mm:0000000009a997b9 type:MM_FILEPAGES val:33 [ 27.169065] BUG: Bad rss-counter state mm:0000000009a997b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52456' (ECDSA) to the list of known hosts. 2023/06/21 02:30:49 fuzzer started 2023/06/21 02:30:50 dialing manager at localhost:36067 2023/06/21 02:30:50 checking machine... 2023/06/21 02:30:50 checking revisions... [ 27.904759] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:30:50 testing simple program... [ 27.958331] cgroup: Unknown subsys name 'net' [ 28.020470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:30:49 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffff88800ceb7980 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800ceb7984 RBP=1ffff1100d9c13ab RSP=ffff88806ce09d50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000202 R13=ffff88800ceb79c0 R14=ffffffff813782f8 R15=ffff88800e8b9508 RIP=ffffffff812e009a 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 00007fe78e24f900 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=00007f8aa8e05650 CR3=000000000c608000 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=28474d8c6927ea8d4840b59990b586c0 XMM02=000000000011aad0eff9b2d0a8fce9cb XMM03=000000000011aba02c67c8bc2e329bc3 XMM04=11c54edc9e6205c300000000000ae988 XMM05=c7b5007fae445cbd0000000000133b60 XMM06=806171799158d96700000000001325e0 XMM07=fb795ef6d657705600000000001215c0 XMM08=2c67c8bc2e329bc3000000000011ab40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffd829b5718 CR3=0000000005482000 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=00007f3d003fd510000055d62553f790 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