[ 31.235522] BUG: Bad rss-counter state mm:00000000b3f8576a type:MM_FILEPAGES val:33 [ 31.237263] BUG: Bad rss-counter state mm:00000000b3f8576a type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.402600] ================================================================== [ 31.403531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.404501] Read of size 8 at addr ffff888016cefdf0 by task sshd/226 [ 31.405284] [ 31.405627] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.406526] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.407534] Call Trace: [ 31.407875] [ 31.408169] dump_stack_lvl+0x91/0xf0 [ 31.408702] print_report+0xcc/0x620 [ 31.409195] ? __virt_addr_valid+0x102/0x340 [ 31.409751] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.410392] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.411016] kasan_report+0xbe/0xf0 [ 31.411501] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.412138] vma_interval_tree_remove+0xc75/0xec0 [ 31.412765] vma_prepare+0xc54/0x11a0 [ 31.413251] __split_vma+0x5af/0x950 [ 31.413730] ? __pfx___split_vma+0x10/0x10 [ 31.414268] ? find_held_lock+0x2c/0x110 [ 31.414796] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.415361] ? lock_is_held_type+0x9f/0x120 [ 31.415900] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.416522] ? mtree_range_walk+0x632/0x900 [ 31.417079] ? mas_walk+0x5c7/0x7c0 [ 31.417564] do_vmi_munmap+0x1f1/0x2b0 [ 31.418062] mmap_region+0x1f9/0x2660 [ 31.418549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.419072] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.419792] ? __pfx_lock_acquire+0x10/0x10 [ 31.420331] ? __pfx_mmap_region+0x10/0x10 [ 31.420880] ? security_mmap_addr+0x7d/0xa0 [ 31.421409] ? get_unmapped_area+0x1f5/0x3f0 [ 31.421960] do_mmap+0x854/0xf00 [ 31.422406] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.422908] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.423480] ksys_mmap_pgoff+0x3af/0x500 [ 31.423993] do_syscall_64+0x3f/0x90 [ 31.424482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.425130] RIP: 0033:0x7f026e086d82 [ 31.425598] 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 [ 31.427728] RSP: 002b:00007ffdef05fab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.428647] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f026e086d82 [ 31.429488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f026d4c0000 [ 31.430334] RBP: 00007f026d4c0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.431176] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb77280b20 [ 31.432018] R13: 00007ffdef05fad0 R14: 00007ffdef05fb00 R15: 00007ffdef05fe60 [ 31.432887] [ 31.433182] [ 31.433397] Allocated by task 219: [ 31.433825] kasan_save_stack+0x22/0x50 [ 31.434336] kasan_set_track+0x25/0x30 [ 31.434828] __kasan_slab_alloc+0x59/0x70 [ 31.435355] kmem_cache_alloc+0x16b/0x370 [ 31.435874] vm_area_dup+0x20/0x160 [ 31.436333] __split_vma+0x170/0x950 [ 31.436810] split_vma+0xc6/0x110 [ 31.437259] mprotect_fixup+0x8d2/0xb30 [ 31.437757] do_mprotect_pkey+0x87e/0xd40 [ 31.438282] __x64_sys_mprotect+0x78/0xc0 [ 31.438808] do_syscall_64+0x3f/0x90 [ 31.439284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439926] [ 31.440146] Freed by task 219: [ 31.440564] kasan_save_stack+0x22/0x50 [ 31.441066] kasan_set_track+0x25/0x30 [ 31.441567] kasan_save_free_info+0x2b/0x50 [ 31.442108] __kasan_slab_free+0x10a/0x190 [ 31.442640] kmem_cache_free+0x10d/0x4d0 [ 31.443146] rcu_core+0x8c8/0x2860 [ 31.443587] __do_softirq+0x1b7/0x7d4 [ 31.444065] [ 31.444280] Last potentially related work creation: [ 31.444872] kasan_save_stack+0x22/0x50 [ 31.445378] __kasan_record_aux_stack+0x8e/0xa0 [ 31.445951] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.446595] remove_vma+0x139/0x170 [ 31.447098] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.447653] do_vmi_munmap+0x1f1/0x2b0 [ 31.448146] __vm_munmap+0x138/0x3a0 [ 31.448640] __x64_sys_munmap+0x59/0x80 [ 31.449142] do_syscall_64+0x3f/0x90 [ 31.449616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.450264] [ 31.450481] The buggy address belongs to the object at ffff888016cefd98 [ 31.450481] which belongs to the cache vm_area_struct of size 168 [ 31.451953] The buggy address is located 88 bytes inside of [ 31.451953] freed 168-byte region [ffff888016cefd98, ffff888016cefe40) [ 31.453361] [ 31.453575] The buggy address belongs to the physical page: [ 31.454229] page:00000000229c24f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cef [ 31.455316] memcg:ffff88800e042401 [ 31.455743] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.456392] page_type: 0xffffffff() [ 31.456851] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.457767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e042401 [ 31.458666] page dumped because: kasan: bad access detected [ 31.459325] [ 31.459541] Memory state around the buggy address: [ 31.460119] ffff888016cefc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.461006] ffff888016cefd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.461864] >ffff888016cefd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.462722] ^ [ 31.463547] ffff888016cefe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.464422] ffff888016cefe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.465293] ================================================================== [ 31.466235] Disabling lock debugging due to kernel taint [ 33.442871] BUG: Bad rss-counter state mm:00000000075bf7de type:MM_FILEPAGES val:33 [ 33.443854] BUG: Bad rss-counter state mm:00000000075bf7de type:MM_ANONPAGES val:22 [ 33.956378] BUG: Bad rss-counter state mm:000000000a692511 type:MM_FILEPAGES val:33 [ 33.957607] BUG: Bad rss-counter state mm:000000000a692511 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44305' (ECDSA) to the list of known hosts. 2023/06/21 07:36:15 fuzzer started 2023/06/21 07:36:15 dialing manager at localhost:36067 2023/06/21 07:36:15 checking machine... 2023/06/21 07:36:15 checking revisions... [ 34.705363] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:36:15 testing simple program... [ 34.748887] cgroup: Unknown subsys name 'net' [ 34.801662] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:36:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86607000 RCX=ffffffff81007b82 RDX=ffffffff8542a6c0 RSI=ffffffff86607000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d06d410 RIP=ffffffff814c0438 RFL=00000286 [--S--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 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=00007ffd703b4b58 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=00007fbb3f8c9510000056432770e790 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=0000000000000058 RBX=ffff88800b820000 RCX=0000000000000000 RDX=0000000000010177 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800b8200b8 RSP=ffff888008f37c80 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010177 R11=0000000000000000 R12=0000000000010177 R13=ffff88800b820000 R14=ffffed1001704001 R15=ffffffff85a23960 RIP=ffffffff8219168f RFL=00000093 [--S-A-C] 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 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=00007fc088ad7650 CR3=0000000016c04000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000