[ 31.599377] BUG: Bad rss-counter state mm:00000000853b7861 type:MM_FILEPAGES val:33 [ 31.600856] BUG: Bad rss-counter state mm:00000000853b7861 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.733144] ================================================================== [ 31.734192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.735297] Read of size 8 at addr ffff88800e5405c8 by task sshd/218 [ 31.736379] [ 31.736632] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.737474] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.738448] Call Trace: [ 31.738762] [ 31.739044] dump_stack_lvl+0x91/0xf0 [ 31.739539] print_report+0xcc/0x620 [ 31.740033] ? __virt_addr_valid+0x102/0x340 [ 31.740590] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.741205] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.741817] kasan_report+0xbe/0xf0 [ 31.742285] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.742897] vma_interval_tree_remove+0xc75/0xec0 [ 31.743492] vma_prepare+0xc54/0x11a0 [ 31.743973] __split_vma+0x5af/0x950 [ 31.744467] ? __pfx___split_vma+0x10/0x10 [ 31.744987] ? find_held_lock+0x2c/0x110 [ 31.745501] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.746062] ? lock_is_held_type+0x9f/0x120 [ 31.746597] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.747195] ? mtree_range_walk+0x632/0x900 [ 31.747740] ? mas_walk+0x5c7/0x7c0 [ 31.748224] do_vmi_munmap+0x1f1/0x2b0 [ 31.748711] mmap_region+0x1f9/0x2660 [ 31.749184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.749693] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.750393] ? __pfx_lock_acquire+0x10/0x10 [ 31.750922] ? __pfx_mmap_region+0x10/0x10 [ 31.751441] ? security_mmap_addr+0x7d/0xa0 [ 31.751961] ? get_unmapped_area+0x1f5/0x3f0 [ 31.752516] do_mmap+0x854/0xf00 [ 31.752962] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.753455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.754017] ksys_mmap_pgoff+0x3af/0x500 [ 31.754521] do_syscall_64+0x3f/0x90 [ 31.754993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755630] RIP: 0033:0x7f8b247c3d82 [ 31.756087] 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 [ 31.758175] RSP: 002b:00007ffd6ef9c4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.759072] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b247c3d82 [ 31.759910] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b23bfd000 [ 31.760776] RBP: 00007f8b23bfd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.761609] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f4f3edec0 [ 31.762444] R13: 00007ffd6ef9c500 R14: 00007ffd6ef9c530 R15: 00007ffd6ef9c890 [ 31.763295] [ 31.763591] [ 31.763808] Allocated by task 211: [ 31.764246] kasan_save_stack+0x22/0x50 [ 31.764752] kasan_set_track+0x25/0x30 [ 31.765244] __kasan_slab_alloc+0x59/0x70 [ 31.765770] kmem_cache_alloc+0x16b/0x370 [ 31.766279] vm_area_dup+0x20/0x160 [ 31.766739] __split_vma+0x170/0x950 [ 31.767199] split_vma+0xc6/0x110 [ 31.767639] mprotect_fixup+0x8d2/0xb30 [ 31.768151] do_mprotect_pkey+0x87e/0xd40 [ 31.768671] __x64_sys_mprotect+0x78/0xc0 [ 31.769194] do_syscall_64+0x3f/0x90 [ 31.769667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.770306] [ 31.770524] Freed by task 211: [ 31.770912] kasan_save_stack+0x22/0x50 [ 31.771412] kasan_set_track+0x25/0x30 [ 31.771906] kasan_save_free_info+0x2b/0x50 [ 31.772443] __kasan_slab_free+0x10a/0x190 [ 31.772965] kmem_cache_free+0x10d/0x4d0 [ 31.773473] rcu_core+0x8c8/0x2860 [ 31.773921] __do_softirq+0x1b7/0x7d4 [ 31.774398] [ 31.774613] Last potentially related work creation: [ 31.775196] kasan_save_stack+0x22/0x50 [ 31.775699] __kasan_record_aux_stack+0x8e/0xa0 [ 31.776289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.776927] remove_vma+0x139/0x170 [ 31.777377] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.777928] do_vmi_munmap+0x1f1/0x2b0 [ 31.778414] __vm_munmap+0x138/0x3a0 [ 31.778887] __x64_sys_munmap+0x59/0x80 [ 31.779383] do_syscall_64+0x3f/0x90 [ 31.779861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.780512] [ 31.780726] Second to last potentially related work creation: [ 31.781405] kasan_save_stack+0x22/0x50 [ 31.781911] __kasan_record_aux_stack+0x8e/0xa0 [ 31.782494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.783133] remove_vma+0x139/0x170 [ 31.783590] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.784152] do_vmi_munmap+0x1f1/0x2b0 [ 31.784637] mmap_region+0x1f9/0x2660 [ 31.785116] do_mmap+0x854/0xf00 [ 31.785549] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.786041] ksys_mmap_pgoff+0x7d/0x500 [ 31.786541] do_syscall_64+0x3f/0x90 [ 31.787019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.787659] [ 31.787875] The buggy address belongs to the object at ffff88800e540570 [ 31.787875] which belongs to the cache vm_area_struct of size 168 [ 31.789360] The buggy address is located 88 bytes inside of [ 31.789360] freed 168-byte region [ffff88800e540570, ffff88800e540618) [ 31.790758] [ 31.790972] The buggy address belongs to the physical page: [ 31.791632] page:000000000937e4fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe540 [ 31.792718] memcg:ffff888014007201 [ 31.793143] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.793837] page_type: 0xffffffff() [ 31.794288] raw: 0100000000000200 ffff88800879fc80 ffffea000032acc0 dead000000000005 [ 31.795200] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014007201 [ 31.796105] page dumped because: kasan: bad access detected [ 31.796770] [ 31.796987] Memory state around the buggy address: [ 31.797568] ffff88800e540480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.798428] ffff88800e540500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.799283] >ffff88800e540580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.800152] ^ [ 31.800824] ffff88800e540600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.801687] ffff88800e540680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.802538] ================================================================== [ 31.803669] Disabling lock debugging due to kernel taint [ 34.065054] BUG: Bad rss-counter state mm:00000000622ed600 type:MM_FILEPAGES val:33 [ 34.066261] BUG: Bad rss-counter state mm:00000000622ed600 type:MM_ANONPAGES val:22 [ 34.437569] BUG: Bad rss-counter state mm:000000000e90f232 type:MM_FILEPAGES val:33 [ 34.438543] BUG: Bad rss-counter state mm:000000000e90f232 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49701' (ECDSA) to the list of known hosts. 2023/06/19 22:04:42 fuzzer started 2023/06/19 22:04:43 dialing manager at localhost:44161 2023/06/19 22:04:43 checking machine... 2023/06/19 22:04:43 checking revisions... [ 35.215265] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:04:43 testing simple program... [ 35.269727] cgroup: Unknown subsys name 'net' [ 35.309827] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:04:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ff02298 RCX=0000000000000000 RDX=ffffffffffffffff RSI=0000000000000008 RDI=ffff88800ff0229c RBP=1ffff11002b0aed3 RSP=ffff888015857690 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000246 R13=ffff88800ff022a8 R14=0000000000000003 R15=0000000000000003 RIP=ffffffff812e0078 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8ac403d900 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=00007f8ac34bdf80 CR3=000000000c72c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fcc4d2686b2bdbf400000000000ae988 XMM05=7d9d62be4f32e74100000000001365a8 XMM06=ff82a3dc81e9874b00000000001352e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000032b420bc RBX=000000000000d278 RCX=0000000000000000 RDX=ffff8880169fd1c0 RSI=ffffffff813c9c86 RDI=0000000000000007 RBP=ffff88801699fed0 RSP=ffff88801699fe28 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000003b690c R13=ffffffff9b6f2f27 R14=1ffff11002d33fda R15=dffffc0000000000 RIP=ffffffff813c9cb4 RFL=00000293 [--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 00007f3cfce9a900 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=00007ffde17ab000 CR3=000000000e85c000 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