[ 31.542466] BUG: Bad rss-counter state mm:00000000dafd4e2a type:MM_FILEPAGES val:33 [ 31.544326] BUG: Bad rss-counter state mm:00000000dafd4e2a type:MM_ANONPAGES val:22 [ 31.713258] ================================================================== [ 31.714186] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.715118] Read of size 8 at addr ffff88801a3e54e0 by task sshd/221 [ 31.715890] [ 31.716108] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.717114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.718095] Call Trace: [ 31.718423] [ 31.718707] dump_stack_lvl+0x91/0xf0 [ 31.719218] print_report+0xcc/0x620 [ 31.719702] ? __virt_addr_valid+0x102/0x340 [ 31.720273] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.720892] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.721508] kasan_report+0xbe/0xf0 [ 31.721982] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.722602] vma_interval_tree_remove+0xc75/0xec0 [ 31.723205] vma_prepare+0xc54/0x11a0 [ 31.723688] __split_vma+0x5af/0x950 [ 31.724172] ? __pfx___split_vma+0x10/0x10 [ 31.724695] ? find_held_lock+0x2c/0x110 [ 31.725216] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.725784] ? lock_is_held_type+0x9f/0x120 [ 31.726322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.726942] ? mtree_range_walk+0x632/0x900 [ 31.727496] ? mas_walk+0x5c7/0x7c0 [ 31.727995] do_vmi_munmap+0x1f1/0x2b0 [ 31.728486] mmap_region+0x1f9/0x2660 [ 31.728966] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.729481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.730199] ? __pfx_lock_acquire+0x10/0x10 [ 31.730740] ? __pfx_mmap_region+0x10/0x10 [ 31.731267] ? security_mmap_addr+0x7d/0xa0 [ 31.731804] ? get_unmapped_area+0x1f5/0x3f0 [ 31.732358] do_mmap+0x854/0xf00 [ 31.732797] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.733289] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.733853] ksys_mmap_pgoff+0x3af/0x500 [ 31.734358] do_syscall_64+0x3f/0x90 [ 31.734837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.735481] RIP: 0033:0x7f29d2565d82 [ 31.735956] 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 [ 31.738068] RSP: 002b:00007ffe11939cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.738970] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29d2565d82 [ 31.739821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29d199f000 [ 31.740666] RBP: 00007f29d199f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.741532] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d73d91ec0 [ 31.742391] R13: 00007ffe11939d10 R14: 00007ffe11939d40 R15: 00007ffe1193a0a0 [ 31.743257] [ 31.743548] [ 31.743767] Allocated by task 213: [ 31.744209] kasan_save_stack+0x22/0x50 [ 31.744713] kasan_set_track+0x25/0x30 [ 31.745206] __kasan_slab_alloc+0x59/0x70 [ 31.745729] kmem_cache_alloc+0x16b/0x370 [ 31.746242] vm_area_dup+0x20/0x160 [ 31.746697] __split_vma+0x170/0x950 [ 31.747162] split_vma+0xc6/0x110 [ 31.747597] mprotect_fixup+0x8d2/0xb30 [ 31.748113] do_mprotect_pkey+0x87e/0xd40 [ 31.748630] __x64_sys_mprotect+0x78/0xc0 [ 31.749158] do_syscall_64+0x3f/0x90 [ 31.749628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750268] [ 31.750483] Freed by task 213: [ 31.750882] kasan_save_stack+0x22/0x50 [ 31.751377] kasan_set_track+0x25/0x30 [ 31.751883] kasan_save_free_info+0x2b/0x50 [ 31.752415] __kasan_slab_free+0x10a/0x190 [ 31.752945] kmem_cache_free+0x10d/0x4d0 [ 31.753456] rcu_core+0x8c8/0x2860 [ 31.753895] __do_softirq+0x1b7/0x7d4 [ 31.754370] [ 31.754588] Last potentially related work creation: [ 31.755173] kasan_save_stack+0x22/0x50 [ 31.755673] __kasan_record_aux_stack+0x8e/0xa0 [ 31.756261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.756902] remove_vma+0x139/0x170 [ 31.757352] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.757972] do_vmi_munmap+0x1f1/0x2b0 [ 31.758458] __vm_munmap+0x138/0x3a0 [ 31.758919] __x64_sys_munmap+0x59/0x80 [ 31.759418] do_syscall_64+0x3f/0x90 [ 31.759898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760543] [ 31.760758] The buggy address belongs to the object at ffff88801a3e5488 [ 31.760758] which belongs to the cache vm_area_struct of size 168 [ 31.762222] The buggy address is located 88 bytes inside of [ 31.762222] freed 168-byte region [ffff88801a3e5488, ffff88801a3e5530) [ 31.763618] [ 31.763856] The buggy address belongs to the physical page: [ 31.764513] page:00000000647c8575 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3e5 [ 31.765603] memcg:ffff88801a39ee01 [ 31.766029] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.766673] page_type: 0xffffffff() [ 31.767121] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.768040] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a39ee01 [ 31.768951] page dumped because: kasan: bad access detected [ 31.769608] [ 31.769825] Memory state around the buggy address: [ 31.770404] ffff88801a3e5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.771252] ffff88801a3e5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.772118] >ffff88801a3e5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.772964] ^ [ 31.773713] ffff88801a3e5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.774565] ffff88801a3e5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.775413] ================================================================== [ 31.776480] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.564790] BUG: Bad rss-counter state mm:00000000e07d6fd6 type:MM_FILEPAGES val:33 [ 34.565945] BUG: Bad rss-counter state mm:00000000e07d6fd6 type:MM_ANONPAGES val:22 [ 35.044343] BUG: Bad rss-counter state mm:000000000c7f5cfb type:MM_FILEPAGES val:33 [ 35.045588] BUG: Bad rss-counter state mm:000000000c7f5cfb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38979' (ECDSA) to the list of known hosts. 2023/06/21 00:50:08 fuzzer started 2023/06/21 00:50:09 dialing manager at localhost:36067 2023/06/21 00:50:09 checking machine... 2023/06/21 00:50:09 checking revisions... [ 35.727567] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:50:09 testing simple program... [ 35.775428] cgroup: Unknown subsys name 'net' [ 35.814261] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:08 Registers: info registers vcpu 0 RAX=ffffffff8613897b RBX=0000000000000002 RCX=ffffffff86138976 RDX=0000000000000000 RSI=1ffffffff0c2712f RDI=ffffffff85dfdcb8 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff86138976 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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=00007fde2d2e3190 CR3=000000000dd90000 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=2038303a30353a3030203132206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a343136393420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a30353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fd6f2a8 RCX=1ffff11002e62344 RDX=ffff8880186879c8 RSI=ffffffff87b89f80 RDI=ffff888019fb5668 RBP=ffff8880173119f0 RSP=ffff88801586fcd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880186879e8 R13=0000000000000000 R14=ffff8880186879c8 R15=ffff888018687980 RIP=ffffffff81847771 RFL=00000096 [--S-AP-] 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 00007fa8fc466900 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=00007fa8fca1e0b0 CR3=000000000ec6c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000