[ 30.442519] BUG: Bad rss-counter state mm:00000000780f843c type:MM_FILEPAGES val:33 [ 30.443750] BUG: Bad rss-counter state mm:00000000780f843c type:MM_ANONPAGES val:22 [ 30.487022] ================================================================== [ 30.488337] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.489567] Read of size 8 at addr ffff88800d4e55c8 by task sshd/219 [ 30.490610] [ 30.490877] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.492097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.493274] Call Trace: [ 30.493669] [ 30.493998] dump_stack_lvl+0x91/0xf0 [ 30.494575] print_report+0xcc/0x620 [ 30.495148] ? __virt_addr_valid+0x102/0x340 [ 30.495805] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.496537] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.497268] kasan_report+0xbe/0xf0 [ 30.497838] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.498582] vma_interval_tree_remove+0xc75/0xec0 [ 30.499292] vma_prepare+0xc54/0x11a0 [ 30.499874] __split_vma+0x5af/0x950 [ 30.500429] ? __pfx___split_vma+0x10/0x10 [ 30.501050] ? find_held_lock+0x2c/0x110 [ 30.501664] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.502332] ? lock_is_held_type+0x9f/0x120 [ 30.502976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.503725] ? mtree_range_walk+0x632/0x900 [ 30.504375] ? mas_walk+0x5c7/0x7c0 [ 30.504941] do_vmi_munmap+0x1f1/0x2b0 [ 30.505532] mmap_region+0x1f9/0x2660 [ 30.506110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.506716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.507580] ? __pfx_lock_acquire+0x10/0x10 [ 30.508217] ? __pfx_mmap_region+0x10/0x10 [ 30.508848] ? security_mmap_addr+0x7d/0xa0 [ 30.509485] ? get_unmapped_area+0x1f5/0x3f0 [ 30.510154] do_mmap+0x854/0xf00 [ 30.510673] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.511264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.511933] ksys_mmap_pgoff+0x3af/0x500 [ 30.512543] do_syscall_64+0x3f/0x90 [ 30.513103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.513883] RIP: 0033:0x7f88345a1d82 [ 30.514435] 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 [ 30.517002] RSP: 002b:00007fff01085448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.518089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88345a1d82 [ 30.519096] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88339db000 [ 30.520114] RBP: 00007f88339db000 R08: 0000000000000009 R09: 0000000000001000 [ 30.521118] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd00641ec0 [ 30.522147] R13: 00007fff01085460 R14: 00007fff01085490 R15: 00007fff010857f0 [ 30.523164] [ 30.523535] [ 30.523803] Allocated by task 212: [ 30.524322] kasan_save_stack+0x22/0x50 [ 30.524923] kasan_set_track+0x25/0x30 [ 30.525503] __kasan_slab_alloc+0x59/0x70 [ 30.526118] kmem_cache_alloc+0x16b/0x370 [ 30.526741] vm_area_dup+0x20/0x160 [ 30.527285] __split_vma+0x170/0x950 [ 30.527838] split_vma+0xc6/0x110 [ 30.528349] mprotect_fixup+0x8d2/0xb30 [ 30.528949] do_mprotect_pkey+0x87e/0xd40 [ 30.529569] __x64_sys_mprotect+0x78/0xc0 [ 30.530190] do_syscall_64+0x3f/0x90 [ 30.530751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.531521] [ 30.531779] Freed by task 212: [ 30.532327] kasan_save_stack+0x22/0x50 [ 30.532923] kasan_set_track+0x25/0x30 [ 30.533508] kasan_save_free_info+0x2b/0x50 [ 30.534140] __kasan_slab_free+0x10a/0x190 [ 30.534775] kmem_cache_free+0x10d/0x4d0 [ 30.535375] rcu_core+0x8c8/0x2860 [ 30.535920] __do_softirq+0x1b7/0x7d4 [ 30.536488] [ 30.536743] Last potentially related work creation: [ 30.537440] kasan_save_stack+0x22/0x50 [ 30.538040] __kasan_record_aux_stack+0x8e/0xa0 [ 30.538734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.539512] remove_vma+0x139/0x170 [ 30.540049] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.540706] do_vmi_munmap+0x1f1/0x2b0 [ 30.541287] __vm_munmap+0x138/0x3a0 [ 30.541841] __x64_sys_munmap+0x59/0x80 [ 30.542443] do_syscall_64+0x3f/0x90 [ 30.543005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.543782] [ 30.544044] The buggy address belongs to the object at ffff88800d4e5570 [ 30.544044] which belongs to the cache vm_area_struct of size 168 [ 30.545779] The buggy address is located 88 bytes inside of [ 30.545779] freed 168-byte region [ffff88800d4e5570, ffff88800d4e5618) [ 30.547458] [ 30.547721] The buggy address belongs to the physical page: [ 30.548513] page:0000000053c3e208 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4e5 [ 30.549818] memcg:ffff88800ec65301 [ 30.550328] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.551097] page_type: 0xffffffff() [ 30.551653] raw: 0100000000000200 ffff8880087a0c80 ffffea000036e380 dead000000000006 [ 30.552770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec65301 [ 30.553861] page dumped because: kasan: bad access detected [ 30.554651] [ 30.554911] Memory state around the buggy address: [ 30.555609] ffff88800d4e5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.556637] ffff88800d4e5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.557662] >ffff88800d4e5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.558691] ^ [ 30.559513] ffff88800d4e5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.560536] ffff88800d4e5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.561559] ================================================================== [ 30.562650] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.541830] BUG: Bad rss-counter state mm:000000006b2547be type:MM_FILEPAGES val:33 [ 32.542987] BUG: Bad rss-counter state mm:000000006b2547be type:MM_ANONPAGES val:22 [ 32.987558] BUG: Bad rss-counter state mm:000000006b3b624e type:MM_FILEPAGES val:33 [ 32.989209] BUG: Bad rss-counter state mm:000000006b3b624e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39194' (ECDSA) to the list of known hosts. 2023/06/20 23:14:27 fuzzer started 2023/06/20 23:14:27 dialing manager at localhost:36067 2023/06/20 23:14:27 checking machine... 2023/06/20 23:14:27 checking revisions... [ 33.695035] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:14:27 testing simple program... [ 33.736605] cgroup: Unknown subsys name 'net' [ 33.771637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:14:27 Registers: info registers vcpu 0 RAX=000000000000001b RBX=00007f271565ba84 RCX=0000000000000000 RDX=00007ffccbd02910 RSI=000055a85a6b91e0 RDI=000055a85a691350 RBP=00007ffccbd02910 RSP=00007ffccbd028e8 R8 =0000000000000000 R9 =000000000000001b R10=00007ffccbd02687 R11=0000000000000000 R12=000055a85a6a7740 R13=000055a85a696ce0 R14=00007f2714b2c6f8 R15=000055a85a6b91e0 RIP=00007f27156518f0 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2714b2c900 00000000 00000000 GS =0000 0000000000000000 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=00007f27150e40b0 CR3=000000000cc66000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7465675f6c697475646f6d6d61705f00 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=ffff888008c04400 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=00007fd9d9074000 CR3=00000000165e0000 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=2037323a34313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a34313a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000