[ 52.086848] BUG: Bad rss-counter state mm:00000000f2bfb472 type:MM_FILEPAGES val:33 [ 52.087901] BUG: Bad rss-counter state mm:00000000f2bfb472 type:MM_ANONPAGES val:22 [ 52.193581] ================================================================== [ 52.194159] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.194738] Read of size 8 at addr ffff88801581f4e0 by task sshd/219 [ 52.195211] [ 52.195342] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.195871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.196493] Call Trace: [ 52.196690] [ 52.196865] dump_stack_lvl+0x91/0xf0 [ 52.197170] print_report+0xcc/0x620 [ 52.197465] ? __virt_addr_valid+0x102/0x340 [ 52.197805] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.198185] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.198569] kasan_report+0xbe/0xf0 [ 52.199046] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.199429] vma_interval_tree_remove+0xc75/0xec0 [ 52.199793] vma_prepare+0xc54/0x11a0 [ 52.200094] __split_vma+0x5af/0x950 [ 52.200393] ? __pfx___split_vma+0x10/0x10 [ 52.200719] ? find_held_lock+0x2c/0x110 [ 52.201054] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.201412] ? lock_is_held_type+0x9f/0x120 [ 52.201747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.202119] ? mtree_range_walk+0x632/0x900 [ 52.202457] ? mas_walk+0x5c7/0x7c0 [ 52.202745] do_vmi_munmap+0x1f1/0x2b0 [ 52.203043] mmap_region+0x1f9/0x2660 [ 52.203345] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.203655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.204088] ? __pfx_lock_acquire+0x10/0x10 [ 52.204435] ? __pfx_mmap_region+0x10/0x10 [ 52.204763] ? security_mmap_addr+0x7d/0xa0 [ 52.205091] ? get_unmapped_area+0x1f5/0x3f0 [ 52.205431] do_mmap+0x854/0xf00 [ 52.205697] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.206001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.206350] ksys_mmap_pgoff+0x3af/0x500 [ 52.206664] do_syscall_64+0x3f/0x90 [ 52.206963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.207365] RIP: 0033:0x7ff470b8dd82 [ 52.207646] 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 [ 52.208963] RSP: 002b:00007ffeaf9440d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.209550] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff470b8dd82 [ 52.210074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff46ffc7000 [ 52.210604] RBP: 00007ff46ffc7000 R08: 0000000000000009 R09: 0000000000001000 [ 52.211128] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3d3708980 [ 52.211656] R13: 00007ffeaf9440f0 R14: 00007ffeaf944120 R15: 00007ffeaf944480 [ 52.212200] [ 52.212377] [ 52.212510] Allocated by task 212: [ 52.212774] kasan_save_stack+0x22/0x50 [ 52.213084] kasan_set_track+0x25/0x30 [ 52.213396] __kasan_slab_alloc+0x59/0x70 [ 52.213720] kmem_cache_alloc+0x16b/0x370 [ 52.214037] vm_area_dup+0x20/0x160 [ 52.214319] __split_vma+0x170/0x950 [ 52.214608] split_vma+0xc6/0x110 [ 52.214878] mprotect_fixup+0x8d2/0xb30 [ 52.215187] do_mprotect_pkey+0x87e/0xd40 [ 52.215499] __x64_sys_mprotect+0x78/0xc0 [ 52.215819] do_syscall_64+0x3f/0x90 [ 52.216113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.216513] [ 52.216645] Freed by task 212: [ 52.216887] kasan_save_stack+0x22/0x50 [ 52.217196] kasan_set_track+0x25/0x30 [ 52.217495] kasan_save_free_info+0x2b/0x50 [ 52.217839] __kasan_slab_free+0x10a/0x190 [ 52.218220] kmem_cache_free+0x10d/0x4d0 [ 52.218533] rcu_core+0x8c8/0x2860 [ 52.218810] __do_softirq+0x1b7/0x7d4 [ 52.219106] [ 52.219236] Last potentially related work creation: [ 52.219590] kasan_save_stack+0x22/0x50 [ 52.219899] __kasan_record_aux_stack+0x8e/0xa0 [ 52.220258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.220644] remove_vma+0x139/0x170 [ 52.220919] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.221263] do_vmi_munmap+0x1f1/0x2b0 [ 52.221565] __vm_munmap+0x138/0x3a0 [ 52.221855] __x64_sys_munmap+0x59/0x80 [ 52.222158] do_syscall_64+0x3f/0x90 [ 52.222449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.222843] [ 52.222971] The buggy address belongs to the object at ffff88801581f488 [ 52.222971] which belongs to the cache vm_area_struct of size 168 [ 52.223875] The buggy address is located 88 bytes inside of [ 52.223875] freed 168-byte region [ffff88801581f488, ffff88801581f530) [ 52.224757] [ 52.224887] The buggy address belongs to the physical page: [ 52.225290] page:000000008cd289fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1581f [ 52.225951] memcg:ffff88800e10a001 [ 52.226214] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.226617] page_type: 0xffffffff() [ 52.226890] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.227459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e10a001 [ 52.228022] page dumped because: kasan: bad access detected [ 52.228429] [ 52.228560] Memory state around the buggy address: [ 52.228917] ffff88801581f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.229438] ffff88801581f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 52.229964] >ffff88801581f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.230490] ^ [ 52.230949] ffff88801581f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 52.231482] ffff88801581f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.232003] ================================================================== [ 52.232586] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 54.697731] BUG: Bad rss-counter state mm:000000005f927dc9 type:MM_FILEPAGES val:33 [ 54.698597] BUG: Bad rss-counter state mm:000000005f927dc9 type:MM_ANONPAGES val:22 [ 55.120136] BUG: Bad rss-counter state mm:00000000be378b53 type:MM_FILEPAGES val:33 [ 55.121075] BUG: Bad rss-counter state mm:00000000be378b53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28194' (ECDSA) to the list of known hosts. 2023/06/20 10:42:02 fuzzer started 2023/06/20 10:42:03 dialing manager at localhost:44161 2023/06/20 10:42:03 checking machine... 2023/06/20 10:42:03 checking revisions... [ 55.845476] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:42:03 testing simple program... [ 55.905501] cgroup: Unknown subsys name 'net' [ 55.941965] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:41:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100d9b6ad5 RSI=ffffffff818d51fd RDI=0000000000000005 RBP=ffff888018257b30 RSP=ffff8880182578a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88806cdb56a8 R13=ffff88800b544468 R14=ffff888018257b58 R15=ffff888018257b30 RIP=ffffffff818d5212 RFL=00000246 [---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 00007ff71125b900 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=00007ff711810650 CR3=000000000e3c6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff4a148eb8 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=00007f4735ddb510000055ebfccb0790 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