[ 37.487054] sshd (212) used greatest stack depth: 24424 bytes left [ 37.488649] BUG: Bad rss-counter state mm:0000000080db5fe2 type:MM_FILEPAGES val:33 [ 37.489781] BUG: Bad rss-counter state mm:0000000080db5fe2 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.647312] ================================================================== [ 37.648228] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.649190] Read of size 8 at addr ffff88800df0dc20 by task sshd/219 [ 37.650066] [ 37.650283] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.651147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.652157] Call Trace: [ 37.652480] [ 37.652771] dump_stack_lvl+0x91/0xf0 [ 37.653271] print_report+0xcc/0x620 [ 37.653759] ? __virt_addr_valid+0x102/0x340 [ 37.654307] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.654924] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.655538] kasan_report+0xbe/0xf0 [ 37.656023] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.656651] vma_interval_tree_remove+0xc75/0xec0 [ 37.657310] vma_prepare+0xc54/0x11a0 [ 37.657818] __split_vma+0x5af/0x950 [ 37.658310] ? __pfx___split_vma+0x10/0x10 [ 37.658872] ? find_held_lock+0x2c/0x110 [ 37.659418] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.660010] ? lock_is_held_type+0x9f/0x120 [ 37.660574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.661214] ? mtree_range_walk+0x632/0x900 [ 37.661793] ? mas_walk+0x5c7/0x7c0 [ 37.662284] do_vmi_munmap+0x1f1/0x2b0 [ 37.662809] mmap_region+0x1f9/0x2660 [ 37.663314] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.663850] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.664594] ? __pfx_lock_acquire+0x10/0x10 [ 37.665162] ? __pfx_mmap_region+0x10/0x10 [ 37.665718] ? security_mmap_addr+0x7d/0xa0 [ 37.666271] ? get_unmapped_area+0x1f5/0x3f0 [ 37.666845] do_mmap+0x854/0xf00 [ 37.667302] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.667825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.668411] ksys_mmap_pgoff+0x3af/0x500 [ 37.668941] do_syscall_64+0x3f/0x90 [ 37.669468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.670159] RIP: 0033:0x7ff4b5084d82 [ 37.670634] 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 [ 37.672888] RSP: 002b:00007ffd65e7ef48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.673845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4b5084d82 [ 37.674750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4b44be000 [ 37.675641] RBP: 00007ff4b44be000 R08: 0000000000000009 R09: 0000000000001000 [ 37.676531] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624316a0ec0 [ 37.677430] R13: 00007ffd65e7ef60 R14: 00007ffd65e7ef90 R15: 00007ffd65e7f2f0 [ 37.678336] [ 37.678643] [ 37.678867] Allocated by task 212: [ 37.679316] kasan_save_stack+0x22/0x50 [ 37.679846] kasan_set_track+0x25/0x30 [ 37.680369] __kasan_slab_alloc+0x59/0x70 [ 37.680930] kmem_cache_alloc+0x16b/0x370 [ 37.681500] vm_area_dup+0x20/0x160 [ 37.681977] __split_vma+0x170/0x950 [ 37.682463] split_vma+0xc6/0x110 [ 37.682918] mprotect_fixup+0x8d2/0xb30 [ 37.683440] do_mprotect_pkey+0x87e/0xd40 [ 37.683982] __x64_sys_mprotect+0x78/0xc0 [ 37.684526] do_syscall_64+0x3f/0x90 [ 37.685022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.685695] [ 37.685920] Freed by task 212: [ 37.686324] kasan_save_stack+0x22/0x50 [ 37.686852] kasan_set_track+0x25/0x30 [ 37.687370] kasan_save_free_info+0x2b/0x50 [ 37.687931] __kasan_slab_free+0x10a/0x190 [ 37.688488] kmem_cache_free+0x10d/0x4d0 [ 37.689021] rcu_core+0x8c8/0x2860 [ 37.689518] __do_softirq+0x1b7/0x7d4 [ 37.690019] [ 37.690247] Last potentially related work creation: [ 37.690862] kasan_save_stack+0x22/0x50 [ 37.691394] __kasan_record_aux_stack+0x8e/0xa0 [ 37.691997] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.692683] remove_vma+0x139/0x170 [ 37.693169] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.693755] do_vmi_munmap+0x1f1/0x2b0 [ 37.694260] __vm_munmap+0x138/0x3a0 [ 37.694745] __x64_sys_munmap+0x59/0x80 [ 37.695270] do_syscall_64+0x3f/0x90 [ 37.695764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.696436] [ 37.696664] Second to last potentially related work creation: [ 37.697389] kasan_save_stack+0x22/0x50 [ 37.697919] __kasan_record_aux_stack+0x8e/0xa0 [ 37.698524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.699191] remove_vma+0x139/0x170 [ 37.699668] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.700251] do_vmi_munmap+0x1f1/0x2b0 [ 37.700756] mmap_region+0x1f9/0x2660 [ 37.701277] do_mmap+0x854/0xf00 [ 37.701734] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.702249] ksys_mmap_pgoff+0x3af/0x500 [ 37.702772] do_syscall_64+0x3f/0x90 [ 37.703268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.703936] [ 37.704160] The buggy address belongs to the object at ffff88800df0dbc8 [ 37.704160] which belongs to the cache vm_area_struct of size 168 [ 37.705716] The buggy address is located 88 bytes inside of [ 37.705716] freed 168-byte region [ffff88800df0dbc8, ffff88800df0dc70) [ 37.707204] [ 37.707430] The buggy address belongs to the physical page: [ 37.708127] page:00000000c1e6fe97 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf0d [ 37.709272] memcg:ffff88800c6ede01 [ 37.709718] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.710391] page_type: 0xffffffff() [ 37.710866] raw: 0100000000000200 ffff88800879fc80 ffffea0000391040 dead000000000008 [ 37.711839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6ede01 [ 37.712791] page dumped because: kasan: bad access detected [ 37.713507] [ 37.713737] Memory state around the buggy address: [ 37.714343] ffff88800df0db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.715248] ffff88800df0db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.716154] >ffff88800df0dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.717065] ^ [ 37.717629] ffff88800df0dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.718526] ffff88800df0dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.719427] ================================================================== [ 37.720582] Disabling lock debugging due to kernel taint [ 39.549371] BUG: Bad rss-counter state mm:000000009f8c0203 type:MM_FILEPAGES val:33 [ 39.551580] BUG: Bad rss-counter state mm:000000009f8c0203 type:MM_ANONPAGES val:22 [ 40.117615] BUG: Bad rss-counter state mm:0000000008bf44eb type:MM_FILEPAGES val:33 [ 40.118829] BUG: Bad rss-counter state mm:0000000008bf44eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11580' (ECDSA) to the list of known hosts. 2023/06/19 17:24:35 fuzzer started 2023/06/19 17:24:36 dialing manager at localhost:44161 2023/06/19 17:24:36 checking machine... 2023/06/19 17:24:36 checking revisions... [ 40.803857] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:24:36 testing simple program... [ 40.845301] cgroup: Unknown subsys name 'net' [ 40.909670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:24:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=000055cee00e8290 CR3=000000000efca000 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=2035333a34323a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34323a3731203931 XMM08=3d656e696c646d632022656369767265 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=00007f7cfed77110 CR3=000000000aaee000 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=fc867e1285556c942d4882f4e825739f XMM02=2c67c8bc2e329bc30000000000121a78 XMM03=fb795ef6d65770560000000000124770 XMM04=ed626ced22439cbe00000000000ae988 XMM05=dfcdbad4f1609c370000000000135538 XMM06=4adead28e45380a60000000000134710 XMM07=e042d86d42eb936e0000000000124a48 XMM08=f4499e21555049df0000000000121ad8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000