syzkaller login: [ 39.851321] BUG: Bad rss-counter state mm:00000000c695d145 type:MM_FILEPAGES val:33 [ 39.852744] BUG: Bad rss-counter state mm:00000000c695d145 type:MM_ANONPAGES val:22 [ 40.008752] ================================================================== [ 40.009855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.010969] Read of size 8 at addr ffff88800d5c0b38 by task sshd/218 [ 40.012040] [ 40.012284] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.013170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.014192] Call Trace: [ 40.014521] [ 40.014810] dump_stack_lvl+0x91/0xf0 [ 40.015306] print_report+0xcc/0x620 [ 40.015794] ? __virt_addr_valid+0x102/0x340 [ 40.016360] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.016991] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.017612] kasan_report+0xbe/0xf0 [ 40.018126] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.018764] vma_interval_tree_remove+0xc75/0xec0 [ 40.019369] vma_prepare+0xc54/0x11a0 [ 40.019860] __split_vma+0x5af/0x950 [ 40.020329] ? __pfx___split_vma+0x10/0x10 [ 40.020864] ? find_held_lock+0x2c/0x110 [ 40.021388] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.021974] ? lock_is_held_type+0x9f/0x120 [ 40.022528] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.023143] ? mtree_range_walk+0x632/0x900 [ 40.023703] ? mas_walk+0x5c7/0x7c0 [ 40.024183] do_vmi_munmap+0x1f1/0x2b0 [ 40.024681] mmap_region+0x1f9/0x2660 [ 40.025162] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.025685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.026415] ? __pfx_lock_acquire+0x10/0x10 [ 40.026961] ? __pfx_mmap_region+0x10/0x10 [ 40.027504] ? security_mmap_addr+0x7d/0xa0 [ 40.028044] ? get_unmapped_area+0x1f5/0x3f0 [ 40.028598] do_mmap+0x854/0xf00 [ 40.029045] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.029546] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.030136] ksys_mmap_pgoff+0x3af/0x500 [ 40.030651] do_syscall_64+0x3f/0x90 [ 40.031128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.031782] RIP: 0033:0x7fee0826ed82 [ 40.032255] 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 [ 40.034428] RSP: 002b:00007ffc3c91ad68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.035350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee0826ed82 [ 40.036226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee076a8000 [ 40.037103] RBP: 00007fee076a8000 R08: 0000000000000009 R09: 0000000000001000 [ 40.038002] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fab260af70 [ 40.038867] R13: 00007ffc3c91ad80 R14: 00007ffc3c91adb0 R15: 00007ffc3c91b110 [ 40.039766] [ 40.040068] [ 40.040288] Allocated by task 211: [ 40.040730] kasan_save_stack+0x22/0x50 [ 40.041244] kasan_set_track+0x25/0x30 [ 40.041747] __kasan_slab_alloc+0x59/0x70 [ 40.042285] kmem_cache_alloc+0x16b/0x370 [ 40.042814] vm_area_dup+0x20/0x160 [ 40.043281] __split_vma+0x170/0x950 [ 40.043759] split_vma+0xc6/0x110 [ 40.044204] mprotect_fixup+0x8d2/0xb30 [ 40.044710] do_mprotect_pkey+0x87e/0xd40 [ 40.045232] __x64_sys_mprotect+0x78/0xc0 [ 40.045758] do_syscall_64+0x3f/0x90 [ 40.046241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.046881] [ 40.047095] Freed by task 211: [ 40.047497] kasan_save_stack+0x22/0x50 [ 40.048013] kasan_set_track+0x25/0x30 [ 40.048514] kasan_save_free_info+0x2b/0x50 [ 40.049051] __kasan_slab_free+0x10a/0x190 [ 40.049587] kmem_cache_free+0x10d/0x4d0 [ 40.050124] rcu_core+0x8c8/0x2860 [ 40.050574] __do_softirq+0x1b7/0x7d4 [ 40.051060] [ 40.051278] Last potentially related work creation: [ 40.051876] kasan_save_stack+0x22/0x50 [ 40.052384] __kasan_record_aux_stack+0x8e/0xa0 [ 40.053035] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.053707] remove_vma+0x139/0x170 [ 40.054162] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.054725] do_vmi_munmap+0x1f1/0x2b0 [ 40.055211] __vm_munmap+0x138/0x3a0 [ 40.055686] __x64_sys_munmap+0x59/0x80 [ 40.056193] do_syscall_64+0x3f/0x90 [ 40.056673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.057323] [ 40.057537] Second to last potentially related work creation: [ 40.058234] kasan_save_stack+0x22/0x50 [ 40.058744] __kasan_record_aux_stack+0x8e/0xa0 [ 40.059333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.060008] remove_vma+0x139/0x170 [ 40.060471] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.060997] do_vmi_munmap+0x1f1/0x2b0 [ 40.061458] mmap_region+0x1f9/0x2660 [ 40.061926] do_mmap+0x854/0xf00 [ 40.062343] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.062806] ksys_mmap_pgoff+0x3af/0x500 [ 40.063286] do_syscall_64+0x3f/0x90 [ 40.063735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.064340] [ 40.064545] The buggy address belongs to the object at ffff88800d5c0ae0 [ 40.064545] which belongs to the cache vm_area_struct of size 168 [ 40.066042] The buggy address is located 88 bytes inside of [ 40.066042] freed 168-byte region [ffff88800d5c0ae0, ffff88800d5c0b88) [ 40.067395] [ 40.067618] The buggy address belongs to the physical page: [ 40.068240] page:0000000029fcf80c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5c0 [ 40.069310] memcg:ffff88800c6bfc01 [ 40.069758] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.070431] page_type: 0xffffffff() [ 40.070890] raw: 0100000000000200 ffff88800879fc80 ffffea0000356f00 dead000000000007 [ 40.071811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6bfc01 [ 40.072742] page dumped because: kasan: bad access detected [ 40.073385] [ 40.073624] Memory state around the buggy address: [ 40.074215] ffff88800d5c0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.075092] ffff88800d5c0a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 40.075969] >ffff88800d5c0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.076856] ^ [ 40.077481] ffff88800d5c0b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 40.078354] ffff88800d5c0c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 40.079252] ================================================================== [ 40.080203] Disabling lock debugging due to kernel taint [ 42.456898] BUG: Bad rss-counter state mm:0000000034c7ac0f type:MM_FILEPAGES val:33 [ 42.457942] BUG: Bad rss-counter state mm:0000000034c7ac0f type:MM_ANONPAGES val:22 [ 43.046785] BUG: Bad rss-counter state mm:0000000073be2c88 type:MM_FILEPAGES val:33 [ 43.047957] BUG: Bad rss-counter state mm:0000000073be2c88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19863' (ECDSA) to the list of known hosts. 2023/06/19 23:46:47 fuzzer started 2023/06/19 23:46:47 dialing manager at localhost:44161 2023/06/19 23:46:47 checking machine... 2023/06/19 23:46:47 checking revisions... [ 43.714770] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:46:47 testing simple program... [ 43.766622] cgroup: Unknown subsys name 'net' [ 43.819684] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:46:46 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=00007f63d3ec6477 RCX=ffffffff813a0a8d RDX=ffffffffffffffff RSI=00007f63d3ec6477 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000006 R9 =00007f63d3ec6477 R10=ffffffffffffffff R11=00000000000b6996 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800e29d1c0 R15=ffff88800fe26540 RIP=ffffffff814c01d0 RFL=00000282 [--S----] 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 00007f63d39d3900 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=00007f63d3f8b0b0 CR3=000000000e660000 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=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f098658 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001e130cb RSI=ffff8880095c8b18 RDI=ffff88800c6cd8c0 RBP=ffff88800c5d42c8 RSP=ffff888008e57c98 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=ffff88800c6cd8b8 R13=fffffbfff0f70df0 R14=0000000000000000 R15=ffffffff87b86f80 RIP=ffffffff844cc4cf 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 =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=00007fde8f546000 CR3=000000000e660000 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=2037343a36343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a36343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000