syzkaller login: [ 31.534192] BUG: Bad rss-counter state mm:00000000af743b2f type:MM_FILEPAGES val:33 [ 31.535191] BUG: Bad rss-counter state mm:00000000af743b2f type:MM_ANONPAGES val:22 [ 31.712879] ================================================================== [ 31.713829] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.714759] Read of size 8 at addr ffff888019f42228 by task sshd/220 [ 31.715527] [ 31.715860] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.716724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.717733] Call Trace: [ 31.718060] [ 31.718354] dump_stack_lvl+0x91/0xf0 [ 31.718846] print_report+0xcc/0x620 [ 31.719341] ? __virt_addr_valid+0x102/0x340 [ 31.719890] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.720506] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.721114] kasan_report+0xbe/0xf0 [ 31.721633] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.722252] vma_interval_tree_remove+0xc75/0xec0 [ 31.722853] vma_prepare+0xc54/0x11a0 [ 31.723333] __split_vma+0x5af/0x950 [ 31.723805] ? __pfx___split_vma+0x10/0x10 [ 31.724328] ? find_held_lock+0x2c/0x110 [ 31.724844] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.725431] ? lock_is_held_type+0x9f/0x120 [ 31.725966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.726572] ? mtree_range_walk+0x632/0x900 [ 31.727122] ? mas_walk+0x5c7/0x7c0 [ 31.727595] do_vmi_munmap+0x1f1/0x2b0 [ 31.728080] mmap_region+0x1f9/0x2660 [ 31.728564] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.729075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.729829] ? __pfx_lock_acquire+0x10/0x10 [ 31.730357] ? __pfx_mmap_region+0x10/0x10 [ 31.730880] ? security_mmap_addr+0x7d/0xa0 [ 31.731409] ? get_unmapped_area+0x1f5/0x3f0 [ 31.731957] do_mmap+0x854/0xf00 [ 31.732391] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.732890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.733485] ksys_mmap_pgoff+0x3af/0x500 [ 31.733993] do_syscall_64+0x3f/0x90 [ 31.734467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.735108] RIP: 0033:0x7f016bb53d82 [ 31.735561] 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 [ 31.737702] RSP: 002b:00007ffd3c06d058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.738609] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f016bb53d82 [ 31.739455] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f016af8d000 [ 31.740305] RBP: 00007f016af8d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.741155] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d33bc61980 [ 31.742036] R13: 00007ffd3c06d070 R14: 00007ffd3c06d0a0 R15: 00007ffd3c06d400 [ 31.742895] [ 31.743188] [ 31.743402] Allocated by task 213: [ 31.743827] kasan_save_stack+0x22/0x50 [ 31.744328] kasan_set_track+0x25/0x30 [ 31.744819] __kasan_slab_alloc+0x59/0x70 [ 31.745364] kmem_cache_alloc+0x16b/0x370 [ 31.745890] vm_area_dup+0x20/0x160 [ 31.746345] __split_vma+0x170/0x950 [ 31.746809] split_vma+0xc6/0x110 [ 31.747253] mprotect_fixup+0x8d2/0xb30 [ 31.747757] do_mprotect_pkey+0x87e/0xd40 [ 31.748283] __x64_sys_mprotect+0x78/0xc0 [ 31.748802] do_syscall_64+0x3f/0x90 [ 31.749279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.749948] [ 31.750164] Freed by task 203: [ 31.750553] kasan_save_stack+0x22/0x50 [ 31.751056] kasan_set_track+0x25/0x30 [ 31.751551] kasan_save_free_info+0x2b/0x50 [ 31.752085] __kasan_slab_free+0x10a/0x190 [ 31.752611] kmem_cache_free+0x10d/0x4d0 [ 31.753113] rcu_core+0x8c8/0x2860 [ 31.753596] __do_softirq+0x1b7/0x7d4 [ 31.754075] [ 31.754289] Last potentially related work creation: [ 31.754867] kasan_save_stack+0x22/0x50 [ 31.755371] __kasan_record_aux_stack+0x8e/0xa0 [ 31.755945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.756584] remove_vma+0x139/0x170 [ 31.757034] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.757615] do_vmi_munmap+0x1f1/0x2b0 [ 31.758101] __vm_munmap+0x138/0x3a0 [ 31.758565] __x64_sys_munmap+0x59/0x80 [ 31.759057] do_syscall_64+0x3f/0x90 [ 31.759532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760176] [ 31.760390] The buggy address belongs to the object at ffff888019f421d0 [ 31.760390] which belongs to the cache vm_area_struct of size 168 [ 31.761878] The buggy address is located 88 bytes inside of [ 31.761878] freed 168-byte region [ffff888019f421d0, ffff888019f42278) [ 31.763292] [ 31.763505] The buggy address belongs to the physical page: [ 31.764163] page:0000000094efc6e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f42 [ 31.765250] memcg:ffff888015e56201 [ 31.765723] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.766372] page_type: 0xffffffff() [ 31.766821] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.767738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e56201 [ 31.768651] page dumped because: kasan: bad access detected [ 31.769308] [ 31.769548] Memory state around the buggy address: [ 31.770132] ffff888019f42100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.770996] ffff888019f42180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.771861] >ffff888019f42200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.772724] ^ [ 31.773274] ffff888019f42280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.774166] ffff888019f42300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.775009] ================================================================== [ 31.775974] Disabling lock debugging due to kernel taint [ 34.043245] BUG: Bad rss-counter state mm:0000000075b53c9e type:MM_FILEPAGES val:33 [ 34.044439] BUG: Bad rss-counter state mm:0000000075b53c9e type:MM_ANONPAGES val:22 [ 34.459351] BUG: Bad rss-counter state mm:0000000098a1b046 type:MM_FILEPAGES val:33 [ 34.460505] BUG: Bad rss-counter state mm:0000000098a1b046 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57350' (ECDSA) to the list of known hosts. 2023/06/21 06:30:37 fuzzer started 2023/06/21 06:30:37 dialing manager at localhost:36067 2023/06/21 06:30:37 checking machine... 2023/06/21 06:30:37 checking revisions... [ 35.172410] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:30:37 testing simple program... [ 35.213662] cgroup: Unknown subsys name 'net' [ 35.251893] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:30:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffd33b5588 CR3=000000000e502000 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=2036333a30333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a30333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001fa0e8a RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016af1b40 RSI=ffffffff83ab1b1f RDI=ffffffff8560b640 RBP=1ffff11001fa0e8a RSP=ffff88800fd07440 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a0900000a09 R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d86a9 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 00007ff6dc592900 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=00007fffcce95000 CR3=000000001c9a2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000