syzkaller login: [ 31.011740] BUG: Bad rss-counter state mm:00000000e892c7bf type:MM_FILEPAGES val:33 [ 31.012512] BUG: Bad rss-counter state mm:00000000e892c7bf type:MM_ANONPAGES val:22 [ 31.042756] ================================================================== [ 31.043540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.044330] Read of size 8 at addr ffff888019dd5c20 by task sshd/219 [ 31.045006] [ 31.045164] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.045953] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.046904] Call Trace: [ 31.047165] [ 31.047381] dump_stack_lvl+0x91/0xf0 [ 31.047751] print_report+0xcc/0x620 [ 31.048111] ? __virt_addr_valid+0x102/0x340 [ 31.048512] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.049447] kasan_report+0xbe/0xf0 [ 31.049789] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.050242] vma_interval_tree_remove+0xc75/0xec0 [ 31.050675] vma_prepare+0xc54/0x11a0 [ 31.051026] __split_vma+0x5af/0x950 [ 31.051378] ? __pfx___split_vma+0x10/0x10 [ 31.051773] ? find_held_lock+0x2c/0x110 [ 31.052148] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.052583] ? lock_is_held_type+0x9f/0x120 [ 31.052982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.053425] ? mtree_range_walk+0x632/0x900 [ 31.053828] ? mas_walk+0x5c7/0x7c0 [ 31.054176] do_vmi_munmap+0x1f1/0x2b0 [ 31.054535] mmap_region+0x1f9/0x2660 [ 31.054887] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.055260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.055785] ? __pfx_lock_acquire+0x10/0x10 [ 31.056180] ? __pfx_mmap_region+0x10/0x10 [ 31.056602] ? security_mmap_addr+0x7d/0xa0 [ 31.057016] ? get_unmapped_area+0x1f5/0x3f0 [ 31.057421] do_mmap+0x854/0xf00 [ 31.057748] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.058120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.058534] ksys_mmap_pgoff+0x3af/0x500 [ 31.058900] do_syscall_64+0x3f/0x90 [ 31.059250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.059735] RIP: 0033:0x7fdbcf2a8d82 [ 31.060061] 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 [ 31.061643] RSP: 002b:00007ffd1f5ddb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.062318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbcf2a8d82 [ 31.062931] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbce6e2000 [ 31.063558] RBP: 00007fdbce6e2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.064179] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639429bdf70 [ 31.064822] R13: 00007ffd1f5ddb80 R14: 00007ffd1f5ddbb0 R15: 00007ffd1f5ddf10 [ 31.065444] [ 31.065661] [ 31.065816] Allocated by task 212: [ 31.066141] kasan_save_stack+0x22/0x50 [ 31.066532] kasan_set_track+0x25/0x30 [ 31.066889] __kasan_slab_alloc+0x59/0x70 [ 31.067297] kmem_cache_alloc+0x16b/0x370 [ 31.067801] vm_area_dup+0x20/0x160 [ 31.068123] __split_vma+0x170/0x950 [ 31.068455] split_vma+0xc6/0x110 [ 31.068788] mprotect_fixup+0x8d2/0xb30 [ 31.069148] do_mprotect_pkey+0x87e/0xd40 [ 31.069523] __x64_sys_mprotect+0x78/0xc0 [ 31.069891] do_syscall_64+0x3f/0x90 [ 31.070227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.070682] [ 31.070831] Freed by task 212: [ 31.071108] kasan_save_stack+0x22/0x50 [ 31.071468] kasan_set_track+0x25/0x30 [ 31.071811] kasan_save_free_info+0x2b/0x50 [ 31.072190] __kasan_slab_free+0x10a/0x190 [ 31.072586] kmem_cache_free+0x10d/0x4d0 [ 31.072953] rcu_core+0x8c8/0x2860 [ 31.073270] __do_softirq+0x1b7/0x7d4 [ 31.073603] [ 31.073748] Last potentially related work creation: [ 31.074155] kasan_save_stack+0x22/0x50 [ 31.074517] __kasan_record_aux_stack+0x8e/0xa0 [ 31.074923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.075378] remove_vma+0x139/0x170 [ 31.075696] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.076089] do_vmi_munmap+0x1f1/0x2b0 [ 31.076431] __vm_munmap+0x138/0x3a0 [ 31.076781] __x64_sys_munmap+0x59/0x80 [ 31.077129] do_syscall_64+0x3f/0x90 [ 31.077461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.077907] [ 31.078055] The buggy address belongs to the object at ffff888019dd5bc8 [ 31.078055] which belongs to the cache vm_area_struct of size 168 [ 31.079073] The buggy address is located 88 bytes inside of [ 31.079073] freed 168-byte region [ffff888019dd5bc8, ffff888019dd5c70) [ 31.080062] [ 31.080215] The buggy address belongs to the physical page: [ 31.080688] page:00000000bffcbe20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dd5 [ 31.081443] memcg:ffff88800c69bf01 [ 31.081740] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.082186] page_type: 0xffffffff() [ 31.082497] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.083148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c69bf01 [ 31.083818] page dumped because: kasan: bad access detected [ 31.084361] [ 31.084555] Memory state around the buggy address: [ 31.084965] ffff888019dd5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.085574] ffff888019dd5b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.086180] >ffff888019dd5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.086789] ^ [ 31.087169] ffff888019dd5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.087778] ffff888019dd5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.088459] ================================================================== [ 31.089178] Disabling lock debugging due to kernel taint [ 33.110405] BUG: Bad rss-counter state mm:0000000071f744c4 type:MM_FILEPAGES val:33 [ 33.111119] BUG: Bad rss-counter state mm:0000000071f744c4 type:MM_ANONPAGES val:22 [ 33.482880] BUG: Bad rss-counter state mm:00000000efee077c type:MM_FILEPAGES val:33 [ 33.483672] BUG: Bad rss-counter state mm:00000000efee077c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54172' (ECDSA) to the list of known hosts. 2023/06/21 09:06:59 fuzzer started 2023/06/21 09:07:00 dialing manager at localhost:36067 2023/06/21 09:07:00 checking machine... 2023/06/21 09:07:00 checking revisions... [ 34.009365] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:07:00 testing simple program... [ 34.040985] cgroup: Unknown subsys name 'net' [ 34.077086] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:06:59 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=00007ffc7b8b2cc8 CR3=000000000f5f4000 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=2039353a36303a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a36303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff88800e9c0000 RSI=ffffffff83723dc0 RDI=0000000000000004 RBP=0000000000000003 RSP=ffff88800f2e77b8 R8 =0000000000000004 R9 =0000000000000002 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000002 R13=ffffffff87f99af0 R14=ffffffff83ab1580 R15=0000000000000006 RIP=ffffffff814c0880 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 00007fbbdc81c900 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=00007fbbdcdd3618 CR3=000000000dff2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000