syzkaller login: [ 30.228977] BUG: Bad rss-counter state mm:0000000072434acd type:MM_FILEPAGES val:33 [ 30.230335] BUG: Bad rss-counter state mm:0000000072434acd type:MM_ANONPAGES val:22 [ 30.410185] ================================================================== [ 30.411455] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.412849] Read of size 8 at addr ffff88800c98fa50 by task sshd/220 [ 30.413799] [ 30.414065] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.415111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.416289] Call Trace: [ 30.416674] [ 30.417013] dump_stack_lvl+0x91/0xf0 [ 30.417602] print_report+0xcc/0x620 [ 30.418186] ? __virt_addr_valid+0x102/0x340 [ 30.418845] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.419578] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.420320] kasan_report+0xbe/0xf0 [ 30.420888] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.421654] vma_interval_tree_remove+0xc75/0xec0 [ 30.422362] vma_prepare+0xc54/0x11a0 [ 30.422933] __split_vma+0x5af/0x950 [ 30.423497] ? __pfx___split_vma+0x10/0x10 [ 30.424121] ? find_held_lock+0x2c/0x110 [ 30.424731] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.425435] ? lock_is_held_type+0x9f/0x120 [ 30.426081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.426793] ? mtree_range_walk+0x632/0x900 [ 30.427436] ? mas_walk+0x5c7/0x7c0 [ 30.428001] do_vmi_munmap+0x1f1/0x2b0 [ 30.428589] mmap_region+0x1f9/0x2660 [ 30.429159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.429782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.430621] ? __pfx_lock_acquire+0x10/0x10 [ 30.431268] ? __pfx_mmap_region+0x10/0x10 [ 30.431935] ? security_mmap_addr+0x7d/0xa0 [ 30.432655] ? get_unmapped_area+0x1f5/0x3f0 [ 30.433412] do_mmap+0x854/0xf00 [ 30.434026] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.434683] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.435436] ksys_mmap_pgoff+0x3af/0x500 [ 30.436122] do_syscall_64+0x3f/0x90 [ 30.436775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.437627] RIP: 0033:0x7f91c0289d82 [ 30.438182] 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 [ 30.440697] RSP: 002b:00007ffcca258168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.441711] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91c0289d82 [ 30.442656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91bf6c3000 [ 30.443588] RBP: 00007f91bf6c3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.444525] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b295083b20 [ 30.445442] R13: 00007ffcca258180 R14: 00007ffcca2581b0 R15: 00007ffcca258510 [ 30.446373] [ 30.446683] [ 30.446910] Allocated by task 213: [ 30.447366] kasan_save_stack+0x22/0x50 [ 30.447903] kasan_set_track+0x25/0x30 [ 30.448431] __kasan_slab_alloc+0x59/0x70 [ 30.448994] kmem_cache_alloc+0x16b/0x370 [ 30.449546] vm_area_dup+0x20/0x160 [ 30.450045] __split_vma+0x170/0x950 [ 30.450532] split_vma+0xc6/0x110 [ 30.450991] mprotect_fixup+0x8d2/0xb30 [ 30.451524] do_mprotect_pkey+0x87e/0xd40 [ 30.452073] __x64_sys_mprotect+0x78/0xc0 [ 30.452613] do_syscall_64+0x3f/0x90 [ 30.453111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.453794] [ 30.454089] Freed by task 203: [ 30.454501] kasan_save_stack+0x22/0x50 [ 30.455041] kasan_set_track+0x25/0x30 [ 30.455564] kasan_save_free_info+0x2b/0x50 [ 30.456128] __kasan_slab_free+0x10a/0x190 [ 30.456709] kmem_cache_free+0x10d/0x4d0 [ 30.457250] rcu_core+0x8c8/0x2860 [ 30.457735] __do_softirq+0x1b7/0x7d4 [ 30.458238] [ 30.458465] Last potentially related work creation: [ 30.459078] kasan_save_stack+0x22/0x50 [ 30.459596] __kasan_record_aux_stack+0x8e/0xa0 [ 30.460193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.460853] remove_vma+0x139/0x170 [ 30.461334] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.461945] do_vmi_munmap+0x1f1/0x2b0 [ 30.462467] __vm_munmap+0x138/0x3a0 [ 30.462998] __x64_sys_munmap+0x59/0x80 [ 30.463519] do_syscall_64+0x3f/0x90 [ 30.464020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.464723] [ 30.464951] The buggy address belongs to the object at ffff88800c98f9f8 [ 30.464951] which belongs to the cache vm_area_struct of size 168 [ 30.466473] The buggy address is located 88 bytes inside of [ 30.466473] freed 168-byte region [ffff88800c98f9f8, ffff88800c98faa0) [ 30.467920] [ 30.468146] The buggy address belongs to the physical page: [ 30.468827] page:000000005eb6c38b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc98f [ 30.469971] memcg:ffff88801447da01 [ 30.470426] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.471119] page_type: 0xffffffff() [ 30.471608] raw: 0100000000000200 ffff8880087a0c80 ffffea0000355e40 dead000000000002 [ 30.472568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801447da01 [ 30.473496] page dumped because: kasan: bad access detected [ 30.474182] [ 30.474407] Memory state around the buggy address: [ 30.475008] ffff88800c98f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.475892] ffff88800c98f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.476778] >ffff88800c98fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.477658] ^ [ 30.478379] ffff88800c98fa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.479257] ffff88800c98fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.480125] ================================================================== [ 30.481128] Disabling lock debugging due to kernel taint [ 32.642538] BUG: Bad rss-counter state mm:00000000fb94749d type:MM_FILEPAGES val:33 [ 32.644274] BUG: Bad rss-counter state mm:00000000fb94749d type:MM_ANONPAGES val:22 [ 33.140558] BUG: Bad rss-counter state mm:00000000a4aeab00 type:MM_FILEPAGES val:33 [ 33.141667] BUG: Bad rss-counter state mm:00000000a4aeab00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14375' (ECDSA) to the list of known hosts. 2023/06/21 05:26:32 fuzzer started 2023/06/21 05:26:32 dialing manager at localhost:36067 2023/06/21 05:26:32 checking machine... 2023/06/21 05:26:32 checking revisions... [ 33.862810] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:26:33 testing simple program... [ 33.908095] cgroup: Unknown subsys name 'net' [ 33.947921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:26:32 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=00007f9ca5f78040 CR3=00000000169d8000 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=2032333a36323a3530203132206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a303839363420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a36323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818949a8 RDI=0000000000000005 RBP=ffff8880095676c8 RSP=ffff8880198a7950 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=000000000000000b R13=0000000000000081 R14=ffffffff856f0da0 R15=ffff8880095676ca RIP=ffffffff818949db 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 00007f171ad26900 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=0000564523894768 CR3=000000000da70000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000