syzkaller login: [ 35.658533] BUG: Bad rss-counter state mm:000000005383b002 type:MM_FILEPAGES val:33 [ 35.660414] BUG: Bad rss-counter state mm:000000005383b002 type:MM_ANONPAGES val:22 [ 35.853281] ================================================================== [ 35.854415] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.855669] Read of size 8 at addr ffff88800e4c3798 by task sshd/219 [ 35.856625] [ 35.856863] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.857771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.858810] Call Trace: [ 35.859153] [ 35.859457] dump_stack_lvl+0x91/0xf0 [ 35.859974] print_report+0xcc/0x620 [ 35.860490] ? __virt_addr_valid+0x102/0x340 [ 35.861088] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.861741] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.862403] kasan_report+0xbe/0xf0 [ 35.862910] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.863580] vma_interval_tree_remove+0xc75/0xec0 [ 35.864249] vma_prepare+0xc54/0x11a0 [ 35.864759] __split_vma+0x5af/0x950 [ 35.865271] ? __pfx___split_vma+0x10/0x10 [ 35.865835] ? find_held_lock+0x2c/0x110 [ 35.866403] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.867017] ? lock_is_held_type+0x9f/0x120 [ 35.867592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.868254] ? mtree_range_walk+0x632/0x900 [ 35.868839] ? mas_walk+0x5c7/0x7c0 [ 35.869351] do_vmi_munmap+0x1f1/0x2b0 [ 35.869885] mmap_region+0x1f9/0x2660 [ 35.870403] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.870961] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.871726] ? __pfx_lock_acquire+0x10/0x10 [ 35.872309] ? __pfx_mmap_region+0x10/0x10 [ 35.872872] ? security_mmap_addr+0x7d/0xa0 [ 35.873446] ? get_unmapped_area+0x1f5/0x3f0 [ 35.874035] do_mmap+0x854/0xf00 [ 35.874503] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.875034] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.875681] ksys_mmap_pgoff+0x3af/0x500 [ 35.876234] do_syscall_64+0x3f/0x90 [ 35.876821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.877514] RIP: 0033:0x7fe09548dd82 [ 35.878003] 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 [ 35.880272] RSP: 002b:00007ffcf00cb8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.881227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe09548dd82 [ 35.882134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0948c7000 [ 35.883034] RBP: 00007fe0948c7000 R08: 0000000000000009 R09: 0000000000001000 [ 35.883918] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a40d83fec0 [ 35.884837] R13: 00007ffcf00cb8e0 R14: 00007ffcf00cb910 R15: 00007ffcf00cbc70 [ 35.885753] [ 35.886060] [ 35.886287] Allocated by task 212: [ 35.886782] kasan_save_stack+0x22/0x50 [ 35.887317] kasan_set_track+0x25/0x30 [ 35.887915] __kasan_slab_alloc+0x59/0x70 [ 35.888464] kmem_cache_alloc+0x16b/0x370 [ 35.889006] vm_area_dup+0x20/0x160 [ 35.889491] __split_vma+0x170/0x950 [ 35.889985] split_vma+0xc6/0x110 [ 35.890449] mprotect_fixup+0x8d2/0xb30 [ 35.890978] do_mprotect_pkey+0x87e/0xd40 [ 35.891518] __x64_sys_mprotect+0x78/0xc0 [ 35.892071] do_syscall_64+0x3f/0x90 [ 35.892592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.893271] [ 35.893497] Freed by task 212: [ 35.893906] kasan_save_stack+0x22/0x50 [ 35.894456] kasan_set_track+0x25/0x30 [ 35.895005] kasan_save_free_info+0x2b/0x50 [ 35.895602] __kasan_slab_free+0x10a/0x190 [ 35.896200] kmem_cache_free+0x10d/0x4d0 [ 35.896728] rcu_core+0x8c8/0x2860 [ 35.897196] __do_softirq+0x1b7/0x7d4 [ 35.897700] [ 35.897924] Last potentially related work creation: [ 35.898538] kasan_save_stack+0x22/0x50 [ 35.899060] __kasan_record_aux_stack+0x8e/0xa0 [ 35.899663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.900349] remove_vma+0x139/0x170 [ 35.900861] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.901461] do_vmi_munmap+0x1f1/0x2b0 [ 35.902023] __vm_munmap+0x138/0x3a0 [ 35.902515] __x64_sys_munmap+0x59/0x80 [ 35.903030] do_syscall_64+0x3f/0x90 [ 35.903524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.904219] [ 35.904468] The buggy address belongs to the object at ffff88800e4c3740 [ 35.904468] which belongs to the cache vm_area_struct of size 168 [ 35.906117] The buggy address is located 88 bytes inside of [ 35.906117] freed 168-byte region [ffff88800e4c3740, ffff88800e4c37e8) [ 35.907667] [ 35.907910] The buggy address belongs to the physical page: [ 35.908648] page:000000000f808e03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4c3 [ 35.909810] memcg:ffff88800e005e01 [ 35.910274] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.910992] page_type: 0xffffffff() [ 35.911481] raw: 0100000000000200 ffff8880087a0c80 ffffea00003e9a00 dead000000000002 [ 35.912546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e005e01 [ 35.913509] page dumped because: kasan: bad access detected [ 35.914217] [ 35.914468] Memory state around the buggy address: [ 35.915133] ffff88800e4c3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.916133] ffff88800e4c3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.917043] >ffff88800e4c3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.917950] ^ [ 35.918479] ffff88800e4c3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.919388] ffff88800e4c3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.920312] ================================================================== [ 35.921381] Disabling lock debugging due to kernel taint [ 37.806653] BUG: Bad rss-counter state mm:00000000973d92bf type:MM_FILEPAGES val:33 [ 37.807631] BUG: Bad rss-counter state mm:00000000973d92bf type:MM_ANONPAGES val:22 [ 38.279396] BUG: Bad rss-counter state mm:0000000003b121eb type:MM_FILEPAGES val:33 [ 38.280414] BUG: Bad rss-counter state mm:0000000003b121eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48404' (ECDSA) to the list of known hosts. 2023/06/21 00:22:36 fuzzer started 2023/06/21 00:22:36 dialing manager at localhost:36067 2023/06/21 00:22:36 checking machine... 2023/06/21 00:22:36 checking revisions... [ 38.970815] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:22:36 testing simple program... [ 39.020062] cgroup: Unknown subsys name 'net' [ 39.067587] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:22:36 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff888018cc3680 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce099d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff8880145a9a80 RIP=ffffffff814c086b 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 00007f8422c66900 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=00007f842321e0b0 CR3=000000000c4b4000 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=2035333a32323a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a32323a3030203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007efeda94f050 CR3=000000000ee9a000 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=4d7f9baf7d2aae91b34bcec5525c9ef9 XMM02=ec2efd57dc4c00df000000000011bc20 XMM03=96525dc611f7063a000000000011bcf0 XMM04=54f8caee33e18fa800000000000ae988 XMM05=dfcdbad4f1609c370000000000132128 XMM06=0dbfb2dddc53005b0000000000131300 XMM07=e042d86d42eb936e0000000000122908 XMM08=96525dc611f7063a000000000011bcf0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000