syzkaller login: [ 31.681433] sshd (213) used greatest stack depth: 24128 bytes left [ 31.683039] BUG: Bad rss-counter state mm:000000001c858d98 type:MM_FILEPAGES val:33 [ 31.684350] BUG: Bad rss-counter state mm:000000001c858d98 type:MM_ANONPAGES val:22 [ 31.849668] ================================================================== [ 31.850579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.851520] Read of size 8 at addr ffff888016d86058 by task sshd/220 [ 31.852402] [ 31.852627] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.853503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.854481] Call Trace: [ 31.854802] [ 31.855087] dump_stack_lvl+0x91/0xf0 [ 31.855583] print_report+0xcc/0x620 [ 31.856070] ? __virt_addr_valid+0x102/0x340 [ 31.856640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.857267] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.857883] kasan_report+0xbe/0xf0 [ 31.858368] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.858987] vma_interval_tree_remove+0xc75/0xec0 [ 31.859591] vma_prepare+0xc54/0x11a0 [ 31.860074] __split_vma+0x5af/0x950 [ 31.860573] ? __pfx___split_vma+0x10/0x10 [ 31.861113] ? find_held_lock+0x2c/0x110 [ 31.861638] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.862199] ? lock_is_held_type+0x9f/0x120 [ 31.862734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.863339] ? mtree_range_walk+0x632/0x900 [ 31.863892] ? mas_walk+0x5c7/0x7c0 [ 31.864367] do_vmi_munmap+0x1f1/0x2b0 [ 31.864879] mmap_region+0x1f9/0x2660 [ 31.865368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.865878] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.866596] ? __pfx_lock_acquire+0x10/0x10 [ 31.867133] ? __pfx_mmap_region+0x10/0x10 [ 31.867666] ? security_mmap_addr+0x7d/0xa0 [ 31.868197] ? get_unmapped_area+0x1f5/0x3f0 [ 31.868764] do_mmap+0x854/0xf00 [ 31.869208] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.869711] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.870283] ksys_mmap_pgoff+0x3af/0x500 [ 31.870800] do_syscall_64+0x3f/0x90 [ 31.871282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.871935] RIP: 0033:0x7f1af8d78d82 [ 31.872394] 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 [ 31.874558] RSP: 002b:00007fff4575bba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.875469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1af8d78d82 [ 31.876327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1af81b2000 [ 31.877193] RBP: 00007f1af81b2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.878056] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fbba4b0ec0 [ 31.878913] R13: 00007fff4575bbc0 R14: 00007fff4575bbf0 R15: 00007fff4575bf50 [ 31.879786] [ 31.880083] [ 31.880303] Allocated by task 213: [ 31.880759] kasan_save_stack+0x22/0x50 [ 31.881264] kasan_set_track+0x25/0x30 [ 31.881768] __kasan_slab_alloc+0x59/0x70 [ 31.882292] kmem_cache_alloc+0x16b/0x370 [ 31.882814] vm_area_dup+0x20/0x160 [ 31.883274] __split_vma+0x170/0x950 [ 31.883746] split_vma+0xc6/0x110 [ 31.884183] mprotect_fixup+0x8d2/0xb30 [ 31.884691] do_mprotect_pkey+0x87e/0xd40 [ 31.885212] __x64_sys_mprotect+0x78/0xc0 [ 31.885735] do_syscall_64+0x3f/0x90 [ 31.886205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.886849] [ 31.887068] Freed by task 13: [ 31.887453] kasan_save_stack+0x22/0x50 [ 31.887953] kasan_set_track+0x25/0x30 [ 31.888452] kasan_save_free_info+0x2b/0x50 [ 31.889000] __kasan_slab_free+0x10a/0x190 [ 31.889532] kmem_cache_free+0x10d/0x4d0 [ 31.890049] rcu_core+0x8c8/0x2860 [ 31.890497] __do_softirq+0x1b7/0x7d4 [ 31.890973] [ 31.891191] Last potentially related work creation: [ 31.891784] kasan_save_stack+0x22/0x50 [ 31.892287] __kasan_record_aux_stack+0x8e/0xa0 [ 31.892961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.893628] remove_vma+0x139/0x170 [ 31.894081] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.894634] do_vmi_munmap+0x1f1/0x2b0 [ 31.895115] __vm_munmap+0x138/0x3a0 [ 31.895582] __x64_sys_munmap+0x59/0x80 [ 31.896074] do_syscall_64+0x3f/0x90 [ 31.896558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.897204] [ 31.897419] Second to last potentially related work creation: [ 31.898097] kasan_save_stack+0x22/0x50 [ 31.898599] __kasan_record_aux_stack+0x8e/0xa0 [ 31.899170] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.899809] remove_vma+0x139/0x170 [ 31.900259] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.900846] do_vmi_munmap+0x1f1/0x2b0 [ 31.901330] mmap_region+0x1f9/0x2660 [ 31.901807] do_mmap+0x854/0xf00 [ 31.902234] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.902731] ksys_mmap_pgoff+0x3af/0x500 [ 31.903235] do_syscall_64+0x3f/0x90 [ 31.903704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.904351] [ 31.904574] The buggy address belongs to the object at ffff888016d86000 [ 31.904574] which belongs to the cache vm_area_struct of size 168 [ 31.906038] The buggy address is located 88 bytes inside of [ 31.906038] freed 168-byte region [ffff888016d86000, ffff888016d860a8) [ 31.907438] [ 31.907653] The buggy address belongs to the physical page: [ 31.908308] page:00000000eb1ab497 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d86 [ 31.909405] memcg:ffff8880166b6d01 [ 31.909829] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.910467] page_type: 0xffffffff() [ 31.910918] raw: 0100000000000200 ffff88800879fc80 ffffea00003bbe40 dead000000000008 [ 31.911842] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166b6d01 [ 31.912765] page dumped because: kasan: bad access detected [ 31.913419] [ 31.913633] Memory state around the buggy address: [ 31.914213] ffff888016d85f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.915072] ffff888016d85f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.915926] >ffff888016d86000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.916777] ^ [ 31.917499] ffff888016d86080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.918354] ffff888016d86100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.919204] ================================================================== [ 31.920483] Disabling lock debugging due to kernel taint [ 33.666818] BUG: Bad rss-counter state mm:00000000c1072184 type:MM_FILEPAGES val:33 [ 33.668403] BUG: Bad rss-counter state mm:00000000c1072184 type:MM_ANONPAGES val:22 [ 34.189858] BUG: Bad rss-counter state mm:00000000becc219f type:MM_FILEPAGES val:33 [ 34.191297] BUG: Bad rss-counter state mm:00000000becc219f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24541' (ECDSA) to the list of known hosts. 2023/06/19 13:50:11 fuzzer started 2023/06/19 13:50:11 dialing manager at localhost:44161 2023/06/19 13:50:12 checking machine... 2023/06/19 13:50:12 checking revisions... [ 34.904735] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:50:12 testing simple program... [ 34.949596] cgroup: Unknown subsys name 'net' [ 35.005663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:50:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f544dc0a300 CR3=000000000c678000 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=00000000000000000000000000000000 XMM01=145f067762b9ddacf04b20d780807717 XMM02=2c67c8bc2e329bc3000000000011cba0 XMM03=fb795ef6d65770560000000000124040 XMM04=ab1f9d0e414eafba00000000000ae988 XMM05=e4cb8bb95a7664b60000000000135150 XMM06=c291bd5c70af25b90000000000134fd8 XMM07=e042d86d42eb936e00000000001242c0 XMM08=434a95e493e64e35000000000011cc00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000101 RBX=ffffffff85652988 RCX=0000000000000100 RDX=1ffffffff0aca531 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800d048200 RIP=ffffffff814c07eb 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 00007f487b93d900 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=00007fff0e1f3000 CR3=0000000018378000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000