syzkaller login: [ 37.262843] BUG: Bad rss-counter state mm:00000000834cd4ca type:MM_FILEPAGES val:33 [ 37.264043] BUG: Bad rss-counter state mm:00000000834cd4ca type:MM_ANONPAGES val:22 [ 37.304321] ================================================================== [ 37.305505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.306744] Read of size 8 at addr ffff88800ecacd08 by task sshd/225 [ 37.307650] [ 37.307886] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.309019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.310168] Call Trace: [ 37.310511] [ 37.310860] dump_stack_lvl+0x91/0xf0 [ 37.311478] print_report+0xcc/0x620 [ 37.311999] ? __virt_addr_valid+0x102/0x340 [ 37.312595] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.313263] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.313939] kasan_report+0xbe/0xf0 [ 37.314446] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.315112] vma_interval_tree_remove+0xc75/0xec0 [ 37.315758] vma_prepare+0xc54/0x11a0 [ 37.316275] __split_vma+0x5af/0x950 [ 37.316781] ? __pfx___split_vma+0x10/0x10 [ 37.317348] ? find_held_lock+0x2c/0x110 [ 37.317935] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.318539] ? lock_is_held_type+0x9f/0x120 [ 37.319117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.319771] ? mtree_range_walk+0x632/0x900 [ 37.320361] ? mas_walk+0x5c7/0x7c0 [ 37.320868] do_vmi_munmap+0x1f1/0x2b0 [ 37.321394] mmap_region+0x1f9/0x2660 [ 37.321918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.322470] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.323238] ? __pfx_lock_acquire+0x10/0x10 [ 37.323809] ? __pfx_mmap_region+0x10/0x10 [ 37.324375] ? security_mmap_addr+0x7d/0xa0 [ 37.324948] ? get_unmapped_area+0x1f5/0x3f0 [ 37.325537] do_mmap+0x854/0xf00 [ 37.326010] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.326550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.327153] ksys_mmap_pgoff+0x3af/0x500 [ 37.327700] do_syscall_64+0x3f/0x90 [ 37.328215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.328910] RIP: 0033:0x7fcbfd81bd82 [ 37.329399] 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 [ 37.331680] RSP: 002b:00007ffec0e5eb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.332647] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcbfd81bd82 [ 37.333558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcbfcc55000 [ 37.334484] RBP: 00007fcbfcc55000 R08: 0000000000000009 R09: 0000000000001000 [ 37.335400] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fdbbc56ec0 [ 37.336306] R13: 00007ffec0e5ebb0 R14: 00007ffec0e5ebe0 R15: 00007ffec0e5ef40 [ 37.337233] [ 37.337549] [ 37.337790] Allocated by task 218: [ 37.338252] kasan_save_stack+0x22/0x50 [ 37.338790] kasan_set_track+0x25/0x30 [ 37.339322] __kasan_slab_alloc+0x59/0x70 [ 37.339882] kmem_cache_alloc+0x16b/0x370 [ 37.340440] vm_area_dup+0x20/0x160 [ 37.340933] __split_vma+0x170/0x950 [ 37.341435] split_vma+0xc6/0x110 [ 37.341925] mprotect_fixup+0x8d2/0xb30 [ 37.342459] do_mprotect_pkey+0x87e/0xd40 [ 37.343015] __x64_sys_mprotect+0x78/0xc0 [ 37.343577] do_syscall_64+0x3f/0x90 [ 37.344085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.344772] [ 37.345001] Freed by task 218: [ 37.345425] kasan_save_stack+0x22/0x50 [ 37.345976] kasan_set_track+0x25/0x30 [ 37.346500] kasan_save_free_info+0x2b/0x50 [ 37.347067] __kasan_slab_free+0x10a/0x190 [ 37.347643] kmem_cache_free+0x10d/0x4d0 [ 37.348191] rcu_core+0x8c8/0x2860 [ 37.348668] __do_softirq+0x1b7/0x7d4 [ 37.349182] [ 37.349488] Last potentially related work creation: [ 37.350135] kasan_save_stack+0x22/0x50 [ 37.350678] __kasan_record_aux_stack+0x8e/0xa0 [ 37.351297] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.351985] remove_vma+0x139/0x170 [ 37.352471] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.353063] do_vmi_munmap+0x1f1/0x2b0 [ 37.353590] __vm_munmap+0x138/0x3a0 [ 37.354099] __x64_sys_munmap+0x59/0x80 [ 37.354631] do_syscall_64+0x3f/0x90 [ 37.355138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.355821] [ 37.356051] Second to last potentially related work creation: [ 37.356786] kasan_save_stack+0x22/0x50 [ 37.357331] __kasan_record_aux_stack+0x8e/0xa0 [ 37.357964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.358650] remove_vma+0x139/0x170 [ 37.359134] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.359737] do_vmi_munmap+0x1f1/0x2b0 [ 37.360257] mmap_region+0x1f9/0x2660 [ 37.360772] do_mmap+0x854/0xf00 [ 37.361233] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.361770] ksys_mmap_pgoff+0x3af/0x500 [ 37.362317] do_syscall_64+0x3f/0x90 [ 37.362822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.363508] [ 37.363742] The buggy address belongs to the object at ffff88800ecaccb0 [ 37.363742] which belongs to the cache vm_area_struct of size 168 [ 37.365319] The buggy address is located 88 bytes inside of [ 37.365319] freed 168-byte region [ffff88800ecaccb0, ffff88800ecacd58) [ 37.366833] [ 37.367066] The buggy address belongs to the physical page: [ 37.367774] page:00000000b1ac9fba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecac [ 37.368955] memcg:ffff88800e70d401 [ 37.369427] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.370205] page_type: 0xffffffff() [ 37.370706] raw: 0100000000000200 ffff88800879fc80 ffffea00002cc140 dead000000000003 [ 37.371719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e70d401 [ 37.372716] page dumped because: kasan: bad access detected [ 37.373443] [ 37.373679] Memory state around the buggy address: [ 37.374332] ffff88800ecacc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.375274] ffff88800ecacc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.376197] >ffff88800ecacd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.377105] ^ [ 37.377579] ffff88800ecacd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.378502] ffff88800ecace00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.379418] ================================================================== [ 37.380418] Disabling lock debugging due to kernel taint [ 39.309647] BUG: Bad rss-counter state mm:00000000877a8563 type:MM_FILEPAGES val:33 [ 39.310776] BUG: Bad rss-counter state mm:00000000877a8563 type:MM_ANONPAGES val:22 [ 39.784790] BUG: Bad rss-counter state mm:000000000f1d7344 type:MM_FILEPAGES val:33 [ 39.785862] BUG: Bad rss-counter state mm:000000000f1d7344 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28226' (ECDSA) to the list of known hosts. 2023/06/20 07:47:24 fuzzer started 2023/06/20 07:47:24 dialing manager at localhost:44161 2023/06/20 07:47:24 checking machine... 2023/06/20 07:47:24 checking revisions... [ 40.510717] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:47:24 testing simple program... [ 40.560732] cgroup: Unknown subsys name 'net' [ 40.598296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:47:23 Registers: info registers vcpu 0 RAX=1ffffffff0bbf945 RBX=ffffffff85dfca2c RCX=ffffffff8180c584 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfca20 RSP=ffff8880146a7880 R8 =ffffffff86137508 R9 =ffff8880146a7978 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfca1c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f427a3e9900 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=00007ffea4210000 CR3=000000000de50000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fa77ab69010 CR3=000000000d820000 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=52a62b6a31966cb0134affe923eac13b XMM02=2c67c8bc2e329bc3000000000011dba8 XMM03=fb795ef6d65770560000000000124568 XMM04=c82c9a03ccae40b300000000000ae988 XMM05=e7a3b750822471340000000000135178 XMM06=5e4db97330a936660000000000134350 XMM07=e042d86d42eb936e0000000000124840 XMM08=b7c449c9338396bf000000000011dc08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000