syzkaller login: [ 35.085980] BUG: Bad rss-counter state mm:00000000d08e4fd8 type:MM_FILEPAGES val:33 [ 35.087275] BUG: Bad rss-counter state mm:00000000d08e4fd8 type:MM_ANONPAGES val:22 [ 35.130127] ================================================================== [ 35.130882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.131632] Read of size 8 at addr ffff8880168d6228 by task sshd/224 [ 35.132250] [ 35.132437] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.133131] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.133903] Call Trace: [ 35.134148] [ 35.134379] dump_stack_lvl+0x91/0xf0 [ 35.134781] print_report+0xcc/0x620 [ 35.135160] ? __virt_addr_valid+0x102/0x340 [ 35.135600] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.136085] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.136595] kasan_report+0xbe/0xf0 [ 35.136983] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.137474] vma_interval_tree_remove+0xc75/0xec0 [ 35.137958] vma_prepare+0xc54/0x11a0 [ 35.138361] __split_vma+0x5af/0x950 [ 35.138728] ? __pfx___split_vma+0x10/0x10 [ 35.139142] ? find_held_lock+0x2c/0x110 [ 35.139542] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.139928] ? lock_is_held_type+0x9f/0x120 [ 35.140303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.140724] ? mtree_range_walk+0x632/0x900 [ 35.141096] ? mas_walk+0x5c7/0x7c0 [ 35.141423] do_vmi_munmap+0x1f1/0x2b0 [ 35.141754] mmap_region+0x1f9/0x2660 [ 35.142081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.142435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.142922] ? __pfx_lock_acquire+0x10/0x10 [ 35.143285] ? __pfx_mmap_region+0x10/0x10 [ 35.143643] ? security_mmap_addr+0x7d/0xa0 [ 35.144001] ? get_unmapped_area+0x1f5/0x3f0 [ 35.144391] do_mmap+0x854/0xf00 [ 35.144688] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.145024] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.145422] ksys_mmap_pgoff+0x3af/0x500 [ 35.145788] do_syscall_64+0x3f/0x90 [ 35.146126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.146581] RIP: 0033:0x7fc5cfd44d82 [ 35.146891] 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 [ 35.148354] RSP: 002b:00007ffd22110718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.148975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5cfd44d82 [ 35.149548] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5cf17e000 [ 35.150138] RBP: 00007fc5cf17e000 R08: 0000000000000009 R09: 0000000000001000 [ 35.150758] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556cdffbfec0 [ 35.151328] R13: 00007ffd22110730 R14: 00007ffd22110760 R15: 00007ffd22110ac0 [ 35.151918] [ 35.152123] [ 35.152273] Allocated by task 217: [ 35.152560] kasan_save_stack+0x22/0x50 [ 35.152903] kasan_set_track+0x25/0x30 [ 35.153231] __kasan_slab_alloc+0x59/0x70 [ 35.153582] kmem_cache_alloc+0x16b/0x370 [ 35.153926] vm_area_dup+0x20/0x160 [ 35.154223] __split_vma+0x170/0x950 [ 35.154537] split_vma+0xc6/0x110 [ 35.154831] mprotect_fixup+0x8d2/0xb30 [ 35.155169] do_mprotect_pkey+0x87e/0xd40 [ 35.155533] __x64_sys_mprotect+0x78/0xc0 [ 35.155885] do_syscall_64+0x3f/0x90 [ 35.156209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.156643] [ 35.156792] Freed by task 217: [ 35.157067] kasan_save_stack+0x22/0x50 [ 35.157407] kasan_set_track+0x25/0x30 [ 35.157741] kasan_save_free_info+0x2b/0x50 [ 35.158103] __kasan_slab_free+0x10a/0x190 [ 35.158476] kmem_cache_free+0x10d/0x4d0 [ 35.158824] rcu_core+0x8c8/0x2860 [ 35.159129] __do_softirq+0x1b7/0x7d4 [ 35.159459] [ 35.159599] Last potentially related work creation: [ 35.160007] kasan_save_stack+0x22/0x50 [ 35.160346] __kasan_record_aux_stack+0x8e/0xa0 [ 35.160735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.161168] remove_vma+0x139/0x170 [ 35.161477] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.161852] do_vmi_munmap+0x1f1/0x2b0 [ 35.162180] __vm_munmap+0x138/0x3a0 [ 35.162511] __x64_sys_munmap+0x59/0x80 [ 35.162839] do_syscall_64+0x3f/0x90 [ 35.163154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.163585] [ 35.163740] The buggy address belongs to the object at ffff8880168d61d0 [ 35.163740] which belongs to the cache vm_area_struct of size 168 [ 35.164737] The buggy address is located 88 bytes inside of [ 35.164737] freed 168-byte region [ffff8880168d61d0, ffff8880168d6278) [ 35.165676] [ 35.165818] The buggy address belongs to the physical page: [ 35.166261] page:0000000070073f90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168d6 [ 35.167015] memcg:ffff888010300601 [ 35.167303] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.167742] page_type: 0xffffffff() [ 35.168049] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.168683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010300601 [ 35.169292] page dumped because: kasan: bad access detected [ 35.169741] [ 35.169881] Memory state around the buggy address: [ 35.170279] ffff8880168d6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.170874] ffff8880168d6180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.171451] >ffff8880168d6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.172036] ^ [ 35.172415] ffff8880168d6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.172995] ffff8880168d6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.173565] ================================================================== [ 35.174493] Disabling lock debugging due to kernel taint [ 37.821384] BUG: Bad rss-counter state mm:00000000c3920983 type:MM_FILEPAGES val:33 [ 37.822644] BUG: Bad rss-counter state mm:00000000c3920983 type:MM_ANONPAGES val:22 [ 38.287329] BUG: Bad rss-counter state mm:000000008a3247b8 type:MM_FILEPAGES val:33 [ 38.288487] BUG: Bad rss-counter state mm:000000008a3247b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5358' (ECDSA) to the list of known hosts. 2023/06/21 06:15:03 fuzzer started 2023/06/21 06:15:03 dialing manager at localhost:36067 2023/06/21 06:15:03 checking machine... 2023/06/21 06:15:03 checking revisions... [ 38.929427] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:15:03 testing simple program... [ 38.970818] cgroup: Unknown subsys name 'net' [ 39.020255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:15:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ed1f370 RCX=0000000000000003 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88800ed1f328 RBP=ffff88801643b680 RSP=ffff88800ed1f280 R8 =0000000000000006 R9 =0000000000000000 R10=ffff88800ed1f2d8 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800ed1f300 R14=ffff88801643b680 R15=ffff88800ed1f2d8 RIP=ffffffff84513442 RFL=00000206 [-----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 00007f6a117cd900 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=00007f6a11d84618 CR3=000000000d690000 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=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 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=00007f35d03005c0 CR3=0000000013a28000 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=84def97a467548988f4eb682ebe18790 XMM02=2c67c8bc2e329bc3000000000011dbc0 XMM03=fb795ef6d65770560000000000122f18 XMM04=b56bbb54479af84300000000000ae988 XMM05=3f3f84fef0cf291f0000000000133c78 XMM06=993088549562ad0300000000001329a8 XMM07=e042d86d42eb936e00000000001231f0 XMM08=b4001ee0ba709b8b000000000011dc20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000