syzkaller login: [ 31.235372] BUG: Bad rss-counter state mm:00000000459b5575 type:MM_FILEPAGES val:33 [ 31.236920] BUG: Bad rss-counter state mm:00000000459b5575 type:MM_ANONPAGES val:22 [ 31.389092] ================================================================== [ 31.390004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.390934] Read of size 8 at addr ffff88800e4ee228 by task sshd/220 [ 31.391693] [ 31.391912] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.392947] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.393932] Call Trace: [ 31.394250] [ 31.394558] dump_stack_lvl+0x91/0xf0 [ 31.395055] print_report+0xcc/0x620 [ 31.395540] ? __virt_addr_valid+0x102/0x340 [ 31.396091] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.396712] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.397340] kasan_report+0xbe/0xf0 [ 31.397814] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398431] vma_interval_tree_remove+0xc75/0xec0 [ 31.399032] vma_prepare+0xc54/0x11a0 [ 31.399502] __split_vma+0x5af/0x950 [ 31.399974] ? __pfx___split_vma+0x10/0x10 [ 31.400503] ? find_held_lock+0x2c/0x110 [ 31.401050] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.401620] ? lock_is_held_type+0x9f/0x120 [ 31.402157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.402758] ? mtree_range_walk+0x632/0x900 [ 31.403310] ? mas_walk+0x5c7/0x7c0 [ 31.403794] do_vmi_munmap+0x1f1/0x2b0 [ 31.404287] mmap_region+0x1f9/0x2660 [ 31.404763] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.405279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.405994] ? __pfx_lock_acquire+0x10/0x10 [ 31.406524] ? __pfx_mmap_region+0x10/0x10 [ 31.407056] ? security_mmap_addr+0x7d/0xa0 [ 31.407586] ? get_unmapped_area+0x1f5/0x3f0 [ 31.408136] do_mmap+0x854/0xf00 [ 31.408573] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.409076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.409634] ksys_mmap_pgoff+0x3af/0x500 [ 31.410140] do_syscall_64+0x3f/0x90 [ 31.410619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411267] RIP: 0033:0x7f3f22780d82 [ 31.411720] 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 [ 31.413869] RSP: 002b:00007ffc165b9a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.414778] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f22780d82 [ 31.415621] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f21bba000 [ 31.416457] RBP: 00007f3f21bba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.417312] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602f8508ec0 [ 31.418156] R13: 00007ffc165b9a80 R14: 00007ffc165b9ab0 R15: 00007ffc165b9e10 [ 31.419016] [ 31.419313] [ 31.419531] Allocated by task 213: [ 31.419963] kasan_save_stack+0x22/0x50 [ 31.420461] kasan_set_track+0x25/0x30 [ 31.420951] __kasan_slab_alloc+0x59/0x70 [ 31.421492] kmem_cache_alloc+0x16b/0x370 [ 31.422001] vm_area_dup+0x20/0x160 [ 31.422454] __split_vma+0x170/0x950 [ 31.422917] split_vma+0xc6/0x110 [ 31.423351] mprotect_fixup+0x8d2/0xb30 [ 31.423855] do_mprotect_pkey+0x87e/0xd40 [ 31.424372] __x64_sys_mprotect+0x78/0xc0 [ 31.424896] do_syscall_64+0x3f/0x90 [ 31.425381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.426020] [ 31.426232] Freed by task 213: [ 31.426618] kasan_save_stack+0x22/0x50 [ 31.427121] kasan_set_track+0x25/0x30 [ 31.427609] kasan_save_free_info+0x2b/0x50 [ 31.428143] __kasan_slab_free+0x10a/0x190 [ 31.428672] kmem_cache_free+0x10d/0x4d0 [ 31.429205] rcu_core+0x8c8/0x2860 [ 31.429648] __do_softirq+0x1b7/0x7d4 [ 31.430132] [ 31.430345] Last potentially related work creation: [ 31.430929] kasan_save_stack+0x22/0x50 [ 31.431432] __kasan_record_aux_stack+0x8e/0xa0 [ 31.432008] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.432663] remove_vma+0x139/0x170 [ 31.433126] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.433757] do_vmi_munmap+0x1f1/0x2b0 [ 31.434242] __vm_munmap+0x138/0x3a0 [ 31.434703] __x64_sys_munmap+0x59/0x80 [ 31.435197] do_syscall_64+0x3f/0x90 [ 31.435667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.436307] [ 31.436522] Second to last potentially related work creation: [ 31.437210] kasan_save_stack+0x22/0x50 [ 31.437714] __kasan_record_aux_stack+0x8e/0xa0 [ 31.438284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.438935] remove_vma+0x139/0x170 [ 31.439384] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.439946] do_vmi_munmap+0x1f1/0x2b0 [ 31.440424] mmap_region+0x1f9/0x2660 [ 31.440901] do_mmap+0x854/0xf00 [ 31.441338] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.441825] ksys_mmap_pgoff+0x3af/0x500 [ 31.442350] do_syscall_64+0x3f/0x90 [ 31.442830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.443476] [ 31.443693] The buggy address belongs to the object at ffff88800e4ee1d0 [ 31.443693] which belongs to the cache vm_area_struct of size 168 [ 31.445155] The buggy address is located 88 bytes inside of [ 31.445155] freed 168-byte region [ffff88800e4ee1d0, ffff88800e4ee278) [ 31.446573] [ 31.446792] The buggy address belongs to the physical page: [ 31.447463] page:000000003c0cd1d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4ee [ 31.448565] memcg:ffff88800e23ec01 [ 31.448990] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.449656] page_type: 0xffffffff() [ 31.450113] raw: 0100000000000200 ffff8880087a0c80 ffffea0000394300 dead000000000008 [ 31.451034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e23ec01 [ 31.451938] page dumped because: kasan: bad access detected [ 31.452605] [ 31.452825] Memory state around the buggy address: [ 31.453413] ffff88800e4ee100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.454277] ffff88800e4ee180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.455136] >ffff88800e4ee200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.455987] ^ [ 31.456540] ffff88800e4ee280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.457415] ffff88800e4ee300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.458282] ================================================================== [ 31.459208] Disabling lock debugging due to kernel taint [ 34.204827] BUG: Bad rss-counter state mm:00000000c1a0080a type:MM_FILEPAGES val:33 [ 34.205648] BUG: Bad rss-counter state mm:00000000c1a0080a type:MM_ANONPAGES val:22 [ 34.630480] BUG: Bad rss-counter state mm:000000008ee2cf07 type:MM_FILEPAGES val:33 [ 34.631291] BUG: Bad rss-counter state mm:000000008ee2cf07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30279' (ECDSA) to the list of known hosts. 2023/06/20 14:44:28 fuzzer started 2023/06/20 14:44:29 dialing manager at localhost:36067 2023/06/20 14:44:29 checking machine... 2023/06/20 14:44:29 checking revisions... [ 35.306987] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:44:29 testing simple program... [ 35.354260] cgroup: Unknown subsys name 'net' [ 35.413748] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:44:28 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=0000000000000001 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=00007ffe1c250388 CR3=0000000005482000 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=00007f2e67b115100000560b074cd790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001bce769 RBX=ffff88800de73b18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800de73b48 RBP=ffff888013f8b490 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888013f8b318 R14=ffffffff813782f8 R15=ffff88800eef1380 RIP=ffffffff818464e2 RFL=00000046 [---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 00007fcd5dbc7900 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=00007fcd5e17e618 CR3=000000000f0d4000 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=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