syzkaller login: [ 50.406762] BUG: Bad rss-counter state mm:000000005b8f8a67 type:MM_FILEPAGES val:33 [ 50.407551] BUG: Bad rss-counter state mm:000000005b8f8a67 type:MM_ANONPAGES val:22 [ 50.437659] ================================================================== [ 50.438479] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.439323] Read of size 8 at addr ffff8880179db4e0 by task sshd/226 [ 50.439980] [ 50.440141] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.440860] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.441983] Call Trace: [ 50.442218] [ 50.442424] dump_stack_lvl+0x91/0xf0 [ 50.442811] print_report+0xcc/0x620 [ 50.443160] ? __virt_addr_valid+0x102/0x340 [ 50.443591] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.444065] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.444535] kasan_report+0xbe/0xf0 [ 50.444883] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.445363] vma_interval_tree_remove+0xc75/0xec0 [ 50.445821] vma_prepare+0xc54/0x11a0 [ 50.446177] __split_vma+0x5af/0x950 [ 50.446522] ? __pfx___split_vma+0x10/0x10 [ 50.446902] ? find_held_lock+0x2c/0x110 [ 50.447285] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.447729] ? lock_is_held_type+0x9f/0x120 [ 50.448119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.448580] ? mtree_range_walk+0x632/0x900 [ 50.449013] ? mas_walk+0x5c7/0x7c0 [ 50.449366] do_vmi_munmap+0x1f1/0x2b0 [ 50.449760] mmap_region+0x1f9/0x2660 [ 50.450110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.450502] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.451042] ? __pfx_lock_acquire+0x10/0x10 [ 50.451432] ? __pfx_mmap_region+0x10/0x10 [ 50.451821] ? security_mmap_addr+0x7d/0xa0 [ 50.452210] ? get_unmapped_area+0x1f5/0x3f0 [ 50.452640] do_mmap+0x854/0xf00 [ 50.452962] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.453333] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.453790] ksys_mmap_pgoff+0x3af/0x500 [ 50.454166] do_syscall_64+0x3f/0x90 [ 50.454511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.454983] RIP: 0033:0x7f2d43f7cd82 [ 50.455327] 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 [ 50.456873] RSP: 002b:00007fffc76d4da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.457597] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d43f7cd82 [ 50.458210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d433b6000 [ 50.458697] RBP: 00007f2d433b6000 R08: 0000000000000009 R09: 0000000000001000 [ 50.459174] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561bea6cb20 [ 50.459638] R13: 00007fffc76d4dc0 R14: 00007fffc76d4df0 R15: 00007fffc76d5150 [ 50.460104] [ 50.460261] [ 50.460381] Allocated by task 219: [ 50.460614] kasan_save_stack+0x22/0x50 [ 50.460892] kasan_set_track+0x25/0x30 [ 50.461161] __kasan_slab_alloc+0x59/0x70 [ 50.461450] kmem_cache_alloc+0x16b/0x370 [ 50.461747] vm_area_dup+0x20/0x160 [ 50.461994] __split_vma+0x170/0x950 [ 50.462250] split_vma+0xc6/0x110 [ 50.462488] mprotect_fixup+0x8d2/0xb30 [ 50.462790] do_mprotect_pkey+0x87e/0xd40 [ 50.463075] __x64_sys_mprotect+0x78/0xc0 [ 50.463361] do_syscall_64+0x3f/0x90 [ 50.463632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.464016] [ 50.464132] Freed by task 13: [ 50.464340] kasan_save_stack+0x22/0x50 [ 50.464617] kasan_set_track+0x25/0x30 [ 50.464888] kasan_save_free_info+0x2b/0x50 [ 50.465212] __kasan_slab_free+0x10a/0x190 [ 50.465505] kmem_cache_free+0x10d/0x4d0 [ 50.465891] rcu_core+0x8c8/0x2860 [ 50.466214] __do_softirq+0x1b7/0x7d4 [ 50.466550] [ 50.466704] Last potentially related work creation: [ 50.467128] kasan_save_stack+0x22/0x50 [ 50.467485] __kasan_record_aux_stack+0x8e/0xa0 [ 50.467920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.468368] remove_vma+0x139/0x170 [ 50.468707] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.469126] do_vmi_munmap+0x1f1/0x2b0 [ 50.469469] __vm_munmap+0x138/0x3a0 [ 50.469832] __x64_sys_munmap+0x59/0x80 [ 50.470183] do_syscall_64+0x3f/0x90 [ 50.470521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.470977] [ 50.471129] The buggy address belongs to the object at ffff8880179db488 [ 50.471129] which belongs to the cache vm_area_struct of size 168 [ 50.472190] The buggy address is located 88 bytes inside of [ 50.472190] freed 168-byte region [ffff8880179db488, ffff8880179db530) [ 50.473184] [ 50.473342] The buggy address belongs to the physical page: [ 50.473826] page:00000000f14a0f1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x179db [ 50.474603] memcg:ffff88800fc2c501 [ 50.474906] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.475369] page_type: 0xffffffff() [ 50.475715] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.476359] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc2c501 [ 50.477037] page dumped because: kasan: bad access detected [ 50.477507] [ 50.477672] Memory state around the buggy address: [ 50.478085] ffff8880179db380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.478694] ffff8880179db400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 50.479377] >ffff8880179db480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.479979] ^ [ 50.480519] ffff8880179db500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 50.481147] ffff8880179db580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.481799] ================================================================== [ 50.482532] Disabling lock debugging due to kernel taint [ 52.050817] BUG: Bad rss-counter state mm:0000000000b0816d type:MM_FILEPAGES val:33 [ 52.051599] BUG: Bad rss-counter state mm:0000000000b0816d type:MM_ANONPAGES val:22 [ 52.370523] BUG: Bad rss-counter state mm:00000000ad3d7a52 type:MM_FILEPAGES val:33 [ 52.371205] BUG: Bad rss-counter state mm:00000000ad3d7a52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61136' (ECDSA) to the list of known hosts. 2023/06/20 09:15:22 fuzzer started 2023/06/20 09:15:23 dialing manager at localhost:44161 2023/06/20 09:15:23 checking machine... 2023/06/20 09:15:23 checking revisions... [ 52.991307] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:15:23 testing simple program... [ 53.028586] cgroup: Unknown subsys name 'net' [ 53.070060] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:15:11 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000293 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff8582fb40 RBP=ffffffff8452fffc RSP=ffff88801789f5d0 R8 =0000000000000000 R9 =fffffbfff0b05f68 R10=ffffffff8582fb43 R11=00000000000b6996 R12=ffff888017a51818 R13=ffff8880068e3438 R14=ffff888017a51710 R15=0000000000000000 RIP=ffffffff81534237 RFL=00000002 [-------] 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 00007f875cd15700 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=00007f450a0e28b0 CR3=000000000b9f8000 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=00007f778ba6a5100000562a9cc86790 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=0000000080010000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800dd59b40 RSI=ffffffff813c918d RDI=0000000000000005 RBP=ffff88806cf2c250 RSP=ffff888019c37d18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88806cf2c250 R13=ffff88806cf2c240 R14=ffff888019c37f58 R15=dffffc0000000000 RIP=ffffffff813c918d 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f11c792a900 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=00007ffd517d0000 CR3=000000000f18e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=1f6145696d7245550d012e232e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000