syzkaller login: [ 61.504995] BUG: Bad rss-counter state mm:000000004f515d42 type:MM_FILEPAGES val:33 [ 61.506010] BUG: Bad rss-counter state mm:000000004f515d42 type:MM_ANONPAGES val:22 [ 61.668427] ================================================================== [ 61.669338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.670294] Read of size 8 at addr ffff88800ef27a50 by task sshd/219 [ 61.671069] [ 61.671293] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.672282] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.673274] Call Trace: [ 61.673602] [ 61.673891] dump_stack_lvl+0x91/0xf0 [ 61.674394] print_report+0xcc/0x620 [ 61.674885] ? __virt_addr_valid+0x102/0x340 [ 61.675452] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.676112] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.676736] kasan_report+0xbe/0xf0 [ 61.677220] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.677860] vma_interval_tree_remove+0xc75/0xec0 [ 61.678471] vma_prepare+0xc54/0x11a0 [ 61.678965] __split_vma+0x5af/0x950 [ 61.679444] ? __pfx___split_vma+0x10/0x10 [ 61.679991] ? find_held_lock+0x2c/0x110 [ 61.680527] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.681089] ? lock_is_held_type+0x9f/0x120 [ 61.681640] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.682244] ? mtree_range_walk+0x632/0x900 [ 61.682801] ? mas_walk+0x5c7/0x7c0 [ 61.683286] do_vmi_munmap+0x1f1/0x2b0 [ 61.683793] mmap_region+0x1f9/0x2660 [ 61.684276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.684798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.685514] ? __pfx_lock_acquire+0x10/0x10 [ 61.686049] ? __pfx_mmap_region+0x10/0x10 [ 61.686579] ? security_mmap_addr+0x7d/0xa0 [ 61.687125] ? get_unmapped_area+0x1f5/0x3f0 [ 61.687698] do_mmap+0x854/0xf00 [ 61.688146] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.688653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.689226] ksys_mmap_pgoff+0x3af/0x500 [ 61.689749] do_syscall_64+0x3f/0x90 [ 61.690232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.690898] RIP: 0033:0x7f76bfb7fd82 [ 61.691353] 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 [ 61.693524] RSP: 002b:00007ffccc00b898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.694468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76bfb7fd82 [ 61.695330] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76befb9000 [ 61.696202] RBP: 00007f76befb9000 R08: 0000000000000009 R09: 0000000000001000 [ 61.697057] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c94f3a0980 [ 61.697898] R13: 00007ffccc00b8b0 R14: 00007ffccc00b8e0 R15: 00007ffccc00bc40 [ 61.698757] [ 61.699046] [ 61.699269] Allocated by task 212: [ 61.699710] kasan_save_stack+0x22/0x50 [ 61.700214] kasan_set_track+0x25/0x30 [ 61.700706] __kasan_slab_alloc+0x59/0x70 [ 61.701229] kmem_cache_alloc+0x16b/0x370 [ 61.701745] vm_area_dup+0x20/0x160 [ 61.702205] __split_vma+0x170/0x950 [ 61.702677] split_vma+0xc6/0x110 [ 61.703117] mprotect_fixup+0x8d2/0xb30 [ 61.703642] do_mprotect_pkey+0x87e/0xd40 [ 61.704169] __x64_sys_mprotect+0x78/0xc0 [ 61.704694] do_syscall_64+0x3f/0x90 [ 61.705179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.705829] [ 61.706047] Freed by task 212: [ 61.706445] kasan_save_stack+0x22/0x50 [ 61.706956] kasan_set_track+0x25/0x30 [ 61.707451] kasan_save_free_info+0x2b/0x50 [ 61.708005] __kasan_slab_free+0x10a/0x190 [ 61.708542] kmem_cache_free+0x10d/0x4d0 [ 61.709051] rcu_core+0x8c8/0x2860 [ 61.709495] __do_softirq+0x1b7/0x7d4 [ 61.709972] [ 61.710191] Last potentially related work creation: [ 61.710784] kasan_save_stack+0x22/0x50 [ 61.711291] __kasan_record_aux_stack+0x8e/0xa0 [ 61.711875] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.712525] remove_vma+0x139/0x170 [ 61.712981] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.713539] do_vmi_munmap+0x1f1/0x2b0 [ 61.714029] __vm_munmap+0x138/0x3a0 [ 61.714498] __x64_sys_munmap+0x59/0x80 [ 61.714995] do_syscall_64+0x3f/0x90 [ 61.715476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.716128] [ 61.716344] The buggy address belongs to the object at ffff88800ef279f8 [ 61.716344] which belongs to the cache vm_area_struct of size 168 [ 61.717827] The buggy address is located 88 bytes inside of [ 61.717827] freed 168-byte region [ffff88800ef279f8, ffff88800ef27aa0) [ 61.719243] [ 61.719478] The buggy address belongs to the physical page: [ 61.720138] page:00000000e508e2f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef27 [ 61.721229] memcg:ffff88800e3a4401 [ 61.721662] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.722361] page_type: 0xffffffff() [ 61.722811] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c1880 dead000000000005 [ 61.723745] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3a4401 [ 61.724656] page dumped because: kasan: bad access detected [ 61.725320] [ 61.725538] Memory state around the buggy address: [ 61.726119] ffff88800ef27900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.726982] ffff88800ef27980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 61.727852] >ffff88800ef27a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.728706] ^ [ 61.729407] ffff88800ef27a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 61.730268] ffff88800ef27b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.731127] ================================================================== [ 61.732189] Disabling lock debugging due to kernel taint [ 63.656728] BUG: Bad rss-counter state mm:00000000bff6fe4f type:MM_FILEPAGES val:33 [ 63.657677] BUG: Bad rss-counter state mm:00000000bff6fe4f type:MM_ANONPAGES val:22 [ 64.195935] BUG: Bad rss-counter state mm:00000000a2e3f4cb type:MM_FILEPAGES val:33 [ 64.197114] BUG: Bad rss-counter state mm:00000000a2e3f4cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26398' (ECDSA) to the list of known hosts. 2023/06/20 23:59:40 fuzzer started 2023/06/20 23:59:41 dialing manager at localhost:36067 2023/06/20 23:59:41 checking machine... 2023/06/20 23:59:41 checking revisions... [ 64.867884] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:59:41 testing simple program... [ 64.938923] cgroup: Unknown subsys name 'net' [ 64.986510] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:59:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800e2c79a0 RCX=ffffffff8613f401 RDX=1ffff11001c58f3f RSI=0000000000000000 RDI=ffffffff818475d2 RBP=ffff88800e2c79f8 RSP=ffff88800e2c7988 R8 =ffffffff8613f412 R9 =ffff88800e2c79e0 R10=0000000000038001 R11=0000000000021e7d R12=ffff88800e2c7a68 R13=0000000000000000 R14=ffff8880159751c0 R15=ffff88800f045e40 RIP=ffffffff811303b2 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 00007f3852e2c900 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=00007ffc13160000 CR3=0000000009642000 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=0000000000000000 RBX=ffff88806cf09b18 RCX=0000000000000001 RDX=1ffff1100d9e1365 RSI=ffffffff81809a91 RDI=ffff88806cf09b28 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a30 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff888008cd4200 RIP=ffffffff813ad496 RFL=00000286 [--S--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 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=00007efc84600cb0 CR3=000000000ea06000 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=2030343a39353a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a39353a3332203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000