syzkaller login: [ 34.463804] BUG: Bad rss-counter state mm:0000000048f858e5 type:MM_FILEPAGES val:33 [ 34.464986] BUG: Bad rss-counter state mm:0000000048f858e5 type:MM_ANONPAGES val:22 [ 34.504163] ================================================================== [ 34.505154] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.506106] Read of size 8 at addr ffff88801657ca50 by task sshd/220 [ 34.506886] [ 34.507104] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.507992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.508975] Call Trace: [ 34.509296] [ 34.509579] dump_stack_lvl+0x91/0xf0 [ 34.510073] print_report+0xcc/0x620 [ 34.510557] ? __virt_addr_valid+0x102/0x340 [ 34.511115] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.511749] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.512369] kasan_report+0xbe/0xf0 [ 34.512848] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.513472] vma_interval_tree_remove+0xc75/0xec0 [ 34.514074] vma_prepare+0xc54/0x11a0 [ 34.514555] __split_vma+0x5af/0x950 [ 34.515027] ? __pfx___split_vma+0x10/0x10 [ 34.515581] ? find_held_lock+0x2c/0x110 [ 34.516103] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.516680] ? lock_is_held_type+0x9f/0x120 [ 34.517219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.517829] ? mtree_range_walk+0x632/0x900 [ 34.518376] ? mas_walk+0x5c7/0x7c0 [ 34.518847] do_vmi_munmap+0x1f1/0x2b0 [ 34.519333] mmap_region+0x1f9/0x2660 [ 34.519829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.520350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.521062] ? __pfx_lock_acquire+0x10/0x10 [ 34.521603] ? __pfx_mmap_region+0x10/0x10 [ 34.522137] ? security_mmap_addr+0x7d/0xa0 [ 34.522674] ? get_unmapped_area+0x1f5/0x3f0 [ 34.523231] do_mmap+0x854/0xf00 [ 34.523692] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.524194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.524764] ksys_mmap_pgoff+0x3af/0x500 [ 34.525277] do_syscall_64+0x3f/0x90 [ 34.525765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.526413] RIP: 0033:0x7f8568195d82 [ 34.526874] 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 [ 34.529019] RSP: 002b:00007ffdc09e5c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.529935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8568195d82 [ 34.530793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85675cf000 [ 34.531654] RBP: 00007f85675cf000 R08: 0000000000000009 R09: 0000000000001000 [ 34.532516] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e4e7aeec0 [ 34.533362] R13: 00007ffdc09e5c30 R14: 00007ffdc09e5c60 R15: 00007ffdc09e5fc0 [ 34.534230] [ 34.534523] [ 34.534742] Allocated by task 213: [ 34.535172] kasan_save_stack+0x22/0x50 [ 34.535712] kasan_set_track+0x25/0x30 [ 34.536210] __kasan_slab_alloc+0x59/0x70 [ 34.536733] kmem_cache_alloc+0x16b/0x370 [ 34.537250] vm_area_dup+0x20/0x160 [ 34.537708] __split_vma+0x170/0x950 [ 34.538186] split_vma+0xc6/0x110 [ 34.538630] mprotect_fixup+0x8d2/0xb30 [ 34.539132] do_mprotect_pkey+0x87e/0xd40 [ 34.539667] __x64_sys_mprotect+0x78/0xc0 [ 34.540188] do_syscall_64+0x3f/0x90 [ 34.540667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.541323] [ 34.541537] Freed by task 213: [ 34.541928] kasan_save_stack+0x22/0x50 [ 34.542437] kasan_set_track+0x25/0x30 [ 34.542931] kasan_save_free_info+0x2b/0x50 [ 34.543469] __kasan_slab_free+0x10a/0x190 [ 34.544009] kmem_cache_free+0x10d/0x4d0 [ 34.544516] rcu_core+0x8c8/0x2860 [ 34.544967] __do_softirq+0x1b7/0x7d4 [ 34.545493] [ 34.545717] Last potentially related work creation: [ 34.546301] kasan_save_stack+0x22/0x50 [ 34.546804] __kasan_record_aux_stack+0x8e/0xa0 [ 34.547383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.548041] remove_vma+0x139/0x170 [ 34.548494] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.549050] do_vmi_munmap+0x1f1/0x2b0 [ 34.549538] __vm_munmap+0x138/0x3a0 [ 34.550006] __x64_sys_munmap+0x59/0x80 [ 34.550509] do_syscall_64+0x3f/0x90 [ 34.550979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.551633] [ 34.551858] The buggy address belongs to the object at ffff88801657c9f8 [ 34.551858] which belongs to the cache vm_area_struct of size 168 [ 34.553347] The buggy address is located 88 bytes inside of [ 34.553347] freed 168-byte region [ffff88801657c9f8, ffff88801657caa0) [ 34.554771] [ 34.554988] The buggy address belongs to the physical page: [ 34.555665] page:0000000079523af9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1657c [ 34.556757] memcg:ffff88801767c401 [ 34.557195] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.557847] page_type: 0xffffffff() [ 34.558299] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.559216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801767c401 [ 34.560125] page dumped because: kasan: bad access detected [ 34.560784] [ 34.561000] Memory state around the buggy address: [ 34.561582] ffff88801657c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.562441] ffff88801657c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.563303] >ffff88801657ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.564158] ^ [ 34.564867] ffff88801657ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.565726] ffff88801657cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.566583] ================================================================== [ 34.567816] Disabling lock debugging due to kernel taint [ 36.525679] BUG: Bad rss-counter state mm:000000005824ffc1 type:MM_FILEPAGES val:33 [ 36.526748] BUG: Bad rss-counter state mm:000000005824ffc1 type:MM_ANONPAGES val:22 [ 37.027686] BUG: Bad rss-counter state mm:00000000e8dee739 type:MM_FILEPAGES val:33 [ 37.029142] BUG: Bad rss-counter state mm:00000000e8dee739 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3457' (ECDSA) to the list of known hosts. 2023/06/20 10:26:14 fuzzer started 2023/06/20 10:26:14 dialing manager at localhost:44161 2023/06/20 10:26:14 checking machine... 2023/06/20 10:26:14 checking revisions... [ 37.778710] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:26:14 testing simple program... [ 37.835125] cgroup: Unknown subsys name 'net' [ 37.882435] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:26:11 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=ffff88806ce2c250 RCX=ffffffff813bdc01 RDX=ffff8880147d51c0 RSI=0000000000000000 RDI=0000000000000007 RBP=00000000000f4240 RSP=ffff88806ce09dc8 R8 =0000000000000007 R9 =0000000000000000 R10=00000008971d05c0 R11=0000000000000001 R12=00000008971d05c0 R13=7fffffffffffffff R14=0000000000000001 R15=00000008970dc380 RIP=ffffffff813bdc01 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 00007fa2ac60a900 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=00007fa2acbc1618 CR3=000000000ea5e000 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=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806cf09ee8 RBP=0000000000000001 RSP=ffff88806cf09e60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800e3e61b0 RIP=ffffffff8137fc2e 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 00007f65d168e700 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=00007f86eeee65c0 CR3=000000000c69a000 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=2033313a36323a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36323a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000