syzkaller login: [ 30.520811] BUG: Bad rss-counter state mm:000000006a4f053e type:MM_FILEPAGES val:33 [ 30.521973] BUG: Bad rss-counter state mm:000000006a4f053e type:MM_ANONPAGES val:22 [ 30.558317] ================================================================== [ 30.559300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.560229] Read of size 8 at addr ffff8880094d1c20 by task sshd/221 [ 30.561056] [ 30.561275] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.562135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.563118] Call Trace: [ 30.563439] [ 30.563721] dump_stack_lvl+0x91/0xf0 [ 30.564204] print_report+0xcc/0x620 [ 30.564680] ? __virt_addr_valid+0x102/0x340 [ 30.565227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.565850] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.566465] kasan_report+0xbe/0xf0 [ 30.566933] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.567551] vma_interval_tree_remove+0xc75/0xec0 [ 30.568148] vma_prepare+0xc54/0x11a0 [ 30.568630] __split_vma+0x5af/0x950 [ 30.569100] ? __pfx___split_vma+0x10/0x10 [ 30.569626] ? find_held_lock+0x2c/0x110 [ 30.570149] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.570709] ? lock_is_held_type+0x9f/0x120 [ 30.571239] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.571836] ? mtree_range_walk+0x632/0x900 [ 30.572381] ? mas_walk+0x5c7/0x7c0 [ 30.572851] do_vmi_munmap+0x1f1/0x2b0 [ 30.573339] mmap_region+0x1f9/0x2660 [ 30.573848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.574359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.575064] ? __pfx_lock_acquire+0x10/0x10 [ 30.575588] ? __pfx_mmap_region+0x10/0x10 [ 30.576112] ? security_mmap_addr+0x7d/0xa0 [ 30.576640] ? get_unmapped_area+0x1f5/0x3f0 [ 30.577183] do_mmap+0x854/0xf00 [ 30.577620] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.578121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.578677] ksys_mmap_pgoff+0x3af/0x500 [ 30.579179] do_syscall_64+0x3f/0x90 [ 30.579657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.580302] RIP: 0033:0x7f0a3a09ad82 [ 30.580756] 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 [ 30.582880] RSP: 002b:00007ffd025b0248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.583779] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a3a09ad82 [ 30.584628] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a394d4000 [ 30.585466] RBP: 00007f0a394d4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.586341] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636ed51bec0 [ 30.587189] R13: 00007ffd025b0260 R14: 00007ffd025b0290 R15: 00007ffd025b05f0 [ 30.588047] [ 30.588337] [ 30.588559] Allocated by task 214: [ 30.588994] kasan_save_stack+0x22/0x50 [ 30.589492] kasan_set_track+0x25/0x30 [ 30.589989] __kasan_slab_alloc+0x59/0x70 [ 30.590512] kmem_cache_alloc+0x16b/0x370 [ 30.591025] vm_area_dup+0x20/0x160 [ 30.591480] __split_vma+0x170/0x950 [ 30.591946] split_vma+0xc6/0x110 [ 30.592384] mprotect_fixup+0x8d2/0xb30 [ 30.592886] do_mprotect_pkey+0x87e/0xd40 [ 30.593412] __x64_sys_mprotect+0x78/0xc0 [ 30.593950] do_syscall_64+0x3f/0x90 [ 30.594429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.595074] [ 30.595292] Freed by task 214: [ 30.595684] kasan_save_stack+0x22/0x50 [ 30.596191] kasan_set_track+0x25/0x30 [ 30.596686] kasan_save_free_info+0x2b/0x50 [ 30.597220] __kasan_slab_free+0x10a/0x190 [ 30.597755] kmem_cache_free+0x10d/0x4d0 [ 30.598260] rcu_core+0x8c8/0x2860 [ 30.598707] __do_softirq+0x1b7/0x7d4 [ 30.599185] [ 30.599406] Last potentially related work creation: [ 30.599997] kasan_save_stack+0x22/0x50 [ 30.600498] __kasan_record_aux_stack+0x8e/0xa0 [ 30.601072] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.601726] remove_vma+0x139/0x170 [ 30.602177] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.602732] do_vmi_munmap+0x1f1/0x2b0 [ 30.603215] __vm_munmap+0x138/0x3a0 [ 30.603679] __x64_sys_munmap+0x59/0x80 [ 30.604179] do_syscall_64+0x3f/0x90 [ 30.604653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.605294] [ 30.605509] Second to last potentially related work creation: [ 30.606212] kasan_save_stack+0x22/0x50 [ 30.606715] __kasan_record_aux_stack+0x8e/0xa0 [ 30.607289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.607936] remove_vma+0x139/0x170 [ 30.608390] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.608948] do_vmi_munmap+0x1f1/0x2b0 [ 30.609442] mmap_region+0x1f9/0x2660 [ 30.609929] do_mmap+0x854/0xf00 [ 30.610362] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.610849] ksys_mmap_pgoff+0x3af/0x500 [ 30.611348] do_syscall_64+0x3f/0x90 [ 30.611822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.612463] [ 30.612681] The buggy address belongs to the object at ffff8880094d1bc8 [ 30.612681] which belongs to the cache vm_area_struct of size 168 [ 30.614154] The buggy address is located 88 bytes inside of [ 30.614154] freed 168-byte region [ffff8880094d1bc8, ffff8880094d1c70) [ 30.615545] [ 30.615763] The buggy address belongs to the physical page: [ 30.616413] page:0000000044cd91fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94d1 [ 30.617486] memcg:ffff88800efd9901 [ 30.617923] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.618611] page_type: 0xffffffff() [ 30.619063] raw: 0100000000000200 ffff8880087a0c80 ffffea0000391900 dead000000000005 [ 30.619976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efd9901 [ 30.620875] page dumped because: kasan: bad access detected [ 30.621533] [ 30.621755] Memory state around the buggy address: [ 30.622326] ffff8880094d1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.623178] ffff8880094d1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.624022] >ffff8880094d1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.624854] ^ [ 30.625381] ffff8880094d1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.626250] ffff8880094d1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.627088] ================================================================== [ 30.628270] Disabling lock debugging due to kernel taint [ 32.603294] BUG: Bad rss-counter state mm:000000005e71fe7f type:MM_FILEPAGES val:33 [ 32.604433] BUG: Bad rss-counter state mm:000000005e71fe7f type:MM_ANONPAGES val:22 [ 33.070440] BUG: Bad rss-counter state mm:00000000df4c3eeb type:MM_FILEPAGES val:33 [ 33.071717] BUG: Bad rss-counter state mm:00000000df4c3eeb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19114' (ECDSA) to the list of known hosts. 2023/06/20 17:00:37 fuzzer started 2023/06/20 17:00:37 dialing manager at localhost:36067 2023/06/20 17:00:37 checking machine... 2023/06/20 17:00:37 checking revisions... [ 33.782133] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:00:37 testing simple program... [ 33.840512] cgroup: Unknown subsys name 'net' [ 33.882153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:00:37 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=ffff888008c04000 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=00007f50411a0380 CR3=000000000c662000 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=2037333a30303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a30303a3731203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000000 RCX=ffffffff81704cbc RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffffff849f0540 RSP=ffff888015fafac0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000024 R13=000000000000000c R14=ffff888015fafbb8 R15=00007ffcfcc56114 RIP=ffffffff814c0408 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 00007f3318b59900 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=00007f3319110618 CR3=000000000e9f2000 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=563412feff00545000000000000080fe 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