syzkaller login: [ 35.858216] BUG: Bad rss-counter state mm:000000000ea8e348 type:MM_FILEPAGES val:33 [ 35.860037] BUG: Bad rss-counter state mm:000000000ea8e348 type:MM_ANONPAGES val:22 [ 36.028034] ================================================================== [ 36.029124] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.030239] Read of size 8 at addr ffff88800eb1a228 by task sshd/220 [ 36.031394] [ 36.031669] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.032716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.033896] Call Trace: [ 36.034313] [ 36.034652] dump_stack_lvl+0x91/0xf0 [ 36.035249] print_report+0xcc/0x620 [ 36.035746] ? __virt_addr_valid+0x102/0x340 [ 36.036312] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.036940] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.037566] kasan_report+0xbe/0xf0 [ 36.038038] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.038674] vma_interval_tree_remove+0xc75/0xec0 [ 36.039276] vma_prepare+0xc54/0x11a0 [ 36.039755] __split_vma+0x5af/0x950 [ 36.040238] ? __pfx___split_vma+0x10/0x10 [ 36.040768] ? find_held_lock+0x2c/0x110 [ 36.041292] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.041863] ? lock_is_held_type+0x9f/0x120 [ 36.042414] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.043017] ? mtree_range_walk+0x632/0x900 [ 36.043580] ? mas_walk+0x5c7/0x7c0 [ 36.044059] do_vmi_munmap+0x1f1/0x2b0 [ 36.044552] mmap_region+0x1f9/0x2660 [ 36.045031] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.045580] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.046311] ? __pfx_lock_acquire+0x10/0x10 [ 36.046849] ? __pfx_mmap_region+0x10/0x10 [ 36.047383] ? security_mmap_addr+0x7d/0xa0 [ 36.047918] ? get_unmapped_area+0x1f5/0x3f0 [ 36.048480] do_mmap+0x854/0xf00 [ 36.048938] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.049442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.050007] ksys_mmap_pgoff+0x3af/0x500 [ 36.050530] do_syscall_64+0x3f/0x90 [ 36.051017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.051682] RIP: 0033:0x7f413caf5d82 [ 36.052151] 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 [ 36.054340] RSP: 002b:00007fff09833328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.055244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f413caf5d82 [ 36.056090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f413bf2f000 [ 36.056935] RBP: 00007f413bf2f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.057793] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b728638d90 [ 36.058656] R13: 00007fff09833340 R14: 00007fff09833370 R15: 00007fff098336d0 [ 36.059515] [ 36.059808] [ 36.060022] Allocated by task 213: [ 36.060462] kasan_save_stack+0x22/0x50 [ 36.060988] kasan_set_track+0x25/0x30 [ 36.061485] __kasan_slab_alloc+0x59/0x70 [ 36.062011] kmem_cache_alloc+0x16b/0x370 [ 36.062558] vm_area_dup+0x20/0x160 [ 36.063015] __split_vma+0x170/0x950 [ 36.063486] split_vma+0xc6/0x110 [ 36.063923] mprotect_fixup+0x8d2/0xb30 [ 36.064429] do_mprotect_pkey+0x87e/0xd40 [ 36.064956] __x64_sys_mprotect+0x78/0xc0 [ 36.065476] do_syscall_64+0x3f/0x90 [ 36.065956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.066622] [ 36.066837] Freed by task 213: [ 36.067232] kasan_save_stack+0x22/0x50 [ 36.067747] kasan_set_track+0x25/0x30 [ 36.068237] kasan_save_free_info+0x2b/0x50 [ 36.068773] __kasan_slab_free+0x10a/0x190 [ 36.069305] kmem_cache_free+0x10d/0x4d0 [ 36.069814] rcu_core+0x8c8/0x2860 [ 36.070268] __do_softirq+0x1b7/0x7d4 [ 36.070759] [ 36.070973] Last potentially related work creation: [ 36.071608] kasan_save_stack+0x22/0x50 [ 36.072111] __kasan_record_aux_stack+0x8e/0xa0 [ 36.072679] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.073327] remove_vma+0x139/0x170 [ 36.073776] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.074354] do_vmi_munmap+0x1f1/0x2b0 [ 36.074841] __vm_munmap+0x138/0x3a0 [ 36.075309] __x64_sys_munmap+0x59/0x80 [ 36.075801] do_syscall_64+0x3f/0x90 [ 36.076275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.076916] [ 36.077131] The buggy address belongs to the object at ffff88800eb1a1d0 [ 36.077131] which belongs to the cache vm_area_struct of size 168 [ 36.078615] The buggy address is located 88 bytes inside of [ 36.078615] freed 168-byte region [ffff88800eb1a1d0, ffff88800eb1a278) [ 36.080030] [ 36.080245] The buggy address belongs to the physical page: [ 36.080904] page:000000001d366468 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb1a [ 36.082001] memcg:ffff88800dc0ec01 [ 36.082440] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.083094] page_type: 0xffffffff() [ 36.083542] raw: 0100000000000200 ffff88800879fc80 ffffea00003c33c0 dead000000000004 [ 36.084461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc0ec01 [ 36.085364] page dumped because: kasan: bad access detected [ 36.086022] [ 36.086242] Memory state around the buggy address: [ 36.086840] ffff88800eb1a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.087694] ffff88800eb1a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.088543] >ffff88800eb1a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.089397] ^ [ 36.089955] ffff88800eb1a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.090827] ffff88800eb1a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.091684] ================================================================== [ 36.092609] Disabling lock debugging due to kernel taint [ 38.121168] BUG: Bad rss-counter state mm:000000003afed95c type:MM_FILEPAGES val:33 [ 38.122425] BUG: Bad rss-counter state mm:000000003afed95c type:MM_ANONPAGES val:22 [ 38.555175] BUG: Bad rss-counter state mm:000000001f81212d type:MM_FILEPAGES val:33 [ 38.556945] BUG: Bad rss-counter state mm:000000001f81212d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48487' (ECDSA) to the list of known hosts. 2023/06/19 10:57:27 fuzzer started 2023/06/19 10:57:27 dialing manager at localhost:44161 2023/06/19 10:57:27 checking machine... 2023/06/19 10:57:27 checking revisions... [ 39.276572] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:57:28 testing simple program... [ 39.318538] cgroup: Unknown subsys name 'net' [ 39.369088] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:57:22 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00000000758436b7 RCX=ffffffff8217807a RDX=ffff888015a00000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880142c7ca0 RSP=ffff8880142c7b70 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=0000000000000003 R13=000000005431f5b2 R14=000000005431f5b2 R15=000000005431f5b2 RIP=ffffffff814c07eb 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 00007f0de37cf900 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=00007f0de3d86618 CR3=000000000e8e4000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fff8df78b98 CR3=000000000dac2000 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=2037323a37353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a37353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000