syzkaller login: [ 31.391316] BUG: Bad rss-counter state mm:0000000057676b02 type:MM_FILEPAGES val:33 [ 31.392447] BUG: Bad rss-counter state mm:0000000057676b02 type:MM_ANONPAGES val:22 [ 31.534957] ================================================================== [ 31.535846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.536794] Read of size 8 at addr ffff88800e4b04e0 by task sshd/220 [ 31.537641] [ 31.537881] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.538726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.539689] Call Trace: [ 31.540043] [ 31.540324] dump_stack_lvl+0x91/0xf0 [ 31.540823] print_report+0xcc/0x620 [ 31.541318] ? __virt_addr_valid+0x102/0x340 [ 31.541873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.542487] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.543103] kasan_report+0xbe/0xf0 [ 31.543579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.544200] vma_interval_tree_remove+0xc75/0xec0 [ 31.544833] vma_prepare+0xc54/0x11a0 [ 31.545316] __split_vma+0x5af/0x950 [ 31.545788] ? __pfx___split_vma+0x10/0x10 [ 31.546340] ? find_held_lock+0x2c/0x110 [ 31.546864] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.547431] ? lock_is_held_type+0x9f/0x120 [ 31.547998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.548611] ? mtree_range_walk+0x632/0x900 [ 31.549170] ? mas_walk+0x5c7/0x7c0 [ 31.549654] do_vmi_munmap+0x1f1/0x2b0 [ 31.550160] mmap_region+0x1f9/0x2660 [ 31.550655] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.551174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.551894] ? __pfx_lock_acquire+0x10/0x10 [ 31.552450] ? __pfx_mmap_region+0x10/0x10 [ 31.552997] ? security_mmap_addr+0x7d/0xa0 [ 31.553553] ? get_unmapped_area+0x1f5/0x3f0 [ 31.554124] do_mmap+0x854/0xf00 [ 31.554567] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.555078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.555677] ksys_mmap_pgoff+0x3af/0x500 [ 31.556271] do_syscall_64+0x3f/0x90 [ 31.556776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.557437] RIP: 0033:0x7fc108eacd82 [ 31.557917] 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 [ 31.560151] RSP: 002b:00007ffc3149cd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.561080] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc108eacd82 [ 31.561968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1082e6000 [ 31.562843] RBP: 00007fc1082e6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.563731] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563bf91e1b20 [ 31.564607] R13: 00007ffc3149cd20 R14: 00007ffc3149cd50 R15: 00007ffc3149d0b0 [ 31.565500] [ 31.565800] [ 31.566025] Allocated by task 213: [ 31.566473] kasan_save_stack+0x22/0x50 [ 31.566999] kasan_set_track+0x25/0x30 [ 31.567517] __kasan_slab_alloc+0x59/0x70 [ 31.568075] kmem_cache_alloc+0x16b/0x370 [ 31.568604] vm_area_dup+0x20/0x160 [ 31.569076] __split_vma+0x170/0x950 [ 31.569557] split_vma+0xc6/0x110 [ 31.570017] mprotect_fixup+0x8d2/0xb30 [ 31.570535] do_mprotect_pkey+0x87e/0xd40 [ 31.571067] __x64_sys_mprotect+0x78/0xc0 [ 31.571610] do_syscall_64+0x3f/0x90 [ 31.572108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.572780] [ 31.573001] Freed by task 213: [ 31.573401] kasan_save_stack+0x22/0x50 [ 31.573923] kasan_set_track+0x25/0x30 [ 31.574434] kasan_save_free_info+0x2b/0x50 [ 31.574982] __kasan_slab_free+0x10a/0x190 [ 31.575536] kmem_cache_free+0x10d/0x4d0 [ 31.576079] rcu_core+0x8c8/0x2860 [ 31.576541] __do_softirq+0x1b7/0x7d4 [ 31.577031] [ 31.577251] Last potentially related work creation: [ 31.577869] kasan_save_stack+0x22/0x50 [ 31.578457] __kasan_record_aux_stack+0x8e/0xa0 [ 31.579043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.579706] remove_vma+0x139/0x170 [ 31.580186] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.580766] do_vmi_munmap+0x1f1/0x2b0 [ 31.581288] __vm_munmap+0x138/0x3a0 [ 31.581770] __x64_sys_munmap+0x59/0x80 [ 31.582281] do_syscall_64+0x3f/0x90 [ 31.582765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.583435] [ 31.583647] The buggy address belongs to the object at ffff88800e4b0488 [ 31.583647] which belongs to the cache vm_area_struct of size 168 [ 31.585193] The buggy address is located 88 bytes inside of [ 31.585193] freed 168-byte region [ffff88800e4b0488, ffff88800e4b0530) [ 31.586680] [ 31.586897] The buggy address belongs to the physical page: [ 31.587577] page:00000000d51890ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4b0 [ 31.588709] memcg:ffff88800c5cb701 [ 31.589150] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.589816] page_type: 0xffffffff() [ 31.590286] raw: 0100000000000200 ffff8880087a0c80 ffffea0000379d40 dead000000000004 [ 31.591242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5cb701 [ 31.592243] page dumped because: kasan: bad access detected [ 31.592924] [ 31.593148] Memory state around the buggy address: [ 31.593754] ffff88800e4b0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.594645] ffff88800e4b0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.595538] >ffff88800e4b0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.596433] ^ [ 31.597213] ffff88800e4b0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.598089] ffff88800e4b0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.598982] ================================================================== [ 31.599918] Disabling lock debugging due to kernel taint [ 33.477548] BUG: Bad rss-counter state mm:000000008313c2f8 type:MM_FILEPAGES val:33 [ 33.478477] BUG: Bad rss-counter state mm:000000008313c2f8 type:MM_ANONPAGES val:22 [ 33.955098] BUG: Bad rss-counter state mm:000000004f9bf4b9 type:MM_FILEPAGES val:33 [ 33.956329] BUG: Bad rss-counter state mm:000000004f9bf4b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46367' (ECDSA) to the list of known hosts. 2023/06/20 21:40:47 fuzzer started 2023/06/20 21:40:48 dialing manager at localhost:36067 2023/06/20 21:40:48 checking machine... 2023/06/20 21:40:48 checking revisions... [ 34.689774] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:40:48 testing simple program... [ 34.746755] cgroup: Unknown subsys name 'net' [ 34.782960] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:40:47 Registers: info registers vcpu 0 RAX=0000000064921cdf RBX=001aeb45135b4c80 RCX=0000000000000018 RDX=ffff888015d68000 RSI=ffffffff813c8a3c RDI=0000000000000005 RBP=000000000000d300 RSP=ffff888016a97a58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888016a97ac8 R13=ffffed1002d52f5a R14=ffffed1002d52f59 R15=ffff888016a97ad0 RIP=ffffffff813c8a50 RFL=00000293 [--S-A-C] 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 00007f265dbbb700 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=00007f592e9a8000 CR3=0000000018f8e000 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=2037343a30343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a30343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffefa7bb000 CR3=000000000f546000 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=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