syzkaller login: [ 30.522874] BUG: Bad rss-counter state mm:00000000a72f29e8 type:MM_FILEPAGES val:33 [ 30.524086] BUG: Bad rss-counter state mm:00000000a72f29e8 type:MM_ANONPAGES val:22 [ 30.564192] ================================================================== [ 30.565228] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.566372] Read of size 8 at addr ffff888019b98058 by task sshd/220 [ 30.567318] [ 30.567552] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.568492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.569528] Call Trace: [ 30.569875] [ 30.570184] dump_stack_lvl+0x91/0xf0 [ 30.570722] print_report+0xcc/0x620 [ 30.571255] ? __virt_addr_valid+0x102/0x340 [ 30.571854] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.572557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.573233] kasan_report+0xbe/0xf0 [ 30.573753] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.574432] vma_interval_tree_remove+0xc75/0xec0 [ 30.575086] vma_prepare+0xc54/0x11a0 [ 30.575617] __split_vma+0x5af/0x950 [ 30.576131] ? __pfx___split_vma+0x10/0x10 [ 30.576719] ? find_held_lock+0x2c/0x110 [ 30.577293] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.577908] ? lock_is_held_type+0x9f/0x120 [ 30.578505] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.579157] ? mtree_range_walk+0x632/0x900 [ 30.579747] ? mas_walk+0x5c7/0x7c0 [ 30.580280] do_vmi_munmap+0x1f1/0x2b0 [ 30.580816] mmap_region+0x1f9/0x2660 [ 30.581329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.581885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.582647] ? __pfx_lock_acquire+0x10/0x10 [ 30.583211] ? __pfx_mmap_region+0x10/0x10 [ 30.583773] ? security_mmap_addr+0x7d/0xa0 [ 30.584360] ? get_unmapped_area+0x1f5/0x3f0 [ 30.584939] do_mmap+0x854/0xf00 [ 30.585407] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.585928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.586536] ksys_mmap_pgoff+0x3af/0x500 [ 30.587069] do_syscall_64+0x3f/0x90 [ 30.587578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.588291] RIP: 0033:0x7f296e30bd82 [ 30.588792] 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 [ 30.591101] RSP: 002b:00007ffd96d38e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.592085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f296e30bd82 [ 30.593018] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f296d745000 [ 30.593950] RBP: 00007f296d745000 R08: 0000000000000009 R09: 0000000000001000 [ 30.594872] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605ed41bd90 [ 30.595802] R13: 00007ffd96d38e70 R14: 00007ffd96d38ea0 R15: 00007ffd96d39200 [ 30.596732] [ 30.597050] [ 30.597281] Allocated by task 213: [ 30.597748] kasan_save_stack+0x22/0x50 [ 30.598294] kasan_set_track+0x25/0x30 [ 30.598826] __kasan_slab_alloc+0x59/0x70 [ 30.599392] kmem_cache_alloc+0x16b/0x370 [ 30.599952] vm_area_dup+0x20/0x160 [ 30.600464] __split_vma+0x170/0x950 [ 30.600959] split_vma+0xc6/0x110 [ 30.601438] mprotect_fixup+0x8d2/0xb30 [ 30.601981] do_mprotect_pkey+0x87e/0xd40 [ 30.602547] __x64_sys_mprotect+0x78/0xc0 [ 30.603111] do_syscall_64+0x3f/0x90 [ 30.603633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.604327] [ 30.604559] Freed by task 213: [ 30.605065] kasan_save_stack+0x22/0x50 [ 30.605615] kasan_set_track+0x25/0x30 [ 30.606150] kasan_save_free_info+0x2b/0x50 [ 30.606720] __kasan_slab_free+0x10a/0x190 [ 30.607303] kmem_cache_free+0x10d/0x4d0 [ 30.607853] rcu_core+0x8c8/0x2860 [ 30.608352] __do_softirq+0x1b7/0x7d4 [ 30.608871] [ 30.609101] Last potentially related work creation: [ 30.609734] kasan_save_stack+0x22/0x50 [ 30.610274] __kasan_record_aux_stack+0x8e/0xa0 [ 30.610898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.611591] remove_vma+0x139/0x170 [ 30.612086] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.612706] do_vmi_munmap+0x1f1/0x2b0 [ 30.613235] __vm_munmap+0x138/0x3a0 [ 30.613733] __x64_sys_munmap+0x59/0x80 [ 30.614266] do_syscall_64+0x3f/0x90 [ 30.614784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.615477] [ 30.615716] The buggy address belongs to the object at ffff888019b98000 [ 30.615716] which belongs to the cache vm_area_struct of size 168 [ 30.617293] The buggy address is located 88 bytes inside of [ 30.617293] freed 168-byte region [ffff888019b98000, ffff888019b980a8) [ 30.618810] [ 30.619043] The buggy address belongs to the physical page: [ 30.619757] page:00000000fb91f078 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b98 [ 30.620990] memcg:ffff88800f947301 [ 30.621453] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.622149] page_type: 0xffffffff() [ 30.622630] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.623603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f947301 [ 30.624579] page dumped because: kasan: bad access detected [ 30.625290] [ 30.625517] Memory state around the buggy address: [ 30.626129] ffff888019b97f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.627034] ffff888019b97f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.627942] >ffff888019b98000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.628874] ^ [ 30.629649] ffff888019b98080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.630577] ffff888019b98100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.631487] ================================================================== [ 30.632492] Disabling lock debugging due to kernel taint [ 33.189644] BUG: Bad rss-counter state mm:0000000072f10b83 type:MM_FILEPAGES val:33 [ 33.190631] BUG: Bad rss-counter state mm:0000000072f10b83 type:MM_ANONPAGES val:22 [ 33.661294] BUG: Bad rss-counter state mm:0000000049e4e093 type:MM_FILEPAGES val:33 [ 33.662375] BUG: Bad rss-counter state mm:0000000049e4e093 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53918' (ECDSA) to the list of known hosts. 2023/06/20 21:52:56 fuzzer started 2023/06/20 21:52:56 dialing manager at localhost:36067 2023/06/20 21:52:56 checking machine... 2023/06/20 21:52:56 checking revisions... [ 34.366874] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:52:56 testing simple program... [ 34.417456] cgroup: Unknown subsys name 'net' [ 34.471609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:52:56 Registers: info registers vcpu 0 RAX=ffff88807ffdc6b8 RBX=dffffc0000000000 RCX=0000000000000003 RDX=1ffff1100fffb8d8 RSI=0000000000000008 RDI=ffff88807ffdc6c0 RBP=0000000000000003 RSP=ffff888019387378 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=1ffff1100fffb8bd R12=ffffea00006c9208 R13=ffff88807ffdc6b8 R14=0000000000000002 R15=ffff88807ffdc500 RIP=ffffffff8178f8bb 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 00007f0a1167d700 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=00007f21adcaa590 CR3=000000000dca8000 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=2035353a32353a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a32353a3132203032 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=00007ffc45df8000 CR3=000000000edd4000 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