syzkaller login: [ 30.624809] BUG: Bad rss-counter state mm:0000000014a1c748 type:MM_FILEPAGES val:33 [ 30.625881] BUG: Bad rss-counter state mm:0000000014a1c748 type:MM_ANONPAGES val:22 [ 30.664386] ================================================================== [ 30.665387] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.666361] Read of size 8 at addr ffff888016af1880 by task sshd/220 [ 30.667163] [ 30.667412] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.668311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.669335] Call Trace: [ 30.669655] [ 30.669951] dump_stack_lvl+0x91/0xf0 [ 30.670462] print_report+0xcc/0x620 [ 30.670969] ? __virt_addr_valid+0x102/0x340 [ 30.671557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.672214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.672838] kasan_report+0xbe/0xf0 [ 30.673332] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.673980] vma_interval_tree_remove+0xc75/0xec0 [ 30.674602] vma_prepare+0xc54/0x11a0 [ 30.675087] __split_vma+0x5af/0x950 [ 30.675574] ? __pfx___split_vma+0x10/0x10 [ 30.676107] ? find_held_lock+0x2c/0x110 [ 30.676628] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.677216] ? lock_is_held_type+0x9f/0x120 [ 30.677769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.678384] ? mtree_range_walk+0x632/0x900 [ 30.678942] ? mas_walk+0x5c7/0x7c0 [ 30.679446] do_vmi_munmap+0x1f1/0x2b0 [ 30.679948] mmap_region+0x1f9/0x2660 [ 30.680438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.680957] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.681678] ? __pfx_lock_acquire+0x10/0x10 [ 30.682214] ? __pfx_mmap_region+0x10/0x10 [ 30.682759] ? security_mmap_addr+0x7d/0xa0 [ 30.683309] ? get_unmapped_area+0x1f5/0x3f0 [ 30.683863] do_mmap+0x854/0xf00 [ 30.684304] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.684807] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.685378] ksys_mmap_pgoff+0x3af/0x500 [ 30.685890] do_syscall_64+0x3f/0x90 [ 30.686373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687025] RIP: 0033:0x7fdf614ebd82 [ 30.687491] 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 [ 30.689634] RSP: 002b:00007ffc9e4f2c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.690539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf614ebd82 [ 30.691406] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf60925000 [ 30.692334] RBP: 00007fdf60925000 R08: 0000000000000009 R09: 0000000000001000 [ 30.693175] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b0e736b20 [ 30.694014] R13: 00007ffc9e4f2c90 R14: 00007ffc9e4f2cc0 R15: 00007ffc9e4f3020 [ 30.694888] [ 30.695184] [ 30.695407] Allocated by task 213: [ 30.695833] kasan_save_stack+0x22/0x50 [ 30.696336] kasan_set_track+0x25/0x30 [ 30.696825] __kasan_slab_alloc+0x59/0x70 [ 30.697342] kmem_cache_alloc+0x16b/0x370 [ 30.697851] vm_area_dup+0x20/0x160 [ 30.698304] __split_vma+0x170/0x950 [ 30.698770] split_vma+0xc6/0x110 [ 30.699235] mprotect_fixup+0x8d2/0xb30 [ 30.699744] do_mprotect_pkey+0x87e/0xd40 [ 30.700278] __x64_sys_mprotect+0x78/0xc0 [ 30.700806] do_syscall_64+0x3f/0x90 [ 30.701283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.701925] [ 30.702145] Freed by task 213: [ 30.702538] kasan_save_stack+0x22/0x50 [ 30.703046] kasan_set_track+0x25/0x30 [ 30.703549] kasan_save_free_info+0x2b/0x50 [ 30.704087] __kasan_slab_free+0x10a/0x190 [ 30.704633] kmem_cache_free+0x10d/0x4d0 [ 30.705150] rcu_core+0x8c8/0x2860 [ 30.705604] __do_softirq+0x1b7/0x7d4 [ 30.706086] [ 30.706302] Last potentially related work creation: [ 30.706891] kasan_save_stack+0x22/0x50 [ 30.707418] __kasan_record_aux_stack+0x8e/0xa0 [ 30.708000] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.708648] remove_vma+0x139/0x170 [ 30.709100] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.709666] do_vmi_munmap+0x1f1/0x2b0 [ 30.710155] __vm_munmap+0x138/0x3a0 [ 30.710623] __x64_sys_munmap+0x59/0x80 [ 30.711122] do_syscall_64+0x3f/0x90 [ 30.711607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.712253] [ 30.712473] The buggy address belongs to the object at ffff888016af1828 [ 30.712473] which belongs to the cache vm_area_struct of size 168 [ 30.713956] The buggy address is located 88 bytes inside of [ 30.713956] freed 168-byte region [ffff888016af1828, ffff888016af18d0) [ 30.715381] [ 30.715599] The buggy address belongs to the physical page: [ 30.716270] page:00000000959e7ac5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16af1 [ 30.717370] memcg:ffff8880099d3c01 [ 30.717802] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.718458] page_type: 0xffffffff() [ 30.718911] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.719855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099d3c01 [ 30.720769] page dumped because: kasan: bad access detected [ 30.721443] [ 30.721663] Memory state around the buggy address: [ 30.722248] ffff888016af1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.723112] ffff888016af1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.723997] >ffff888016af1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.724861] ^ [ 30.725284] ffff888016af1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.726155] ffff888016af1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.727011] ================================================================== [ 30.728214] Disabling lock debugging due to kernel taint [ 32.524527] BUG: Bad rss-counter state mm:0000000026a0b8d5 type:MM_FILEPAGES val:33 [ 32.525340] BUG: Bad rss-counter state mm:0000000026a0b8d5 type:MM_ANONPAGES val:22 [ 32.997583] BUG: Bad rss-counter state mm:00000000d403e74f type:MM_FILEPAGES val:33 [ 32.998752] BUG: Bad rss-counter state mm:00000000d403e74f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24839' (ECDSA) to the list of known hosts. 2023/06/21 04:44:58 fuzzer started 2023/06/21 04:44:58 dialing manager at localhost:36067 2023/06/21 04:44:58 checking machine... 2023/06/21 04:44:58 checking revisions... [ 33.526790] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:44:58 testing simple program... [ 33.576034] cgroup: Unknown subsys name 'net' [ 33.608381] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed100d9c1368 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffff88806ce09bd0 RBP=ffffffff813782f8 RSP=ffff88806ce09b40 R8 =0000000000000130 R9 =0000000000000000 R10=ffffed1001d4ce00 R11=0000000000000000 R12=0000000000000000 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800ea67080 RIP=ffffffff813ad6d2 RFL=00000282 [--S----] 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 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=00007fe87f21e880 CR3=000000000d666000 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=47708003f61ca283d343978e64ba76a3 XMM02=000000000011d298eff9b2d0a8fce9cb XMM03=000000000011d3682c67c8bc2e329bc3 XMM04=49ab5dc86bb2d40000000000000ae988 XMM05=19e9129bd510f2350000000000131860 XMM06=68206aec0b4c272900000000001306c8 XMM07=e042d86d42eb936e0000000000121d28 XMM08=15e5e4faade8d552000000000011d368 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888014362000 RCX=ffffffff83871857 RDX=ffff888008f65000 RSI=fffffffffffff000 RDI=0000000000000007 RBP=ffff888008f65000 RSP=ffff88800cbe7b10 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff888008f65000 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888019cd4000 R14=0000000000000007 R15=ffff888019cd4000 RIP=ffffffff814c0250 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 00007f794391b900 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=00007fff0d48d000 CR3=000000001ce96000 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