syzkaller login: [ 31.140411] BUG: Bad rss-counter state mm:000000001213eee5 type:MM_FILEPAGES val:33 [ 31.142033] BUG: Bad rss-counter state mm:000000001213eee5 type:MM_ANONPAGES val:22 [ 31.261856] ================================================================== [ 31.262683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.263512] Read of size 8 at addr ffff888019d44d08 by task sshd/222 [ 31.264210] [ 31.264406] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.265193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.266306] Call Trace: [ 31.266602] [ 31.266864] dump_stack_lvl+0x91/0xf0 [ 31.267300] print_report+0xcc/0x620 [ 31.267753] ? __virt_addr_valid+0x102/0x340 [ 31.268285] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268890] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269490] kasan_report+0xbe/0xf0 [ 31.269952] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270538] vma_interval_tree_remove+0xc75/0xec0 [ 31.271118] vma_prepare+0xc54/0x11a0 [ 31.271566] __split_vma+0x5af/0x950 [ 31.272013] ? __pfx___split_vma+0x10/0x10 [ 31.272519] ? find_held_lock+0x2c/0x110 [ 31.273003] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.273516] ? lock_is_held_type+0x9f/0x120 [ 31.274012] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.274591] ? mtree_range_walk+0x632/0x900 [ 31.275090] ? mas_walk+0x5c7/0x7c0 [ 31.275518] do_vmi_munmap+0x1f1/0x2b0 [ 31.275963] mmap_region+0x1f9/0x2660 [ 31.276397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.276884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.277534] ? __pfx_lock_acquire+0x10/0x10 [ 31.278018] ? __pfx_mmap_region+0x10/0x10 [ 31.278495] ? security_mmap_addr+0x7d/0xa0 [ 31.278978] ? get_unmapped_area+0x1f5/0x3f0 [ 31.279479] do_mmap+0x854/0xf00 [ 31.279879] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.280330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.280840] ksys_mmap_pgoff+0x3af/0x500 [ 31.281303] do_syscall_64+0x3f/0x90 [ 31.281742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282329] RIP: 0033:0x7f7166decd82 [ 31.282744] 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 [ 31.284712] RSP: 002b:00007fff43d8ae38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.285536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7166decd82 [ 31.286319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7166226000 [ 31.287102] RBP: 00007f7166226000 R08: 0000000000000009 R09: 0000000000001000 [ 31.287877] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636f7504f70 [ 31.288659] R13: 00007fff43d8ae50 R14: 00007fff43d8ae80 R15: 00007fff43d8b1e0 [ 31.289438] [ 31.289722] [ 31.289930] Allocated by task 215: [ 31.290320] kasan_save_stack+0x22/0x50 [ 31.290784] kasan_set_track+0x25/0x30 [ 31.291239] __kasan_slab_alloc+0x59/0x70 [ 31.291719] kmem_cache_alloc+0x16b/0x370 [ 31.292192] vm_area_dup+0x20/0x160 [ 31.292622] __split_vma+0x170/0x950 [ 31.293051] split_vma+0xc6/0x110 [ 31.293450] mprotect_fixup+0x8d2/0xb30 [ 31.293911] do_mprotect_pkey+0x87e/0xd40 [ 31.294401] __x64_sys_mprotect+0x78/0xc0 [ 31.294876] do_syscall_64+0x3f/0x90 [ 31.295306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295894] [ 31.296089] Freed by task 204: [ 31.296460] kasan_save_stack+0x22/0x50 [ 31.296921] kasan_set_track+0x25/0x30 [ 31.297381] kasan_save_free_info+0x2b/0x50 [ 31.297866] __kasan_slab_free+0x10a/0x190 [ 31.298366] kmem_cache_free+0x10d/0x4d0 [ 31.298843] rcu_core+0x8c8/0x2860 [ 31.299259] __do_softirq+0x1b7/0x7d4 [ 31.299686] [ 31.299891] Last potentially related work creation: [ 31.300449] kasan_save_stack+0x22/0x50 [ 31.300920] __kasan_record_aux_stack+0x8e/0xa0 [ 31.301445] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.302040] remove_vma+0x139/0x170 [ 31.302457] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.302965] do_vmi_munmap+0x1f1/0x2b0 [ 31.303415] __vm_munmap+0x138/0x3a0 [ 31.303840] __x64_sys_munmap+0x59/0x80 [ 31.304289] do_syscall_64+0x3f/0x90 [ 31.304724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305306] [ 31.305504] The buggy address belongs to the object at ffff888019d44cb0 [ 31.305504] which belongs to the cache vm_area_struct of size 168 [ 31.306838] The buggy address is located 88 bytes inside of [ 31.306838] freed 168-byte region [ffff888019d44cb0, ffff888019d44d58) [ 31.308204] [ 31.308405] The buggy address belongs to the physical page: [ 31.309025] page:000000006c63dc14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d44 [ 31.310038] memcg:ffff88800e919f01 [ 31.310427] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.311033] page_type: 0xffffffff() [ 31.311451] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.312301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e919f01 [ 31.313142] page dumped because: kasan: bad access detected [ 31.313750] [ 31.313949] Memory state around the buggy address: [ 31.314488] ffff888019d44c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.315273] ffff888019d44c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.316069] >ffff888019d44d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.316870] ^ [ 31.317279] ffff888019d44d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.318062] ffff888019d44e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.318856] ================================================================== [ 31.319716] Disabling lock debugging due to kernel taint [ 33.548118] BUG: Bad rss-counter state mm:0000000071df0b15 type:MM_FILEPAGES val:33 [ 33.549438] BUG: Bad rss-counter state mm:0000000071df0b15 type:MM_ANONPAGES val:22 [ 33.929788] BUG: Bad rss-counter state mm:000000000f1c9ca5 type:MM_FILEPAGES val:33 [ 33.930872] BUG: Bad rss-counter state mm:000000000f1c9ca5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24241' (ECDSA) to the list of known hosts. 2023/06/19 22:57:41 fuzzer started 2023/06/19 22:57:41 dialing manager at localhost:44161 2023/06/19 22:57:41 checking machine... 2023/06/19 22:57:41 checking revisions... [ 34.627217] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:57:41 testing simple program... [ 34.667593] cgroup: Unknown subsys name 'net' [ 34.707175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:57:40 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=000000000000000a RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81452cd2 RDI=ffff88800daa9054 RBP=ffff88800daa9000 RSP=ffff888014127c10 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000004e R11=00000000000b6996 R12=ffff888015a05000 R13=ffff88800a26c000 R14=ffffffff87f9478c R15=0000000000000000 RIP=ffffffff81452d21 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 00007f403b1df900 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=00007ffd7f25def8 CR3=000000000f70a000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007fa0193e17e0 CR3=0000000009b30000 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=9f893dd0a3dc1aadc645412ac49dbd46 XMM02=000000000011c9c8eff9b2d0a8fce9cb XMM03=000000000011ca982c67c8bc2e329bc3 XMM04=8ad0f7347b49ae8800000000000ae988 XMM05=015f68e58913ad590000000000134b20 XMM06=00c3ffa147b8d8570000000000133910 XMM07=fb795ef6d65770560000000000123ea0 XMM08=2c67c8bc2e329bc3000000000011ca38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000