syzkaller login: [ 30.885076] BUG: Bad rss-counter state mm:0000000034c8d547 type:MM_FILEPAGES val:33 [ 30.886117] BUG: Bad rss-counter state mm:0000000034c8d547 type:MM_ANONPAGES val:22 [ 31.061542] ================================================================== [ 31.062446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.063461] Read of size 8 at addr ffff8880168f1d08 by task sshd/220 [ 31.064427] [ 31.064678] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.065657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.066757] Call Trace: [ 31.067128] [ 31.067458] dump_stack_lvl+0x91/0xf0 [ 31.068002] print_report+0xcc/0x620 [ 31.068577] ? __virt_addr_valid+0x102/0x340 [ 31.069259] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.069963] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.070672] kasan_report+0xbe/0xf0 [ 31.071258] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.071991] vma_interval_tree_remove+0xc75/0xec0 [ 31.072725] vma_prepare+0xc54/0x11a0 [ 31.073329] __split_vma+0x5af/0x950 [ 31.073897] ? __pfx___split_vma+0x10/0x10 [ 31.074546] ? find_held_lock+0x2c/0x110 [ 31.075175] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.075845] ? lock_is_held_type+0x9f/0x120 [ 31.076520] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.077269] ? mtree_range_walk+0x632/0x900 [ 31.077937] ? mas_walk+0x5c7/0x7c0 [ 31.078516] do_vmi_munmap+0x1f1/0x2b0 [ 31.079104] mmap_region+0x1f9/0x2660 [ 31.079696] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.080521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.081697] ? __pfx_lock_acquire+0x10/0x10 [ 31.082560] ? __pfx_mmap_region+0x10/0x10 [ 31.083412] ? security_mmap_addr+0x7d/0xa0 [ 31.084263] ? get_unmapped_area+0x1f5/0x3f0 [ 31.085163] do_mmap+0x854/0xf00 [ 31.085862] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.086495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.087184] ksys_mmap_pgoff+0x3af/0x500 [ 31.087863] do_syscall_64+0x3f/0x90 [ 31.088470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089322] RIP: 0033:0x7f516979ed82 [ 31.089996] 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 [ 31.092575] RSP: 002b:00007ffd4c4cb638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.093668] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f516979ed82 [ 31.094690] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5168bd8000 [ 31.095707] RBP: 00007f5168bd8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.096723] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e082b62f70 [ 31.097795] R13: 00007ffd4c4cb650 R14: 00007ffd4c4cb680 R15: 00007ffd4c4cb9e0 [ 31.098829] [ 31.099183] [ 31.099437] Allocated by task 213: [ 31.099948] kasan_save_stack+0x22/0x50 [ 31.100564] kasan_set_track+0x25/0x30 [ 31.101191] __kasan_slab_alloc+0x59/0x70 [ 31.101814] kmem_cache_alloc+0x16b/0x370 [ 31.102448] vm_area_dup+0x20/0x160 [ 31.102985] __split_vma+0x170/0x950 [ 31.103570] split_vma+0xc6/0x110 [ 31.104102] mprotect_fixup+0x8d2/0xb30 [ 31.104698] do_mprotect_pkey+0x87e/0xd40 [ 31.105358] __x64_sys_mprotect+0x78/0xc0 [ 31.105973] do_syscall_64+0x3f/0x90 [ 31.106560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.107368] [ 31.107627] Freed by task 213: [ 31.108093] kasan_save_stack+0x22/0x50 [ 31.108721] kasan_set_track+0x25/0x30 [ 31.109342] kasan_save_free_info+0x2b/0x50 [ 31.109968] __kasan_slab_free+0x10a/0x190 [ 31.110608] kmem_cache_free+0x10d/0x4d0 [ 31.111223] rcu_core+0x8c8/0x2860 [ 31.111745] __do_softirq+0x1b7/0x7d4 [ 31.112331] [ 31.112583] Last potentially related work creation: [ 31.113297] kasan_save_stack+0x22/0x50 [ 31.113885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.114579] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.115354] remove_vma+0x139/0x170 [ 31.115888] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.116555] do_vmi_munmap+0x1f1/0x2b0 [ 31.117159] __vm_munmap+0x138/0x3a0 [ 31.117712] __x64_sys_munmap+0x59/0x80 [ 31.118301] do_syscall_64+0x3f/0x90 [ 31.118860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119613] [ 31.119866] The buggy address belongs to the object at ffff8880168f1cb0 [ 31.119866] which belongs to the cache vm_area_struct of size 168 [ 31.121629] The buggy address is located 88 bytes inside of [ 31.121629] freed 168-byte region [ffff8880168f1cb0, ffff8880168f1d58) [ 31.123343] [ 31.123603] The buggy address belongs to the physical page: [ 31.124401] page:000000003342f4be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168f1 [ 31.125776] memcg:ffff8880168f2001 [ 31.126472] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.127612] page_type: 0xffffffff() [ 31.128350] raw: 0100000000000200 ffff88800879fc80 ffffea0000374b40 dead000000000003 [ 31.129879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168f2001 [ 31.131363] page dumped because: kasan: bad access detected [ 31.132310] [ 31.132568] Memory state around the buggy address: [ 31.133318] ffff8880168f1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.134372] ffff8880168f1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.135421] >ffff8880168f1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.136461] ^ [ 31.137004] ffff8880168f1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.138052] ffff8880168f1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.139095] ================================================================== [ 31.140407] Disabling lock debugging due to kernel taint [ 33.118179] BUG: Bad rss-counter state mm:000000009b30f4d3 type:MM_FILEPAGES val:33 [ 33.119388] BUG: Bad rss-counter state mm:000000009b30f4d3 type:MM_ANONPAGES val:22 [ 33.676689] BUG: Bad rss-counter state mm:0000000037c2c1e2 type:MM_FILEPAGES val:33 [ 33.677928] BUG: Bad rss-counter state mm:0000000037c2c1e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55056' (ECDSA) to the list of known hosts. 2023/06/20 05:28:56 fuzzer started 2023/06/20 05:28:56 dialing manager at localhost:44161 2023/06/20 05:28:56 checking machine... 2023/06/20 05:28:56 checking revisions... [ 34.338478] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:28:56 testing simple program... [ 34.383874] cgroup: Unknown subsys name 'net' [ 34.428071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:28:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017d8fdc0 RCX=0000000000000001 RDX=1ffff11002fb1f31 RSI=ffff888017d8fd98 RDI=ffff888017d8f988 RBP=ffff888017d88000 RSP=ffff888017d8f908 R8 =0000000000000001 R9 =ffff888017d8f9b8 R10=0000000000038001 R11=00000000000244bc R12=ffff888017d8f9d8 R13=ffff888017d8f9c0 R14=ffff888017d8fd98 R15=ffff888017d8f978 RIP=ffffffff81131ca6 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 00007fc663cc2900 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=00007fc664279618 CR3=0000000016964000 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=ffff888008c58400 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=00007fe5e274c000 CR3=000000000fdba000 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=2036353a38323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000