syzkaller login: [ 31.694719] BUG: Bad rss-counter state mm:000000000772d1af type:MM_FILEPAGES val:33 [ 31.696603] BUG: Bad rss-counter state mm:000000000772d1af type:MM_ANONPAGES val:22 [ 31.854746] ================================================================== [ 31.855673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.856620] Read of size 8 at addr ffff88800f08d5c8 by task sshd/219 [ 31.857409] [ 31.857720] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.858600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.859579] Call Trace: [ 31.859921] [ 31.860206] dump_stack_lvl+0x91/0xf0 [ 31.860710] print_report+0xcc/0x620 [ 31.861203] ? __virt_addr_valid+0x102/0x340 [ 31.861761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.862390] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.863011] kasan_report+0xbe/0xf0 [ 31.863482] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.864111] vma_interval_tree_remove+0xc75/0xec0 [ 31.864719] vma_prepare+0xc54/0x11a0 [ 31.865211] __split_vma+0x5af/0x950 [ 31.865684] ? __pfx___split_vma+0x10/0x10 [ 31.866241] ? find_held_lock+0x2c/0x110 [ 31.866772] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.867339] ? lock_is_held_type+0x9f/0x120 [ 31.867880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.868488] ? mtree_range_walk+0x632/0x900 [ 31.869037] ? mas_walk+0x5c7/0x7c0 [ 31.869517] do_vmi_munmap+0x1f1/0x2b0 [ 31.870033] mmap_region+0x1f9/0x2660 [ 31.870518] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.871032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.871750] ? __pfx_lock_acquire+0x10/0x10 [ 31.872289] ? __pfx_mmap_region+0x10/0x10 [ 31.872824] ? security_mmap_addr+0x7d/0xa0 [ 31.873354] ? get_unmapped_area+0x1f5/0x3f0 [ 31.873905] do_mmap+0x854/0xf00 [ 31.874364] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.874862] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.875420] ksys_mmap_pgoff+0x3af/0x500 [ 31.875925] do_syscall_64+0x3f/0x90 [ 31.876408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.877064] RIP: 0033:0x7f82749a8d82 [ 31.877517] 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 [ 31.879666] RSP: 002b:00007ffd652c5518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.880572] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82749a8d82 [ 31.881435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8273de2000 [ 31.882324] RBP: 00007f8273de2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.883187] R10: 0000000000000812 R11: 0000000000000206 R12: 000056242d95aec0 [ 31.884048] R13: 00007ffd652c5530 R14: 00007ffd652c5560 R15: 00007ffd652c58c0 [ 31.884919] [ 31.885219] [ 31.885437] Allocated by task 212: [ 31.885870] kasan_save_stack+0x22/0x50 [ 31.886385] kasan_set_track+0x25/0x30 [ 31.886888] __kasan_slab_alloc+0x59/0x70 [ 31.887421] kmem_cache_alloc+0x16b/0x370 [ 31.887939] vm_area_dup+0x20/0x160 [ 31.888407] __split_vma+0x170/0x950 [ 31.888876] split_vma+0xc6/0x110 [ 31.889323] mprotect_fixup+0x8d2/0xb30 [ 31.889825] do_mprotect_pkey+0x87e/0xd40 [ 31.890354] __x64_sys_mprotect+0x78/0xc0 [ 31.890883] do_syscall_64+0x3f/0x90 [ 31.891360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.892000] [ 31.892215] Freed by task 212: [ 31.892608] kasan_save_stack+0x22/0x50 [ 31.893114] kasan_set_track+0x25/0x30 [ 31.893613] kasan_save_free_info+0x2b/0x50 [ 31.894169] __kasan_slab_free+0x10a/0x190 [ 31.894707] kmem_cache_free+0x10d/0x4d0 [ 31.895226] rcu_core+0x8c8/0x2860 [ 31.895674] __do_softirq+0x1b7/0x7d4 [ 31.896151] [ 31.896369] Last potentially related work creation: [ 31.896960] kasan_save_stack+0x22/0x50 [ 31.897463] __kasan_record_aux_stack+0x8e/0xa0 [ 31.898048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.898695] remove_vma+0x139/0x170 [ 31.899150] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.899715] do_vmi_munmap+0x1f1/0x2b0 [ 31.900210] __vm_munmap+0x138/0x3a0 [ 31.900681] __x64_sys_munmap+0x59/0x80 [ 31.901188] do_syscall_64+0x3f/0x90 [ 31.901665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902325] [ 31.902539] The buggy address belongs to the object at ffff88800f08d570 [ 31.902539] which belongs to the cache vm_area_struct of size 168 [ 31.904032] The buggy address is located 88 bytes inside of [ 31.904032] freed 168-byte region [ffff88800f08d570, ffff88800f08d618) [ 31.905457] [ 31.905674] The buggy address belongs to the physical page: [ 31.906343] page:0000000018cb809b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf08d [ 31.907437] memcg:ffff8880197ac001 [ 31.907870] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.908518] page_type: 0xffffffff() [ 31.908973] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.909900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197ac001 [ 31.910832] page dumped because: kasan: bad access detected [ 31.911488] [ 31.911706] Memory state around the buggy address: [ 31.912278] ffff88800f08d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.913187] ffff88800f08d500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.914060] >ffff88800f08d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.914917] ^ [ 31.915585] ffff88800f08d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.916438] ffff88800f08d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.917306] ================================================================== [ 31.918604] Disabling lock debugging due to kernel taint [ 33.579023] BUG: Bad rss-counter state mm:00000000c475769a type:MM_FILEPAGES val:33 [ 33.580169] BUG: Bad rss-counter state mm:00000000c475769a type:MM_ANONPAGES val:22 [ 33.954400] BUG: Bad rss-counter state mm:00000000c36efcf7 type:MM_FILEPAGES val:33 [ 33.955406] BUG: Bad rss-counter state mm:00000000c36efcf7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47158' (ECDSA) to the list of known hosts. 2023/06/19 19:49:29 fuzzer started 2023/06/19 19:49:30 dialing manager at localhost:44161 2023/06/19 19:49:30 checking machine... 2023/06/19 19:49:30 checking revisions... [ 34.754759] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:49:30 testing simple program... [ 34.805081] cgroup: Unknown subsys name 'net' [ 34.853100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:49:28 Registers: info registers vcpu 0 RAX=ffff888008441c80 RBX=ffff88800dad7768 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000cc0 RDI=00000000000001bf RBP=ffff88800dad7758 RSP=ffff88800dad76d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000400000 R11=00000000000b6996 R12=0000000000400cc0 R13=00000000ffffffff R14=0000000000482cc0 R15=00000000000001c0 RIP=ffffffff816cb3e7 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 00007f5c8cd9f900 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=00007f5c8c1e1cf0 CR3=000000000d66a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3a97df01a308207c00000000000ae988 XMM05=22b72a81927302670000000000134508 XMM06=806171799158d96700000000001335a8 XMM07=fb795ef6d65770560000000000123bc0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=0000000000000000 RDX=ffff88801824b680 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800ef8f4d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f942ec03163 R13=0000000000000000 R14=ffff88801824b680 R15=00000000000000a4 RIP=ffffffff814c842f 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 00007f942e710900 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=00007f942ecc7618 CR3=000000000ecb0000 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=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