syzkaller login: [ 31.407072] BUG: Bad rss-counter state mm:00000000f832c762 type:MM_FILEPAGES val:33 [ 31.408180] BUG: Bad rss-counter state mm:00000000f832c762 type:MM_ANONPAGES val:22 [ 31.570448] ================================================================== [ 31.571517] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.572503] Read of size 8 at addr ffff888019e4d880 by task sshd/220 [ 31.573452] [ 31.573672] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.574551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.575545] Call Trace: [ 31.575869] [ 31.576157] dump_stack_lvl+0x91/0xf0 [ 31.576655] print_report+0xcc/0x620 [ 31.577143] ? __virt_addr_valid+0x102/0x340 [ 31.577700] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.578319] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.578938] kasan_report+0xbe/0xf0 [ 31.579415] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.580041] vma_interval_tree_remove+0xc75/0xec0 [ 31.580674] vma_prepare+0xc54/0x11a0 [ 31.581151] __split_vma+0x5af/0x950 [ 31.581618] ? __pfx___split_vma+0x10/0x10 [ 31.582155] ? find_held_lock+0x2c/0x110 [ 31.582684] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.583259] ? lock_is_held_type+0x9f/0x120 [ 31.583797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.584406] ? mtree_range_walk+0x632/0x900 [ 31.584973] ? mas_walk+0x5c7/0x7c0 [ 31.585447] do_vmi_munmap+0x1f1/0x2b0 [ 31.585951] mmap_region+0x1f9/0x2660 [ 31.586439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.586959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.587667] ? __pfx_lock_acquire+0x10/0x10 [ 31.588204] ? __pfx_mmap_region+0x10/0x10 [ 31.588758] ? security_mmap_addr+0x7d/0xa0 [ 31.589299] ? get_unmapped_area+0x1f5/0x3f0 [ 31.589854] do_mmap+0x854/0xf00 [ 31.590300] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.590800] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.591361] ksys_mmap_pgoff+0x3af/0x500 [ 31.591866] do_syscall_64+0x3f/0x90 [ 31.592345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.592993] RIP: 0033:0x7f63d31bdd82 [ 31.593456] 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 [ 31.595691] RSP: 002b:00007ffd45e26838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.596697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63d31bdd82 [ 31.597600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63d25f7000 [ 31.598451] RBP: 00007f63d25f7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.599303] R10: 0000000000000812 R11: 0000000000000206 R12: 000055929da10f70 [ 31.600165] R13: 00007ffd45e26850 R14: 00007ffd45e26880 R15: 00007ffd45e26be0 [ 31.601045] [ 31.601338] [ 31.601553] Allocated by task 213: [ 31.601983] kasan_save_stack+0x22/0x50 [ 31.602493] kasan_set_track+0x25/0x30 [ 31.602998] __kasan_slab_alloc+0x59/0x70 [ 31.603521] kmem_cache_alloc+0x16b/0x370 [ 31.604044] vm_area_dup+0x20/0x160 [ 31.604502] __split_vma+0x170/0x950 [ 31.605034] split_vma+0xc6/0x110 [ 31.605516] mprotect_fixup+0x8d2/0xb30 [ 31.606018] do_mprotect_pkey+0x87e/0xd40 [ 31.606557] __x64_sys_mprotect+0x78/0xc0 [ 31.607082] do_syscall_64+0x3f/0x90 [ 31.607567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.608219] [ 31.608433] Freed by task 213: [ 31.608861] kasan_save_stack+0x22/0x50 [ 31.609369] kasan_set_track+0x25/0x30 [ 31.609870] kasan_save_free_info+0x2b/0x50 [ 31.610485] __kasan_slab_free+0x10a/0x190 [ 31.611157] kmem_cache_free+0x10d/0x4d0 [ 31.611786] rcu_core+0x8c8/0x2860 [ 31.612336] __do_softirq+0x1b7/0x7d4 [ 31.612911] [ 31.613172] Last potentially related work creation: [ 31.613810] kasan_save_stack+0x22/0x50 [ 31.614400] __kasan_record_aux_stack+0x8e/0xa0 [ 31.614971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.615612] remove_vma+0x139/0x170 [ 31.616062] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.616639] do_vmi_munmap+0x1f1/0x2b0 [ 31.617131] __vm_munmap+0x138/0x3a0 [ 31.617597] __x64_sys_munmap+0x59/0x80 [ 31.618094] do_syscall_64+0x3f/0x90 [ 31.618565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.619205] [ 31.619418] The buggy address belongs to the object at ffff888019e4d828 [ 31.619418] which belongs to the cache vm_area_struct of size 168 [ 31.620887] The buggy address is located 88 bytes inside of [ 31.620887] freed 168-byte region [ffff888019e4d828, ffff888019e4d8d0) [ 31.622291] [ 31.622508] The buggy address belongs to the physical page: [ 31.623164] page:0000000097636d59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e4d [ 31.624253] memcg:ffff88800edbdd01 [ 31.624683] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.625329] page_type: 0xffffffff() [ 31.625779] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.626698] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edbdd01 [ 31.627610] page dumped because: kasan: bad access detected [ 31.628271] [ 31.628486] Memory state around the buggy address: [ 31.629089] ffff888019e4d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.629944] ffff888019e4d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.630793] >ffff888019e4d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.631654] ^ [ 31.632073] ffff888019e4d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.632938] ffff888019e4d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.633791] ================================================================== [ 31.634753] Disabling lock debugging due to kernel taint [ 34.282556] BUG: Bad rss-counter state mm:0000000077d8a278 type:MM_FILEPAGES val:33 [ 34.283324] BUG: Bad rss-counter state mm:0000000077d8a278 type:MM_ANONPAGES val:22 [ 34.732004] BUG: Bad rss-counter state mm:000000002c69df5f type:MM_FILEPAGES val:33 [ 34.732947] BUG: Bad rss-counter state mm:000000002c69df5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49364' (ECDSA) to the list of known hosts. 2023/06/19 11:42:16 fuzzer started 2023/06/19 11:42:16 dialing manager at localhost:44161 2023/06/19 11:42:16 checking machine... 2023/06/19 11:42:16 checking revisions... [ 35.503102] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:42:16 testing simple program... [ 35.547206] cgroup: Unknown subsys name 'net' [ 35.590522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:42:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019b51cc0 RCX=ffffffff8363925d RDX=ffff888015e3d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800d037d80 RSP=ffff88800d037cd8 R8 =0000000000000005 R9 =00000000fffffdef R10=00000000000000f4 R11=00000000000b6996 R12=00000000000000f4 R13=00000000000000f4 R14=ffff888019b51cc0 R15=0000000000000000 RIP=ffffffff814c01fc 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 00007f0dc32e8900 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=00007ffd7c31e000 CR3=000000000e978000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f8acc0a8d30 CR3=000000000d37e000 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=a16d7219b6bcf3adae4b20ac1657be38 XMM02=2c67c8bc2e329bc3000000000011da00 XMM03=fb795ef6d657705600000000001247a8 XMM04=c6d051821b870e7900000000000ae988 XMM05=19e9129bd510f2350000000000134288 XMM06=106bf8f14aa4c51100000000001330f0 XMM07=e042d86d42eb936e0000000000124a28 XMM08=cb8d2a6d8ac4b2e1000000000011da60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000