syzkaller login: [ 38.343416] BUG: Bad rss-counter state mm:0000000038854ee2 type:MM_FILEPAGES val:33 [ 38.344155] BUG: Bad rss-counter state mm:0000000038854ee2 type:MM_ANONPAGES val:22 [ 38.538168] ================================================================== [ 38.538782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.539430] Read of size 8 at addr ffff88800ec50880 by task sshd/219 [ 38.539910] [ 38.540047] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.540581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.541181] Call Trace: [ 38.541381] [ 38.541560] dump_stack_lvl+0x91/0xf0 [ 38.541871] print_report+0xcc/0x620 [ 38.542177] ? __virt_addr_valid+0x102/0x340 [ 38.542530] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.543710] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.544155] kasan_report+0xbe/0xf0 [ 38.544457] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.544845] vma_interval_tree_remove+0xc75/0xec0 [ 38.545275] vma_prepare+0xc54/0x11a0 [ 38.545579] __split_vma+0x5af/0x950 [ 38.545875] ? __pfx___split_vma+0x10/0x10 [ 38.546265] ? find_held_lock+0x2c/0x110 [ 38.546597] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.547063] ? lock_is_held_type+0x9f/0x120 [ 38.547486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.547893] ? mtree_range_walk+0x632/0x900 [ 38.548269] ? mas_walk+0x5c7/0x7c0 [ 38.548591] do_vmi_munmap+0x1f1/0x2b0 [ 38.548922] mmap_region+0x1f9/0x2660 [ 38.549247] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.549596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.550082] ? __pfx_lock_acquire+0x10/0x10 [ 38.550445] ? __pfx_mmap_region+0x10/0x10 [ 38.550949] ? security_mmap_addr+0x7d/0xa0 [ 38.551307] ? get_unmapped_area+0x1f5/0x3f0 [ 38.551680] do_mmap+0x854/0xf00 [ 38.551980] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.552318] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.552692] ksys_mmap_pgoff+0x3af/0x500 [ 38.553034] do_syscall_64+0x3f/0x90 [ 38.553359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.553789] RIP: 0033:0x7f27150edd82 [ 38.554103] 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 [ 38.555523] RSP: 002b:00007ffca9f341e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.556118] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27150edd82 [ 38.556669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2714527000 [ 38.557220] RBP: 00007f2714527000 R08: 0000000000000009 R09: 0000000000001000 [ 38.557771] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9827d6ec0 [ 38.558325] R13: 00007ffca9f34200 R14: 00007ffca9f34230 R15: 00007ffca9f34590 [ 38.558921] [ 38.559118] [ 38.559263] Allocated by task 212: [ 38.559545] kasan_save_stack+0x22/0x50 [ 38.559886] kasan_set_track+0x25/0x30 [ 38.560214] __kasan_slab_alloc+0x59/0x70 [ 38.560561] kmem_cache_alloc+0x16b/0x370 [ 38.560908] vm_area_dup+0x20/0x160 [ 38.561213] __split_vma+0x170/0x950 [ 38.561525] split_vma+0xc6/0x110 [ 38.561822] mprotect_fixup+0x8d2/0xb30 [ 38.562157] do_mprotect_pkey+0x87e/0xd40 [ 38.562509] __x64_sys_mprotect+0x78/0xc0 [ 38.562890] do_syscall_64+0x3f/0x90 [ 38.563214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.563648] [ 38.563791] Freed by task 13: [ 38.564044] kasan_save_stack+0x22/0x50 [ 38.564379] kasan_set_track+0x25/0x30 [ 38.564710] kasan_save_free_info+0x2b/0x50 [ 38.565067] __kasan_slab_free+0x10a/0x190 [ 38.565421] kmem_cache_free+0x10d/0x4d0 [ 38.565761] rcu_core+0x8c8/0x2860 [ 38.566060] __do_softirq+0x1b7/0x7d4 [ 38.566383] [ 38.566531] Last potentially related work creation: [ 38.566941] kasan_save_stack+0x22/0x50 [ 38.567282] __kasan_record_aux_stack+0x8e/0xa0 [ 38.567663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.568088] remove_vma+0x139/0x170 [ 38.568390] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.568763] do_vmi_munmap+0x1f1/0x2b0 [ 38.569090] __vm_munmap+0x138/0x3a0 [ 38.569403] __x64_sys_munmap+0x59/0x80 [ 38.569737] do_syscall_64+0x3f/0x90 [ 38.570057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.570483] [ 38.570631] The buggy address belongs to the object at ffff88800ec50828 [ 38.570631] which belongs to the cache vm_area_struct of size 168 [ 38.571602] The buggy address is located 88 bytes inside of [ 38.571602] freed 168-byte region [ffff88800ec50828, ffff88800ec508d0) [ 38.572514] [ 38.572661] The buggy address belongs to the physical page: [ 38.573095] page:00000000f0c33cc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec50 [ 38.573800] memcg:ffff88800ef10c01 [ 38.574085] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.574545] page_type: 0xffffffff() [ 38.574874] raw: 0100000000000200 ffff8880087a0c80 ffffea000035ffc0 dead000000000003 [ 38.575485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef10c01 [ 38.576073] page dumped because: kasan: bad access detected [ 38.576503] [ 38.576648] Memory state around the buggy address: [ 38.577029] ffff88800ec50780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.577592] ffff88800ec50800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.578151] >ffff88800ec50880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.578707] ^ [ 38.579001] ffff88800ec50900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.579563] ffff88800ec50980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.580125] ================================================================== [ 38.580818] Disabling lock debugging due to kernel taint [ 41.507912] BUG: Bad rss-counter state mm:0000000073366125 type:MM_FILEPAGES val:33 [ 41.508799] BUG: Bad rss-counter state mm:0000000073366125 type:MM_ANONPAGES val:22 [ 43.624622] BUG: Bad rss-counter state mm:00000000e132460a type:MM_FILEPAGES val:33 [ 43.625403] BUG: Bad rss-counter state mm:00000000e132460a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20590' (ECDSA) to the list of known hosts. 2023/06/21 08:18:16 fuzzer started 2023/06/21 08:18:16 dialing manager at localhost:36067 2023/06/21 08:18:16 checking machine... 2023/06/21 08:18:16 checking revisions... [ 44.622255] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:18:16 testing simple program... [ 44.684732] cgroup: Unknown subsys name 'net' [ 44.767157] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:18:16 Registers: info registers vcpu 0 RAX=0000001de2c848f8 RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000001d RSI=ffff88806ce28140 RDI=00000000000103f2 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=000000000002e81b R11=ffff88806ce09ff8 R12=00000000000103f2 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000217 [----APC] 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=000055fc11d61518 CR3=000000000ddce000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f14fe702c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=79732036373133343931203535373043 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000fd1a RBX=ffffffff87b6c480 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=ffffffff813fea34 RDI=ffffffff87b6c480 RBP=ffffffff87b6c480 RSP=ffff88806cf09c80 R8 =0000000000000005 R9 =000000003b9ac9ff R10=0000000058924b1c R11=ffff88806cf09ff8 R12=0000000000000000 R13=ffffffff87b6c510 R14=0000000058924b1c R15=ffffffff87b6c4a8 RIP=ffffffff813fea3a RFL=00000046 [---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 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=00007faa47676328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000