syzkaller login: [ 39.048739] BUG: Bad rss-counter state mm:00000000aa2efe67 type:MM_FILEPAGES val:33 [ 39.049495] BUG: Bad rss-counter state mm:00000000aa2efe67 type:MM_ANONPAGES val:22 [ 39.253099] ================================================================== [ 39.253963] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.254590] Read of size 8 at addr ffff88800e000968 by task sshd/222 [ 39.255097] [ 39.255246] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.255812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.256451] Call Trace: [ 39.256670] [ 39.256865] dump_stack_lvl+0x91/0xf0 [ 39.257397] print_report+0xcc/0x620 [ 39.257706] ? __virt_addr_valid+0x102/0x340 [ 39.258350] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.258761] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.259170] kasan_report+0xbe/0xf0 [ 39.259482] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.259911] vma_interval_tree_remove+0xc75/0xec0 [ 39.260299] vma_prepare+0xc54/0x11a0 [ 39.260610] __split_vma+0x5af/0x950 [ 39.260920] ? __pfx___split_vma+0x10/0x10 [ 39.264631] ? find_held_lock+0x2c/0x110 [ 39.265017] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.265427] ? lock_is_held_type+0x9f/0x120 [ 39.265782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.266171] ? mtree_range_walk+0x632/0x900 [ 39.266530] ? mas_walk+0x5c7/0x7c0 [ 39.266840] do_vmi_munmap+0x1f1/0x2b0 [ 39.267155] mmap_region+0x1f9/0x2660 [ 39.267466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.267798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.268262] ? __pfx_lock_acquire+0x10/0x10 [ 39.268607] ? __pfx_mmap_region+0x10/0x10 [ 39.268946] ? security_mmap_addr+0x7d/0xa0 [ 39.269397] ? get_unmapped_area+0x1f5/0x3f0 [ 39.269754] do_mmap+0x854/0xf00 [ 39.270046] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.270368] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.270729] ksys_mmap_pgoff+0x3af/0x500 [ 39.271062] do_syscall_64+0x3f/0x90 [ 39.271377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.271794] RIP: 0033:0x7fc18f652d82 [ 39.272089] 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 [ 39.273455] RSP: 002b:00007fffd4b3d478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.274017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc18f652d82 [ 39.274558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc18ea8c000 [ 39.275103] RBP: 00007fc18ea8c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.275650] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c4d169b20 [ 39.276185] R13: 00007fffd4b3d490 R14: 00007fffd4b3d4c0 R15: 00007fffd4b3d820 [ 39.276732] [ 39.276924] [ 39.277064] Allocated by task 213: [ 39.278869] kasan_save_stack+0x22/0x50 [ 39.279203] kasan_set_track+0x25/0x30 [ 39.279525] __kasan_slab_alloc+0x59/0x70 [ 39.279863] kmem_cache_alloc+0x16b/0x370 [ 39.280196] vm_area_dup+0x20/0x160 [ 39.280493] __split_vma+0x170/0x950 [ 39.280795] split_vma+0xc6/0x110 [ 39.281079] mprotect_fixup+0x8d2/0xb30 [ 39.281444] do_mprotect_pkey+0x87e/0xd40 [ 39.281777] __x64_sys_mprotect+0x78/0xc0 [ 39.282112] do_syscall_64+0x3f/0x90 [ 39.282421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.282836] [ 39.282977] Freed by task 211: [ 39.283230] kasan_save_stack+0x22/0x50 [ 39.283557] kasan_set_track+0x25/0x30 [ 39.283878] kasan_save_free_info+0x2b/0x50 [ 39.284222] __kasan_slab_free+0x10a/0x190 [ 39.284567] kmem_cache_free+0x10d/0x4d0 [ 39.284893] rcu_core+0x8c8/0x2860 [ 39.285180] __do_softirq+0x1b7/0x7d4 [ 39.285515] [ 39.285656] Last potentially related work creation: [ 39.286029] kasan_save_stack+0x22/0x50 [ 39.286360] __kasan_record_aux_stack+0x8e/0xa0 [ 39.286726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.287144] remove_vma+0x139/0x170 [ 39.287437] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.287793] do_vmi_munmap+0x1f1/0x2b0 [ 39.288105] __vm_munmap+0x138/0x3a0 [ 39.288407] __x64_sys_munmap+0x59/0x80 [ 39.288730] do_syscall_64+0x3f/0x90 [ 39.289037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.289482] [ 39.289621] Second to last potentially related work creation: [ 39.290058] kasan_save_stack+0x22/0x50 [ 39.290384] __kasan_record_aux_stack+0x8e/0xa0 [ 39.290753] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.291171] remove_vma+0x139/0x170 [ 39.291462] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.291822] do_vmi_munmap+0x1f1/0x2b0 [ 39.292137] __vm_munmap+0x138/0x3a0 [ 39.292439] __x64_sys_munmap+0x59/0x80 [ 39.292762] do_syscall_64+0x3f/0x90 [ 39.293070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.293532] [ 39.293673] The buggy address belongs to the object at ffff88800e000910 [ 39.293673] which belongs to the cache vm_area_struct of size 168 [ 39.294605] The buggy address is located 88 bytes inside of [ 39.294605] freed 168-byte region [ffff88800e000910, ffff88800e0009b8) [ 39.295494] [ 39.295636] The buggy address belongs to the physical page: [ 39.296057] page:00000000d84222a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe000 [ 39.296749] memcg:ffff88800e132301 [ 39.297030] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.297470] page_type: 0xffffffff() [ 39.297761] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.298349] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e132301 [ 39.298921] page dumped because: kasan: bad access detected [ 39.299342] [ 39.299483] Memory state around the buggy address: [ 39.299854] ffff88800e000800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.300403] ffff88800e000880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.300947] >ffff88800e000900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.301521] ^ [ 39.302016] ffff88800e000980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.302557] ffff88800e000a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.303103] ================================================================== [ 39.303895] Disabling lock debugging due to kernel taint [ 42.221026] BUG: Bad rss-counter state mm:00000000ea851be8 type:MM_FILEPAGES val:33 [ 42.221761] BUG: Bad rss-counter state mm:00000000ea851be8 type:MM_ANONPAGES val:22 [ 43.646052] BUG: Bad rss-counter state mm:000000005aa601ab type:MM_FILEPAGES val:33 [ 43.646732] BUG: Bad rss-counter state mm:000000005aa601ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7014' (ECDSA) to the list of known hosts. 2023/06/21 08:09:01 fuzzer started 2023/06/21 08:09:01 dialing manager at localhost:36067 2023/06/21 08:09:01 checking machine... 2023/06/21 08:09:01 checking revisions... 2023/06/21 08:09:01 testing simple program... [ 44.635171] kmemleak: Automatic memory scanning thread ended [ 44.679807] cgroup: Unknown subsys name 'net' [ 44.727613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:09:00 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff888008d9fbf8 RSP=ffff888008d9fb30 R8 =0000000000000001 R9 =ffffed10011b3f72 R10=ffff888008d9fb97 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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=00007f3add3f2328 CR3=00000000143a4000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9f1f7f66f8 CR3=000000000fa7e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000