syzkaller login: [ 31.841294] BUG: Bad rss-counter state mm:00000000705867f6 type:MM_FILEPAGES val:33 [ 31.842148] BUG: Bad rss-counter state mm:00000000705867f6 type:MM_ANONPAGES val:22 [ 31.985997] ================================================================== [ 31.986585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.987199] Read of size 8 at addr ffff88800e6805c8 by task sshd/219 [ 31.988020] [ 31.988165] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.988716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.990392] Call Trace: [ 31.990610] [ 31.990795] dump_stack_lvl+0x91/0xf0 [ 31.991118] print_report+0xcc/0x620 [ 31.991443] ? __virt_addr_valid+0x102/0x340 [ 31.991801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.992218] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.992641] kasan_report+0xbe/0xf0 [ 31.992946] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.993372] vma_interval_tree_remove+0xc75/0xec0 [ 31.993810] vma_prepare+0xc54/0x11a0 [ 31.994125] __split_vma+0x5af/0x950 [ 31.994437] ? __pfx___split_vma+0x10/0x10 [ 31.994776] ? find_held_lock+0x2c/0x110 [ 31.995111] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.995474] ? lock_is_held_type+0x9f/0x120 [ 31.995816] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.996201] ? mtree_range_walk+0x632/0x900 [ 31.996563] ? mas_walk+0x5c7/0x7c0 [ 31.996864] do_vmi_munmap+0x1f1/0x2b0 [ 31.997172] mmap_region+0x1f9/0x2660 [ 31.997590] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.997924] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.998355] ? __pfx_lock_acquire+0x10/0x10 [ 31.998672] ? __pfx_mmap_region+0x10/0x10 [ 31.998996] ? security_mmap_addr+0x7d/0xa0 [ 31.999325] ? get_unmapped_area+0x1f5/0x3f0 [ 31.999654] do_mmap+0x854/0xf00 [ 31.999917] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.000212] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.000547] ksys_mmap_pgoff+0x3af/0x500 [ 32.000847] do_syscall_64+0x3f/0x90 [ 32.001131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.001569] RIP: 0033:0x7f7d37b36d82 [ 32.001835] 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 [ 32.003077] RSP: 002b:00007ffd143e4f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.003636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d37b36d82 [ 32.004131] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d36f70000 [ 32.004675] RBP: 00007f7d36f70000 R08: 0000000000000009 R09: 0000000000001000 [ 32.005192] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640d342bec0 [ 32.005725] R13: 00007ffd143e4f50 R14: 00007ffd143e4f80 R15: 00007ffd143e52e0 [ 32.006236] [ 32.006412] [ 32.006541] Allocated by task 212: [ 32.006794] kasan_save_stack+0x22/0x50 [ 32.007098] kasan_set_track+0x25/0x30 [ 32.007390] __kasan_slab_alloc+0x59/0x70 [ 32.007699] kmem_cache_alloc+0x16b/0x370 [ 32.008005] vm_area_dup+0x20/0x160 [ 32.008275] __split_vma+0x170/0x950 [ 32.008558] split_vma+0xc6/0x110 [ 32.008820] mprotect_fixup+0x8d2/0xb30 [ 32.009120] do_mprotect_pkey+0x87e/0xd40 [ 32.009449] __x64_sys_mprotect+0x78/0xc0 [ 32.009760] do_syscall_64+0x3f/0x90 [ 32.010041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.010425] [ 32.010554] Freed by task 212: [ 32.010790] kasan_save_stack+0x22/0x50 [ 32.011090] kasan_set_track+0x25/0x30 [ 32.011382] kasan_save_free_info+0x2b/0x50 [ 32.011698] __kasan_slab_free+0x10a/0x190 [ 32.012016] kmem_cache_free+0x10d/0x4d0 [ 32.012316] rcu_core+0x8c8/0x2860 [ 32.012585] __do_softirq+0x1b7/0x7d4 [ 32.012868] [ 32.012998] Last potentially related work creation: [ 32.013391] kasan_save_stack+0x22/0x50 [ 32.013688] __kasan_record_aux_stack+0x8e/0xa0 [ 32.014026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.014409] remove_vma+0x139/0x170 [ 32.014674] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.015006] do_vmi_munmap+0x1f1/0x2b0 [ 32.015294] __vm_munmap+0x138/0x3a0 [ 32.015573] __x64_sys_munmap+0x59/0x80 [ 32.015878] do_syscall_64+0x3f/0x90 [ 32.016187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.016595] [ 32.016731] The buggy address belongs to the object at ffff88800e680570 [ 32.016731] which belongs to the cache vm_area_struct of size 168 [ 32.017691] The buggy address is located 88 bytes inside of [ 32.017691] freed 168-byte region [ffff88800e680570, ffff88800e680618) [ 32.018581] [ 32.018718] The buggy address belongs to the physical page: [ 32.019128] page:0000000039fd5ac1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe680 [ 32.019808] memcg:ffff88800f146401 [ 32.020080] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.020491] page_type: 0xffffffff() [ 32.020775] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.021475] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f146401 [ 32.022034] page dumped because: kasan: bad access detected [ 32.022443] [ 32.022584] Memory state around the buggy address: [ 32.022947] ffff88800e680480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.023483] ffff88800e680500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.024023] >ffff88800e680580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.024557] ^ [ 32.024971] ffff88800e680600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.025588] ffff88800e680680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.026205] ================================================================== [ 32.027088] Disabling lock debugging due to kernel taint [ 36.059499] BUG: Bad rss-counter state mm:000000003fe3d665 type:MM_FILEPAGES val:33 [ 36.060354] BUG: Bad rss-counter state mm:000000003fe3d665 type:MM_ANONPAGES val:22 [ 36.972438] BUG: Bad rss-counter state mm:0000000047dda3dd type:MM_FILEPAGES val:33 [ 36.973096] BUG: Bad rss-counter state mm:0000000047dda3dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15093' (ECDSA) to the list of known hosts. 2023/06/20 10:05:12 fuzzer started 2023/06/20 10:05:13 dialing manager at localhost:44161 2023/06/20 10:05:13 checking machine... 2023/06/20 10:05:13 checking revisions... [ 37.984327] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:05:13 testing simple program... [ 38.040672] cgroup: Unknown subsys name 'net' [ 38.154463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:05:11 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff82505fe5 RDI=ffffffff87f6c0a0 RBP=ffffffff87f6c060 RSP=ffff888019247a80 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000020 R11=000000003a475542 R12=0000000000000020 R13=ffffffff87f6c060 R14=0000000000000010 R15=ffffffff82505fd0 RIP=ffffffff8250603d 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 00007f1ec63cc900 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=00007f7cb5803328 CR3=000000000ef08000 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=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=00007f10ee042b60 CR3=000000000c4aa000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=14bdc86cd2324f840000000000134870 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=a7b5e84aba09e0e500000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000