syzkaller login: [ 31.860044] BUG: Bad rss-counter state mm:00000000f8598a05 type:MM_FILEPAGES val:33 [ 31.861442] BUG: Bad rss-counter state mm:00000000f8598a05 type:MM_ANONPAGES val:22 [ 32.011997] ================================================================== [ 32.013065] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.014178] Read of size 8 at addr ffff88800d9a1880 by task sshd/220 [ 32.015229] [ 32.015483] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.016512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.017696] Call Trace: [ 32.018106] [ 32.018439] dump_stack_lvl+0x91/0xf0 [ 32.019038] print_report+0xcc/0x620 [ 32.019594] ? __virt_addr_valid+0x102/0x340 [ 32.020220] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.020935] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.021629] kasan_report+0xbe/0xf0 [ 32.022183] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.022899] vma_interval_tree_remove+0xc75/0xec0 [ 32.023593] vma_prepare+0xc54/0x11a0 [ 32.024172] __split_vma+0x5af/0x950 [ 32.024722] ? __pfx___split_vma+0x10/0x10 [ 32.025343] ? find_held_lock+0x2c/0x110 [ 32.025972] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.026631] ? lock_is_held_type+0x9f/0x120 [ 32.027289] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.028019] ? mtree_range_walk+0x632/0x900 [ 32.028675] ? mas_walk+0x5c7/0x7c0 [ 32.029247] do_vmi_munmap+0x1f1/0x2b0 [ 32.029834] mmap_region+0x1f9/0x2660 [ 32.030420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.031045] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.031904] ? __pfx_lock_acquire+0x10/0x10 [ 32.032522] ? __pfx_mmap_region+0x10/0x10 [ 32.033171] ? security_mmap_addr+0x7d/0xa0 [ 32.033785] ? get_unmapped_area+0x1f5/0x3f0 [ 32.034457] do_mmap+0x854/0xf00 [ 32.035012] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.035590] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.036265] ksys_mmap_pgoff+0x3af/0x500 [ 32.036870] do_syscall_64+0x3f/0x90 [ 32.037430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.038217] RIP: 0033:0x7fc32533fd82 [ 32.038766] 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 [ 32.041006] RSP: 002b:00007ffebbdd4568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.041941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc32533fd82 [ 32.042797] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc324779000 [ 32.043655] RBP: 00007fc324779000 R08: 0000000000000009 R09: 0000000000001000 [ 32.044528] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650b0b1ef70 [ 32.045385] R13: 00007ffebbdd4580 R14: 00007ffebbdd45b0 R15: 00007ffebbdd4910 [ 32.046272] [ 32.046567] [ 32.046813] Allocated by task 213: [ 32.047259] kasan_save_stack+0x22/0x50 [ 32.047769] kasan_set_track+0x25/0x30 [ 32.048415] __kasan_slab_alloc+0x59/0x70 [ 32.048978] kmem_cache_alloc+0x16b/0x370 [ 32.049500] vm_area_dup+0x20/0x160 [ 32.049980] __split_vma+0x170/0x950 [ 32.050454] split_vma+0xc6/0x110 [ 32.050936] mprotect_fixup+0x8d2/0xb30 [ 32.051453] do_mprotect_pkey+0x87e/0xd40 [ 32.052001] __x64_sys_mprotect+0x78/0xc0 [ 32.052526] do_syscall_64+0x3f/0x90 [ 32.053022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.053674] [ 32.053909] Freed by task 213: [ 32.054303] kasan_save_stack+0x22/0x50 [ 32.054846] kasan_set_track+0x25/0x30 [ 32.055356] kasan_save_free_info+0x2b/0x50 [ 32.056001] __kasan_slab_free+0x10a/0x190 [ 32.056538] kmem_cache_free+0x10d/0x4d0 [ 32.057066] rcu_core+0x8c8/0x2860 [ 32.057511] __do_softirq+0x1b7/0x7d4 [ 32.058009] [ 32.058224] Last potentially related work creation: [ 32.058850] kasan_save_stack+0x22/0x50 [ 32.059368] __kasan_record_aux_stack+0x8e/0xa0 [ 32.059970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.060627] remove_vma+0x139/0x170 [ 32.061096] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.061671] do_vmi_munmap+0x1f1/0x2b0 [ 32.062179] __vm_munmap+0x138/0x3a0 [ 32.062662] __x64_sys_munmap+0x59/0x80 [ 32.063215] do_syscall_64+0x3f/0x90 [ 32.063710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.064390] [ 32.064613] The buggy address belongs to the object at ffff88800d9a1828 [ 32.064613] which belongs to the cache vm_area_struct of size 168 [ 32.066131] The buggy address is located 88 bytes inside of [ 32.066131] freed 168-byte region [ffff88800d9a1828, ffff88800d9a18d0) [ 32.067605] [ 32.067840] The buggy address belongs to the physical page: [ 32.068533] page:00000000e65e4177 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9a1 [ 32.069648] memcg:ffff88800cdc5d01 [ 32.070093] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.070843] page_type: 0xffffffff() [ 32.071299] raw: 0100000000000200 ffff88800879fc80 ffffea0000313940 dead000000000003 [ 32.072279] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cdc5d01 [ 32.073238] page dumped because: kasan: bad access detected [ 32.073941] [ 32.074167] Memory state around the buggy address: [ 32.074788] ffff88800d9a1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.075695] ffff88800d9a1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.076597] >ffff88800d9a1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.077502] ^ [ 32.077951] ffff88800d9a1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.078863] ffff88800d9a1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.079741] ================================================================== [ 32.080724] Disabling lock debugging due to kernel taint [ 34.102374] BUG: Bad rss-counter state mm:0000000090d4b654 type:MM_FILEPAGES val:33 [ 34.103790] BUG: Bad rss-counter state mm:0000000090d4b654 type:MM_ANONPAGES val:22 [ 34.488249] BUG: Bad rss-counter state mm:0000000085646610 type:MM_FILEPAGES val:33 [ 34.489355] BUG: Bad rss-counter state mm:0000000085646610 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20881' (ECDSA) to the list of known hosts. 2023/06/19 20:19:35 fuzzer started 2023/06/19 20:19:35 dialing manager at localhost:44161 2023/06/19 20:19:35 checking machine... 2023/06/19 20:19:35 checking revisions... [ 35.236153] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:19:35 testing simple program... [ 35.271917] cgroup: Unknown subsys name 'net' [ 35.319819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:19:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009bb7a70 RCX=0000000000000001 RDX=1ffff11001376f4f RSI=ffffffff818086d7 RDI=ffff888009bb7a78 RBP=0000000000000003 RSP=ffff888009bb7988 R8 =0000000000000001 R9 =ffff888009bb79e8 R10=0000000000038001 R11=0000000000020de7 R12=ffff888009bb7a70 R13=0000000000000000 R14=ffff88801a009b40 R15=0000000000000cc0 RIP=ffffffff813ad47f RFL=00000287 [--S--PC] 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 00007fbb53a89900 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=00007fbb54040618 CR3=000000000f272000 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=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 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=00007f68bec19160 CR3=000000000c4c4000 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=198f453d945a649b6a494cf8b8efa6da XMM02=ec2efd57dc4c00df000000000011cf00 XMM03=18ffe345fb6a6d67000000000011cfd0 XMM04=b2138f723be03aea00000000000ae988 XMM05=19e9129bd510f2350000000000133548 XMM06=e714f05a0bab15750000000000131fb8 XMM07=e042d86d42eb936e0000000000123c90 XMM08=18ffe345fb6a6d67000000000011cfd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000