syzkaller login: [ 38.969071] BUG: Bad rss-counter state mm:000000003010f0b0 type:MM_FILEPAGES val:33 [ 38.970268] BUG: Bad rss-counter state mm:000000003010f0b0 type:MM_ANONPAGES val:22 [ 39.011902] ================================================================== [ 39.013032] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.014024] Read of size 8 at addr ffff888018dc3880 by task sshd/219 [ 39.014990] [ 39.015237] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.016316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.017347] Call Trace: [ 39.017682] [ 39.017999] dump_stack_lvl+0x91/0xf0 [ 39.018522] print_report+0xcc/0x620 [ 39.019038] ? __virt_addr_valid+0x102/0x340 [ 39.019658] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.020315] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.020978] kasan_report+0xbe/0xf0 [ 39.021487] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.022147] vma_interval_tree_remove+0xc75/0xec0 [ 39.022793] vma_prepare+0xc54/0x11a0 [ 39.023324] __split_vma+0x5af/0x950 [ 39.023832] ? __pfx___split_vma+0x10/0x10 [ 39.024402] ? find_held_lock+0x2c/0x110 [ 39.024959] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.025563] ? lock_is_held_type+0x9f/0x120 [ 39.026144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.026800] ? mtree_range_walk+0x632/0x900 [ 39.027402] ? mas_walk+0x5c7/0x7c0 [ 39.027907] do_vmi_munmap+0x1f1/0x2b0 [ 39.028428] mmap_region+0x1f9/0x2660 [ 39.028941] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.029485] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.030243] ? __pfx_lock_acquire+0x10/0x10 [ 39.030810] ? __pfx_mmap_region+0x10/0x10 [ 39.031399] ? security_mmap_addr+0x7d/0xa0 [ 39.031962] ? get_unmapped_area+0x1f5/0x3f0 [ 39.032553] do_mmap+0x854/0xf00 [ 39.033043] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.033599] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.034221] ksys_mmap_pgoff+0x3af/0x500 [ 39.034785] do_syscall_64+0x3f/0x90 [ 39.035326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.036046] RIP: 0033:0x7ff13c8bbd82 [ 39.036552] 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 [ 39.038927] RSP: 002b:00007ffcdb3a8688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.039946] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff13c8bbd82 [ 39.040892] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff13bcf5000 [ 39.041839] RBP: 00007ff13bcf5000 R08: 0000000000000009 R09: 0000000000001000 [ 39.042784] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf98313f70 [ 39.043751] R13: 00007ffcdb3a86a0 R14: 00007ffcdb3a86d0 R15: 00007ffcdb3a8a30 [ 39.044706] [ 39.045031] [ 39.045270] Allocated by task 212: [ 39.045749] kasan_save_stack+0x22/0x50 [ 39.046311] kasan_set_track+0x25/0x30 [ 39.046859] __kasan_slab_alloc+0x59/0x70 [ 39.047455] kmem_cache_alloc+0x16b/0x370 [ 39.048028] vm_area_dup+0x20/0x160 [ 39.048533] __split_vma+0x170/0x950 [ 39.049054] split_vma+0xc6/0x110 [ 39.049548] mprotect_fixup+0x8d2/0xb30 [ 39.050106] do_mprotect_pkey+0x87e/0xd40 [ 39.050685] __x64_sys_mprotect+0x78/0xc0 [ 39.051279] do_syscall_64+0x3f/0x90 [ 39.051806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.052523] [ 39.052761] Freed by task 212: [ 39.053196] kasan_save_stack+0x22/0x50 [ 39.053755] kasan_set_track+0x25/0x30 [ 39.054303] kasan_save_free_info+0x2b/0x50 [ 39.054895] __kasan_slab_free+0x10a/0x190 [ 39.055507] kmem_cache_free+0x10d/0x4d0 [ 39.056075] rcu_core+0x8c8/0x2860 [ 39.056571] __do_softirq+0x1b7/0x7d4 [ 39.057169] [ 39.057406] Last potentially related work creation: [ 39.058055] kasan_save_stack+0x22/0x50 [ 39.058622] __kasan_record_aux_stack+0x8e/0xa0 [ 39.059273] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.059983] remove_vma+0x139/0x170 [ 39.060487] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.061106] do_vmi_munmap+0x1f1/0x2b0 [ 39.061644] __vm_munmap+0x138/0x3a0 [ 39.062161] __x64_sys_munmap+0x59/0x80 [ 39.062714] do_syscall_64+0x3f/0x90 [ 39.063273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.063989] [ 39.064226] The buggy address belongs to the object at ffff888018dc3828 [ 39.064226] which belongs to the cache vm_area_struct of size 168 [ 39.065863] The buggy address is located 88 bytes inside of [ 39.065863] freed 168-byte region [ffff888018dc3828, ffff888018dc38d0) [ 39.067430] [ 39.067666] The buggy address belongs to the physical page: [ 39.068404] page:000000003c2d031a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18dc3 [ 39.069621] memcg:ffff888015ed4b01 [ 39.070093] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.070811] page_type: 0xffffffff() [ 39.071326] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.072345] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ed4b01 [ 39.073353] page dumped because: kasan: bad access detected [ 39.074091] [ 39.074327] Memory state around the buggy address: [ 39.074976] ffff888018dc3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.075946] ffff888018dc3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.076904] >ffff888018dc3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.077851] ^ [ 39.078304] ffff888018dc3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.079265] ffff888018dc3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.080214] ================================================================== [ 39.081247] Disabling lock debugging due to kernel taint [ 41.104464] BUG: Bad rss-counter state mm:000000005f4fd287 type:MM_FILEPAGES val:33 [ 41.105646] BUG: Bad rss-counter state mm:000000005f4fd287 type:MM_ANONPAGES val:22 [ 41.670479] BUG: Bad rss-counter state mm:0000000022aec61a type:MM_FILEPAGES val:33 [ 41.671685] BUG: Bad rss-counter state mm:0000000022aec61a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60554' (ECDSA) to the list of known hosts. 2023/06/21 05:49:42 fuzzer started 2023/06/21 05:49:42 dialing manager at localhost:36067 2023/06/21 05:49:42 checking machine... 2023/06/21 05:49:42 checking revisions... [ 42.320550] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:49:42 testing simple program... [ 42.367152] cgroup: Unknown subsys name 'net' [ 42.407394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:49:42 Registers: info registers vcpu 0 RAX=00ffffffffffffff RBX=ffff8880142c0330 RCX=0000000000000038 RDX=ffff8880165c9b40 RSI=ffffffff818d5225 RDI=0000000000000000 RBP=0000000000000007 RSP=ffff8880166978a8 R8 =0000000000000005 R9 =0000000000000007 R10=0000000000000007 R11=0000000000000001 R12=2f00000000000000 R13=2f646d6574737973 R14=dffffc0000000000 R15=ffff8880142c0360 RIP=ffffffff818d523b RFL=00000297 [--S-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 00007f73a0805900 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=00007f73a0dba650 CR3=000000000d8b6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f4cbb0a03f0 CR3=000000000ca38000 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=9481498de0d6c5962a455224616f2a4d XMM02=000000000011bf88ec2efd57dc4c00df XMM03=0000000000122190be525ce6180b1d50 XMM04=4558fbc7fcbe8c9a00000000000ae988 XMM05=752962b574c3bd9f0000000000132e40 XMM06=806171799158d9670000000000131b70 XMM07=e042d86d42eb936e0000000000122468 XMM08=be525ce6180b1d50000000000011bfe8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000