syzkaller login: [ 30.834664] BUG: Bad rss-counter state mm:00000000f7a429c1 type:MM_FILEPAGES val:33 [ 30.835691] BUG: Bad rss-counter state mm:00000000f7a429c1 type:MM_ANONPAGES val:22 [ 31.002410] ================================================================== [ 31.003386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.004258] Read of size 8 at addr ffff88800c7055c8 by task sshd/219 [ 31.005100] [ 31.005321] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.006176] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.007153] Call Trace: [ 31.007475] [ 31.007755] dump_stack_lvl+0x91/0xf0 [ 31.008259] print_report+0xcc/0x620 [ 31.008734] ? __virt_addr_valid+0x102/0x340 [ 31.009281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.009888] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.010514] kasan_report+0xbe/0xf0 [ 31.010983] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011613] vma_interval_tree_remove+0xc75/0xec0 [ 31.012231] vma_prepare+0xc54/0x11a0 [ 31.012748] __split_vma+0x5af/0x950 [ 31.013262] ? __pfx___split_vma+0x10/0x10 [ 31.013837] ? find_held_lock+0x2c/0x110 [ 31.014433] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.015047] ? lock_is_held_type+0x9f/0x120 [ 31.015627] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.016301] ? mtree_range_walk+0x632/0x900 [ 31.016905] ? mas_walk+0x5c7/0x7c0 [ 31.017427] do_vmi_munmap+0x1f1/0x2b0 [ 31.017956] mmap_region+0x1f9/0x2660 [ 31.018499] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.019051] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.019824] ? __pfx_lock_acquire+0x10/0x10 [ 31.020397] ? __pfx_mmap_region+0x10/0x10 [ 31.020969] ? security_mmap_addr+0x7d/0xa0 [ 31.021542] ? get_unmapped_area+0x1f5/0x3f0 [ 31.022139] do_mmap+0x854/0xf00 [ 31.022639] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.023172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.023779] ksys_mmap_pgoff+0x3af/0x500 [ 31.024332] do_syscall_64+0x3f/0x90 [ 31.024850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.025549] RIP: 0033:0x7fa3078b3d82 [ 31.026041] 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 [ 31.028369] RSP: 002b:00007fff4bf9b478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.029353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3078b3d82 [ 31.030292] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa306ced000 [ 31.031215] RBP: 00007fa306ced000 R08: 0000000000000009 R09: 0000000000001000 [ 31.032137] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c34a2e5ec0 [ 31.033069] R13: 00007fff4bf9b490 R14: 00007fff4bf9b4c0 R15: 00007fff4bf9b820 [ 31.033997] [ 31.034318] [ 31.034555] Allocated by task 212: [ 31.035021] kasan_save_stack+0x22/0x50 [ 31.035569] kasan_set_track+0x25/0x30 [ 31.036103] __kasan_slab_alloc+0x59/0x70 [ 31.036670] kmem_cache_alloc+0x16b/0x370 [ 31.037240] vm_area_dup+0x20/0x160 [ 31.037727] __split_vma+0x170/0x950 [ 31.038233] split_vma+0xc6/0x110 [ 31.038736] mprotect_fixup+0x8d2/0xb30 [ 31.039273] do_mprotect_pkey+0x87e/0xd40 [ 31.039838] __x64_sys_mprotect+0x78/0xc0 [ 31.040405] do_syscall_64+0x3f/0x90 [ 31.040919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041621] [ 31.041850] Freed by task 209: [ 31.042299] kasan_save_stack+0x22/0x50 [ 31.042855] kasan_set_track+0x25/0x30 [ 31.043387] kasan_save_free_info+0x2b/0x50 [ 31.043960] __kasan_slab_free+0x10a/0x190 [ 31.044540] kmem_cache_free+0x10d/0x4d0 [ 31.045100] rcu_core+0x8c8/0x2860 [ 31.045583] __do_softirq+0x1b7/0x7d4 [ 31.046111] [ 31.046365] Last potentially related work creation: [ 31.046995] kasan_save_stack+0x22/0x50 [ 31.047539] __kasan_record_aux_stack+0x8e/0xa0 [ 31.048162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.048862] remove_vma+0x139/0x170 [ 31.049355] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.049966] do_vmi_munmap+0x1f1/0x2b0 [ 31.050523] __vm_munmap+0x138/0x3a0 [ 31.051039] __x64_sys_munmap+0x59/0x80 [ 31.051579] do_syscall_64+0x3f/0x90 [ 31.052098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.052795] [ 31.053030] The buggy address belongs to the object at ffff88800c705570 [ 31.053030] which belongs to the cache vm_area_struct of size 168 [ 31.054643] The buggy address is located 88 bytes inside of [ 31.054643] freed 168-byte region [ffff88800c705570, ffff88800c705618) [ 31.056161] [ 31.056394] The buggy address belongs to the physical page: [ 31.057104] page:000000003cd9ab6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc705 [ 31.058310] memcg:ffff888013acb901 [ 31.058775] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.059479] page_type: 0xffffffff() [ 31.059964] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.060959] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013acb901 [ 31.061956] page dumped because: kasan: bad access detected [ 31.062678] [ 31.062908] Memory state around the buggy address: [ 31.063531] ffff88800c705480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.064457] ffff88800c705500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.065387] >ffff88800c705580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.066318] ^ [ 31.067038] ffff88800c705600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.067950] ffff88800c705680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.068868] ================================================================== [ 31.069948] Disabling lock debugging due to kernel taint [ 33.063379] BUG: Bad rss-counter state mm:000000009d87429c type:MM_FILEPAGES val:33 [ 33.064557] BUG: Bad rss-counter state mm:000000009d87429c type:MM_ANONPAGES val:22 [ 33.574386] BUG: Bad rss-counter state mm:000000006144f613 type:MM_FILEPAGES val:33 [ 33.575578] BUG: Bad rss-counter state mm:000000006144f613 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43492' (ECDSA) to the list of known hosts. 2023/06/21 03:27:59 fuzzer started 2023/06/21 03:27:59 dialing manager at localhost:36067 2023/06/21 03:27:59 checking machine... 2023/06/21 03:27:59 checking revisions... [ 34.338142] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:28:00 testing simple program... [ 34.382863] cgroup: Unknown subsys name 'net' [ 34.425986] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:59 Registers: info registers vcpu 0 RAX=ffffffff83636216 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002da7ec0 RSI=ffffffff83636216 RDI=ffff888016d3f670 RBP=ffff888016d3f640 RSP=ffff888016d3f5a0 R8 =0000000000000001 R9 =ffff888016d3f5e8 R10=0000000000038001 R11=000000000008a835 R12=ffff888016d3f670 R13=0000000000000000 R14=ffff888016e31b40 R15=0000000000000000 RIP=ffffffff84538440 RFL=00000282 [--S----] 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 00007f4656d68900 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=00007f465731f618 CR3=000000000986c000 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=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=00007f46573200b0 CR3=00000000181c0000 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=2039353a37323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a37323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000