syzkaller login: [ 30.884146] BUG: Bad rss-counter state mm:000000009f58ab48 type:MM_FILEPAGES val:33 [ 30.884958] BUG: Bad rss-counter state mm:000000009f58ab48 type:MM_ANONPAGES val:22 [ 31.021250] ================================================================== [ 31.021951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.022683] Read of size 8 at addr ffff888019bd2df0 by task sshd/220 [ 31.023278] [ 31.023449] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.024210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.024970] Call Trace: [ 31.025213] [ 31.025429] dump_stack_lvl+0x91/0xf0 [ 31.025806] print_report+0xcc/0x620 [ 31.026193] ? __virt_addr_valid+0x102/0x340 [ 31.026609] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.027073] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.027540] kasan_report+0xbe/0xf0 [ 31.027898] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.028365] vma_interval_tree_remove+0xc75/0xec0 [ 31.028831] vma_prepare+0xc54/0x11a0 [ 31.029194] __split_vma+0x5af/0x950 [ 31.029551] ? __pfx___split_vma+0x10/0x10 [ 31.029951] ? find_held_lock+0x2c/0x110 [ 31.030362] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.030787] ? lock_is_held_type+0x9f/0x120 [ 31.031236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.031697] ? mtree_range_walk+0x632/0x900 [ 31.032118] ? mas_walk+0x5c7/0x7c0 [ 31.032477] do_vmi_munmap+0x1f1/0x2b0 [ 31.032859] mmap_region+0x1f9/0x2660 [ 31.033227] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.033617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.034158] ? __pfx_lock_acquire+0x10/0x10 [ 31.034559] ? __pfx_mmap_region+0x10/0x10 [ 31.034958] ? security_mmap_addr+0x7d/0xa0 [ 31.035364] ? get_unmapped_area+0x1f5/0x3f0 [ 31.035777] do_mmap+0x854/0xf00 [ 31.036119] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.036490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.036933] ksys_mmap_pgoff+0x3af/0x500 [ 31.037315] do_syscall_64+0x3f/0x90 [ 31.037680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038171] RIP: 0033:0x7f1493d2fd82 [ 31.038516] 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 [ 31.040141] RSP: 002b:00007fff2dd694f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.040823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1493d2fd82 [ 31.041456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1493169000 [ 31.042092] RBP: 00007f1493169000 R08: 0000000000000009 R09: 0000000000001000 [ 31.042728] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcfd532d90 [ 31.043361] R13: 00007fff2dd69510 R14: 00007fff2dd69540 R15: 00007fff2dd698a0 [ 31.044006] [ 31.044226] [ 31.044391] Allocated by task 213: [ 31.044726] kasan_save_stack+0x22/0x50 [ 31.045111] kasan_set_track+0x25/0x30 [ 31.045483] __kasan_slab_alloc+0x59/0x70 [ 31.045879] kmem_cache_alloc+0x16b/0x370 [ 31.046267] vm_area_dup+0x20/0x160 [ 31.046609] __split_vma+0x170/0x950 [ 31.046964] split_vma+0xc6/0x110 [ 31.047295] mprotect_fixup+0x8d2/0xb30 [ 31.047677] do_mprotect_pkey+0x87e/0xd40 [ 31.048071] __x64_sys_mprotect+0x78/0xc0 [ 31.048465] do_syscall_64+0x3f/0x90 [ 31.048832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049315] [ 31.049477] Freed by task 0: [ 31.049760] kasan_save_stack+0x22/0x50 [ 31.050139] kasan_set_track+0x25/0x30 [ 31.050513] kasan_save_free_info+0x2b/0x50 [ 31.050915] __kasan_slab_free+0x10a/0x190 [ 31.051320] kmem_cache_free+0x10d/0x4d0 [ 31.051707] rcu_core+0x8c8/0x2860 [ 31.052054] __do_softirq+0x1b7/0x7d4 [ 31.052516] [ 31.052746] Last potentially related work creation: [ 31.053315] kasan_save_stack+0x22/0x50 [ 31.053803] __kasan_record_aux_stack+0x8e/0xa0 [ 31.054358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.054983] remove_vma+0x139/0x170 [ 31.055420] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.055962] do_vmi_munmap+0x1f1/0x2b0 [ 31.056436] __vm_munmap+0x138/0x3a0 [ 31.056904] __x64_sys_munmap+0x59/0x80 [ 31.057388] do_syscall_64+0x3f/0x90 [ 31.057849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058479] [ 31.058688] The buggy address belongs to the object at ffff888019bd2d98 [ 31.058688] which belongs to the cache vm_area_struct of size 168 [ 31.060133] The buggy address is located 88 bytes inside of [ 31.060133] freed 168-byte region [ffff888019bd2d98, ffff888019bd2e40) [ 31.061517] [ 31.061724] The buggy address belongs to the physical page: [ 31.062364] page:00000000bca825ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bd2 [ 31.063426] memcg:ffff88800e5eb301 [ 31.063836] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.064462] page_type: 0xffffffff() [ 31.064918] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.065813] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5eb301 [ 31.066689] page dumped because: kasan: bad access detected [ 31.067330] [ 31.067537] Memory state around the buggy address: [ 31.068115] ffff888019bd2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.068963] ffff888019bd2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.069801] >ffff888019bd2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.070635] ^ [ 31.071438] ffff888019bd2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.072279] ffff888019bd2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.073145] ================================================================== [ 31.074244] Disabling lock debugging due to kernel taint [ 33.652089] BUG: Bad rss-counter state mm:00000000b536ba12 type:MM_FILEPAGES val:33 [ 33.653199] BUG: Bad rss-counter state mm:00000000b536ba12 type:MM_ANONPAGES val:22 [ 34.228100] BUG: Bad rss-counter state mm:0000000092a7b6a9 type:MM_FILEPAGES val:33 [ 34.229275] BUG: Bad rss-counter state mm:0000000092a7b6a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34529' (ECDSA) to the list of known hosts. 2023/06/21 07:11:43 fuzzer started 2023/06/21 07:11:44 dialing manager at localhost:36067 2023/06/21 07:11:44 checking machine... 2023/06/21 07:11:44 checking revisions... [ 34.879811] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:11:44 testing simple program... [ 34.930156] cgroup: Unknown subsys name 'net' [ 34.976727] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:11:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f6a025c8020 CR3=0000000008f20000 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=2033343a31313a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110032a1e8a RSP=ffff88801950f440 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000096100000961 R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d86f2 RFL=00000247 [---Z-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 00007f1f7111b900 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=00007f1f716d2618 CR3=000000001c6bc000 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=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