syzkaller login: [ 31.147044] BUG: Bad rss-counter state mm:0000000037ac717e type:MM_FILEPAGES val:33 [ 31.148053] BUG: Bad rss-counter state mm:0000000037ac717e type:MM_ANONPAGES val:22 [ 31.312307] ================================================================== [ 31.313263] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.314241] Read of size 8 at addr ffff888019731ed8 by task sshd/219 [ 31.315090] [ 31.315375] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.316257] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.317287] Call Trace: [ 31.317631] [ 31.317914] dump_stack_lvl+0x91/0xf0 [ 31.318407] print_report+0xcc/0x620 [ 31.318912] ? __virt_addr_valid+0x102/0x340 [ 31.319491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.320114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.320756] kasan_report+0xbe/0xf0 [ 31.321245] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321896] vma_interval_tree_remove+0xc75/0xec0 [ 31.322520] vma_prepare+0xc54/0x11a0 [ 31.322993] __split_vma+0x5af/0x950 [ 31.323469] ? __pfx___split_vma+0x10/0x10 [ 31.324002] ? find_held_lock+0x2c/0x110 [ 31.324542] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.325102] ? lock_is_held_type+0x9f/0x120 [ 31.325686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.326298] ? mtree_range_walk+0x632/0x900 [ 31.326863] ? mas_walk+0x5c7/0x7c0 [ 31.327338] do_vmi_munmap+0x1f1/0x2b0 [ 31.327854] mmap_region+0x1f9/0x2660 [ 31.328337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.328863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.329630] ? __pfx_lock_acquire+0x10/0x10 [ 31.330171] ? __pfx_mmap_region+0x10/0x10 [ 31.330716] ? security_mmap_addr+0x7d/0xa0 [ 31.331246] ? get_unmapped_area+0x1f5/0x3f0 [ 31.331812] do_mmap+0x854/0xf00 [ 31.332254] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.332772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.333342] ksys_mmap_pgoff+0x3af/0x500 [ 31.333877] do_syscall_64+0x3f/0x90 [ 31.334356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.335021] RIP: 0033:0x7fa9e121ed82 [ 31.335491] 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 [ 31.337732] RSP: 002b:00007fffded6fc58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.338671] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9e121ed82 [ 31.339559] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9e0658000 [ 31.340410] RBP: 00007fa9e0658000 R08: 0000000000000009 R09: 0000000000001000 [ 31.341304] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d17ef69d90 [ 31.342193] R13: 00007fffded6fc70 R14: 00007fffded6fca0 R15: 00007fffded70000 [ 31.343075] [ 31.343374] [ 31.343606] Allocated by task 212: [ 31.344051] kasan_save_stack+0x22/0x50 [ 31.344593] kasan_set_track+0x25/0x30 [ 31.345097] __kasan_slab_alloc+0x59/0x70 [ 31.345667] kmem_cache_alloc+0x16b/0x370 [ 31.346338] vm_area_dup+0x20/0x160 [ 31.346937] __split_vma+0x170/0x950 [ 31.347428] split_vma+0xc6/0x110 [ 31.347886] mprotect_fixup+0x8d2/0xb30 [ 31.348395] do_mprotect_pkey+0x87e/0xd40 [ 31.348946] __x64_sys_mprotect+0x78/0xc0 [ 31.349514] do_syscall_64+0x3f/0x90 [ 31.349993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350666] [ 31.350885] Freed by task 212: [ 31.351273] kasan_save_stack+0x22/0x50 [ 31.351808] kasan_set_track+0x25/0x30 [ 31.352304] kasan_save_free_info+0x2b/0x50 [ 31.352866] __kasan_slab_free+0x10a/0x190 [ 31.353419] kmem_cache_free+0x10d/0x4d0 [ 31.353943] rcu_core+0x8c8/0x2860 [ 31.354387] __do_softirq+0x1b7/0x7d4 [ 31.354902] [ 31.355123] Last potentially related work creation: [ 31.355730] kasan_save_stack+0x22/0x50 [ 31.356230] __kasan_record_aux_stack+0x8e/0xa0 [ 31.356814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.357482] remove_vma+0x139/0x170 [ 31.357935] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.358511] do_vmi_munmap+0x1f1/0x2b0 [ 31.359006] __vm_munmap+0x138/0x3a0 [ 31.359485] __x64_sys_munmap+0x59/0x80 [ 31.359980] do_syscall_64+0x3f/0x90 [ 31.360473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361147] [ 31.361365] The buggy address belongs to the object at ffff888019731e80 [ 31.361365] which belongs to the cache vm_area_struct of size 168 [ 31.362886] The buggy address is located 88 bytes inside of [ 31.362886] freed 168-byte region [ffff888019731e80, ffff888019731f28) [ 31.364288] [ 31.364523] The buggy address belongs to the physical page: [ 31.365202] page:00000000ebcd7188 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19731 [ 31.366298] memcg:ffff88801972d301 [ 31.366758] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.367408] page_type: 0xffffffff() [ 31.367886] raw: 0100000000000200 ffff8880087a0c80 ffffea000065cb80 0000000000000002 [ 31.368817] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801972d301 [ 31.369753] page dumped because: kasan: bad access detected [ 31.370413] [ 31.370660] Memory state around the buggy address: [ 31.371237] ffff888019731d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.372101] ffff888019731e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.372965] >ffff888019731e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.373860] ^ [ 31.374595] ffff888019731f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.375446] ffff888019731f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.376314] ================================================================== [ 31.377303] Disabling lock debugging due to kernel taint [ 33.294683] BUG: Bad rss-counter state mm:000000001115b9b9 type:MM_FILEPAGES val:33 [ 33.296118] BUG: Bad rss-counter state mm:000000001115b9b9 type:MM_ANONPAGES val:22 [ 33.741659] BUG: Bad rss-counter state mm:00000000d7654376 type:MM_FILEPAGES val:33 [ 33.742804] BUG: Bad rss-counter state mm:00000000d7654376 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13914' (ECDSA) to the list of known hosts. 2023/06/20 20:18:25 fuzzer started 2023/06/20 20:18:25 dialing manager at localhost:36067 2023/06/20 20:18:25 checking machine... 2023/06/20 20:18:25 checking revisions... [ 34.512351] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:18:25 testing simple program... [ 34.567454] cgroup: Unknown subsys name 'net' [ 34.625798] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:18:24 Registers: info registers vcpu 0 RAX=1ffffffff0bb7b03 RBX=ffffffff85dbd818 RCX=ffffffff813ad71f RDX=0000000000000010 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff8880146ff348 R8 =ffffffff860d8256 R9 =ffff8880146ff440 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd838 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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 00007f61358d7900 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=00007f6134cda950 CR3=000000000c50e000 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=2ab9c8bf301512a86648703a61ea324e XMM02=ec2efd57dc4c00df0000000000119bc8 XMM03=74c453d3fd497d330000000000119c98 XMM04=99180fec7efa72fe00000000000ae988 XMM05=887029529e1975440000000000132280 XMM06=806171799158d9670000000000131320 XMM07=fb795ef6d657705600000000001215b8 XMM08=2c67c8bc2e329bc30000000000119c38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008442280 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000049 RDI=ffff88800844229c RBP=ffff8880099676e8 RSP=ffff888009967670 R8 =ffffffff8366a4d9 R9 =0000000000000280 R10=0000000000001140 R11=00000000000b6a61 R12=ffff888008442280 R13=00000000000928c0 R14=ffffffff8366a4d9 R15=0000000000002000 RIP=ffffffff81810cee RFL=00000202 [-------] 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 00007f72ef9e5900 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=00007f72eff9c618 CR3=000000001ce38000 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