syzkaller login: [ 87.001671] BUG: Bad rss-counter state mm:00000000a90a0180 type:MM_FILEPAGES val:33 [ 87.002602] BUG: Bad rss-counter state mm:00000000a90a0180 type:MM_ANONPAGES val:22 [ 87.166959] ================================================================== [ 87.167813] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 87.168716] Read of size 8 at addr ffff88800fdeed08 by task sshd/221 [ 87.169455] [ 87.169661] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 87.170715] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 87.171623] Call Trace: [ 87.171925] [ 87.172194] dump_stack_lvl+0x91/0xf0 [ 87.172682] print_report+0xcc/0x620 [ 87.173140] ? __virt_addr_valid+0x102/0x340 [ 87.173658] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.174240] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.174814] kasan_report+0xbe/0xf0 [ 87.175264] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.175846] vma_interval_tree_remove+0xc75/0xec0 [ 87.176426] vma_prepare+0xc54/0x11a0 [ 87.176876] __split_vma+0x5af/0x950 [ 87.177322] ? __pfx___split_vma+0x10/0x10 [ 87.177818] ? find_held_lock+0x2c/0x110 [ 87.178309] do_vmi_align_munmap+0x2ba/0x11f0 [ 87.178842] ? lock_is_held_type+0x9f/0x120 [ 87.179350] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 87.179919] ? mtree_range_walk+0x632/0x900 [ 87.180446] ? mas_walk+0x5c7/0x7c0 [ 87.180897] do_vmi_munmap+0x1f1/0x2b0 [ 87.181358] mmap_region+0x1f9/0x2660 [ 87.181815] ? vm_mmap_pgoff+0x15c/0x3a0 [ 87.182300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 87.182975] ? __pfx_lock_acquire+0x10/0x10 [ 87.183478] ? __pfx_mmap_region+0x10/0x10 [ 87.183976] ? security_mmap_addr+0x7d/0xa0 [ 87.184485] ? get_unmapped_area+0x1f5/0x3f0 [ 87.185007] do_mmap+0x854/0xf00 [ 87.185422] vm_mmap_pgoff+0x1a6/0x3a0 [ 87.185887] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 87.186418] ksys_mmap_pgoff+0x3af/0x500 [ 87.186894] do_syscall_64+0x3f/0x90 [ 87.187342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.187949] RIP: 0033:0x7f943ce36d82 [ 87.188397] 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 [ 87.190384] RSP: 002b:00007ffc82d72d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 87.191231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f943ce36d82 [ 87.192027] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f943c270000 [ 87.192832] RBP: 00007f943c270000 R08: 0000000000000009 R09: 0000000000001000 [ 87.193625] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8bbb1cec0 [ 87.194416] R13: 00007ffc82d72d60 R14: 00007ffc82d72d90 R15: 00007ffc82d730f0 [ 87.195213] [ 87.195487] [ 87.195692] Allocated by task 214: [ 87.196099] kasan_save_stack+0x22/0x50 [ 87.196592] kasan_set_track+0x25/0x30 [ 87.197057] __kasan_slab_alloc+0x59/0x70 [ 87.197548] kmem_cache_alloc+0x16b/0x370 [ 87.198031] vm_area_dup+0x20/0x160 [ 87.198456] __split_vma+0x170/0x950 [ 87.198892] split_vma+0xc6/0x110 [ 87.199302] mprotect_fixup+0x8d2/0xb30 [ 87.199777] do_mprotect_pkey+0x87e/0xd40 [ 87.200271] __x64_sys_mprotect+0x78/0xc0 [ 87.200772] do_syscall_64+0x3f/0x90 [ 87.201219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.201823] [ 87.202026] Freed by task 214: [ 87.202392] kasan_save_stack+0x22/0x50 [ 87.202869] kasan_set_track+0x25/0x30 [ 87.203337] kasan_save_free_info+0x2b/0x50 [ 87.203838] __kasan_slab_free+0x10a/0x190 [ 87.204346] kmem_cache_free+0x10d/0x4d0 [ 87.204828] rcu_core+0x8c8/0x2860 [ 87.205247] __do_softirq+0x1b7/0x7d4 [ 87.205699] [ 87.205905] Last potentially related work creation: [ 87.206452] kasan_save_stack+0x22/0x50 [ 87.206924] __kasan_record_aux_stack+0x8e/0xa0 [ 87.207464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 87.208069] remove_vma+0x139/0x170 [ 87.208513] do_vmi_align_munmap+0xd4a/0x11f0 [ 87.209043] do_vmi_munmap+0x1f1/0x2b0 [ 87.209499] __vm_munmap+0x138/0x3a0 [ 87.209937] __x64_sys_munmap+0x59/0x80 [ 87.210410] do_syscall_64+0x3f/0x90 [ 87.210861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.211467] [ 87.211671] The buggy address belongs to the object at ffff88800fdeecb0 [ 87.211671] which belongs to the cache vm_area_struct of size 168 [ 87.213094] The buggy address is located 88 bytes inside of [ 87.213094] freed 168-byte region [ffff88800fdeecb0, ffff88800fdeed58) [ 87.214467] [ 87.214679] The buggy address belongs to the physical page: [ 87.215341] page:000000008305337f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdee [ 87.216418] memcg:ffff888016c1de01 [ 87.216834] flags: 0x100000000000200(slab|node=0|zone=1) [ 87.217477] page_type: 0xffffffff() [ 87.217924] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 87.218837] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c1de01 [ 87.219744] page dumped because: kasan: bad access detected [ 87.220410] [ 87.220617] Memory state around the buggy address: [ 87.221191] ffff88800fdeec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 87.222049] ffff88800fdeec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 87.222901] >ffff88800fdeed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 87.223746] ^ [ 87.224173] ffff88800fdeed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 87.225035] ffff88800fdeee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 87.225884] ================================================================== [ 87.226839] Disabling lock debugging due to kernel taint [ 89.219321] BUG: Bad rss-counter state mm:00000000ad9e8e50 type:MM_FILEPAGES val:33 [ 89.220316] BUG: Bad rss-counter state mm:00000000ad9e8e50 type:MM_ANONPAGES val:22 [ 89.792006] BUG: Bad rss-counter state mm:0000000033b5933e type:MM_FILEPAGES val:33 [ 89.793222] BUG: Bad rss-counter state mm:0000000033b5933e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14027' (ECDSA) to the list of known hosts. 2023/06/19 19:46:09 fuzzer started 2023/06/19 19:46:09 dialing manager at localhost:44161 2023/06/19 19:46:09 checking machine... 2023/06/19 19:46:09 checking revisions... [ 90.431527] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:46:09 testing simple program... [ 90.485413] cgroup: Unknown subsys name 'net' [ 90.529644] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:45:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014347e20 RCX=0000000000000000 RDX=ffff888014293680 RSI=ffffffff8449f9cb RDI=ffff888014347e20 RBP=ffff88801001081c RSP=ffff888014347d70 R8 =0000000000000007 R9 =0000000000001000 R10=ffff88801001081e R11=0000000000000000 R12=ffff888010010800 R13=ffffed1002868fcb R14=ffff88801001081c R15=ffff888014347e59 RIP=ffffffff8449ed36 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efd239a6900 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=00007efd22e14920 CR3=000000000c808000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e7e279b8f20102ed00000000000ae988 XMM05=027ff657ed7a2d5200000000001394c8 XMM06=e4cb8bb95a7664b60000000000138360 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888015bffe60 RCX=ffffffff836427d5 RDX=ffff8880192e8000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888015bffbf8 RSP=ffff888015bffba0 R8 =0000000000000005 R9 =0000000000000080 R10=000000000000000c R11=0000000000000000 R12=ffff888015bffcf8 R13=00007ffce188b934 R14=000000000000000c R15=ffff888015bffcd8 RIP=ffffffff814c07e0 RFL=00000283 [--S---C] 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 00007fe6e7ac7900 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=00007fe6e807e618 CR3=000000001695c000 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