syzkaller login: [ 39.091723] BUG: Bad rss-counter state mm:00000000a445cca5 type:MM_FILEPAGES val:33 [ 39.092920] BUG: Bad rss-counter state mm:00000000a445cca5 type:MM_ANONPAGES val:22 [ 39.207215] ================================================================== [ 39.208637] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.209609] Read of size 8 at addr ffff88800bbaadf0 by task sshd/224 [ 39.210381] [ 39.210625] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.211487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.212483] Call Trace: [ 39.212871] [ 39.213220] dump_stack_lvl+0x91/0xf0 [ 39.213817] print_report+0xcc/0x620 [ 39.214414] ? __virt_addr_valid+0x102/0x340 [ 39.215084] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.215838] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.216571] kasan_report+0xbe/0xf0 [ 39.217131] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.217867] vma_interval_tree_remove+0xc75/0xec0 [ 39.218580] vma_prepare+0xc54/0x11a0 [ 39.219149] __split_vma+0x5af/0x950 [ 39.219704] ? __pfx___split_vma+0x10/0x10 [ 39.220215] ? find_held_lock+0x2c/0x110 [ 39.220756] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.221324] ? lock_is_held_type+0x9f/0x120 [ 39.221890] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.222510] ? mtree_range_walk+0x632/0x900 [ 39.223063] ? mas_walk+0x5c7/0x7c0 [ 39.223549] do_vmi_munmap+0x1f1/0x2b0 [ 39.224065] mmap_region+0x1f9/0x2660 [ 39.224561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.225067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.225831] ? __pfx_lock_acquire+0x10/0x10 [ 39.226378] ? __pfx_mmap_region+0x10/0x10 [ 39.226908] ? security_mmap_addr+0x7d/0xa0 [ 39.227437] ? get_unmapped_area+0x1f5/0x3f0 [ 39.228031] do_mmap+0x854/0xf00 [ 39.228485] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.229068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.229763] ksys_mmap_pgoff+0x3af/0x500 [ 39.230375] do_syscall_64+0x3f/0x90 [ 39.230944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.231753] RIP: 0033:0x7f703e98dd82 [ 39.232299] 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 [ 39.234807] RSP: 002b:00007ffd896a6398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.235915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f703e98dd82 [ 39.236908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f703ddc7000 [ 39.237908] RBP: 00007f703ddc7000 R08: 0000000000000009 R09: 0000000000001000 [ 39.238927] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561504722ec0 [ 39.239939] R13: 00007ffd896a63b0 R14: 00007ffd896a63e0 R15: 00007ffd896a6740 [ 39.240911] [ 39.241196] [ 39.241429] Allocated by task 217: [ 39.241867] kasan_save_stack+0x22/0x50 [ 39.242385] kasan_set_track+0x25/0x30 [ 39.242899] __kasan_slab_alloc+0x59/0x70 [ 39.243433] kmem_cache_alloc+0x16b/0x370 [ 39.243980] vm_area_dup+0x20/0x160 [ 39.244447] __split_vma+0x170/0x950 [ 39.244921] split_vma+0xc6/0x110 [ 39.245366] mprotect_fixup+0x8d2/0xb30 [ 39.245873] do_mprotect_pkey+0x87e/0xd40 [ 39.246411] __x64_sys_mprotect+0x78/0xc0 [ 39.246948] do_syscall_64+0x3f/0x90 [ 39.247432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.248098] [ 39.248339] Freed by task 217: [ 39.248745] kasan_save_stack+0x22/0x50 [ 39.249251] kasan_set_track+0x25/0x30 [ 39.249763] kasan_save_free_info+0x2b/0x50 [ 39.250312] __kasan_slab_free+0x10a/0x190 [ 39.250856] kmem_cache_free+0x10d/0x4d0 [ 39.251368] rcu_core+0x8c8/0x2860 [ 39.251864] __do_softirq+0x1b7/0x7d4 [ 39.252392] [ 39.252632] Last potentially related work creation: [ 39.253190] kasan_save_stack+0x22/0x50 [ 39.253679] __kasan_record_aux_stack+0x8e/0xa0 [ 39.254231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.254859] remove_vma+0x139/0x170 [ 39.255285] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.255842] do_vmi_munmap+0x1f1/0x2b0 [ 39.256305] __vm_munmap+0x138/0x3a0 [ 39.256770] __x64_sys_munmap+0x59/0x80 [ 39.257319] do_syscall_64+0x3f/0x90 [ 39.257905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.258616] [ 39.258855] The buggy address belongs to the object at ffff88800bbaad98 [ 39.258855] which belongs to the cache vm_area_struct of size 168 [ 39.260500] The buggy address is located 88 bytes inside of [ 39.260500] freed 168-byte region [ffff88800bbaad98, ffff88800bbaae40) [ 39.262034] [ 39.262271] The buggy address belongs to the physical page: [ 39.263000] page:00000000d8b60825 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbbaa [ 39.264598] memcg:ffff888015a81f01 [ 39.265364] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.266404] page_type: 0xffffffff() [ 39.267093] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.268562] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a81f01 [ 39.269933] page dumped because: kasan: bad access detected [ 39.270917] [ 39.271197] Memory state around the buggy address: [ 39.271894] ffff88800bbaac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.272744] ffff88800bbaad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.273631] >ffff88800bbaad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.274685] ^ [ 39.275770] ffff88800bbaae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.276819] ffff88800bbaae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.277856] ================================================================== [ 39.279228] Disabling lock debugging due to kernel taint [ 41.389536] BUG: Bad rss-counter state mm:00000000a8f1f5a5 type:MM_FILEPAGES val:33 [ 41.390456] BUG: Bad rss-counter state mm:00000000a8f1f5a5 type:MM_ANONPAGES val:22 [ 41.878672] BUG: Bad rss-counter state mm:0000000037e3f5a7 type:MM_FILEPAGES val:33 [ 41.880011] BUG: Bad rss-counter state mm:0000000037e3f5a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59633' (ECDSA) to the list of known hosts. 2023/06/20 00:05:09 fuzzer started 2023/06/20 00:05:09 dialing manager at localhost:44161 2023/06/20 00:05:09 checking machine... 2023/06/20 00:05:09 checking revisions... [ 42.626690] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:05:09 testing simple program... [ 42.668835] cgroup: Unknown subsys name 'net' [ 42.725122] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:05:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888012b5ff28 RCX=0000000000000000 RDX=1ffff1100256bfe5 RSI=ffffffff81f4de63 RDI=ffff88800c375118 RBP=ffff888016e4fc38 RSP=ffff888016e4fa58 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000006 R11=0000000000000000 R12=ffff88800c375008 R13=ffff888016e4fc3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f4deaa RFL=00000246 [---Z-P-] 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 00007f59f90ef900 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=00007ffdefe50000 CR3=00000000193ca000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f920ddf5fc8 CR3=000000000d60c000 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=eb6b4450cfb02b974f4221f62e63cd7b XMM02=2c67c8bc2e329bc3000000000011d178 XMM03=fb795ef6d65770560000000000123b18 XMM04=233fc052a9c7993e00000000000ae988 XMM05=83594ee05b8d389500000000001333f8 XMM06=e2afe53f02670eba00000000001325d0 XMM07=e042d86d42eb936e0000000000123d98 XMM08=6a1e8bba60bb1b3f000000000011d1d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000