syzkaller login: [ 34.248879] BUG: Bad rss-counter state mm:00000000e9af0ea5 type:MM_FILEPAGES val:33 [ 34.250089] BUG: Bad rss-counter state mm:00000000e9af0ea5 type:MM_ANONPAGES val:22 [ 34.293440] ================================================================== [ 34.294658] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.295893] Read of size 8 at addr ffff88800e97c5c8 by task sshd/220 [ 34.296872] [ 34.297149] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.298252] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.299493] Call Trace: [ 34.299911] [ 34.300274] dump_stack_lvl+0x91/0xf0 [ 34.300909] print_report+0xcc/0x620 [ 34.301539] ? __virt_addr_valid+0x102/0x340 [ 34.302240] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.303019] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.303857] kasan_report+0xbe/0xf0 [ 34.304348] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.304966] vma_interval_tree_remove+0xc75/0xec0 [ 34.305564] vma_prepare+0xc54/0x11a0 [ 34.306041] __split_vma+0x5af/0x950 [ 34.306546] ? __pfx___split_vma+0x10/0x10 [ 34.307072] ? find_held_lock+0x2c/0x110 [ 34.307586] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.308168] ? lock_is_held_type+0x9f/0x120 [ 34.308698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.309299] ? mtree_range_walk+0x632/0x900 [ 34.309846] ? mas_walk+0x5c7/0x7c0 [ 34.310316] do_vmi_munmap+0x1f1/0x2b0 [ 34.310800] mmap_region+0x1f9/0x2660 [ 34.311278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.311793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.312501] ? __pfx_lock_acquire+0x10/0x10 [ 34.313031] ? __pfx_mmap_region+0x10/0x10 [ 34.313560] ? security_mmap_addr+0x7d/0xa0 [ 34.314082] ? get_unmapped_area+0x1f5/0x3f0 [ 34.314627] do_mmap+0x854/0xf00 [ 34.315063] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.315557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.316120] ksys_mmap_pgoff+0x3af/0x500 [ 34.316620] do_syscall_64+0x3f/0x90 [ 34.317093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.317734] RIP: 0033:0x7f5f25c41d82 [ 34.318186] 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 [ 34.320299] RSP: 002b:00007ffd9b0d9948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.321188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f25c41d82 [ 34.322022] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f2507b000 [ 34.322861] RBP: 00007f5f2507b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.323706] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bd0ef5ec0 [ 34.324538] R13: 00007ffd9b0d9960 R14: 00007ffd9b0d9990 R15: 00007ffd9b0d9cf0 [ 34.325380] [ 34.325668] [ 34.325882] Allocated by task 213: [ 34.326307] kasan_save_stack+0x22/0x50 [ 34.326804] kasan_set_track+0x25/0x30 [ 34.327293] __kasan_slab_alloc+0x59/0x70 [ 34.327834] kmem_cache_alloc+0x16b/0x370 [ 34.328343] vm_area_dup+0x20/0x160 [ 34.328798] __split_vma+0x170/0x950 [ 34.329265] split_vma+0xc6/0x110 [ 34.329706] mprotect_fixup+0x8d2/0xb30 [ 34.330204] do_mprotect_pkey+0x87e/0xd40 [ 34.330717] __x64_sys_mprotect+0x78/0xc0 [ 34.331230] do_syscall_64+0x3f/0x90 [ 34.331711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.332350] [ 34.332565] Freed by task 213: [ 34.332957] kasan_save_stack+0x22/0x50 [ 34.333460] kasan_set_track+0x25/0x30 [ 34.333947] kasan_save_free_info+0x2b/0x50 [ 34.334475] __kasan_slab_free+0x10a/0x190 [ 34.334999] kmem_cache_free+0x10d/0x4d0 [ 34.335499] rcu_core+0x8c8/0x2860 [ 34.335954] __do_softirq+0x1b7/0x7d4 [ 34.336427] [ 34.336643] Last potentially related work creation: [ 34.337218] kasan_save_stack+0x22/0x50 [ 34.337715] __kasan_record_aux_stack+0x8e/0xa0 [ 34.338290] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.338927] remove_vma+0x139/0x170 [ 34.339376] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.339946] do_vmi_munmap+0x1f1/0x2b0 [ 34.340427] __vm_munmap+0x138/0x3a0 [ 34.340892] __x64_sys_munmap+0x59/0x80 [ 34.341384] do_syscall_64+0x3f/0x90 [ 34.341857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.342487] [ 34.342701] The buggy address belongs to the object at ffff88800e97c570 [ 34.342701] which belongs to the cache vm_area_struct of size 168 [ 34.344147] The buggy address is located 88 bytes inside of [ 34.344147] freed 168-byte region [ffff88800e97c570, ffff88800e97c618) [ 34.345523] [ 34.345737] The buggy address belongs to the physical page: [ 34.346387] page:00000000b53ae0cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe97c [ 34.347458] memcg:ffff88800ec42001 [ 34.347902] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.348538] page_type: 0xffffffff() [ 34.348980] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.349895] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec42001 [ 34.350788] page dumped because: kasan: bad access detected [ 34.351442] [ 34.351666] Memory state around the buggy address: [ 34.352245] ffff88800e97c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.353099] ffff88800e97c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.353940] >ffff88800e97c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.354775] ^ [ 34.355427] ffff88800e97c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.356287] ffff88800e97c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.357124] ================================================================== [ 34.358639] Disabling lock debugging due to kernel taint [ 36.251007] BUG: Bad rss-counter state mm:00000000340eb4c9 type:MM_FILEPAGES val:33 [ 36.252159] BUG: Bad rss-counter state mm:00000000340eb4c9 type:MM_ANONPAGES val:22 [ 36.639548] BUG: Bad rss-counter state mm:000000002d3a4d95 type:MM_FILEPAGES val:33 [ 36.640554] BUG: Bad rss-counter state mm:000000002d3a4d95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51060' (ECDSA) to the list of known hosts. 2023/06/20 06:18:13 fuzzer started 2023/06/20 06:18:14 dialing manager at localhost:44161 2023/06/20 06:18:14 checking machine... 2023/06/20 06:18:14 checking revisions... [ 37.359282] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:18:14 testing simple program... [ 37.412917] cgroup: Unknown subsys name 'net' [ 37.477503] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:18:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880068971f0 RCX=0000000000000001 RDX=1ffff11000d12e40 RSI=ffff8880068976a8 RDI=ffff888006897200 RBP=ffff8880068976a8 RSP=ffff888006897148 R8 =ffffffff863b6674 R9 =ffff888006897230 R10=0000000000038001 R11=000000000008b5c6 R12=0000000000000008 R13=ffff888006890000 R14=ffff8880068976b0 R15=ffff8880068971f0 RIP=ffffffff8113046e 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 00007fb8a3431900 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=00007fb8a39e8618 CR3=000000001ca88000 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=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=00007fbae5cf5000 CR3=000000000d644000 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=421b7834fe8c89a3ad477e350cbafa15 XMM02=ec2efd57dc4c00df000000000011d1e0 XMM03=2883849fb62201c9000000000011d2b0 XMM04=8810c12edf027b0e00000000000ae988 XMM05=19e9129bd510f2350000000000133ab8 XMM06=b6c6670661e8b2b50000000000132920 XMM07=e042d86d42eb936e00000000001241a0 XMM08=2883849fb62201c9000000000011d2b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000