syzkaller login: [ 31.559880] BUG: Bad rss-counter state mm:000000008b3893d4 type:MM_FILEPAGES val:33 [ 31.560640] BUG: Bad rss-counter state mm:000000008b3893d4 type:MM_ANONPAGES val:22 [ 31.591047] ================================================================== [ 31.591741] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.592408] Read of size 8 at addr ffff8880181c6140 by task sshd/220 [ 31.592927] [ 31.593071] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.593618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.594278] Call Trace: [ 31.594487] [ 31.594670] dump_stack_lvl+0x91/0xf0 [ 31.594982] print_report+0xcc/0x620 [ 31.595295] ? __virt_addr_valid+0x102/0x340 [ 31.595647] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.596042] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.596427] kasan_report+0xbe/0xf0 [ 31.596732] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.597150] vma_interval_tree_remove+0xc75/0xec0 [ 31.597560] vma_prepare+0xc54/0x11a0 [ 31.597958] __split_vma+0x5af/0x950 [ 31.598284] ? __pfx___split_vma+0x10/0x10 [ 31.598635] ? find_held_lock+0x2c/0x110 [ 31.598998] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.599392] ? lock_is_held_type+0x9f/0x120 [ 31.599759] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.600161] ? mtree_range_walk+0x632/0x900 [ 31.600516] ? mas_walk+0x5c7/0x7c0 [ 31.600814] do_vmi_munmap+0x1f1/0x2b0 [ 31.601125] mmap_region+0x1f9/0x2660 [ 31.601435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.601801] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.602255] ? __pfx_lock_acquire+0x10/0x10 [ 31.602591] ? __pfx_mmap_region+0x10/0x10 [ 31.602925] ? security_mmap_addr+0x7d/0xa0 [ 31.603487] ? get_unmapped_area+0x1f5/0x3f0 [ 31.603834] do_mmap+0x854/0xf00 [ 31.604119] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.604433] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.604788] ksys_mmap_pgoff+0x3af/0x500 [ 31.605102] do_syscall_64+0x3f/0x90 [ 31.605418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.605861] RIP: 0033:0x7fe6c8debd82 [ 31.606147] 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 [ 31.607501] RSP: 002b:00007ffc5081c258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.608080] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6c8debd82 [ 31.608608] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6c8225000 [ 31.609191] RBP: 00007fe6c8225000 R08: 0000000000000009 R09: 0000000000001000 [ 31.609826] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f751a11ec0 [ 31.610395] R13: 00007ffc5081c270 R14: 00007ffc5081c2a0 R15: 00007ffc5081c600 [ 31.610953] [ 31.611153] [ 31.611295] Allocated by task 213: [ 31.611589] kasan_save_stack+0x22/0x50 [ 31.611942] kasan_set_track+0x25/0x30 [ 31.612270] __kasan_slab_alloc+0x59/0x70 [ 31.612604] kmem_cache_alloc+0x16b/0x370 [ 31.612927] vm_area_dup+0x20/0x160 [ 31.613213] __split_vma+0x170/0x950 [ 31.613517] split_vma+0xc6/0x110 [ 31.613831] mprotect_fixup+0x8d2/0xb30 [ 31.614154] do_mprotect_pkey+0x87e/0xd40 [ 31.614488] __x64_sys_mprotect+0x78/0xc0 [ 31.614811] do_syscall_64+0x3f/0x90 [ 31.615113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615513] [ 31.615651] Freed by task 213: [ 31.615895] kasan_save_stack+0x22/0x50 [ 31.616209] kasan_set_track+0x25/0x30 [ 31.616521] kasan_save_free_info+0x2b/0x50 [ 31.616850] __kasan_slab_free+0x10a/0x190 [ 31.617186] kmem_cache_free+0x10d/0x4d0 [ 31.617527] rcu_core+0x8c8/0x2860 [ 31.617869] __do_softirq+0x1b7/0x7d4 [ 31.618197] [ 31.618343] Last potentially related work creation: [ 31.618730] kasan_save_stack+0x22/0x50 [ 31.619064] __kasan_record_aux_stack+0x8e/0xa0 [ 31.619431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.619859] remove_vma+0x139/0x170 [ 31.620171] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.620537] do_vmi_munmap+0x1f1/0x2b0 [ 31.620851] __vm_munmap+0x138/0x3a0 [ 31.621140] __x64_sys_munmap+0x59/0x80 [ 31.621447] do_syscall_64+0x3f/0x90 [ 31.621802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.622207] [ 31.622344] The buggy address belongs to the object at ffff8880181c60e8 [ 31.622344] which belongs to the cache vm_area_struct of size 168 [ 31.623281] The buggy address is located 88 bytes inside of [ 31.623281] freed 168-byte region [ffff8880181c60e8, ffff8880181c6190) [ 31.624173] [ 31.624309] The buggy address belongs to the physical page: [ 31.624726] page:0000000032da0fc9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181c6 [ 31.625426] memcg:ffff88800e22d901 [ 31.625757] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.626177] page_type: 0xffffffff() [ 31.626461] raw: 0100000000000200 ffff88800879fc80 ffffea0000575cc0 dead000000000008 [ 31.627040] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e22d901 [ 31.627626] page dumped because: kasan: bad access detected [ 31.628069] [ 31.628218] Memory state around the buggy address: [ 31.628611] ffff8880181c6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.629185] ffff8880181c6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.629794] >ffff8880181c6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.630355] ^ [ 31.630786] ffff8880181c6180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.631337] ffff8880181c6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.631886] ================================================================== [ 31.632775] Disabling lock debugging due to kernel taint [ 33.494409] BUG: Bad rss-counter state mm:0000000066d70b5b type:MM_FILEPAGES val:33 [ 33.495073] BUG: Bad rss-counter state mm:0000000066d70b5b type:MM_ANONPAGES val:22 [ 33.919223] BUG: Bad rss-counter state mm:0000000046f16976 type:MM_FILEPAGES val:33 [ 33.919897] BUG: Bad rss-counter state mm:0000000046f16976 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7852' (ECDSA) to the list of known hosts. 2023/06/20 09:28:41 fuzzer started 2023/06/20 09:28:41 dialing manager at localhost:44161 2023/06/20 09:28:41 checking machine... 2023/06/20 09:28:41 checking revisions... [ 34.425856] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:28:41 testing simple program... [ 34.467289] cgroup: Unknown subsys name 'net' [ 34.501787] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:28:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdd55e4b38 CR3=0000000005482000 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=00007fec5d6dc5100000562ae1e4c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81390b1d RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11000d01f24 RSI=ffffffff81390b1d RDI=ffff88800680f990 RBP=ffff88800680f960 RSP=ffff88800680f8c0 R8 =0000000000000001 R9 =ffff88800680f908 R10=0000000000038001 R11=0000000000009789 R12=ffff88800680f990 R13=0000000000000000 R14=ffff8880159f0000 R15=ffff888019bbcc58 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007f34b5319900 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=00007f34b58d0618 CR3=000000000d990000 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=563412feff00545000000000000080fe 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