syzkaller login: [ 38.741763] BUG: Bad rss-counter state mm:0000000023b14192 type:MM_FILEPAGES val:33 [ 38.743000] BUG: Bad rss-counter state mm:0000000023b14192 type:MM_ANONPAGES val:22 [ 38.852185] ================================================================== [ 38.853304] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.854607] Read of size 8 at addr ffff88800e5d0df0 by task sshd/218 [ 38.855427] [ 38.855664] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.856621] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.857658] Call Trace: [ 38.857995] [ 38.858300] dump_stack_lvl+0x91/0xf0 [ 38.858830] print_report+0xcc/0x620 [ 38.859343] ? __virt_addr_valid+0x102/0x340 [ 38.859960] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.860619] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.861274] kasan_report+0xbe/0xf0 [ 38.861791] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.862466] vma_interval_tree_remove+0xc75/0xec0 [ 38.863132] vma_prepare+0xc54/0x11a0 [ 38.863626] __split_vma+0x5af/0x950 [ 38.864152] ? __pfx___split_vma+0x10/0x10 [ 38.864716] ? find_held_lock+0x2c/0x110 [ 38.865276] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.865880] ? lock_is_held_type+0x9f/0x120 [ 38.866439] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.867082] ? mtree_range_walk+0x632/0x900 [ 38.867658] ? mas_walk+0x5c7/0x7c0 [ 38.868176] do_vmi_munmap+0x1f1/0x2b0 [ 38.868713] mmap_region+0x1f9/0x2660 [ 38.869222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.869778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.870522] ? __pfx_lock_acquire+0x10/0x10 [ 38.871099] ? __pfx_mmap_region+0x10/0x10 [ 38.871680] ? security_mmap_addr+0x7d/0xa0 [ 38.872237] ? get_unmapped_area+0x1f5/0x3f0 [ 38.872815] do_mmap+0x854/0xf00 [ 38.873285] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.873810] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.874405] ksys_mmap_pgoff+0x3af/0x500 [ 38.874950] do_syscall_64+0x3f/0x90 [ 38.875454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.876189] RIP: 0033:0x7fbd48f9dd82 [ 38.876687] 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 [ 38.878956] RSP: 002b:00007ffe20b45ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.879928] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd48f9dd82 [ 38.880839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd483d7000 [ 38.881764] RBP: 00007fbd483d7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.882687] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be6d2c0ec0 [ 38.883552] R13: 00007ffe20b45b00 R14: 00007ffe20b45b30 R15: 00007ffe20b45e90 [ 38.884483] [ 38.884792] [ 38.885023] Allocated by task 211: [ 38.885489] kasan_save_stack+0x22/0x50 [ 38.886033] kasan_set_track+0x25/0x30 [ 38.886560] __kasan_slab_alloc+0x59/0x70 [ 38.887118] kmem_cache_alloc+0x16b/0x370 [ 38.887659] vm_area_dup+0x20/0x160 [ 38.888177] __split_vma+0x170/0x950 [ 38.888678] split_vma+0xc6/0x110 [ 38.889163] mprotect_fixup+0x8d2/0xb30 [ 38.889701] do_mprotect_pkey+0x87e/0xd40 [ 38.890247] __x64_sys_mprotect+0x78/0xc0 [ 38.890801] do_syscall_64+0x3f/0x90 [ 38.891296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.892001] [ 38.892233] Freed by task 211: [ 38.892668] kasan_save_stack+0x22/0x50 [ 38.893214] kasan_set_track+0x25/0x30 [ 38.893763] kasan_save_free_info+0x2b/0x50 [ 38.894341] __kasan_slab_free+0x10a/0x190 [ 38.894918] kmem_cache_free+0x10d/0x4d0 [ 38.895537] rcu_core+0x8c8/0x2860 [ 38.896069] __do_softirq+0x1b7/0x7d4 [ 38.896607] [ 38.896852] Last potentially related work creation: [ 38.897515] kasan_save_stack+0x22/0x50 [ 38.898083] __kasan_record_aux_stack+0x8e/0xa0 [ 38.898725] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.899447] remove_vma+0x139/0x170 [ 38.899981] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.900613] do_vmi_munmap+0x1f1/0x2b0 [ 38.901174] __vm_munmap+0x138/0x3a0 [ 38.901705] __x64_sys_munmap+0x59/0x80 [ 38.902268] do_syscall_64+0x3f/0x90 [ 38.902806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903527] [ 38.903775] The buggy address belongs to the object at ffff88800e5d0d98 [ 38.903775] which belongs to the cache vm_area_struct of size 168 [ 38.905409] The buggy address is located 88 bytes inside of [ 38.905409] freed 168-byte region [ffff88800e5d0d98, ffff88800e5d0e40) [ 38.906966] [ 38.907207] The buggy address belongs to the physical page: [ 38.907955] page:00000000528abd7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5d0 [ 38.909202] memcg:ffff88800ec68601 [ 38.909681] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.910416] page_type: 0xffffffff() [ 38.910924] raw: 0100000000000200 ffff8880087a0c80 ffffea000031a080 dead000000000002 [ 38.911976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec68601 [ 38.912995] page dumped because: kasan: bad access detected [ 38.913743] [ 38.913986] Memory state around the buggy address: [ 38.914646] ffff88800e5d0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.915614] ffff88800e5d0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.916611] >ffff88800e5d0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.917579] ^ [ 38.918495] ffff88800e5d0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.919460] ffff88800e5d0e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.920441] ================================================================== [ 38.921475] Disabling lock debugging due to kernel taint [ 40.217687] BUG: Bad rss-counter state mm:000000008e4b471f type:MM_FILEPAGES val:33 [ 40.218890] BUG: Bad rss-counter state mm:000000008e4b471f type:MM_ANONPAGES val:22 [ 40.541753] BUG: Bad rss-counter state mm:0000000082336d50 type:MM_FILEPAGES val:33 [ 40.542936] BUG: Bad rss-counter state mm:0000000082336d50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28869' (ECDSA) to the list of known hosts. 2023/06/20 18:48:39 fuzzer started 2023/06/20 18:48:40 dialing manager at localhost:36067 2023/06/20 18:48:40 checking machine... 2023/06/20 18:48:40 checking revisions... [ 41.243220] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:48:40 testing simple program... [ 41.288558] cgroup: Unknown subsys name 'net' [ 41.324406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb026bf1270 CR3=000000000c644000 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=a60b4fa154cfff9be94c89d648ca8d04 XMM02=2c67c8bc2e329bc3000000000011b6a0 XMM03=fb795ef6d65770560000000000122040 XMM04=279a8918478f1f0100000000000ae988 XMM05=751b9502027dc0b90000000000131bf8 XMM06=5a415b02e4cb32b20000000000130dd0 XMM07=e042d86d42eb936e0000000000122318 XMM08=54040bfdd1e4df5f000000000011b700 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff888015d0f888 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800f731b40 R13=ffff88800f731af0 R14=ffffffff8367562f R15=0000000000000014 RIP=ffffffff815342e3 RFL=00000047 [---Z-PC] 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 00007ff1c7f4e900 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=00007ff1c8505618 CR3=000000001c978000 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