syzkaller login: [ 63.612645] BUG: Bad rss-counter state mm:000000006abb8dcc type:MM_FILEPAGES val:33 [ 63.613886] BUG: Bad rss-counter state mm:000000006abb8dcc type:MM_ANONPAGES val:22 [ 63.651734] ================================================================== [ 63.652836] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.653925] Read of size 8 at addr ffff88801660a140 by task sshd/219 [ 63.654820] [ 63.655156] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.656162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.657317] Call Trace: [ 63.657720] [ 63.658076] dump_stack_lvl+0x91/0xf0 [ 63.658628] print_report+0xcc/0x620 [ 63.659182] ? __virt_addr_valid+0x102/0x340 [ 63.659822] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.660567] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.661477] kasan_report+0xbe/0xf0 [ 63.662187] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.663060] vma_interval_tree_remove+0xc75/0xec0 [ 63.663887] vma_prepare+0xc54/0x11a0 [ 63.664509] __split_vma+0x5af/0x950 [ 63.665228] ? __pfx___split_vma+0x10/0x10 [ 63.665884] ? find_held_lock+0x2c/0x110 [ 63.666525] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.667217] ? lock_is_held_type+0x9f/0x120 [ 63.667873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.668614] ? mtree_range_walk+0x632/0x900 [ 63.669293] ? mas_walk+0x5c7/0x7c0 [ 63.669863] do_vmi_munmap+0x1f1/0x2b0 [ 63.670471] mmap_region+0x1f9/0x2660 [ 63.671060] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.671689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.672584] ? __pfx_lock_acquire+0x10/0x10 [ 63.673262] ? __pfx_mmap_region+0x10/0x10 [ 63.673847] ? security_mmap_addr+0x7d/0xa0 [ 63.674387] ? get_unmapped_area+0x1f5/0x3f0 [ 63.674939] do_mmap+0x854/0xf00 [ 63.675382] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.675879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.676447] ksys_mmap_pgoff+0x3af/0x500 [ 63.676958] do_syscall_64+0x3f/0x90 [ 63.677439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.678081] RIP: 0033:0x7f4c61036d82 [ 63.678539] 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 [ 63.680669] RSP: 002b:00007ffc2d89d508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.681575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c61036d82 [ 63.682426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c60470000 [ 63.683265] RBP: 00007f4c60470000 R08: 0000000000000009 R09: 0000000000001000 [ 63.684118] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563bfab94ec0 [ 63.684977] R13: 00007ffc2d89d520 R14: 00007ffc2d89d550 R15: 00007ffc2d89d8b0 [ 63.685837] [ 63.686129] [ 63.686343] Allocated by task 212: [ 63.686772] kasan_save_stack+0x22/0x50 [ 63.687275] kasan_set_track+0x25/0x30 [ 63.687774] __kasan_slab_alloc+0x59/0x70 [ 63.688298] kmem_cache_alloc+0x16b/0x370 [ 63.688821] vm_area_dup+0x20/0x160 [ 63.689288] __split_vma+0x170/0x950 [ 63.689759] split_vma+0xc6/0x110 [ 63.690201] mprotect_fixup+0x8d2/0xb30 [ 63.690699] do_mprotect_pkey+0x87e/0xd40 [ 63.691227] __x64_sys_mprotect+0x78/0xc0 [ 63.691747] do_syscall_64+0x3f/0x90 [ 63.692225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.692867] [ 63.693103] Freed by task 203: [ 63.693499] kasan_save_stack+0x22/0x50 [ 63.694000] kasan_set_track+0x25/0x30 [ 63.694498] kasan_save_free_info+0x2b/0x50 [ 63.695031] __kasan_slab_free+0x10a/0x190 [ 63.695566] kmem_cache_free+0x10d/0x4d0 [ 63.696081] rcu_core+0x8c8/0x2860 [ 63.696558] __do_softirq+0x1b7/0x7d4 [ 63.697076] [ 63.697291] Last potentially related work creation: [ 63.697878] kasan_save_stack+0x22/0x50 [ 63.698379] __kasan_record_aux_stack+0x8e/0xa0 [ 63.698951] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.699594] remove_vma+0x139/0x170 [ 63.700046] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.700608] do_vmi_munmap+0x1f1/0x2b0 [ 63.701112] __vm_munmap+0x138/0x3a0 [ 63.701587] __x64_sys_munmap+0x59/0x80 [ 63.702086] do_syscall_64+0x3f/0x90 [ 63.702561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.703204] [ 63.703418] The buggy address belongs to the object at ffff88801660a0e8 [ 63.703418] which belongs to the cache vm_area_struct of size 168 [ 63.704906] The buggy address is located 88 bytes inside of [ 63.704906] freed 168-byte region [ffff88801660a0e8, ffff88801660a190) [ 63.706322] [ 63.706541] The buggy address belongs to the physical page: [ 63.707197] page:000000002f2c4def refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1660a [ 63.708295] memcg:ffff88800eb7a101 [ 63.708720] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.709368] page_type: 0xffffffff() [ 63.709823] raw: 0100000000000200 ffff88800879fc80 ffffea0000373580 dead000000000002 [ 63.710743] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb7a101 [ 63.711646] page dumped because: kasan: bad access detected [ 63.712308] [ 63.712522] Memory state around the buggy address: [ 63.713122] ffff88801660a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.713983] ffff88801660a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 63.714853] >ffff88801660a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.715731] ^ [ 63.716391] ffff88801660a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 63.717269] ffff88801660a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 63.718124] ================================================================== [ 63.719130] Disabling lock debugging due to kernel taint [ 65.964230] BUG: Bad rss-counter state mm:00000000ff3d1bce type:MM_FILEPAGES val:33 [ 65.965298] BUG: Bad rss-counter state mm:00000000ff3d1bce type:MM_ANONPAGES val:22 [ 66.549476] BUG: Bad rss-counter state mm:000000004c5a3835 type:MM_FILEPAGES val:33 [ 66.550725] BUG: Bad rss-counter state mm:000000004c5a3835 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3777' (ECDSA) to the list of known hosts. 2023/06/19 14:12:59 fuzzer started 2023/06/19 14:13:00 dialing manager at localhost:44161 2023/06/19 14:13:00 checking machine... 2023/06/19 14:13:00 checking revisions... [ 67.071317] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:13:00 testing simple program... [ 67.115551] cgroup: Unknown subsys name 'net' [ 67.178430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:12:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff8880147ee000 RSP=ffff88800c50f828 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800e0c8dc0 R13=ffff8880147ee57c R14=ffff8880147ee579 R15=ffff8880147ee600 RIP=ffffffff814c07e4 RFL=00000282 [--S----] 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 00007f6e910a6900 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=00007f6e9165d618 CR3=000000001a538000 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=0000000075f571b2 RBX=00000000f7766031 RCX=ffff88806cf09b94 RDX=0000000000000007 RSI=000000000000000b RDI=0000000075f571b3 RBP=0000000000000000 RSP=ffff88806cf09b20 R8 =00000000ffffd6a4 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf09b88 R15=0000000000000007 RIP=ffffffff82270e97 RFL=00000282 [--S----] 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 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=00007f04e0e20890 CR3=000000000d818000 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=de231c747c1bcc97c24634b6ed757613 XMM02=2c67c8bc2e329bc3000000000011da48 XMM03=fb795ef6d65770560000000000124408 XMM04=65e8ce19f3d9508f00000000000ae988 XMM05=dfcdbad4f1609c370000000000133ca0 XMM06=806171799158d9670000000000133b28 XMM07=e042d86d42eb936e00000000001246e0 XMM08=0ca6898867d883e4000000000011daa8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000