syzkaller login: [ 34.642467] BUG: Bad rss-counter state mm:0000000011277eab type:MM_FILEPAGES val:33 [ 34.643732] BUG: Bad rss-counter state mm:0000000011277eab type:MM_ANONPAGES val:22 [ 34.692274] ================================================================== [ 34.693255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.694446] Read of size 8 at addr ffff88800d55d968 by task sshd/220 [ 34.695244] [ 34.695465] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 34.696405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.697429] Call Trace: [ 34.697761] <TASK> [ 34.698057] dump_stack_lvl+0x91/0xf0 [ 34.698594] print_report+0xcc/0x620 [ 34.699097] ? __virt_addr_valid+0x102/0x340 [ 34.699664] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.700303] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.700943] kasan_report+0xbe/0xf0 [ 34.701444] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.702092] vma_interval_tree_remove+0xc75/0xec0 [ 34.702737] vma_prepare+0xc54/0x11a0 [ 34.703237] __split_vma+0x5af/0x950 [ 34.703731] ? __pfx___split_vma+0x10/0x10 [ 34.704280] ? find_held_lock+0x2c/0x110 [ 34.704830] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.705419] ? lock_is_held_type+0x9f/0x120 [ 34.705976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.706638] ? mtree_range_walk+0x632/0x900 [ 34.707212] ? mas_walk+0x5c7/0x7c0 [ 34.707715] do_vmi_munmap+0x1f1/0x2b0 [ 34.708248] mmap_region+0x1f9/0x2660 [ 34.708758] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.709288] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.710017] ? __pfx_lock_acquire+0x10/0x10 [ 34.710581] ? __pfx_mmap_region+0x10/0x10 [ 34.711123] ? security_mmap_addr+0x7d/0xa0 [ 34.711673] ? get_unmapped_area+0x1f5/0x3f0 [ 34.712240] do_mmap+0x854/0xf00 [ 34.712687] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.713194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.713772] ksys_mmap_pgoff+0x3af/0x500 [ 34.714307] do_syscall_64+0x3f/0x90 [ 34.714799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.715469] RIP: 0033:0x7faee9dcfd82 [ 34.715947] 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 [ 34.718188] RSP: 002b:00007ffccc9faf98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.719131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faee9dcfd82 [ 34.720014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faee9209000 [ 34.720911] RBP: 00007faee9209000 R08: 0000000000000009 R09: 0000000000001000 [ 34.721805] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8df95bf60 [ 34.722696] R13: 00007ffccc9fafb0 R14: 00007ffccc9fafe0 R15: 00007ffccc9fb340 [ 34.723602] </TASK> [ 34.723905] [ 34.724123] Allocated by task 213: [ 34.724568] kasan_save_stack+0x22/0x50 [ 34.725100] kasan_set_track+0x25/0x30 [ 34.725611] __kasan_slab_alloc+0x59/0x70 [ 34.726183] kmem_cache_alloc+0x16b/0x370 [ 34.726728] vm_area_dup+0x20/0x160 [ 34.727206] __split_vma+0x170/0x950 [ 34.727692] split_vma+0xc6/0x110 [ 34.728142] mprotect_fixup+0x8d2/0xb30 [ 34.728664] do_mprotect_pkey+0x87e/0xd40 [ 34.729207] __x64_sys_mprotect+0x78/0xc0 [ 34.729750] do_syscall_64+0x3f/0x90 [ 34.730265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.730940] [ 34.731163] Freed by task 202: [ 34.731573] kasan_save_stack+0x22/0x50 [ 34.732098] kasan_set_track+0x25/0x30 [ 34.732611] kasan_save_free_info+0x2b/0x50 [ 34.733166] __kasan_slab_free+0x10a/0x190 [ 34.733721] kmem_cache_free+0x10d/0x4d0 [ 34.734244] rcu_core+0x8c8/0x2860 [ 34.734689] __do_softirq+0x1b7/0x7d4 [ 34.735162] [ 34.735372] Last potentially related work creation: [ 34.735945] kasan_save_stack+0x22/0x50 [ 34.736438] __kasan_record_aux_stack+0x8e/0xa0 [ 34.737010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.737770] remove_vma+0x139/0x170 [ 34.738233] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.738782] do_vmi_munmap+0x1f1/0x2b0 [ 34.739261] __vm_munmap+0x138/0x3a0 [ 34.739729] __x64_sys_munmap+0x59/0x80 [ 34.740225] do_syscall_64+0x3f/0x90 [ 34.740698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.741335] [ 34.741552] The buggy address belongs to the object at ffff88800d55d910 [ 34.741552] which belongs to the cache vm_area_struct of size 168 [ 34.743021] The buggy address is located 88 bytes inside of [ 34.743021] freed 168-byte region [ffff88800d55d910, ffff88800d55d9b8) [ 34.744393] [ 34.744608] The buggy address belongs to the physical page: [ 34.745257] page:00000000da4e9b3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd55d [ 34.746340] memcg:ffff888016736401 [ 34.746759] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.747389] page_type: 0xffffffff() [ 34.747829] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 34.748731] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016736401 [ 34.749623] page dumped because: kasan: bad access detected [ 34.750286] [ 34.750498] Memory state around the buggy address: [ 34.751066] ffff88800d55d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.751906] ffff88800d55d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.752750] >ffff88800d55d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.753585] ^ [ 34.754373] ffff88800d55d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.755216] ffff88800d55da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.756050] ================================================================== [ 34.757018] Disabling lock debugging due to kernel taint [ 37.075969] BUG: Bad rss-counter state mm:00000000bdf6d5a6 type:MM_FILEPAGES val:33 [ 37.077667] BUG: Bad rss-counter state mm:00000000bdf6d5a6 type:MM_ANONPAGES val:22 [ 37.545060] BUG: Bad rss-counter state mm:0000000009a24398 type:MM_FILEPAGES val:33 [ 37.546556] BUG: Bad rss-counter state mm:0000000009a24398 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56049' (ECDSA) to the list of known hosts. 2023/06/21 00:09:48 fuzzer started 2023/06/21 00:09:48 dialing manager at localhost:36067 2023/06/21 00:09:48 checking machine... 2023/06/21 00:09:48 checking revisions... [ 38.346442] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:09:48 testing simple program... [ 38.393622] cgroup: Unknown subsys name 'net' [ 38.452830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:09:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff110028d6fac RCX=ffff8880146b7df0 RDX=00007f47bf7f1000 RSI=ffff88800f5f3fd8 RDI=ffff8880102a2500 RBP=ffff8880097d8570 RSP=ffff8880146b7d38 R8 =0000000000000007 R9 =0000000000000000 R10=000000000c9a5007 R11=0000000000000000 R12=ffff88800f5f3fd8 R13=ffffffff852c61f8 R14=000000000c9a5007 R15=000000000f5f3067 RIP=ffffffff8175cef4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f47c03a6900 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=00007f47bf7f1400 CR3=000000000c6f4000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fc1695182af9c68400000000000ae988 XMM05=6f68bfb60d43ff960000000000132838 XMM06=c291bd5c70af25b900000000001318d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888019be5908 RCX=0000000000000000 RDX=ffff888015ca3680 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff888019be5700 RSP=ffff88800ec5fca0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000001 R13=ffff888019a8b030 R14=ffff888019be5788 R15=0000000000000000 RIP=ffffffff814c0404 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 00007fb71be4f900 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=00007fb71c406618 CR3=000000000f57c000 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