syzkaller login: [ 38.761644] BUG: Bad rss-counter state mm:0000000084278f56 type:MM_FILEPAGES val:33 [ 38.763500] BUG: Bad rss-counter state mm:0000000084278f56 type:MM_ANONPAGES val:22 [ 38.934092] ================================================================== [ 38.935030] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.935971] Read of size 8 at addr ffff88800e982d08 by task sshd/219 [ 38.936812] [ 38.937029] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.937892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.938885] Call Trace: [ 38.939204] [ 38.939487] dump_stack_lvl+0x91/0xf0 [ 38.939977] print_report+0xcc/0x620 [ 38.940461] ? __virt_addr_valid+0x102/0x340 [ 38.941015] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.941631] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.942295] kasan_report+0xbe/0xf0 [ 38.942771] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.943392] vma_interval_tree_remove+0xc75/0xec0 [ 38.944000] vma_prepare+0xc54/0x11a0 [ 38.944478] __split_vma+0x5af/0x950 [ 38.944952] ? __pfx___split_vma+0x10/0x10 [ 38.945484] ? find_held_lock+0x2c/0x110 [ 38.946014] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.946580] ? lock_is_held_type+0x9f/0x120 [ 38.947121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.947722] ? mtree_range_walk+0x632/0x900 [ 38.948279] ? mas_walk+0x5c7/0x7c0 [ 38.948752] do_vmi_munmap+0x1f1/0x2b0 [ 38.949246] mmap_region+0x1f9/0x2660 [ 38.949728] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.950251] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.950969] ? __pfx_lock_acquire+0x10/0x10 [ 38.951505] ? __pfx_mmap_region+0x10/0x10 [ 38.952042] ? security_mmap_addr+0x7d/0xa0 [ 38.952570] ? get_unmapped_area+0x1f5/0x3f0 [ 38.953117] do_mmap+0x854/0xf00 [ 38.953560] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.954077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.954640] ksys_mmap_pgoff+0x3af/0x500 [ 38.955150] do_syscall_64+0x3f/0x90 [ 38.955628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956269] RIP: 0033:0x7f1775718d82 [ 38.956731] 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 [ 38.958872] RSP: 002b:00007ffd5d71ddd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.959777] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1775718d82 [ 38.960632] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1774b52000 [ 38.961477] RBP: 00007f1774b52000 R08: 0000000000000009 R09: 0000000000001000 [ 38.962334] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcf2539980 [ 38.963176] R13: 00007ffd5d71ddf0 R14: 00007ffd5d71de20 R15: 00007ffd5d71e180 [ 38.964032] [ 38.964321] [ 38.964536] Allocated by task 212: [ 38.964972] kasan_save_stack+0x22/0x50 [ 38.965480] kasan_set_track+0x25/0x30 [ 38.965970] __kasan_slab_alloc+0x59/0x70 [ 38.966516] kmem_cache_alloc+0x16b/0x370 [ 38.967028] vm_area_dup+0x20/0x160 [ 38.967485] __split_vma+0x170/0x950 [ 38.967950] split_vma+0xc6/0x110 [ 38.968395] mprotect_fixup+0x8d2/0xb30 [ 38.968895] do_mprotect_pkey+0x87e/0xd40 [ 38.969423] __x64_sys_mprotect+0x78/0xc0 [ 38.969945] do_syscall_64+0x3f/0x90 [ 38.970430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.971077] [ 38.971295] Freed by task 212: [ 38.971686] kasan_save_stack+0x22/0x50 [ 38.972185] kasan_set_track+0x25/0x30 [ 38.972675] kasan_save_free_info+0x2b/0x50 [ 38.973210] __kasan_slab_free+0x10a/0x190 [ 38.973745] kmem_cache_free+0x10d/0x4d0 [ 38.974259] rcu_core+0x8c8/0x2860 [ 38.974705] __do_softirq+0x1b7/0x7d4 [ 38.975192] [ 38.975406] Last potentially related work creation: [ 38.975992] kasan_save_stack+0x22/0x50 [ 38.976496] __kasan_record_aux_stack+0x8e/0xa0 [ 38.977069] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.977715] remove_vma+0x139/0x170 [ 38.978184] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.978741] do_vmi_munmap+0x1f1/0x2b0 [ 38.979229] __vm_munmap+0x138/0x3a0 [ 38.979698] __x64_sys_munmap+0x59/0x80 [ 38.980194] do_syscall_64+0x3f/0x90 [ 38.980671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.981318] [ 38.981534] Second to last potentially related work creation: [ 38.982227] kasan_save_stack+0x22/0x50 [ 38.982732] __kasan_record_aux_stack+0x8e/0xa0 [ 38.983304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.983949] remove_vma+0x139/0x170 [ 38.984403] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.984958] do_vmi_munmap+0x1f1/0x2b0 [ 38.985447] __vm_munmap+0x138/0x3a0 [ 38.985916] __x64_sys_munmap+0x59/0x80 [ 38.986432] do_syscall_64+0x3f/0x90 [ 38.986904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987547] [ 38.987762] The buggy address belongs to the object at ffff88800e982cb0 [ 38.987762] which belongs to the cache vm_area_struct of size 168 [ 38.989233] The buggy address is located 88 bytes inside of [ 38.989233] freed 168-byte region [ffff88800e982cb0, ffff88800e982d58) [ 38.990641] [ 38.990855] The buggy address belongs to the physical page: [ 38.991518] page:000000002ab98683 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe982 [ 38.992605] memcg:ffff88800e4bb201 [ 38.993032] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.993683] page_type: 0xffffffff() [ 38.994146] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385b80 dead000000000004 [ 38.995061] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4bb201 [ 38.995968] page dumped because: kasan: bad access detected [ 38.996634] [ 38.996850] Memory state around the buggy address: [ 38.997430] ffff88800e982c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.998305] ffff88800e982c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.999153] >ffff88800e982d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.000006] ^ [ 39.000452] ffff88800e982d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.001313] ffff88800e982e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.002163] ================================================================== [ 39.003142] Disabling lock debugging due to kernel taint [ 40.758208] BUG: Bad rss-counter state mm:00000000bec07cea type:MM_FILEPAGES val:33 [ 40.758932] BUG: Bad rss-counter state mm:00000000bec07cea type:MM_ANONPAGES val:22 [ 41.246319] BUG: Bad rss-counter state mm:0000000086c3db93 type:MM_FILEPAGES val:33 [ 41.247480] BUG: Bad rss-counter state mm:0000000086c3db93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29243' (ECDSA) to the list of known hosts. 2023/06/20 14:58:54 fuzzer started 2023/06/20 14:58:54 dialing manager at localhost:36067 2023/06/20 14:58:54 checking machine... 2023/06/20 14:58:54 checking revisions... [ 41.911433] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:58:55 testing simple program... [ 41.955994] cgroup: Unknown subsys name 'net' [ 42.045442] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:58:54 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=00007f9d921e1650 CR3=0000000015a28000 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=2034353a38353a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38353a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00007ffce7f47908 RDI=0000000000000000 RBP=00007ffce7f47940 RSP=00007ffce7f473f0 R8 =00000000ffffffff R9 =0000000000000005 R10=0000000000000000 R11=0000000000000000 R12=00007ffce7f47950 R13=000055933a987d57 R14=00007ffce7f47a90 R15=0000000000000075 RIP=00007f77bd54bab3 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f77bcd15900 00000000 00000000 GS =0000 0000000000000000 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=00007f77bc168450 CR3=000000000cb5c000 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=25252525252525252525252525252525 XMM01=0000000000000000ff00ff0000000000 XMM02=0000000000000000ff00000000000000 XMM03=00746f6f72207265737520726f662064 XMM04=299966b17ef3e32000000000000ae988 XMM05=5def619a701473420000000000133cb8 XMM06=60a8ca0f044fa71b00000000001326e8 XMM07=00000000000000000000000000000000 XMM08=676e6979727465520075253d4449555f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000