syzkaller login: [ 30.827826] BUG: Bad rss-counter state mm:00000000f90bf820 type:MM_FILEPAGES val:33 [ 30.829059] BUG: Bad rss-counter state mm:00000000f90bf820 type:MM_ANONPAGES val:22 [ 30.873903] ================================================================== [ 30.874943] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.875961] Read of size 8 at addr ffff88800e8bd880 by task sshd/219 [ 30.876791] [ 30.877031] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.877968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.879035] Call Trace: [ 30.879385] [ 30.879696] dump_stack_lvl+0x91/0xf0 [ 30.880231] print_report+0xcc/0x620 [ 30.880762] ? __virt_addr_valid+0x102/0x340 [ 30.881364] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.882036] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.882733] kasan_report+0xbe/0xf0 [ 30.883254] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.883932] vma_interval_tree_remove+0xc75/0xec0 [ 30.884590] vma_prepare+0xc54/0x11a0 [ 30.885112] __split_vma+0x5af/0x950 [ 30.885628] ? __pfx___split_vma+0x10/0x10 [ 30.886215] ? find_held_lock+0x2c/0x110 [ 30.886786] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.887405] ? lock_is_held_type+0x9f/0x120 [ 30.887991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.888654] ? mtree_range_walk+0x632/0x900 [ 30.889260] ? mas_walk+0x5c7/0x7c0 [ 30.889784] do_vmi_munmap+0x1f1/0x2b0 [ 30.890328] mmap_region+0x1f9/0x2660 [ 30.890859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.891416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.892191] ? __pfx_lock_acquire+0x10/0x10 [ 30.892771] ? __pfx_mmap_region+0x10/0x10 [ 30.893349] ? security_mmap_addr+0x7d/0xa0 [ 30.893926] ? get_unmapped_area+0x1f5/0x3f0 [ 30.894546] do_mmap+0x854/0xf00 [ 30.895026] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.895569] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.896179] ksys_mmap_pgoff+0x3af/0x500 [ 30.896731] do_syscall_64+0x3f/0x90 [ 30.897250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897950] RIP: 0033:0x7f1cb3ca4d82 [ 30.898455] 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 [ 30.900772] RSP: 002b:00007ffc07797b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.901750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1cb3ca4d82 [ 30.902687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1cb30de000 [ 30.903605] RBP: 00007f1cb30de000 R08: 0000000000000009 R09: 0000000000001000 [ 30.904514] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ede78b3ec0 [ 30.905426] R13: 00007ffc07797b60 R14: 00007ffc07797b90 R15: 00007ffc07797ef0 [ 30.906354] [ 30.906810] [ 30.907046] Allocated by task 212: [ 30.907525] kasan_save_stack+0x22/0x50 [ 30.908099] kasan_set_track+0x25/0x30 [ 30.908668] __kasan_slab_alloc+0x59/0x70 [ 30.909277] kmem_cache_alloc+0x16b/0x370 [ 30.909868] vm_area_dup+0x20/0x160 [ 30.910410] __split_vma+0x170/0x950 [ 30.910945] split_vma+0xc6/0x110 [ 30.911448] mprotect_fixup+0x8d2/0xb30 [ 30.912024] do_mprotect_pkey+0x87e/0xd40 [ 30.912628] __x64_sys_mprotect+0x78/0xc0 [ 30.913226] do_syscall_64+0x3f/0x90 [ 30.913773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914531] [ 30.914775] Freed by task 212: [ 30.915223] kasan_save_stack+0x22/0x50 [ 30.915809] kasan_set_track+0x25/0x30 [ 30.916371] kasan_save_free_info+0x2b/0x50 [ 30.916999] __kasan_slab_free+0x10a/0x190 [ 30.917624] kmem_cache_free+0x10d/0x4d0 [ 30.918218] rcu_core+0x8c8/0x2860 [ 30.918739] __do_softirq+0x1b7/0x7d4 [ 30.919296] [ 30.919544] Last potentially related work creation: [ 30.920228] kasan_save_stack+0x22/0x50 [ 30.920812] __kasan_record_aux_stack+0x8e/0xa0 [ 30.921472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.922210] remove_vma+0x139/0x170 [ 30.922740] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.923375] do_vmi_munmap+0x1f1/0x2b0 [ 30.923931] __vm_munmap+0x138/0x3a0 [ 30.924465] __x64_sys_munmap+0x59/0x80 [ 30.925027] do_syscall_64+0x3f/0x90 [ 30.925575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926316] [ 30.926568] The buggy address belongs to the object at ffff88800e8bd828 [ 30.926568] which belongs to the cache vm_area_struct of size 168 [ 30.928258] The buggy address is located 88 bytes inside of [ 30.928258] freed 168-byte region [ffff88800e8bd828, ffff88800e8bd8d0) [ 30.929874] [ 30.930116] The buggy address belongs to the physical page: [ 30.930892] page:00000000ee9159e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8bd [ 30.932147] memcg:ffff88800cbade01 [ 30.932642] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.933388] page_type: 0xffffffff() [ 30.933904] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.934972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbade01 [ 30.936004] page dumped because: kasan: bad access detected [ 30.936770] [ 30.937009] Memory state around the buggy address: [ 30.937679] ffff88800e8bd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.938675] ffff88800e8bd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.939643] >ffff88800e8bd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.940611] ^ [ 30.941076] ffff88800e8bd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.942043] ffff88800e8bd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.943010] ================================================================== [ 30.944538] Disabling lock debugging due to kernel taint [ 33.181913] BUG: Bad rss-counter state mm:000000001438e31e type:MM_FILEPAGES val:33 [ 33.183102] BUG: Bad rss-counter state mm:000000001438e31e type:MM_ANONPAGES val:22 [ 33.561642] BUG: Bad rss-counter state mm:000000003d78aa81 type:MM_FILEPAGES val:33 [ 33.562874] BUG: Bad rss-counter state mm:000000003d78aa81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62751' (ECDSA) to the list of known hosts. 2023/06/20 22:53:52 fuzzer started 2023/06/20 22:53:52 dialing manager at localhost:36067 2023/06/20 22:53:52 checking machine... 2023/06/20 22:53:52 checking revisions... [ 34.333448] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:53:52 testing simple program... [ 34.385886] cgroup: Unknown subsys name 'net' [ 34.440637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:53:52 Registers: info registers vcpu 0 RAX=1ffff110022f4d69 RBX=ffff8880117a6b18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880117a6b28 RBP=ffff8880117a28c0 RSP=ffff88806ce09da8 R8 =0000000000000001 R9 =ffffed100d9c13a9 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800ccb6780 R14=ffffffff811f7e84 R15=ffff88800cb62080 RIP=ffffffff818464b7 RFL=00000002 [-------] 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 00007ff516c4c900 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=00007f4e72f96650 CR3=000000000d552000 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=9a87f7c6d4cd4b8aee405ccb624233c7 XMM02=0000000000119d28d59e07bde36eea69 XMM03=0000000000119e50ec2efd57dc4c00df XMM04=6a0e7796a79c902d00000000000ae988 XMM05=7d59e2acc7dd071d0000000000132650 XMM06=806171799158d9670000000000131440 XMM07=fb795ef6d657705600000000001216f8 XMM08=2c67c8bc2e329bc30000000000119e50 XMM09=00000000000000000000000000000000 XMM10=00000000200000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f56a5161894 CR3=000000000dee2000 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=2031353a33353a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000