syzkaller login: [ 38.754054] BUG: Bad rss-counter state mm:00000000b6bc3db4 type:MM_FILEPAGES val:33 [ 38.755782] BUG: Bad rss-counter state mm:00000000b6bc3db4 type:MM_ANONPAGES val:22 [ 38.913031] ================================================================== [ 38.913944] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.914897] Read of size 8 at addr ffff88800f6873f8 by task sshd/219 [ 38.915679] [ 38.915897] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.916872] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.917867] Call Trace: [ 38.918184] [ 38.918470] dump_stack_lvl+0x91/0xf0 [ 38.918982] print_report+0xcc/0x620 [ 38.919470] ? __virt_addr_valid+0x102/0x340 [ 38.920020] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.920660] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.921294] kasan_report+0xbe/0xf0 [ 38.921786] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.922399] vma_interval_tree_remove+0xc75/0xec0 [ 38.923006] vma_prepare+0xc54/0x11a0 [ 38.923497] __split_vma+0x5af/0x950 [ 38.923970] ? __pfx___split_vma+0x10/0x10 [ 38.924525] ? find_held_lock+0x2c/0x110 [ 38.925057] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.925631] ? lock_is_held_type+0x9f/0x120 [ 38.926169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.926782] ? mtree_range_walk+0x632/0x900 [ 38.927353] ? mas_walk+0x5c7/0x7c0 [ 38.927839] do_vmi_munmap+0x1f1/0x2b0 [ 38.928340] mmap_region+0x1f9/0x2660 [ 38.928841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.929356] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.930088] ? __pfx_lock_acquire+0x10/0x10 [ 38.930626] ? __pfx_mmap_region+0x10/0x10 [ 38.931169] ? security_mmap_addr+0x7d/0xa0 [ 38.931710] ? get_unmapped_area+0x1f5/0x3f0 [ 38.932275] do_mmap+0x854/0xf00 [ 38.932726] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.933234] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.933797] ksys_mmap_pgoff+0x3af/0x500 [ 38.934304] do_syscall_64+0x3f/0x90 [ 38.934779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935429] RIP: 0033:0x7fc121a40d82 [ 38.935889] 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 [ 38.938041] RSP: 002b:00007fff9f72bd48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.938965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc121a40d82 [ 38.939830] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc120e7a000 [ 38.940712] RBP: 00007fc120e7a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.941582] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d64174f70 [ 38.942452] R13: 00007fff9f72bd60 R14: 00007fff9f72bd90 R15: 00007fff9f72c0f0 [ 38.943332] [ 38.943633] [ 38.943854] Allocated by task 212: [ 38.944292] kasan_save_stack+0x22/0x50 [ 38.944821] kasan_set_track+0x25/0x30 [ 38.945324] __kasan_slab_alloc+0x59/0x70 [ 38.945857] kmem_cache_alloc+0x16b/0x370 [ 38.946376] vm_area_dup+0x20/0x160 [ 38.946842] __split_vma+0x170/0x950 [ 38.947328] split_vma+0xc6/0x110 [ 38.947778] mprotect_fixup+0x8d2/0xb30 [ 38.948285] do_mprotect_pkey+0x87e/0xd40 [ 38.948816] __x64_sys_mprotect+0x78/0xc0 [ 38.949343] do_syscall_64+0x3f/0x90 [ 38.949826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.950482] [ 38.950700] Freed by task 212: [ 38.951102] kasan_save_stack+0x22/0x50 [ 38.951606] kasan_set_track+0x25/0x30 [ 38.952110] kasan_save_free_info+0x2b/0x50 [ 38.952668] __kasan_slab_free+0x10a/0x190 [ 38.953208] kmem_cache_free+0x10d/0x4d0 [ 38.953728] rcu_core+0x8c8/0x2860 [ 38.954177] __do_softirq+0x1b7/0x7d4 [ 38.954671] [ 38.954893] Last potentially related work creation: [ 38.955480] kasan_save_stack+0x22/0x50 [ 38.955985] __kasan_record_aux_stack+0x8e/0xa0 [ 38.956578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.957224] remove_vma+0x139/0x170 [ 38.957677] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.958254] do_vmi_munmap+0x1f1/0x2b0 [ 38.958751] __vm_munmap+0x138/0x3a0 [ 38.959228] __x64_sys_munmap+0x59/0x80 [ 38.959731] do_syscall_64+0x3f/0x90 [ 38.960220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.960881] [ 38.961105] The buggy address belongs to the object at ffff88800f6873a0 [ 38.961105] which belongs to the cache vm_area_struct of size 168 [ 38.962594] The buggy address is located 88 bytes inside of [ 38.962594] freed 168-byte region [ffff88800f6873a0, ffff88800f687448) [ 38.964011] [ 38.964230] The buggy address belongs to the physical page: [ 38.964911] page:00000000115f5831 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf687 [ 38.965995] memcg:ffff88800c73fe01 [ 38.966424] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.967122] page_type: 0xffffffff() [ 38.967578] raw: 0100000000000200 ffff8880087a0c80 ffffea000036a480 dead000000000005 [ 38.968520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c73fe01 [ 38.969436] page dumped because: kasan: bad access detected [ 38.970105] [ 38.970321] Memory state around the buggy address: [ 38.970908] ffff88800f687280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.971774] ffff88800f687300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.972653] >ffff88800f687380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.973494] ^ [ 38.974340] ffff88800f687400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.975206] ffff88800f687480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.976061] ================================================================== [ 38.977036] Disabling lock debugging due to kernel taint [ 41.236961] BUG: Bad rss-counter state mm:00000000e40705aa type:MM_FILEPAGES val:33 [ 41.238031] BUG: Bad rss-counter state mm:00000000e40705aa type:MM_ANONPAGES val:22 [ 41.717984] BUG: Bad rss-counter state mm:00000000ce5e12ec type:MM_FILEPAGES val:33 [ 41.719638] BUG: Bad rss-counter state mm:00000000ce5e12ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48871' (ECDSA) to the list of known hosts. 2023/06/20 18:56:36 fuzzer started 2023/06/20 18:56:36 dialing manager at localhost:36067 2023/06/20 18:56:36 checking machine... 2023/06/20 18:56:36 checking revisions... [ 42.478866] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:56:36 testing simple program... [ 42.522394] cgroup: Unknown subsys name 'net' [ 42.577611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:56:36 Registers: info registers vcpu 0 RAX=ffffffff8613f6a3 RBX=0000000000000001 RCX=ffffffff8613f6a2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800d97f4c0 RSP=ffff88800d97f3f8 R8 =ffffffff8613f6a6 R9 =ffff88800d97f4a8 R10=0000000000038001 R11=0000000000021ee8 R12=ffff88800d97f4c8 R13=ffff88800d97f4b0 R14=ffff88800d97f848 R15=ffff88800d97f468 RIP=ffffffff81130b99 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 00007fc658e08900 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=00007fc65821b8a0 CR3=000000000cb10000 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=4a2708fd143c166000000000000ae988 XMM05=b64ccd03b49b9a440000000000133a18 XMM06=4fda316b135da52b0000000000132140 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008cdc500 RCX=ffffffff83aac829 RDX=ffff88800d661b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801a1d804c RSP=ffff888019eb73c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000006a0000006a0 R12=ffff88800ea13b40 R13=0000000000015176 R14=0000000000015176 R15=0000000000000000 RIP=ffffffff814c0864 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 00007fe5ffa51900 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=00007fe600008618 CR3=000000001996e000 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=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