syzkaller login: [ 47.656423] BUG: Bad rss-counter state mm:000000001fe19a8d type:MM_FILEPAGES val:33 [ 47.657697] BUG: Bad rss-counter state mm:000000001fe19a8d type:MM_ANONPAGES val:22 [ 47.696497] ================================================================== [ 47.697433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.698482] Read of size 8 at addr ffff88800f3a6ed8 by task sshd/219 [ 47.699466] [ 47.699722] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.700718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.701743] Call Trace: [ 47.702089] [ 47.702387] dump_stack_lvl+0x91/0xf0 [ 47.702904] print_report+0xcc/0x620 [ 47.703416] ? __virt_addr_valid+0x102/0x340 [ 47.704001] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.704639] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.705285] kasan_report+0xbe/0xf0 [ 47.705799] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.706556] vma_interval_tree_remove+0xc75/0xec0 [ 47.707210] vma_prepare+0xc54/0x11a0 [ 47.707774] __split_vma+0x5af/0x950 [ 47.708308] ? __pfx___split_vma+0x10/0x10 [ 47.708945] ? find_held_lock+0x2c/0x110 [ 47.709579] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.710261] ? lock_is_held_type+0x9f/0x120 [ 47.710837] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.711561] ? mtree_range_walk+0x632/0x900 [ 47.712230] ? mas_walk+0x5c7/0x7c0 [ 47.712762] do_vmi_munmap+0x1f1/0x2b0 [ 47.713369] mmap_region+0x1f9/0x2660 [ 47.713938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.714489] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.715324] ? __pfx_lock_acquire+0x10/0x10 [ 47.715925] ? __pfx_mmap_region+0x10/0x10 [ 47.716534] ? security_mmap_addr+0x7d/0xa0 [ 47.717174] ? get_unmapped_area+0x1f5/0x3f0 [ 47.717878] do_mmap+0x854/0xf00 [ 47.718407] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.719002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.719571] ksys_mmap_pgoff+0x3af/0x500 [ 47.720105] do_syscall_64+0x3f/0x90 [ 47.720560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.721255] RIP: 0033:0x7f29a6177d82 [ 47.721773] 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 [ 47.724004] RSP: 002b:00007fffa19c9ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.724913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29a6177d82 [ 47.725797] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29a55b1000 [ 47.726693] RBP: 00007f29a55b1000 R08: 0000000000000009 R09: 0000000000001000 [ 47.727696] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e2e1856ec0 [ 47.728643] R13: 00007fffa19ca010 R14: 00007fffa19ca040 R15: 00007fffa19ca3a0 [ 47.729684] [ 47.729988] [ 47.730196] Allocated by task 212: [ 47.730703] kasan_save_stack+0x22/0x50 [ 47.731310] kasan_set_track+0x25/0x30 [ 47.731905] __kasan_slab_alloc+0x59/0x70 [ 47.732534] kmem_cache_alloc+0x16b/0x370 [ 47.733162] vm_area_dup+0x20/0x160 [ 47.733679] __split_vma+0x170/0x950 [ 47.734248] split_vma+0xc6/0x110 [ 47.734714] mprotect_fixup+0x8d2/0xb30 [ 47.735223] do_mprotect_pkey+0x87e/0xd40 [ 47.735748] __x64_sys_mprotect+0x78/0xc0 [ 47.736274] do_syscall_64+0x3f/0x90 [ 47.736746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.737414] [ 47.737630] Freed by task 212: [ 47.738039] kasan_save_stack+0x22/0x50 [ 47.738545] kasan_set_track+0x25/0x30 [ 47.739129] kasan_save_free_info+0x2b/0x50 [ 47.739722] __kasan_slab_free+0x10a/0x190 [ 47.740358] kmem_cache_free+0x10d/0x4d0 [ 47.740942] rcu_core+0x8c8/0x2860 [ 47.741454] __do_softirq+0x1b7/0x7d4 [ 47.742042] [ 47.742301] Last potentially related work creation: [ 47.743008] kasan_save_stack+0x22/0x50 [ 47.743586] __kasan_record_aux_stack+0x8e/0xa0 [ 47.744247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.744991] remove_vma+0x139/0x170 [ 47.745497] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.746151] do_vmi_munmap+0x1f1/0x2b0 [ 47.746735] __vm_munmap+0x138/0x3a0 [ 47.747299] __x64_sys_munmap+0x59/0x80 [ 47.747902] do_syscall_64+0x3f/0x90 [ 47.748409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.749082] [ 47.749300] The buggy address belongs to the object at ffff88800f3a6e80 [ 47.749300] which belongs to the cache vm_area_struct of size 168 [ 47.750811] The buggy address is located 88 bytes inside of [ 47.750811] freed 168-byte region [ffff88800f3a6e80, ffff88800f3a6f28) [ 47.752257] [ 47.752476] The buggy address belongs to the physical page: [ 47.753143] page:000000004f2bb00c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf3a6 [ 47.754248] memcg:ffff88801584a301 [ 47.754683] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.755334] page_type: 0xffffffff() [ 47.755799] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.756725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801584a301 [ 47.757629] page dumped because: kasan: bad access detected [ 47.758296] [ 47.758512] Memory state around the buggy address: [ 47.759093] ffff88800f3a6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.759944] ffff88800f3a6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 47.760811] >ffff88800f3a6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.761668] ^ [ 47.762418] ffff88800f3a6f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 47.763279] ffff88800f3a6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.764131] ================================================================== [ 47.765263] Disabling lock debugging due to kernel taint [ 50.578524] BUG: Bad rss-counter state mm:0000000091c7b3d0 type:MM_FILEPAGES val:33 [ 50.579788] BUG: Bad rss-counter state mm:0000000091c7b3d0 type:MM_ANONPAGES val:22 [ 50.986163] BUG: Bad rss-counter state mm:000000003beb0826 type:MM_FILEPAGES val:33 [ 50.987322] BUG: Bad rss-counter state mm:000000003beb0826 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4114' (ECDSA) to the list of known hosts. 2023/06/19 13:35:28 fuzzer started 2023/06/19 13:35:28 dialing manager at localhost:44161 2023/06/19 13:35:28 checking machine... 2023/06/19 13:35:28 checking revisions... [ 51.670712] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:35:28 testing simple program... [ 51.714093] cgroup: Unknown subsys name 'net' [ 51.756338] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:35:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f1df6e068c0 CR3=000000000de18000 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=2037323a35333a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a35333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000030 RCX=0000000000000000 RDX=ffff88800f7f3680 RSI=ffffffff8449f040 RDI=0000000000000006 RBP=ffff888016a27e08 RSP=ffff888016507cc0 R8 =0000000000000006 R9 =00007f740ca8f044 R10=00007f740ca31fff R11=0000000000000000 R12=0000000000000005 R13=0000000000000008 R14=00007f740ca8f044 R15=00007f740ca31fff RIP=ffffffff814c081b 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 00007f740bf3b900 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=00007f740ca8f044 CR3=000000001a3b8000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=127e1cbe37e9dbd4cda7f67891d1cd90 XMM05=00000000000000000000000000000000 XMM06=12731c633775733d736572206873733d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000