syzkaller login: [ 36.295810] BUG: Bad rss-counter state mm:000000006b3c05d2 type:MM_FILEPAGES val:33 [ 36.296530] BUG: Bad rss-counter state mm:000000006b3c05d2 type:MM_ANONPAGES val:22 [ 36.481574] ================================================================== [ 36.482192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.482788] Read of size 8 at addr ffff88800dca3a50 by task sshd/229 [ 36.483324] [ 36.483467] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.484013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.488683] Call Trace: [ 36.488890] [ 36.489076] dump_stack_lvl+0x91/0xf0 [ 36.489399] print_report+0xcc/0x620 [ 36.489754] ? __virt_addr_valid+0x102/0x340 [ 36.490153] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.508546] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.508955] kasan_report+0xbe/0xf0 [ 36.509275] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.509679] vma_interval_tree_remove+0xc75/0xec0 [ 36.510073] vma_prepare+0xc54/0x11a0 [ 36.510390] __split_vma+0x5af/0x950 [ 36.510700] ? __pfx___split_vma+0x10/0x10 [ 36.511043] ? find_held_lock+0x2c/0x110 [ 36.511389] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.511751] ? lock_is_held_type+0x9f/0x120 [ 36.512098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.512521] ? mtree_range_walk+0x632/0x900 [ 36.512883] ? mas_walk+0x5c7/0x7c0 [ 36.513195] do_vmi_munmap+0x1f1/0x2b0 [ 36.513522] mmap_region+0x1f9/0x2660 [ 36.513844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.514190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.514661] ? __pfx_lock_acquire+0x10/0x10 [ 36.515016] ? __pfx_mmap_region+0x10/0x10 [ 36.515375] ? security_mmap_addr+0x7d/0xa0 [ 36.515733] ? get_unmapped_area+0x1f5/0x3f0 [ 36.516099] do_mmap+0x854/0xf00 [ 36.516411] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.516753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.517131] ksys_mmap_pgoff+0x3af/0x500 [ 36.517470] do_syscall_64+0x3f/0x90 [ 36.517785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.518213] RIP: 0033:0x7f59f10d5d82 [ 36.518528] 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 [ 36.519903] RSP: 002b:00007fff71e5a1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.520537] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59f10d5d82 [ 36.521090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59f050f000 [ 36.521652] RBP: 00007f59f050f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.522208] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfc8f1ff70 [ 36.522760] R13: 00007fff71e5a210 R14: 00007fff71e5a240 R15: 00007fff71e5a5a0 [ 36.523324] [ 36.523519] [ 36.523662] Allocated by task 222: [ 36.523945] kasan_save_stack+0x22/0x50 [ 36.524284] kasan_set_track+0x25/0x30 [ 36.524767] __kasan_slab_alloc+0x59/0x70 [ 36.525114] kmem_cache_alloc+0x16b/0x370 [ 36.525450] vm_area_dup+0x20/0x160 [ 36.525747] __split_vma+0x170/0x950 [ 36.526052] split_vma+0xc6/0x110 [ 36.526340] mprotect_fixup+0x8d2/0xb30 [ 36.526662] do_mprotect_pkey+0x87e/0xd40 [ 36.527000] __x64_sys_mprotect+0x78/0xc0 [ 36.527349] do_syscall_64+0x3f/0x90 [ 36.527660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.528077] [ 36.528220] Freed by task 222: [ 36.528503] kasan_save_stack+0x22/0x50 [ 36.528834] kasan_set_track+0x25/0x30 [ 36.529156] kasan_save_free_info+0x2b/0x50 [ 36.529502] __kasan_slab_free+0x10a/0x190 [ 36.529846] kmem_cache_free+0x10d/0x4d0 [ 36.530171] rcu_core+0x8c8/0x2860 [ 36.530468] __do_softirq+0x1b7/0x7d4 [ 36.530783] [ 36.530926] Last potentially related work creation: [ 36.531303] kasan_save_stack+0x22/0x50 [ 36.531633] __kasan_record_aux_stack+0x8e/0xa0 [ 36.532004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.532451] remove_vma+0x139/0x170 [ 36.532751] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.533113] do_vmi_munmap+0x1f1/0x2b0 [ 36.533436] __vm_munmap+0x138/0x3a0 [ 36.533738] __x64_sys_munmap+0x59/0x80 [ 36.534062] do_syscall_64+0x3f/0x90 [ 36.534368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.534782] [ 36.534923] The buggy address belongs to the object at ffff88800dca39f8 [ 36.534923] which belongs to the cache vm_area_struct of size 168 [ 36.535857] The buggy address is located 88 bytes inside of [ 36.535857] freed 168-byte region [ffff88800dca39f8, ffff88800dca3aa0) [ 36.536784] [ 36.536928] The buggy address belongs to the physical page: [ 36.537346] page:000000000e0ebb93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdca3 [ 36.538037] memcg:ffff88800e02e701 [ 36.538314] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.538727] page_type: 0xffffffff() [ 36.539020] raw: 0100000000000200 ffff88800879fc80 ffffea000036ee40 dead000000000004 [ 36.539613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e02e701 [ 36.540193] page dumped because: kasan: bad access detected [ 36.544991] [ 36.545136] Memory state around the buggy address: [ 36.545522] ffff88800dca3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.546083] ffff88800dca3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.546646] >ffff88800dca3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.547189] ^ [ 36.547627] ffff88800dca3a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.548164] ffff88800dca3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.548732] ================================================================== [ 36.556644] Disabling lock debugging due to kernel taint [ 39.291065] BUG: Bad rss-counter state mm:000000004c57d1a5 type:MM_FILEPAGES val:33 [ 39.291704] BUG: Bad rss-counter state mm:000000004c57d1a5 type:MM_ANONPAGES val:22 [ 39.695002] BUG: Bad rss-counter state mm:000000008c9c8008 type:MM_FILEPAGES val:33 [ 39.695632] BUG: Bad rss-counter state mm:000000008c9c8008 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49767' (ECDSA) to the list of known hosts. 2023/06/20 10:16:36 fuzzer started 2023/06/20 10:16:37 dialing manager at localhost:44161 2023/06/20 10:16:37 checking machine... 2023/06/20 10:16:37 checking revisions... [ 40.589971] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:16:37 testing simple program... [ 40.651489] cgroup: Unknown subsys name 'net' [ 40.718897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:16:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffc9000001e260 RCX=ffffffff816bbc48 RDX=ffff888016a451c0 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000127 RSP=ffff88800fd978c0 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000005 R13=0000000000000000 R14=0000000000000126 R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000046 [---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 00007f233d532900 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=00007f233d5326f8 CR3=000000000eaa2000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f9a43312020 CR3=0000000009702000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=a15b1e6eab9b4d460000000000135f28 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=a36efa35a101bf2d00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000