syzkaller login: [ 32.491668] BUG: Bad rss-counter state mm:00000000e380d7a1 type:MM_FILEPAGES val:33 [ 32.492892] BUG: Bad rss-counter state mm:00000000e380d7a1 type:MM_ANONPAGES val:22 [ 32.642676] ================================================================== [ 32.643608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.644582] Read of size 8 at addr ffff88800c62e228 by task sshd/221 [ 32.645409] [ 32.645745] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.646613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.647622] Call Trace: [ 32.647967] [ 32.648252] dump_stack_lvl+0x91/0xf0 [ 32.648738] print_report+0xcc/0x620 [ 32.649234] ? __virt_addr_valid+0x102/0x340 [ 32.649825] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.650474] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.651087] kasan_report+0xbe/0xf0 [ 32.651578] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.652212] vma_interval_tree_remove+0xc75/0xec0 [ 32.652847] vma_prepare+0xc54/0x11a0 [ 32.653334] __split_vma+0x5af/0x950 [ 32.653826] ? __pfx___split_vma+0x10/0x10 [ 32.654353] ? find_held_lock+0x2c/0x110 [ 32.654881] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.655457] ? lock_is_held_type+0x9f/0x120 [ 32.655986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.656602] ? mtree_range_walk+0x632/0x900 [ 32.657194] ? mas_walk+0x5c7/0x7c0 [ 32.657704] do_vmi_munmap+0x1f1/0x2b0 [ 32.658252] mmap_region+0x1f9/0x2660 [ 32.658763] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.659292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.660030] ? __pfx_lock_acquire+0x10/0x10 [ 32.660583] ? __pfx_mmap_region+0x10/0x10 [ 32.661149] ? security_mmap_addr+0x7d/0xa0 [ 32.661695] ? get_unmapped_area+0x1f5/0x3f0 [ 32.662269] do_mmap+0x854/0xf00 [ 32.662728] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.663223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.663811] ksys_mmap_pgoff+0x3af/0x500 [ 32.664342] do_syscall_64+0x3f/0x90 [ 32.664825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.665477] RIP: 0033:0x7f0e7f2cbd82 [ 32.665930] 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 [ 32.668132] RSP: 002b:00007ffdc1348358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.669070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e7f2cbd82 [ 32.669927] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e7e705000 [ 32.670771] RBP: 00007f0e7e705000 R08: 0000000000000009 R09: 0000000000001000 [ 32.671616] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a7229eb20 [ 32.672499] R13: 00007ffdc1348370 R14: 00007ffdc13483a0 R15: 00007ffdc1348700 [ 32.673389] [ 32.673684] [ 32.673905] Allocated by task 214: [ 32.674336] kasan_save_stack+0x22/0x50 [ 32.674845] kasan_set_track+0x25/0x30 [ 32.675356] __kasan_slab_alloc+0x59/0x70 [ 32.675885] kmem_cache_alloc+0x16b/0x370 [ 32.676396] vm_area_dup+0x20/0x160 [ 32.676865] __split_vma+0x170/0x950 [ 32.677327] split_vma+0xc6/0x110 [ 32.677782] mprotect_fixup+0x8d2/0xb30 [ 32.678300] do_mprotect_pkey+0x87e/0xd40 [ 32.678838] __x64_sys_mprotect+0x78/0xc0 [ 32.679378] do_syscall_64+0x3f/0x90 [ 32.679874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.680553] [ 32.680782] Freed by task 214: [ 32.681193] kasan_save_stack+0x22/0x50 [ 32.681723] kasan_set_track+0x25/0x30 [ 32.682233] kasan_save_free_info+0x2b/0x50 [ 32.682804] __kasan_slab_free+0x10a/0x190 [ 32.683358] kmem_cache_free+0x10d/0x4d0 [ 32.683879] rcu_core+0x8c8/0x2860 [ 32.684330] __do_softirq+0x1b7/0x7d4 [ 32.684820] [ 32.685032] Last potentially related work creation: [ 32.685619] kasan_save_stack+0x22/0x50 [ 32.686122] __kasan_record_aux_stack+0x8e/0xa0 [ 32.686707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.687384] remove_vma+0x139/0x170 [ 32.687861] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.688426] do_vmi_munmap+0x1f1/0x2b0 [ 32.688932] __vm_munmap+0x138/0x3a0 [ 32.689415] __x64_sys_munmap+0x59/0x80 [ 32.689909] do_syscall_64+0x3f/0x90 [ 32.690387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.691023] [ 32.691240] Second to last potentially related work creation: [ 32.691913] kasan_save_stack+0x22/0x50 [ 32.692439] __kasan_record_aux_stack+0x8e/0xa0 [ 32.693046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.693693] remove_vma+0x139/0x170 [ 32.694152] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.694720] do_vmi_munmap+0x1f1/0x2b0 [ 32.695200] mmap_region+0x1f9/0x2660 [ 32.695669] do_mmap+0x854/0xf00 [ 32.696097] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.696578] ksys_mmap_pgoff+0x3af/0x500 [ 32.697095] do_syscall_64+0x3f/0x90 [ 32.697565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.698198] [ 32.698420] The buggy address belongs to the object at ffff88800c62e1d0 [ 32.698420] which belongs to the cache vm_area_struct of size 168 [ 32.699878] The buggy address is located 88 bytes inside of [ 32.699878] freed 168-byte region [ffff88800c62e1d0, ffff88800c62e278) [ 32.701281] [ 32.701495] The buggy address belongs to the physical page: [ 32.702139] page:0000000044462ad9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc62e [ 32.703220] memcg:ffff88800c515a01 [ 32.703644] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.704345] page_type: 0xffffffff() [ 32.704810] raw: 0100000000000200 ffff88800879fc80 ffffea0000369ec0 dead000000000005 [ 32.705719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c515a01 [ 32.706607] page dumped because: kasan: bad access detected [ 32.707255] [ 32.707468] Memory state around the buggy address: [ 32.708041] ffff88800c62e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.708896] ffff88800c62e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.709753] >ffff88800c62e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.710608] ^ [ 32.711166] ffff88800c62e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.712011] ffff88800c62e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.712872] ================================================================== [ 32.713838] Disabling lock debugging due to kernel taint [ 34.884342] BUG: Bad rss-counter state mm:00000000a6eff001 type:MM_FILEPAGES val:33 [ 34.885416] BUG: Bad rss-counter state mm:00000000a6eff001 type:MM_ANONPAGES val:22 [ 35.324186] BUG: Bad rss-counter state mm:00000000ffb309f1 type:MM_FILEPAGES val:33 [ 35.325792] BUG: Bad rss-counter state mm:00000000ffb309f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37307' (ECDSA) to the list of known hosts. 2023/06/19 22:12:56 fuzzer started 2023/06/19 22:12:57 dialing manager at localhost:44161 2023/06/19 22:12:57 checking machine... 2023/06/19 22:12:57 checking revisions... [ 36.034868] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:12:57 testing simple program... [ 36.071905] cgroup: Unknown subsys name 'net' [ 36.141463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11001ad2f87 RCX=ffff88800d697c58 RDX=0000000000000000 RSI=00007ffeae432e40 RDI=ffff88800d697e60 RBP=ffff88800d697e60 RSP=ffff88800d697bf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000004000 R11=0000000000000000 R12=00007ffeae432e40 R13=ffff88800d697e60 R14=0000000000000000 R15=ffff88800d697c58 RIP=ffffffff83642adc 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 00007f0acc726900 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=00007f0acbbada70 CR3=000000000d86a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=4bff40ddfbfd848900000000000ae988 XMM05=1d24c86da9e368400000000000136040 XMM06=c291bd5c70af25b90000000000134e30 XMM07=fb795ef6d65770560000000000124058 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00000000000000e8 RCX=0000000000000001 RDX=0000000000000cc0 RSI=ffffffff8366cd3c RDI=ffff888008fce000 RBP=ffff8880146ffb18 RSP=ffff8880146ffac8 R8 =ffff8880146ffae0 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008fce000 R13=ffff88800e3e2500 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8135b8e0 RFL=00000283 [--S---C] 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 00007fb0a82b3900 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=00007ffd4317e000 CR3=000000001bfe2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000