syzkaller login: [ 31.211625] BUG: Bad rss-counter state mm:00000000f470fdf5 type:MM_FILEPAGES val:33 [ 31.213492] BUG: Bad rss-counter state mm:00000000f470fdf5 type:MM_ANONPAGES val:22 [ 31.390629] ================================================================== [ 31.391724] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.392940] Read of size 8 at addr ffff88800ed9fa50 by task sshd/221 [ 31.393895] [ 31.394156] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.395184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.396332] Call Trace: [ 31.396709] [ 31.397073] dump_stack_lvl+0x91/0xf0 [ 31.397669] print_report+0xcc/0x620 [ 31.398248] ? __virt_addr_valid+0x102/0x340 [ 31.398913] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.399649] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.400411] kasan_report+0xbe/0xf0 [ 31.401019] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.401794] vma_interval_tree_remove+0xc75/0xec0 [ 31.402529] vma_prepare+0xc54/0x11a0 [ 31.403119] __split_vma+0x5af/0x950 [ 31.403690] ? __pfx___split_vma+0x10/0x10 [ 31.404339] ? find_held_lock+0x2c/0x110 [ 31.404994] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.405695] ? lock_is_held_type+0x9f/0x120 [ 31.406347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.407092] ? mtree_range_walk+0x632/0x900 [ 31.407764] ? mas_walk+0x5c7/0x7c0 [ 31.408338] do_vmi_munmap+0x1f1/0x2b0 [ 31.408968] mmap_region+0x1f9/0x2660 [ 31.409560] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.410286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.411398] ? __pfx_lock_acquire+0x10/0x10 [ 31.412236] ? __pfx_mmap_region+0x10/0x10 [ 31.413067] ? security_mmap_addr+0x7d/0xa0 [ 31.413940] ? get_unmapped_area+0x1f5/0x3f0 [ 31.414690] do_mmap+0x854/0xf00 [ 31.415320] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.415948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.416620] ksys_mmap_pgoff+0x3af/0x500 [ 31.417356] do_syscall_64+0x3f/0x90 [ 31.417964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418740] RIP: 0033:0x7f570b435d82 [ 31.419300] 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 [ 31.421885] RSP: 002b:00007ffdd7719d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.422966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f570b435d82 [ 31.423990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f570a86f000 [ 31.425024] RBP: 00007f570a86f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.426051] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626ba872ec0 [ 31.427049] R13: 00007ffdd7719d70 R14: 00007ffdd7719da0 R15: 00007ffdd771a100 [ 31.428072] [ 31.428414] [ 31.428662] Allocated by task 214: [ 31.429180] kasan_save_stack+0x22/0x50 [ 31.429795] kasan_set_track+0x25/0x30 [ 31.430375] __kasan_slab_alloc+0x59/0x70 [ 31.431012] kmem_cache_alloc+0x16b/0x370 [ 31.431609] vm_area_dup+0x20/0x160 [ 31.432174] __split_vma+0x170/0x950 [ 31.432712] split_vma+0xc6/0x110 [ 31.433232] mprotect_fixup+0x8d2/0xb30 [ 31.433866] do_mprotect_pkey+0x87e/0xd40 [ 31.434488] __x64_sys_mprotect+0x78/0xc0 [ 31.435136] do_syscall_64+0x3f/0x90 [ 31.435692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.436494] [ 31.436751] Freed by task 19: [ 31.437212] kasan_save_stack+0x22/0x50 [ 31.437828] kasan_set_track+0x25/0x30 [ 31.438488] kasan_save_free_info+0x2b/0x50 [ 31.439137] __kasan_slab_free+0x10a/0x190 [ 31.439768] kmem_cache_free+0x10d/0x4d0 [ 31.440371] rcu_core+0x8c8/0x2860 [ 31.440909] __do_softirq+0x1b7/0x7d4 [ 31.441464] [ 31.441749] Last potentially related work creation: [ 31.442445] kasan_save_stack+0x22/0x50 [ 31.443062] __kasan_record_aux_stack+0x8e/0xa0 [ 31.443734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.444503] remove_vma+0x139/0x170 [ 31.445052] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.445713] do_vmi_munmap+0x1f1/0x2b0 [ 31.446294] __vm_munmap+0x138/0x3a0 [ 31.446874] __x64_sys_munmap+0x59/0x80 [ 31.447452] do_syscall_64+0x3f/0x90 [ 31.448020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.448788] [ 31.449047] The buggy address belongs to the object at ffff88800ed9f9f8 [ 31.449047] which belongs to the cache vm_area_struct of size 168 [ 31.450791] The buggy address is located 88 bytes inside of [ 31.450791] freed 168-byte region [ffff88800ed9f9f8, ffff88800ed9faa0) [ 31.452456] [ 31.452707] The buggy address belongs to the physical page: [ 31.453489] page:00000000e29e8233 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed9f [ 31.454797] memcg:ffff88800c600001 [ 31.455291] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.456064] page_type: 0xffffffff() [ 31.456581] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.457678] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c600001 [ 31.458751] page dumped because: kasan: bad access detected [ 31.459529] [ 31.459790] Memory state around the buggy address: [ 31.460465] ffff88800ed9f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.461481] ffff88800ed9f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.462499] >ffff88800ed9fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.463490] ^ [ 31.464317] ffff88800ed9fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.465317] ffff88800ed9fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.466335] ================================================================== [ 31.467477] Disabling lock debugging due to kernel taint [ 33.478120] BUG: Bad rss-counter state mm:00000000a0318a3e type:MM_FILEPAGES val:33 [ 33.479287] BUG: Bad rss-counter state mm:00000000a0318a3e type:MM_ANONPAGES val:22 [ 33.968640] BUG: Bad rss-counter state mm:0000000064b33fb2 type:MM_FILEPAGES val:33 [ 33.969893] BUG: Bad rss-counter state mm:0000000064b33fb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40490' (ECDSA) to the list of known hosts. 2023/06/21 01:55:23 fuzzer started 2023/06/21 01:55:23 dialing manager at localhost:36067 2023/06/21 01:55:23 checking machine... 2023/06/21 01:55:23 checking revisions... [ 34.701172] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:55:23 testing simple program... [ 34.743482] cgroup: Unknown subsys name 'net' [ 34.802914] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:55:23 Registers: info registers vcpu 0 RAX=ffff888019ed0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019ecfb01 RSI=ffff888019ecfbd8 RDI=ffff888019ecfbd8 RBP=ffff888019ecf5d0 RSP=ffff888019ecf500 R8 =0000000000000001 R9 =ffff888019ecf5b8 R10=0000000000038001 R11=00000000000246fc R12=ffff888019ecf5d8 R13=ffff888019ecf5c0 R14=ffff888019ecfbd8 R15=ffff888019ecf578 RIP=ffffffff8112fbf0 RFL=00000202 [-------] 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 00007f9232b57700 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=00007f714d5dcf30 CR3=000000000f114000 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=2032323a35353a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a35353a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010000 RBX=ffff88806cf293c0 RCX=ffffffff813c2e94 RDX=ffff888015ffb680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88806cf09dd0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=0000000000000000 R13=ffff88806cf2c240 R14=ffff888016e3fdc8 R15=dffffc0000000000 RIP=ffffffff814c0864 RFL=00000096 [--S-AP-] 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 00007f5562459900 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=00007f55627f631c CR3=0000000016e7a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000