syzkaller login: [ 29.109147] BUG: Bad rss-counter state mm:00000000688134f5 type:MM_FILEPAGES val:33 [ 29.110158] BUG: Bad rss-counter state mm:00000000688134f5 type:MM_ANONPAGES val:22 [ 29.273429] ================================================================== [ 29.274518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.275628] Read of size 8 at addr ffff8880095c35c8 by task sshd/222 [ 29.276645] [ 29.276867] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.277727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.278710] Call Trace: [ 29.279029] [ 29.279317] dump_stack_lvl+0x91/0xf0 [ 29.279806] print_report+0xcc/0x620 [ 29.280291] ? __virt_addr_valid+0x102/0x340 [ 29.280853] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.281467] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.282083] kasan_report+0xbe/0xf0 [ 29.282562] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.283187] vma_interval_tree_remove+0xc75/0xec0 [ 29.283789] vma_prepare+0xc54/0x11a0 [ 29.284266] __split_vma+0x5af/0x950 [ 29.284761] ? __pfx___split_vma+0x10/0x10 [ 29.285292] ? find_held_lock+0x2c/0x110 [ 29.285814] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.286375] ? lock_is_held_type+0x9f/0x120 [ 29.286914] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.287527] ? mtree_range_walk+0x632/0x900 [ 29.288080] ? mas_walk+0x5c7/0x7c0 [ 29.288563] do_vmi_munmap+0x1f1/0x2b0 [ 29.289064] mmap_region+0x1f9/0x2660 [ 29.289544] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.290058] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.290764] ? __pfx_lock_acquire+0x10/0x10 [ 29.291292] ? __pfx_mmap_region+0x10/0x10 [ 29.291827] ? security_mmap_addr+0x7d/0xa0 [ 29.292357] ? get_unmapped_area+0x1f5/0x3f0 [ 29.292941] do_mmap+0x854/0xf00 [ 29.293393] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.293907] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.294480] ksys_mmap_pgoff+0x3af/0x500 [ 29.294993] do_syscall_64+0x3f/0x90 [ 29.295480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.296147] RIP: 0033:0x7f8e83a16d82 [ 29.296625] 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 [ 29.298772] RSP: 002b:00007fff9efcb698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.299698] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e83a16d82 [ 29.300576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e82e50000 [ 29.301444] RBP: 00007f8e82e50000 R08: 0000000000000009 R09: 0000000000001000 [ 29.302314] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564ddf04ec0 [ 29.303183] R13: 00007fff9efcb6b0 R14: 00007fff9efcb6e0 R15: 00007fff9efcba40 [ 29.304062] [ 29.304357] [ 29.304601] Allocated by task 215: [ 29.305040] kasan_save_stack+0x22/0x50 [ 29.305556] kasan_set_track+0x25/0x30 [ 29.306067] __kasan_slab_alloc+0x59/0x70 [ 29.306605] kmem_cache_alloc+0x16b/0x370 [ 29.307133] vm_area_dup+0x20/0x160 [ 29.307595] __split_vma+0x170/0x950 [ 29.308071] split_vma+0xc6/0x110 [ 29.308526] mprotect_fixup+0x8d2/0xb30 [ 29.309025] do_mprotect_pkey+0x87e/0xd40 [ 29.309544] __x64_sys_mprotect+0x78/0xc0 [ 29.310060] do_syscall_64+0x3f/0x90 [ 29.310537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.311175] [ 29.311388] Freed by task 215: [ 29.311782] kasan_save_stack+0x22/0x50 [ 29.312292] kasan_set_track+0x25/0x30 [ 29.312787] kasan_save_free_info+0x2b/0x50 [ 29.313315] __kasan_slab_free+0x10a/0x190 [ 29.313845] kmem_cache_free+0x10d/0x4d0 [ 29.314351] rcu_core+0x8c8/0x2860 [ 29.314800] __do_softirq+0x1b7/0x7d4 [ 29.315278] [ 29.315491] Last potentially related work creation: [ 29.316073] kasan_save_stack+0x22/0x50 [ 29.316591] __kasan_record_aux_stack+0x8e/0xa0 [ 29.317158] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.317801] remove_vma+0x139/0x170 [ 29.318251] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.318804] do_vmi_munmap+0x1f1/0x2b0 [ 29.319293] __vm_munmap+0x138/0x3a0 [ 29.319761] __x64_sys_munmap+0x59/0x80 [ 29.320264] do_syscall_64+0x3f/0x90 [ 29.320745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.321387] [ 29.321600] Second to last potentially related work creation: [ 29.322285] kasan_save_stack+0x22/0x50 [ 29.322785] __kasan_record_aux_stack+0x8e/0xa0 [ 29.323360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.323998] remove_vma+0x139/0x170 [ 29.324464] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.325019] do_vmi_munmap+0x1f1/0x2b0 [ 29.325505] __vm_munmap+0x138/0x3a0 [ 29.325991] __x64_sys_munmap+0x59/0x80 [ 29.326489] do_syscall_64+0x3f/0x90 [ 29.326966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.327611] [ 29.327826] The buggy address belongs to the object at ffff8880095c3570 [ 29.327826] which belongs to the cache vm_area_struct of size 168 [ 29.329308] The buggy address is located 88 bytes inside of [ 29.329308] freed 168-byte region [ffff8880095c3570, ffff8880095c3618) [ 29.330721] [ 29.330944] The buggy address belongs to the physical page: [ 29.331607] page:000000005b179a29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95c3 [ 29.332703] memcg:ffff88800c825301 [ 29.333141] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.333845] page_type: 0xffffffff() [ 29.334298] raw: 0100000000000200 ffff88800879fc80 ffffea0000237000 dead000000000009 [ 29.335215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c825301 [ 29.336109] page dumped because: kasan: bad access detected [ 29.336780] [ 29.337002] Memory state around the buggy address: [ 29.337575] ffff8880095c3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.338421] ffff8880095c3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.339265] >ffff8880095c3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.340108] ^ [ 29.340785] ffff8880095c3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.341632] ffff8880095c3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.342473] ================================================================== [ 29.343434] Disabling lock debugging due to kernel taint [ 31.304970] BUG: Bad rss-counter state mm:000000007c55aa92 type:MM_FILEPAGES val:33 [ 31.306052] BUG: Bad rss-counter state mm:000000007c55aa92 type:MM_ANONPAGES val:22 [ 31.772609] BUG: Bad rss-counter state mm:00000000fd3438ff type:MM_FILEPAGES val:33 [ 31.774019] BUG: Bad rss-counter state mm:00000000fd3438ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2526' (ECDSA) to the list of known hosts. 2023/06/20 07:36:16 fuzzer started 2023/06/20 07:36:17 dialing manager at localhost:44161 2023/06/20 07:36:17 checking machine... 2023/06/20 07:36:17 checking revisions... [ 32.498849] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:36:17 testing simple program... [ 32.540845] cgroup: Unknown subsys name 'net' [ 32.573194] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:36:16 Registers: info registers vcpu 0 RAX=000000000000000c RBX=0000000000000000 RCX=00007ffd6da90508 RDX=ffff888015da51c0 RSI=ffffffff8363614a RDI=0000000000000007 RBP=00007ffd6da90508 RSP=ffff888016ea7cb8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000000c R13=000000000000000c R14=ffff888016ea7e10 R15=00007ffd6da9050c RIP=ffffffff8450648b RFL=00040293 [--S-A-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 00007fa5609dc900 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=00007ffd6da91000 CR3=000000000e3c6000 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=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 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=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007faaed3ea890 CR3=00000000102ee000 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=2036313a36333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a36333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000