syzkaller login: [ 31.116053] BUG: Bad rss-counter state mm:000000005f6a3181 type:MM_FILEPAGES val:33 [ 31.117034] BUG: Bad rss-counter state mm:000000005f6a3181 type:MM_ANONPAGES val:22 [ 31.281576] ================================================================== [ 31.282649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.283905] Read of size 8 at addr ffff888016ada310 by task sshd/220 [ 31.284744] [ 31.284961] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.285849] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.286829] Call Trace: [ 31.287150] [ 31.287449] dump_stack_lvl+0x91/0xf0 [ 31.287946] print_report+0xcc/0x620 [ 31.288433] ? __virt_addr_valid+0x102/0x340 [ 31.288998] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289632] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.290243] kasan_report+0xbe/0xf0 [ 31.290727] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291359] vma_interval_tree_remove+0xc75/0xec0 [ 31.291982] vma_prepare+0xc54/0x11a0 [ 31.292459] __split_vma+0x5af/0x950 [ 31.292926] ? __pfx___split_vma+0x10/0x10 [ 31.293458] ? find_held_lock+0x2c/0x110 [ 31.293974] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.294543] ? lock_is_held_type+0x9f/0x120 [ 31.295082] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.295706] ? mtree_range_walk+0x632/0x900 [ 31.296257] ? mas_walk+0x5c7/0x7c0 [ 31.296730] do_vmi_munmap+0x1f1/0x2b0 [ 31.297224] mmap_region+0x1f9/0x2660 [ 31.297703] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.298210] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.298926] ? __pfx_lock_acquire+0x10/0x10 [ 31.299472] ? __pfx_mmap_region+0x10/0x10 [ 31.300000] ? security_mmap_addr+0x7d/0xa0 [ 31.300535] ? get_unmapped_area+0x1f5/0x3f0 [ 31.301084] do_mmap+0x854/0xf00 [ 31.301525] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.302014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.302576] ksys_mmap_pgoff+0x3af/0x500 [ 31.303083] do_syscall_64+0x3f/0x90 [ 31.303581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304223] RIP: 0033:0x7fe5acef5d82 [ 31.304679] 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 [ 31.306789] RSP: 002b:00007ffe03cfe268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.307709] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5acef5d82 [ 31.308565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5ac32f000 [ 31.309422] RBP: 00007fe5ac32f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.310276] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8123edec0 [ 31.311139] R13: 00007ffe03cfe280 R14: 00007ffe03cfe2b0 R15: 00007ffe03cfe610 [ 31.312017] [ 31.312310] [ 31.312530] Allocated by task 213: [ 31.312951] kasan_save_stack+0x22/0x50 [ 31.313450] kasan_set_track+0x25/0x30 [ 31.313938] __kasan_slab_alloc+0x59/0x70 [ 31.314464] kmem_cache_alloc+0x16b/0x370 [ 31.314974] vm_area_dup+0x20/0x160 [ 31.315457] __split_vma+0x170/0x950 [ 31.315919] split_vma+0xc6/0x110 [ 31.316366] mprotect_fixup+0x8d2/0xb30 [ 31.316870] do_mprotect_pkey+0x87e/0xd40 [ 31.317395] __x64_sys_mprotect+0x78/0xc0 [ 31.317919] do_syscall_64+0x3f/0x90 [ 31.318393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319042] [ 31.319263] Freed by task 213: [ 31.319666] kasan_save_stack+0x22/0x50 [ 31.320175] kasan_set_track+0x25/0x30 [ 31.320668] kasan_save_free_info+0x2b/0x50 [ 31.321202] __kasan_slab_free+0x10a/0x190 [ 31.321739] kmem_cache_free+0x10d/0x4d0 [ 31.322242] rcu_core+0x8c8/0x2860 [ 31.322689] __do_softirq+0x1b7/0x7d4 [ 31.323173] [ 31.323409] Last potentially related work creation: [ 31.324001] kasan_save_stack+0x22/0x50 [ 31.324509] __kasan_record_aux_stack+0x8e/0xa0 [ 31.325078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.325725] remove_vma+0x139/0x170 [ 31.326180] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.326742] do_vmi_munmap+0x1f1/0x2b0 [ 31.327224] __vm_munmap+0x138/0x3a0 [ 31.327696] __x64_sys_munmap+0x59/0x80 [ 31.328199] do_syscall_64+0x3f/0x90 [ 31.328674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329314] [ 31.329532] The buggy address belongs to the object at ffff888016ada2b8 [ 31.329532] which belongs to the cache vm_area_struct of size 168 [ 31.330993] The buggy address is located 88 bytes inside of [ 31.330993] freed 168-byte region [ffff888016ada2b8, ffff888016ada360) [ 31.332398] [ 31.332618] The buggy address belongs to the physical page: [ 31.333276] page:00000000a75b9620 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ada [ 31.334370] memcg:ffff888016eba601 [ 31.334794] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.335453] page_type: 0xffffffff() [ 31.335904] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.336825] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016eba601 [ 31.337743] page dumped because: kasan: bad access detected [ 31.338421] [ 31.338639] Memory state around the buggy address: [ 31.339220] ffff888016ada200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.340080] ffff888016ada280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.340934] >ffff888016ada300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.341789] ^ [ 31.342261] ffff888016ada380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.343113] ffff888016ada400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.343981] ================================================================== [ 31.344972] Disabling lock debugging due to kernel taint [ 34.134306] BUG: Bad rss-counter state mm:00000000a19f966b type:MM_FILEPAGES val:33 [ 34.135036] BUG: Bad rss-counter state mm:00000000a19f966b type:MM_ANONPAGES val:22 [ 34.560387] BUG: Bad rss-counter state mm:0000000033c07e4a type:MM_FILEPAGES val:33 [ 34.561262] BUG: Bad rss-counter state mm:0000000033c07e4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28472' (ECDSA) to the list of known hosts. 2023/06/20 18:05:32 fuzzer started 2023/06/20 18:05:32 dialing manager at localhost:36067 2023/06/20 18:05:32 checking machine... 2023/06/20 18:05:32 checking revisions... [ 35.277225] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:05:32 testing simple program... [ 35.334555] cgroup: Unknown subsys name 'net' [ 35.370753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:05:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007faa3bdfc000 CR3=000000000ed5c000 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=3ce6ee3e7c00728cda4f1c63d11f7283 XMM02=000000000011a598ec2efd57dc4c00df XMM03=0000000000121b1092abfe35b4cdec78 XMM04=8cece302aa1bc54700000000000ae988 XMM05=97ea83b63865618100000000001327c0 XMM06=4fda316b135da52b0000000000131860 XMM07=e042d86d42eb936e0000000000121d90 XMM08=92abfe35b4cdec78000000000011a5f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff854ee9e0 RCX=ffffffff814821b6 RDX=ffff888019dfd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016727df8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=ffffffff854ee9e0 R15=0000000000000000 RIP=ffffffff814c027c 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 00007f5a0f6b9900 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=00005609792954c8 CR3=00000000098ea000 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=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