syzkaller login: [ 31.329906] BUG: Bad rss-counter state mm:00000000847093e0 type:MM_FILEPAGES val:33 [ 31.331103] BUG: Bad rss-counter state mm:00000000847093e0 type:MM_ANONPAGES val:22 [ 31.373871] ================================================================== [ 31.374942] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.376166] Read of size 8 at addr ffff888009749058 by task sshd/220 [ 31.376671] [ 31.376806] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.377295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.377868] Call Trace: [ 31.378049] [ 31.378211] dump_stack_lvl+0x91/0xf0 [ 31.378491] print_report+0xcc/0x620 [ 31.378772] ? __virt_addr_valid+0x102/0x340 [ 31.379088] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379436] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379786] kasan_report+0xbe/0xf0 [ 31.380069] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.380423] vma_interval_tree_remove+0xc75/0xec0 [ 31.380769] vma_prepare+0xc54/0x11a0 [ 31.381040] __split_vma+0x5af/0x950 [ 31.381303] ? __pfx___split_vma+0x10/0x10 [ 31.381601] ? find_held_lock+0x2c/0x110 [ 31.381895] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.382215] ? lock_is_held_type+0x9f/0x120 [ 31.382526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.382872] ? mtree_range_walk+0x632/0x900 [ 31.383182] ? mas_walk+0x5c7/0x7c0 [ 31.383467] do_vmi_munmap+0x1f1/0x2b0 [ 31.383764] mmap_region+0x1f9/0x2660 [ 31.384060] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.384368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.384806] ? __pfx_lock_acquire+0x10/0x10 [ 31.385123] ? __pfx_mmap_region+0x10/0x10 [ 31.385441] ? security_mmap_addr+0x7d/0xa0 [ 31.385756] ? get_unmapped_area+0x1f5/0x3f0 [ 31.386092] do_mmap+0x854/0xf00 [ 31.386353] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.386652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.386987] ksys_mmap_pgoff+0x3af/0x500 [ 31.387292] do_syscall_64+0x3f/0x90 [ 31.387584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387993] RIP: 0033:0x7fa857ee2d82 [ 31.388266] 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 [ 31.389560] RSP: 002b:00007ffd6320bbc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.390101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa857ee2d82 [ 31.390612] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa85731c000 [ 31.391120] RBP: 00007fa85731c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.391632] R10: 0000000000000812 R11: 0000000000000206 R12: 000055695968dd90 [ 31.392155] R13: 00007ffd6320bbe0 R14: 00007ffd6320bc10 R15: 00007ffd6320bf70 [ 31.392677] [ 31.392850] [ 31.392977] Allocated by task 213: [ 31.393236] kasan_save_stack+0x22/0x50 [ 31.393536] kasan_set_track+0x25/0x30 [ 31.393825] __kasan_slab_alloc+0x59/0x70 [ 31.394134] kmem_cache_alloc+0x16b/0x370 [ 31.394442] vm_area_dup+0x20/0x160 [ 31.394718] __split_vma+0x170/0x950 [ 31.394990] split_vma+0xc6/0x110 [ 31.395251] mprotect_fixup+0x8d2/0xb30 [ 31.395547] do_mprotect_pkey+0x87e/0xd40 [ 31.395869] __x64_sys_mprotect+0x78/0xc0 [ 31.396177] do_syscall_64+0x3f/0x90 [ 31.396459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.396845] [ 31.396971] Freed by task 13: [ 31.397201] kasan_save_stack+0x22/0x50 [ 31.397503] kasan_set_track+0x25/0x30 [ 31.397801] kasan_save_free_info+0x2b/0x50 [ 31.398118] __kasan_slab_free+0x10a/0x190 [ 31.398435] kmem_cache_free+0x10d/0x4d0 [ 31.398735] rcu_core+0x8c8/0x2860 [ 31.399001] __do_softirq+0x1b7/0x7d4 [ 31.399293] [ 31.399423] Last potentially related work creation: [ 31.399770] kasan_save_stack+0x22/0x50 [ 31.400077] __kasan_record_aux_stack+0x8e/0xa0 [ 31.400418] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.400800] remove_vma+0x139/0x170 [ 31.401070] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.401407] do_vmi_munmap+0x1f1/0x2b0 [ 31.401697] __vm_munmap+0x138/0x3a0 [ 31.401974] __x64_sys_munmap+0x59/0x80 [ 31.402274] do_syscall_64+0x3f/0x90 [ 31.402562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.402955] [ 31.403087] The buggy address belongs to the object at ffff888009749000 [ 31.403087] which belongs to the cache vm_area_struct of size 168 [ 31.403999] The buggy address is located 88 bytes inside of [ 31.403999] freed 168-byte region [ffff888009749000, ffff8880097490a8) [ 31.404845] [ 31.404974] The buggy address belongs to the physical page: [ 31.405368] page:00000000205f9e61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9749 [ 31.406018] memcg:ffff8880144fa001 [ 31.406277] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.406702] page_type: 0xffffffff() [ 31.406973] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.407530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144fa001 [ 31.408079] page dumped because: kasan: bad access detected [ 31.408479] [ 31.408604] Memory state around the buggy address: [ 31.408954] ffff888009748f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.409472] ffff888009748f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.409996] >ffff888009749000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.410518] ^ [ 31.410960] ffff888009749080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.411477] ffff888009749100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.411994] ================================================================== [ 31.412556] Disabling lock debugging due to kernel taint [ 33.698396] BUG: Bad rss-counter state mm:00000000fea64f7f type:MM_FILEPAGES val:33 [ 33.699553] BUG: Bad rss-counter state mm:00000000fea64f7f type:MM_ANONPAGES val:22 [ 34.072724] BUG: Bad rss-counter state mm:00000000bef058a1 type:MM_FILEPAGES val:33 [ 34.074100] BUG: Bad rss-counter state mm:00000000bef058a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19367' (ECDSA) to the list of known hosts. 2023/06/20 21:53:15 fuzzer started 2023/06/20 21:53:15 dialing manager at localhost:36067 2023/06/20 21:53:15 checking machine... 2023/06/20 21:53:15 checking revisions... [ 34.789645] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:53:16 testing simple program... [ 34.832723] cgroup: Unknown subsys name 'net' [ 34.878664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:53:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=0000000080000000 RSI=00000000000001b4 RDI=ffffffff85ba4dc0 RBP=ffff88800c5b7d90 RSP=ffff88800c5b7c90 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000004 R13=0000000000000000 R14=ffff88800fdc06b8 R15=ffff88800fdc0080 RIP=ffffffff84536354 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 00007f81e8e77900 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=00007f81e942e618 CR3=000000001d20c000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88801b010e80 RCX=0000000000000000 RDX=ffff88800905b680 RSI=ffffffff81b2592a RDI=0000000000000001 RBP=00000000000001f1 RSP=ffff8880090bf1e8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000128 R12=dffffc0000000000 R13=ffff8880090bf638 R14=0000000000001b1f R15=0000000000000001 RIP=ffffffff814c0880 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=00007f5377ea4230 CR3=0000000008c72000 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=57364d61f0f684ba08499d8385c5bb6d XMM02=ec2efd57dc4c00df000000000011a4c0 XMM03=3248b4a22e674235000000000011a590 XMM04=1e3e4716af0e982c00000000000ae988 XMM05=19e9129bd510f2350000000000131c20 XMM06=4fda316b135da52b0000000000131aa8 XMM07=e042d86d42eb936e0000000000122058 XMM08=3248b4a22e674235000000000011a590 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000