syzkaller login: [ 31.459898] BUG: Bad rss-counter state mm:000000005d25b180 type:MM_FILEPAGES val:33 [ 31.460730] BUG: Bad rss-counter state mm:000000005d25b180 type:MM_ANONPAGES val:22 [ 31.578517] ================================================================== [ 31.579163] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.579770] Read of size 8 at addr ffff88800edc5d08 by task sshd/221 [ 31.580270] [ 31.580416] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.580981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.581649] Call Trace: [ 31.581855] [ 31.582040] dump_stack_lvl+0x91/0xf0 [ 31.582358] print_report+0xcc/0x620 [ 31.582683] ? __virt_addr_valid+0x102/0x340 [ 31.583061] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.583721] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.584164] kasan_report+0xbe/0xf0 [ 31.584508] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.584962] vma_interval_tree_remove+0xc75/0xec0 [ 31.585397] vma_prepare+0xc54/0x11a0 [ 31.585829] __split_vma+0x5af/0x950 [ 31.586226] ? __pfx___split_vma+0x10/0x10 [ 31.586674] ? find_held_lock+0x2c/0x110 [ 31.587120] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.587581] ? lock_is_held_type+0x9f/0x120 [ 31.587994] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.588440] ? mtree_range_walk+0x632/0x900 [ 31.588856] ? mas_walk+0x5c7/0x7c0 [ 31.589191] do_vmi_munmap+0x1f1/0x2b0 [ 31.589530] mmap_region+0x1f9/0x2660 [ 31.589903] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.590265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.590776] ? __pfx_lock_acquire+0x10/0x10 [ 31.591167] ? __pfx_mmap_region+0x10/0x10 [ 31.591536] ? security_mmap_addr+0x7d/0xa0 [ 31.591921] ? get_unmapped_area+0x1f5/0x3f0 [ 31.592304] do_mmap+0x854/0xf00 [ 31.592609] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.592958] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.593344] ksys_mmap_pgoff+0x3af/0x500 [ 31.593729] do_syscall_64+0x3f/0x90 [ 31.594065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.594524] RIP: 0033:0x7f678c457d82 [ 31.594849] 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 [ 31.596415] RSP: 002b:00007fff411c60a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.597004] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f678c457d82 [ 31.597558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f678b891000 [ 31.598205] RBP: 00007f678b891000 R08: 0000000000000009 R09: 0000000000001000 [ 31.598801] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e6be3ed90 [ 31.599370] R13: 00007fff411c60c0 R14: 00007fff411c60f0 R15: 00007fff411c6450 [ 31.599940] [ 31.600152] [ 31.600303] Allocated by task 214: [ 31.600605] kasan_save_stack+0x22/0x50 [ 31.600963] kasan_set_track+0x25/0x30 [ 31.601313] __kasan_slab_alloc+0x59/0x70 [ 31.601707] kmem_cache_alloc+0x16b/0x370 [ 31.602075] vm_area_dup+0x20/0x160 [ 31.602386] __split_vma+0x170/0x950 [ 31.602714] split_vma+0xc6/0x110 [ 31.603005] mprotect_fixup+0x8d2/0xb30 [ 31.603338] do_mprotect_pkey+0x87e/0xd40 [ 31.603681] __x64_sys_mprotect+0x78/0xc0 [ 31.604036] do_syscall_64+0x3f/0x90 [ 31.604362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604808] [ 31.604954] Freed by task 214: [ 31.605221] kasan_save_stack+0x22/0x50 [ 31.605592] kasan_set_track+0x25/0x30 [ 31.605949] kasan_save_free_info+0x2b/0x50 [ 31.606338] __kasan_slab_free+0x10a/0x190 [ 31.606680] kmem_cache_free+0x10d/0x4d0 [ 31.607006] rcu_core+0x8c8/0x2860 [ 31.607340] __do_softirq+0x1b7/0x7d4 [ 31.607677] [ 31.607828] Last potentially related work creation: [ 31.608231] kasan_save_stack+0x22/0x50 [ 31.608575] __kasan_record_aux_stack+0x8e/0xa0 [ 31.608967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.609414] remove_vma+0x139/0x170 [ 31.609760] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.610120] do_vmi_munmap+0x1f1/0x2b0 [ 31.610433] __vm_munmap+0x138/0x3a0 [ 31.610754] __x64_sys_munmap+0x59/0x80 [ 31.611106] do_syscall_64+0x3f/0x90 [ 31.611430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.611877] [ 31.612026] Second to last potentially related work creation: [ 31.612493] kasan_save_stack+0x22/0x50 [ 31.612834] __kasan_record_aux_stack+0x8e/0xa0 [ 31.613214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.613666] remove_vma+0x139/0x170 [ 31.613990] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.614378] do_vmi_munmap+0x1f1/0x2b0 [ 31.614706] mmap_region+0x1f9/0x2660 [ 31.615028] do_mmap+0x854/0xf00 [ 31.615318] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.615636] ksys_mmap_pgoff+0x3af/0x500 [ 31.615968] do_syscall_64+0x3f/0x90 [ 31.616285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.616725] [ 31.616872] The buggy address belongs to the object at ffff88800edc5cb0 [ 31.616872] which belongs to the cache vm_area_struct of size 168 [ 31.617888] The buggy address is located 88 bytes inside of [ 31.617888] freed 168-byte region [ffff88800edc5cb0, ffff88800edc5d58) [ 31.618841] [ 31.618985] The buggy address belongs to the physical page: [ 31.619428] page:000000008ba35f34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedc5 [ 31.620151] memcg:ffff8880147efd01 [ 31.620428] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.620873] page_type: 0xffffffff() [ 31.621184] raw: 0100000000000200 ffff8880087a0c80 ffffea000058da00 dead000000000008 [ 31.621845] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147efd01 [ 31.622445] page dumped because: kasan: bad access detected [ 31.622885] [ 31.623024] Memory state around the buggy address: [ 31.623398] ffff88800edc5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.623951] ffff88800edc5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.624637] >ffff88800edc5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.625192] ^ [ 31.625486] ffff88800edc5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.626089] ffff88800edc5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.626683] ================================================================== [ 31.627336] Disabling lock debugging due to kernel taint [ 33.735824] BUG: Bad rss-counter state mm:0000000057a8f9a9 type:MM_FILEPAGES val:33 [ 33.736509] BUG: Bad rss-counter state mm:0000000057a8f9a9 type:MM_ANONPAGES val:22 [ 34.167062] BUG: Bad rss-counter state mm:00000000f53da023 type:MM_FILEPAGES val:33 [ 34.167668] BUG: Bad rss-counter state mm:00000000f53da023 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21168' (ECDSA) to the list of known hosts. 2023/06/21 09:52:57 fuzzer started 2023/06/21 09:52:57 dialing manager at localhost:36067 2023/06/21 09:52:57 checking machine... 2023/06/21 09:52:57 checking revisions... [ 34.681522] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:52:57 testing simple program... [ 34.720043] cgroup: Unknown subsys name 'net' [ 34.767255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:52:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000452 RCX=0000000000000060 RDX=00007ffe7535d740 RSI=0000000000000452 RDI=00007ffe7535d800 RBP=00007ffe7535d740 RSP=00007ffe7535d628 R8 =00000000ffffffff R9 =00007ffe7535d4d0 R10=00007f5fe7d5ba57 R11=0000000000000000 R12=00007ffe7535d740 R13=0000000000000008 R14=0000000000000000 R15=0000000000000000 RIP=00007f5fe775eb8e RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5fe720b900 00000000 00000000 GS =0000 0000000000000000 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=00007f5fe77c2618 CR3=000000001c99a000 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=6c616e696d72657420322e322e302e30 XMM02=5fe98a486066ab28c8527122ee59ec00 XMM03=e2cc60d1cc3ef3f1ebb30940fba8a0ee XMM04=656d616e74736f682022646873732f6e XMM05=00000000000000000000000000000000 XMM06=656d61223d736363202064686e692f65 XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f71391d0dc0 CR3=000000000f586000 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=8eb27a57162c9989084f07f698f5fbd2 XMM02=000000000011ada8eff9b2d0a8fce9cb XMM03=000000000011ae782c67c8bc2e329bc3 XMM04=bd563bb54a403b2200000000000ae988 XMM05=e4cb8bb95a7664b60000000000132d68 XMM06=c291bd5c70af25b90000000000132bf0 XMM07=e042d86d42eb936e0000000000121e78 XMM08=e39b13691a12b600000000000011ae78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000