syzkaller login: [ 60.369128] BUG: Bad rss-counter state mm:0000000000b388a8 type:MM_FILEPAGES val:33 [ 60.370293] BUG: Bad rss-counter state mm:0000000000b388a8 type:MM_ANONPAGES val:22 [ 60.546034] ================================================================== [ 60.547033] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.548065] Read of size 8 at addr ffff88800d72ed08 by task sshd/220 [ 60.549009] [ 60.549244] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.550172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.551246] Call Trace: [ 60.551593] [ 60.551908] dump_stack_lvl+0x91/0xf0 [ 60.552435] print_report+0xcc/0x620 [ 60.552955] ? __virt_addr_valid+0x102/0x340 [ 60.553542] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.554214] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.554876] kasan_report+0xbe/0xf0 [ 60.555383] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.556056] vma_interval_tree_remove+0xc75/0xec0 [ 60.556703] vma_prepare+0xc54/0x11a0 [ 60.557222] __split_vma+0x5af/0x950 [ 60.557733] ? __pfx___split_vma+0x10/0x10 [ 60.558298] ? find_held_lock+0x2c/0x110 [ 60.558874] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.559483] ? lock_is_held_type+0x9f/0x120 [ 60.560103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.560781] ? mtree_range_walk+0x632/0x900 [ 60.561399] ? mas_walk+0x5c7/0x7c0 [ 60.561927] do_vmi_munmap+0x1f1/0x2b0 [ 60.562460] mmap_region+0x1f9/0x2660 [ 60.562988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.563526] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.564288] ? __pfx_lock_acquire+0x10/0x10 [ 60.564898] ? __pfx_mmap_region+0x10/0x10 [ 60.565507] ? security_mmap_addr+0x7d/0xa0 [ 60.566129] ? get_unmapped_area+0x1f5/0x3f0 [ 60.566755] do_mmap+0x854/0xf00 [ 60.567247] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.567805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.568446] ksys_mmap_pgoff+0x3af/0x500 [ 60.569017] do_syscall_64+0x3f/0x90 [ 60.569575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.570297] RIP: 0033:0x7fd1e28c1d82 [ 60.570802] 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 [ 60.573169] RSP: 002b:00007fff3a855c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.574138] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1e28c1d82 [ 60.575044] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1e1cfb000 [ 60.575969] RBP: 00007fd1e1cfb000 R08: 0000000000000009 R09: 0000000000001000 [ 60.576880] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ed92d5ec0 [ 60.577776] R13: 00007fff3a855c30 R14: 00007fff3a855c60 R15: 00007fff3a855fc0 [ 60.578661] [ 60.578975] [ 60.579207] Allocated by task 213: [ 60.579671] kasan_save_stack+0x22/0x50 [ 60.580230] kasan_set_track+0x25/0x30 [ 60.580784] __kasan_slab_alloc+0x59/0x70 [ 60.581381] kmem_cache_alloc+0x16b/0x370 [ 60.581967] vm_area_dup+0x20/0x160 [ 60.582488] __split_vma+0x170/0x950 [ 60.583026] split_vma+0xc6/0x110 [ 60.583533] mprotect_fixup+0x8d2/0xb30 [ 60.584102] do_mprotect_pkey+0x87e/0xd40 [ 60.584683] __x64_sys_mprotect+0x78/0xc0 [ 60.585272] do_syscall_64+0x3f/0x90 [ 60.585816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.586513] [ 60.586750] Freed by task 213: [ 60.587188] kasan_save_stack+0x22/0x50 [ 60.587751] kasan_set_track+0x25/0x30 [ 60.588292] kasan_save_free_info+0x2b/0x50 [ 60.588880] __kasan_slab_free+0x10a/0x190 [ 60.589465] kmem_cache_free+0x10d/0x4d0 [ 60.590026] rcu_core+0x8c8/0x2860 [ 60.590511] __do_softirq+0x1b7/0x7d4 [ 60.591035] [ 60.591263] Last potentially related work creation: [ 60.591890] kasan_save_stack+0x22/0x50 [ 60.592411] __kasan_record_aux_stack+0x8e/0xa0 [ 60.593006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.593696] remove_vma+0x139/0x170 [ 60.594224] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.594835] do_vmi_munmap+0x1f1/0x2b0 [ 60.595367] __vm_munmap+0x138/0x3a0 [ 60.595887] __x64_sys_munmap+0x59/0x80 [ 60.596416] do_syscall_64+0x3f/0x90 [ 60.596928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.597632] [ 60.597865] The buggy address belongs to the object at ffff88800d72ecb0 [ 60.597865] which belongs to the cache vm_area_struct of size 168 [ 60.599479] The buggy address is located 88 bytes inside of [ 60.599479] freed 168-byte region [ffff88800d72ecb0, ffff88800d72ed58) [ 60.600973] [ 60.601202] The buggy address belongs to the physical page: [ 60.601911] page:000000000d97dd23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd72e [ 60.603091] memcg:ffff88800c76a801 [ 60.603560] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.604280] page_type: 0xffffffff() [ 60.604781] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.605789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c76a801 [ 60.606776] page dumped because: kasan: bad access detected [ 60.607508] [ 60.607761] Memory state around the buggy address: [ 60.608404] ffff88800d72ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 60.609370] ffff88800d72ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.610362] >ffff88800d72ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.611351] ^ [ 60.611855] ffff88800d72ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.612831] ffff88800d72ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.613812] ================================================================== [ 60.614933] Disabling lock debugging due to kernel taint [ 63.266211] BUG: Bad rss-counter state mm:000000007c32caf2 type:MM_FILEPAGES val:33 [ 63.267597] BUG: Bad rss-counter state mm:000000007c32caf2 type:MM_ANONPAGES val:22 [ 63.805057] BUG: Bad rss-counter state mm:00000000462e7e41 type:MM_FILEPAGES val:33 [ 63.806298] BUG: Bad rss-counter state mm:00000000462e7e41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56761' (ECDSA) to the list of known hosts. 2023/06/21 07:24:11 fuzzer started 2023/06/21 07:24:12 dialing manager at localhost:36067 2023/06/21 07:24:12 checking machine... 2023/06/21 07:24:12 checking revisions... [ 64.510037] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:24:12 testing simple program... [ 64.577791] cgroup: Unknown subsys name 'net' [ 64.637403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:24:11 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000002 RCX=ffffffff813782c0 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000003 RSP=ffff88806ce09e68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=0000000000000000 R15=ffff8880096ff228 RIP=ffffffff813782c8 RFL=00000247 [---Z-PC] 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 00007fab309f0900 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=00007fab2ff0e000 CR3=000000000c630000 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=0389394026dc3084f442599f651cd7d4 XMM02=000000000011a678d59e07bde36eea69 XMM03=000000000011a7a0ec2efd57dc4c00df XMM04=1a3df6799f4cc2a600000000000ae988 XMM05=ecedf14f7e55ed080000000000132d10 XMM06=099f7093dd51ddd90000000000131ab0 XMM07=fb795ef6d65770560000000000121d18 XMM08=2c67c8bc2e329bc3000000000011a7a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f17de952366 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=00007f17de952366 RDI=ffffffff85652c60 RBP=00007f17de952366 RSP=ffff88800fba7240 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800fba7358 R13=0000000000000000 R14=ffff88800e2db680 R15=ffff88800e840000 RIP=ffffffff814c8456 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 00007f17de45f900 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=00007f17dea16618 CR3=0000000019fdc000 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=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