syzkaller login: [ 32.736796] BUG: Bad rss-counter state mm:00000000d7019c37 type:MM_FILEPAGES val:33 [ 32.737802] BUG: Bad rss-counter state mm:00000000d7019c37 type:MM_ANONPAGES val:22 [ 32.899513] ================================================================== [ 32.900625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.901726] Read of size 8 at addr ffff88800f847d08 by task sshd/220 [ 32.902746] [ 32.902963] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.903839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.904831] Call Trace: [ 32.905162] [ 32.905448] dump_stack_lvl+0x91/0xf0 [ 32.905949] print_report+0xcc/0x620 [ 32.906449] ? __virt_addr_valid+0x102/0x340 [ 32.907010] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.907639] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.908257] kasan_report+0xbe/0xf0 [ 32.908739] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.909376] vma_interval_tree_remove+0xc75/0xec0 [ 32.909975] vma_prepare+0xc54/0x11a0 [ 32.910476] __split_vma+0x5af/0x950 [ 32.910951] ? __pfx___split_vma+0x10/0x10 [ 32.911474] ? find_held_lock+0x2c/0x110 [ 32.911991] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.912551] ? lock_is_held_type+0x9f/0x120 [ 32.913083] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.913690] ? mtree_range_walk+0x632/0x900 [ 32.914252] ? mas_walk+0x5c7/0x7c0 [ 32.914725] do_vmi_munmap+0x1f1/0x2b0 [ 32.915226] mmap_region+0x1f9/0x2660 [ 32.915710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.916225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.916937] ? __pfx_lock_acquire+0x10/0x10 [ 32.917473] ? __pfx_mmap_region+0x10/0x10 [ 32.918004] ? security_mmap_addr+0x7d/0xa0 [ 32.918562] ? get_unmapped_area+0x1f5/0x3f0 [ 32.919112] do_mmap+0x854/0xf00 [ 32.919550] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.920048] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.920611] ksys_mmap_pgoff+0x3af/0x500 [ 32.921120] do_syscall_64+0x3f/0x90 [ 32.921603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.922256] RIP: 0033:0x7f777ac71d82 [ 32.922715] 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 [ 32.924823] RSP: 002b:00007fffa4520358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.925732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f777ac71d82 [ 32.926589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f777a0ab000 [ 32.927427] RBP: 00007f777a0ab000 R08: 0000000000000009 R09: 0000000000001000 [ 32.928261] R10: 0000000000000812 R11: 0000000000000206 R12: 000056445d137ec0 [ 32.929099] R13: 00007fffa4520370 R14: 00007fffa45203a0 R15: 00007fffa4520700 [ 32.929946] [ 32.930254] [ 32.930472] Allocated by task 213: [ 32.930896] kasan_save_stack+0x22/0x50 [ 32.931413] kasan_set_track+0x25/0x30 [ 32.931912] __kasan_slab_alloc+0x59/0x70 [ 32.932432] kmem_cache_alloc+0x16b/0x370 [ 32.932949] vm_area_dup+0x20/0x160 [ 32.933402] __split_vma+0x170/0x950 [ 32.933863] split_vma+0xc6/0x110 [ 32.934310] mprotect_fixup+0x8d2/0xb30 [ 32.934812] do_mprotect_pkey+0x87e/0xd40 [ 32.935330] __x64_sys_mprotect+0x78/0xc0 [ 32.935847] do_syscall_64+0x3f/0x90 [ 32.936318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.936958] [ 32.937174] Freed by task 19: [ 32.937557] kasan_save_stack+0x22/0x50 [ 32.938058] kasan_set_track+0x25/0x30 [ 32.938569] kasan_save_free_info+0x2b/0x50 [ 32.939101] __kasan_slab_free+0x10a/0x190 [ 32.939631] kmem_cache_free+0x10d/0x4d0 [ 32.940137] rcu_core+0x8c8/0x2860 [ 32.940578] __do_softirq+0x1b7/0x7d4 [ 32.941054] [ 32.941268] Last potentially related work creation: [ 32.941854] kasan_save_stack+0x22/0x50 [ 32.942362] __kasan_record_aux_stack+0x8e/0xa0 [ 32.942934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.943655] remove_vma+0x139/0x170 [ 32.944112] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.944669] do_vmi_munmap+0x1f1/0x2b0 [ 32.945156] __vm_munmap+0x138/0x3a0 [ 32.945621] __x64_sys_munmap+0x59/0x80 [ 32.946119] do_syscall_64+0x3f/0x90 [ 32.946613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.947251] [ 32.947465] The buggy address belongs to the object at ffff88800f847cb0 [ 32.947465] which belongs to the cache vm_area_struct of size 168 [ 32.948932] The buggy address is located 88 bytes inside of [ 32.948932] freed 168-byte region [ffff88800f847cb0, ffff88800f847d58) [ 32.950327] [ 32.950543] The buggy address belongs to the physical page: [ 32.951193] page:0000000095ab0782 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf847 [ 32.952261] memcg:ffff88800cb41101 [ 32.952686] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.953325] page_type: 0xffffffff() [ 32.953771] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.954698] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb41101 [ 32.955598] page dumped because: kasan: bad access detected [ 32.956255] [ 32.956474] Memory state around the buggy address: [ 32.957049] ffff88800f847c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.957899] ffff88800f847c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.958772] >ffff88800f847d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.959622] ^ [ 32.960056] ffff88800f847d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.960905] ffff88800f847e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.961751] ================================================================== [ 32.962873] Disabling lock debugging due to kernel taint [ 34.734427] BUG: Bad rss-counter state mm:00000000d0f0dea8 type:MM_FILEPAGES val:33 [ 34.735609] BUG: Bad rss-counter state mm:00000000d0f0dea8 type:MM_ANONPAGES val:22 [ 35.162832] BUG: Bad rss-counter state mm:0000000033ddce97 type:MM_FILEPAGES val:33 [ 35.163830] BUG: Bad rss-counter state mm:0000000033ddce97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52075' (ECDSA) to the list of known hosts. 2023/06/20 00:47:10 fuzzer started 2023/06/20 00:47:10 dialing manager at localhost:44161 2023/06/20 00:47:10 checking machine... 2023/06/20 00:47:10 checking revisions... [ 35.833488] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:47:10 testing simple program... [ 35.884124] cgroup: Unknown subsys name 'net' [ 35.921859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:47:07 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88801a0451c0 RSI=ffffffff83ab3fa9 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880166cf500 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000a4 R11=00000a4100000a41 R12=0000000000000000 R13=00000000000000a4 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 RFL=00000283 [--S---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 00007f13c4234900 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=00007ffecbb45000 CR3=000000001ba48000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81288931 RBX=ffffffff85da7dfc RCX=ffffffff812889a4 RDX=0000000000000000 RSI=ffffffff860b82d8 RDI=ffffffff85da7ddc RBP=ffffffff85da7dfc RSP=ffff88806cf099b8 R8 =ffffffff860b82d8 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000ba82 R12=ffffffff85da7dfc R13=ffffffff85da7ddc R14=ffffffff85da7df8 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000202 [-------] 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=00007fe429e027a0 CR3=000000000c796000 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=95052b81b53e7f9198429ffcc34cb3dc XMM02=2c67c8bc2e329bc3000000000011c2a8 XMM03=fb795ef6d65770560000000000123c28 XMM04=2422f8c4141f751100000000000ae988 XMM05=1dbda78c22f4024300000000001345f8 XMM06=4fda316b135da52b0000000000133698 XMM07=e042d86d42eb936e0000000000123ea8 XMM08=44c23508f03e920b000000000011c308 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000