syzkaller login: [ 31.409594] BUG: Bad rss-counter state mm:00000000320fbfae type:MM_FILEPAGES val:33 [ 31.411168] BUG: Bad rss-counter state mm:00000000320fbfae type:MM_ANONPAGES val:22 [ 31.546268] ================================================================== [ 31.546975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.547703] Read of size 8 at addr ffff88800ca713f8 by task sshd/221 [ 31.548274] [ 31.548437] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.549095] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.549824] Call Trace: [ 31.550197] [ 31.550433] dump_stack_lvl+0x91/0xf0 [ 31.550811] print_report+0xcc/0x620 [ 31.551208] ? __virt_addr_valid+0x102/0x340 [ 31.551636] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.552095] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.552576] kasan_report+0xbe/0xf0 [ 31.552934] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.553420] vma_interval_tree_remove+0xc75/0xec0 [ 31.553875] vma_prepare+0xc54/0x11a0 [ 31.554236] __split_vma+0x5af/0x950 [ 31.554590] ? __pfx___split_vma+0x10/0x10 [ 31.554999] ? find_held_lock+0x2c/0x110 [ 31.555405] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.555839] ? lock_is_held_type+0x9f/0x120 [ 31.556241] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.556699] ? mtree_range_walk+0x632/0x900 [ 31.557117] ? mas_walk+0x5c7/0x7c0 [ 31.557477] do_vmi_munmap+0x1f1/0x2b0 [ 31.557850] mmap_region+0x1f9/0x2660 [ 31.558222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.558604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.559157] ? __pfx_lock_acquire+0x10/0x10 [ 31.559558] ? __pfx_mmap_region+0x10/0x10 [ 31.559960] ? security_mmap_addr+0x7d/0xa0 [ 31.560367] ? get_unmapped_area+0x1f5/0x3f0 [ 31.560785] do_mmap+0x854/0xf00 [ 31.561116] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.561490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.561910] ksys_mmap_pgoff+0x3af/0x500 [ 31.562290] do_syscall_64+0x3f/0x90 [ 31.562647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.563144] RIP: 0033:0x7f586ee23d82 [ 31.563485] 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 [ 31.565089] RSP: 002b:00007ffc7f7b0788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.565773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f586ee23d82 [ 31.566424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f586e25d000 [ 31.567067] RBP: 00007f586e25d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.567699] R10: 0000000000000812 R11: 0000000000000206 R12: 000056307a7a7d90 [ 31.568333] R13: 00007ffc7f7b07a0 R14: 00007ffc7f7b07d0 R15: 00007ffc7f7b0b30 [ 31.568978] [ 31.569198] [ 31.569359] Allocated by task 214: [ 31.569681] kasan_save_stack+0x22/0x50 [ 31.570060] kasan_set_track+0x25/0x30 [ 31.570435] __kasan_slab_alloc+0x59/0x70 [ 31.570844] kmem_cache_alloc+0x16b/0x370 [ 31.571257] vm_area_dup+0x20/0x160 [ 31.571598] __split_vma+0x170/0x950 [ 31.571948] split_vma+0xc6/0x110 [ 31.572286] mprotect_fixup+0x8d2/0xb30 [ 31.572664] do_mprotect_pkey+0x87e/0xd40 [ 31.573058] __x64_sys_mprotect+0x78/0xc0 [ 31.573455] do_syscall_64+0x3f/0x90 [ 31.573814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.574298] [ 31.574459] Freed by task 204: [ 31.574753] kasan_save_stack+0x22/0x50 [ 31.575152] kasan_set_track+0x25/0x30 [ 31.575524] kasan_save_free_info+0x2b/0x50 [ 31.575928] __kasan_slab_free+0x10a/0x190 [ 31.576331] kmem_cache_free+0x10d/0x4d0 [ 31.576710] rcu_core+0x8c8/0x2860 [ 31.577043] __do_softirq+0x1b7/0x7d4 [ 31.577403] [ 31.577566] Last potentially related work creation: [ 31.578006] kasan_save_stack+0x22/0x50 [ 31.578393] __kasan_record_aux_stack+0x8e/0xa0 [ 31.578838] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.579370] remove_vma+0x139/0x170 [ 31.579726] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.580156] do_vmi_munmap+0x1f1/0x2b0 [ 31.580518] __vm_munmap+0x138/0x3a0 [ 31.580871] __x64_sys_munmap+0x59/0x80 [ 31.581250] do_syscall_64+0x3f/0x90 [ 31.581615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.582109] [ 31.582272] The buggy address belongs to the object at ffff88800ca713a0 [ 31.582272] which belongs to the cache vm_area_struct of size 168 [ 31.583412] The buggy address is located 88 bytes inside of [ 31.583412] freed 168-byte region [ffff88800ca713a0, ffff88800ca71448) [ 31.584481] [ 31.584646] The buggy address belongs to the physical page: [ 31.585142] page:0000000062511ba2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca71 [ 31.585967] memcg:ffff88800c769601 [ 31.586292] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.586785] page_type: 0xffffffff() [ 31.587141] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.587836] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c769601 [ 31.588523] page dumped because: kasan: bad access detected [ 31.589022] [ 31.589188] Memory state around the buggy address: [ 31.589624] ffff88800ca71280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.590268] ffff88800ca71300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.590913] >ffff88800ca71380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.591570] ^ [ 31.592210] ffff88800ca71400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.592850] ffff88800ca71480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.593495] ================================================================== [ 31.594351] Disabling lock debugging due to kernel taint [ 33.401109] BUG: Bad rss-counter state mm:000000008917a32b type:MM_FILEPAGES val:33 [ 33.402099] BUG: Bad rss-counter state mm:000000008917a32b type:MM_ANONPAGES val:22 [ 33.858204] BUG: Bad rss-counter state mm:00000000ad69374a type:MM_FILEPAGES val:33 [ 33.859200] BUG: Bad rss-counter state mm:00000000ad69374a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19071' (ECDSA) to the list of known hosts. 2023/06/21 03:04:40 fuzzer started 2023/06/21 03:04:40 dialing manager at localhost:36067 2023/06/21 03:04:40 checking machine... 2023/06/21 03:04:40 checking revisions... [ 34.549653] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:04:40 testing simple program... [ 34.600842] cgroup: Unknown subsys name 'net' [ 34.652355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:04:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888009f5f960 RCX=ffff888009f5f968 RDX=1ffff110013ebf19 RSI=ffff888009f5f898 RDI=ffff888009f5f8c8 RBP=dffffc0000000000 RSP=ffff888009f5f850 R8 =0000000000000001 R9 =ffff888009f5f908 R10=0000000000038001 R11=0000000000006097 R12=ffffed10013ebf1b R13=ffffed10013ebf1a R14=ffff888009f5f910 R15=ffff888009f5f8c8 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007f0e1a89d900 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=0000556880893954 CR3=00000000165b4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f528befe630 CR3=00000000145b0000 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=2c7ca881a121f39de2453240a27fa00a XMM02=2c67c8bc2e329bc3000000000011c7b0 XMM03=fb795ef6d657705600000000001234d8 XMM04=58c280bb5566291100000000000ae988 XMM05=02cccb470d546c620000000000133858 XMM06=c291bd5c70af25b90000000000133250 XMM07=e042d86d42eb936e0000000000123758 XMM08=3edeabbeff4471a7000000000011c810 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000