syzkaller login: [ 31.376038] BUG: Bad rss-counter state mm:000000009381441f type:MM_FILEPAGES val:33 [ 31.377095] BUG: Bad rss-counter state mm:000000009381441f type:MM_ANONPAGES val:22 [ 31.542869] ================================================================== [ 31.543769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.544705] Read of size 8 at addr ffff88800dfbb798 by task sshd/221 [ 31.545483] [ 31.545703] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.546758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.547741] Call Trace: [ 31.548056] [ 31.548342] dump_stack_lvl+0x91/0xf0 [ 31.548853] print_report+0xcc/0x620 [ 31.549348] ? __virt_addr_valid+0x102/0x340 [ 31.549898] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.550508] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.551134] kasan_report+0xbe/0xf0 [ 31.551605] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.552227] vma_interval_tree_remove+0xc75/0xec0 [ 31.552828] vma_prepare+0xc54/0x11a0 [ 31.553321] __split_vma+0x5af/0x950 [ 31.553787] ? __pfx___split_vma+0x10/0x10 [ 31.554323] ? find_held_lock+0x2c/0x110 [ 31.554845] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.555465] ? lock_is_held_type+0x9f/0x120 [ 31.556071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.556721] ? mtree_range_walk+0x632/0x900 [ 31.557367] ? mas_walk+0x5c7/0x7c0 [ 31.557920] do_vmi_munmap+0x1f1/0x2b0 [ 31.558534] mmap_region+0x1f9/0x2660 [ 31.559110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.559716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.560506] ? __pfx_lock_acquire+0x10/0x10 [ 31.561183] ? __pfx_mmap_region+0x10/0x10 [ 31.561934] ? security_mmap_addr+0x7d/0xa0 [ 31.562570] ? get_unmapped_area+0x1f5/0x3f0 [ 31.563296] do_mmap+0x854/0xf00 [ 31.563793] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.564352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.565008] ksys_mmap_pgoff+0x3af/0x500 [ 31.565594] do_syscall_64+0x3f/0x90 [ 31.566157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.567029] RIP: 0033:0x7f85a964cd82 [ 31.567633] 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 [ 31.570269] RSP: 002b:00007ffcf4fc3468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.571227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85a964cd82 [ 31.572076] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85a8a86000 [ 31.572917] RBP: 00007f85a8a86000 R08: 0000000000000009 R09: 0000000000001000 [ 31.573773] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556bd2533d90 [ 31.574620] R13: 00007ffcf4fc3480 R14: 00007ffcf4fc34b0 R15: 00007ffcf4fc3810 [ 31.575476] [ 31.575765] [ 31.575975] Allocated by task 214: [ 31.576400] kasan_save_stack+0x22/0x50 [ 31.576912] kasan_set_track+0x25/0x30 [ 31.577413] __kasan_slab_alloc+0x59/0x70 [ 31.577923] kmem_cache_alloc+0x16b/0x370 [ 31.578429] vm_area_dup+0x20/0x160 [ 31.578865] __split_vma+0x170/0x950 [ 31.579315] split_vma+0xc6/0x110 [ 31.579746] mprotect_fixup+0x8d2/0xb30 [ 31.580252] do_mprotect_pkey+0x87e/0xd40 [ 31.580773] __x64_sys_mprotect+0x78/0xc0 [ 31.581294] do_syscall_64+0x3f/0x90 [ 31.581770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.582415] [ 31.582632] Freed by task 214: [ 31.583022] kasan_save_stack+0x22/0x50 [ 31.583530] kasan_set_track+0x25/0x30 [ 31.584018] kasan_save_free_info+0x2b/0x50 [ 31.584596] __kasan_slab_free+0x10a/0x190 [ 31.585145] kmem_cache_free+0x10d/0x4d0 [ 31.585656] rcu_core+0x8c8/0x2860 [ 31.586101] __do_softirq+0x1b7/0x7d4 [ 31.586586] [ 31.586802] Last potentially related work creation: [ 31.587386] kasan_save_stack+0x22/0x50 [ 31.587946] __kasan_record_aux_stack+0x8e/0xa0 [ 31.588503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.589162] remove_vma+0x139/0x170 [ 31.589609] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.590169] do_vmi_munmap+0x1f1/0x2b0 [ 31.590650] __vm_munmap+0x138/0x3a0 [ 31.591122] __x64_sys_munmap+0x59/0x80 [ 31.591619] do_syscall_64+0x3f/0x90 [ 31.592096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.592743] [ 31.592958] The buggy address belongs to the object at ffff88800dfbb740 [ 31.592958] which belongs to the cache vm_area_struct of size 168 [ 31.594444] The buggy address is located 88 bytes inside of [ 31.594444] freed 168-byte region [ffff88800dfbb740, ffff88800dfbb7e8) [ 31.595855] [ 31.596069] The buggy address belongs to the physical page: [ 31.596734] page:00000000d91f52b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfbb [ 31.597830] memcg:ffff888009403d01 [ 31.598258] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.598904] page_type: 0xffffffff() [ 31.599491] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.600444] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009403d01 [ 31.601407] page dumped because: kasan: bad access detected [ 31.602102] [ 31.602320] Memory state around the buggy address: [ 31.602917] ffff88800dfbb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.603800] ffff88800dfbb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.604683] >ffff88800dfbb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.605607] ^ [ 31.606113] ffff88800dfbb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.607003] ffff88800dfbb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.607881] ================================================================== [ 31.608998] Disabling lock debugging due to kernel taint [ 33.475279] BUG: Bad rss-counter state mm:000000002f035387 type:MM_FILEPAGES val:33 [ 33.476048] BUG: Bad rss-counter state mm:000000002f035387 type:MM_ANONPAGES val:22 [ 33.888447] BUG: Bad rss-counter state mm:000000008118c0ad type:MM_FILEPAGES val:33 [ 33.889197] BUG: Bad rss-counter state mm:000000008118c0ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60955' (ECDSA) to the list of known hosts. 2023/06/20 17:43:28 fuzzer started 2023/06/20 17:43:28 dialing manager at localhost:36067 2023/06/20 17:43:28 checking machine... 2023/06/20 17:43:28 checking revisions... [ 34.686170] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:43:28 testing simple program... [ 34.743038] cgroup: Unknown subsys name 'net' [ 34.786055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:43:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81b2c73c RDX=0000000000000001 RSI=ffffffff8617e4b6 RDI=ffffffff85e2c438 RBP=ffff88806ce09af0 RSP=ffff88806ce099f0 R8 =ffffffff8617e4b6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000002c69d R12=ffffffff85e2c438 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc21 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 00007f14d9d8e700 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=00007fb84a8c90b0 CR3=00000000181e6000 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=2037323a33343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a33343a3731203032 XMM08=3d656e696c646d632022656369767265 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=00007f5098258310 CR3=000000000f292000 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=448d2d8c7aa6d98dda4b524c97bb4dc0 XMM02=000000000011b628eff9b2d0a8fce9cb XMM03=000000000011b6f82c67c8bc2e329bc3 XMM04=38aa754d293bda3c00000000000ae988 XMM05=e4cb8bb95a7664b600000000001322a0 XMM06=b7ae42c164244b2b0000000000131108 XMM07=e042d86d42eb936e00000000001226c0 XMM08=80f0d25009fc948d000000000011b6f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000