syzkaller login: [ 34.656820] BUG: Bad rss-counter state mm:0000000014a8ec68 type:MM_FILEPAGES val:33 [ 34.657993] BUG: Bad rss-counter state mm:0000000014a8ec68 type:MM_ANONPAGES val:22 [ 34.698152] ================================================================== [ 34.699164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.700316] Read of size 8 at addr ffff88801a36eed8 by task sshd/220 [ 34.701425] [ 34.701698] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.702818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.704113] Call Trace: [ 34.704506] [ 34.704884] dump_stack_lvl+0x91/0xf0 [ 34.705549] print_report+0xcc/0x620 [ 34.706176] ? __virt_addr_valid+0x102/0x340 [ 34.706928] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.707669] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.708493] kasan_report+0xbe/0xf0 [ 34.709058] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.709782] vma_interval_tree_remove+0xc75/0xec0 [ 34.710522] vma_prepare+0xc54/0x11a0 [ 34.711074] __split_vma+0x5af/0x950 [ 34.711545] ? __pfx___split_vma+0x10/0x10 [ 34.712068] ? find_held_lock+0x2c/0x110 [ 34.712590] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.713149] ? lock_is_held_type+0x9f/0x120 [ 34.713691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.714295] ? mtree_range_walk+0x632/0x900 [ 34.714856] ? mas_walk+0x5c7/0x7c0 [ 34.715328] do_vmi_munmap+0x1f1/0x2b0 [ 34.715822] mmap_region+0x1f9/0x2660 [ 34.716300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.716806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.717511] ? __pfx_lock_acquire+0x10/0x10 [ 34.718050] ? __pfx_mmap_region+0x10/0x10 [ 34.718595] ? security_mmap_addr+0x7d/0xa0 [ 34.719131] ? get_unmapped_area+0x1f5/0x3f0 [ 34.719681] do_mmap+0x854/0xf00 [ 34.720118] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.720610] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.721178] ksys_mmap_pgoff+0x3af/0x500 [ 34.721689] do_syscall_64+0x3f/0x90 [ 34.722172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.722836] RIP: 0033:0x7f08efc9ed82 [ 34.723295] 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 [ 34.725376] RSP: 002b:00007ffcb89fbea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.726283] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08efc9ed82 [ 34.727133] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08ef0d8000 [ 34.727966] RBP: 00007f08ef0d8000 R08: 0000000000000009 R09: 0000000000001000 [ 34.728806] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577c672bd90 [ 34.729649] R13: 00007ffcb89fbec0 R14: 00007ffcb89fbef0 R15: 00007ffcb89fc250 [ 34.730509] [ 34.730801] [ 34.731019] Allocated by task 213: [ 34.731445] kasan_save_stack+0x22/0x50 [ 34.731946] kasan_set_track+0x25/0x30 [ 34.732435] __kasan_slab_alloc+0x59/0x70 [ 34.732952] kmem_cache_alloc+0x16b/0x370 [ 34.733460] vm_area_dup+0x20/0x160 [ 34.733910] __split_vma+0x170/0x950 [ 34.734372] split_vma+0xc6/0x110 [ 34.734807] mprotect_fixup+0x8d2/0xb30 [ 34.735306] do_mprotect_pkey+0x87e/0xd40 [ 34.735820] __x64_sys_mprotect+0x78/0xc0 [ 34.736327] do_syscall_64+0x3f/0x90 [ 34.736791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.737434] [ 34.737651] Freed by task 13: [ 34.738035] kasan_save_stack+0x22/0x50 [ 34.738561] kasan_set_track+0x25/0x30 [ 34.739052] kasan_save_free_info+0x2b/0x50 [ 34.739590] __kasan_slab_free+0x10a/0x190 [ 34.740121] kmem_cache_free+0x10d/0x4d0 [ 34.740651] rcu_core+0x8c8/0x2860 [ 34.741093] __do_softirq+0x1b7/0x7d4 [ 34.741563] [ 34.741775] Last potentially related work creation: [ 34.742356] kasan_save_stack+0x22/0x50 [ 34.742881] __kasan_record_aux_stack+0x8e/0xa0 [ 34.743447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.744071] remove_vma+0x139/0x170 [ 34.744506] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.745054] do_vmi_munmap+0x1f1/0x2b0 [ 34.745535] __vm_munmap+0x138/0x3a0 [ 34.746008] __x64_sys_munmap+0x59/0x80 [ 34.746522] do_syscall_64+0x3f/0x90 [ 34.746996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.747625] [ 34.747838] The buggy address belongs to the object at ffff88801a36ee80 [ 34.747838] which belongs to the cache vm_area_struct of size 168 [ 34.749300] The buggy address is located 88 bytes inside of [ 34.749300] freed 168-byte region [ffff88801a36ee80, ffff88801a36ef28) [ 34.750706] [ 34.750920] The buggy address belongs to the physical page: [ 34.751577] page:000000000260f8fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a36e [ 34.752662] memcg:ffff88800c6c8001 [ 34.753082] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.753730] page_type: 0xffffffff() [ 34.754178] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.755124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6c8001 [ 34.756023] page dumped because: kasan: bad access detected [ 34.756682] [ 34.756895] Memory state around the buggy address: [ 34.757477] ffff88801a36ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.758323] ffff88801a36ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.759191] >ffff88801a36ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.760036] ^ [ 34.760770] ffff88801a36ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.761620] ffff88801a36ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.762483] ================================================================== [ 34.763426] Disabling lock debugging due to kernel taint [ 37.615689] BUG: Bad rss-counter state mm:00000000cbf4ff8f type:MM_FILEPAGES val:33 [ 37.616884] BUG: Bad rss-counter state mm:00000000cbf4ff8f type:MM_ANONPAGES val:22 [ 37.972500] BUG: Bad rss-counter state mm:000000002a21d11d type:MM_FILEPAGES val:33 [ 37.973498] BUG: Bad rss-counter state mm:000000002a21d11d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26392' (ECDSA) to the list of known hosts. 2023/06/19 20:47:55 fuzzer started 2023/06/19 20:47:55 dialing manager at localhost:44161 2023/06/19 20:47:55 checking machine... 2023/06/19 20:47:55 checking revisions... [ 38.689427] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:47:55 testing simple program... [ 38.735714] cgroup: Unknown subsys name 'net' [ 38.785732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:47:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffff88806ce09b10 RDX=1ffff1100d9c135a RSI=ffff88806ce09a40 RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce099b0 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab8 R15=ffff88806ce09a70 RIP=ffffffff81130682 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 00007f13d433f900 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=00007ffe8e79b000 CR3=000000000d8c2000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007faeb4641130 CR3=000000000eed4000 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=2034353a37343a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a37343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000