syzkaller login: [ 28.998793] BUG: Bad rss-counter state mm:0000000058f1ff00 type:MM_FILEPAGES val:33 [ 28.999937] BUG: Bad rss-counter state mm:0000000058f1ff00 type:MM_ANONPAGES val:22 [ 29.099039] ================================================================== [ 29.099671] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.100320] Read of size 8 at addr ffff88800f00c310 by task sshd/219 [ 29.100852] [ 29.101007] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.101604] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.102278] Call Trace: [ 29.102502] [ 29.102702] dump_stack_lvl+0x91/0xf0 [ 29.103045] print_report+0xcc/0x620 [ 29.103385] ? __virt_addr_valid+0x102/0x340 [ 29.103781] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.104211] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.104642] kasan_report+0xbe/0xf0 [ 29.104977] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.105410] vma_interval_tree_remove+0xc75/0xec0 [ 29.105831] vma_prepare+0xc54/0x11a0 [ 29.106167] __split_vma+0x5af/0x950 [ 29.106498] ? __pfx___split_vma+0x10/0x10 [ 29.106869] ? find_held_lock+0x2c/0x110 [ 29.107234] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.107647] ? lock_is_held_type+0x9f/0x120 [ 29.108027] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.108451] ? mtree_range_walk+0x632/0x900 [ 29.108798] ? mas_walk+0x5c7/0x7c0 [ 29.109046] do_vmi_munmap+0x1f1/0x2b0 [ 29.109303] mmap_region+0x1f9/0x2660 [ 29.109556] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.109829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.110199] ? __pfx_lock_acquire+0x10/0x10 [ 29.110478] ? __pfx_mmap_region+0x10/0x10 [ 29.110755] ? security_mmap_addr+0x7d/0xa0 [ 29.111078] ? get_unmapped_area+0x1f5/0x3f0 [ 29.111364] do_mmap+0x854/0xf00 [ 29.111594] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.111858] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.112152] ksys_mmap_pgoff+0x3af/0x500 [ 29.112417] do_syscall_64+0x3f/0x90 [ 29.112668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.113010] RIP: 0033:0x7f7b1fb70d82 [ 29.113248] 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 [ 29.114341] RSP: 002b:00007fff3303c108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.114814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b1fb70d82 [ 29.115254] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b1efaa000 [ 29.115700] RBP: 00007f7b1efaa000 R08: 0000000000000009 R09: 0000000000001000 [ 29.116142] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1dfae9f70 [ 29.116581] R13: 00007fff3303c120 R14: 00007fff3303c150 R15: 00007fff3303c4b0 [ 29.117026] [ 29.117179] [ 29.117293] Allocated by task 212: [ 29.117518] kasan_save_stack+0x22/0x50 [ 29.117783] kasan_set_track+0x25/0x30 [ 29.118040] __kasan_slab_alloc+0x59/0x70 [ 29.118314] kmem_cache_alloc+0x16b/0x370 [ 29.118584] vm_area_dup+0x20/0x160 [ 29.118827] __split_vma+0x170/0x950 [ 29.119070] split_vma+0xc6/0x110 [ 29.119300] mprotect_fixup+0x8d2/0xb30 [ 29.119561] do_mprotect_pkey+0x87e/0xd40 [ 29.119844] __x64_sys_mprotect+0x78/0xc0 [ 29.120117] do_syscall_64+0x3f/0x90 [ 29.120365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.120702] [ 29.120818] Freed by task 212: [ 29.121023] kasan_save_stack+0x22/0x50 [ 29.121286] kasan_set_track+0x25/0x30 [ 29.121544] kasan_save_free_info+0x2b/0x50 [ 29.121826] __kasan_slab_free+0x10a/0x190 [ 29.122104] kmem_cache_free+0x10d/0x4d0 [ 29.122369] rcu_core+0x8c8/0x2860 [ 29.122601] __do_softirq+0x1b7/0x7d4 [ 29.122852] [ 29.122964] Last potentially related work creation: [ 29.123265] kasan_save_stack+0x22/0x50 [ 29.123526] __kasan_record_aux_stack+0x8e/0xa0 [ 29.123827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.124159] remove_vma+0x139/0x170 [ 29.124394] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.124682] do_vmi_munmap+0x1f1/0x2b0 [ 29.124934] __vm_munmap+0x138/0x3a0 [ 29.125176] __x64_sys_munmap+0x59/0x80 [ 29.125433] do_syscall_64+0x3f/0x90 [ 29.125678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.126014] [ 29.126127] Second to last potentially related work creation: [ 29.126479] kasan_save_stack+0x22/0x50 [ 29.126739] __kasan_record_aux_stack+0x8e/0xa0 [ 29.127036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.127368] remove_vma+0x139/0x170 [ 29.127602] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.127901] do_vmi_munmap+0x1f1/0x2b0 [ 29.128153] mmap_region+0x1f9/0x2660 [ 29.128400] do_mmap+0x854/0xf00 [ 29.128625] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.128878] ksys_mmap_pgoff+0x3af/0x500 [ 29.129137] do_syscall_64+0x3f/0x90 [ 29.129382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.129713] [ 29.129825] The buggy address belongs to the object at ffff88800f00c2b8 [ 29.129825] which belongs to the cache vm_area_struct of size 168 [ 29.130573] The buggy address is located 88 bytes inside of [ 29.130573] freed 168-byte region [ffff88800f00c2b8, ffff88800f00c360) [ 29.131290] [ 29.131403] The buggy address belongs to the physical page: [ 29.131745] page:00000000b2fa83bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf00c [ 29.132299] memcg:ffff88800edf6f01 [ 29.132519] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.132851] page_type: 0xffffffff() [ 29.133085] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 29.133558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf6f01 [ 29.134022] page dumped because: kasan: bad access detected [ 29.134363] [ 29.134476] Memory state around the buggy address: [ 29.134780] ffff88800f00c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.135219] ffff88800f00c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.135663] >ffff88800f00c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.136100] ^ [ 29.136342] ffff88800f00c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.136783] ffff88800f00c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.137220] ================================================================== [ 29.137896] Disabling lock debugging due to kernel taint [ 31.453200] BUG: Bad rss-counter state mm:00000000a9f3cc48 type:MM_FILEPAGES val:33 [ 31.454405] BUG: Bad rss-counter state mm:00000000a9f3cc48 type:MM_ANONPAGES val:22 [ 31.935170] BUG: Bad rss-counter state mm:0000000072be2d2c type:MM_FILEPAGES val:33 [ 31.936373] BUG: Bad rss-counter state mm:0000000072be2d2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16930' (ECDSA) to the list of known hosts. 2023/06/20 05:18:12 fuzzer started 2023/06/20 05:18:12 dialing manager at localhost:44161 2023/06/20 05:18:12 checking machine... 2023/06/20 05:18:12 checking revisions... [ 32.633596] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:18:12 testing simple program... [ 32.684508] cgroup: Unknown subsys name 'net' [ 32.736807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:18:11 Registers: info registers vcpu 0 RAX=0000607f92e11b40 RBX=ffff888019fcc000 RCX=0000000000000000 RDX=ffffffff81825f00 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=dffffc0000000000 RSP=ffff888015bffc68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800e54b480 R13=ffff88800b5cd700 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff81825f48 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 00007f9566107900 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=00007f95666bf0b0 CR3=0000000010022000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fe5b2c2d180 CR3=000000000f68a000 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=10134e4ecee7cf89b243e1ac36648ccb XMM02=000000000011da58ec2efd57dc4c00df XMM03=0000000000123fd8d942810aeb9ed237 XMM04=ba8a056562f17f7500000000000ae988 XMM05=19e9129bd510f23500000000001356e8 XMM06=9965b683c940d5860000000000134530 XMM07=e042d86d42eb936e00000000001242b0 XMM08=d942810aeb9ed237000000000011dab8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000