syzkaller login: [ 37.517309] BUG: Bad rss-counter state mm:0000000093f24268 type:MM_FILEPAGES val:33 [ 37.518966] BUG: Bad rss-counter state mm:0000000093f24268 type:MM_ANONPAGES val:22 [ 37.686673] ================================================================== [ 37.687598] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.688543] Read of size 8 at addr ffff88801bc48798 by task sshd/222 [ 37.689325] [ 37.689633] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.690486] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.691442] Call Trace: [ 37.691763] [ 37.692072] dump_stack_lvl+0x91/0xf0 [ 37.692557] print_report+0xcc/0x620 [ 37.693042] ? __virt_addr_valid+0x102/0x340 [ 37.693595] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.694208] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.694829] kasan_report+0xbe/0xf0 [ 37.695303] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.695931] vma_interval_tree_remove+0xc75/0xec0 [ 37.696540] vma_prepare+0xc54/0x11a0 [ 37.697024] __split_vma+0x5af/0x950 [ 37.697496] ? __pfx___split_vma+0x10/0x10 [ 37.698030] ? find_held_lock+0x2c/0x110 [ 37.698550] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.699114] ? lock_is_held_type+0x9f/0x120 [ 37.699656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.700294] ? mtree_range_walk+0x632/0x900 [ 37.700850] ? mas_walk+0x5c7/0x7c0 [ 37.701325] do_vmi_munmap+0x1f1/0x2b0 [ 37.701819] mmap_region+0x1f9/0x2660 [ 37.702305] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.702820] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.703532] ? __pfx_lock_acquire+0x10/0x10 [ 37.704082] ? __pfx_mmap_region+0x10/0x10 [ 37.704620] ? security_mmap_addr+0x7d/0xa0 [ 37.705157] ? get_unmapped_area+0x1f5/0x3f0 [ 37.705710] do_mmap+0x854/0xf00 [ 37.706148] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.706645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.707207] ksys_mmap_pgoff+0x3af/0x500 [ 37.707716] do_syscall_64+0x3f/0x90 [ 37.708204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.708859] RIP: 0033:0x7fabad89dd82 [ 37.709316] 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 [ 37.711445] RSP: 002b:00007ffe9c02c5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.712388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabad89dd82 [ 37.713235] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabaccd7000 [ 37.714084] RBP: 00007fabaccd7000 R08: 0000000000000009 R09: 0000000000001000 [ 37.714931] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580d6e7cec0 [ 37.715777] R13: 00007ffe9c02c610 R14: 00007ffe9c02c640 R15: 00007ffe9c02c9a0 [ 37.716645] [ 37.716943] [ 37.717160] Allocated by task 215: [ 37.717591] kasan_save_stack+0x22/0x50 [ 37.718094] kasan_set_track+0x25/0x30 [ 37.718588] __kasan_slab_alloc+0x59/0x70 [ 37.719111] kmem_cache_alloc+0x16b/0x370 [ 37.719632] vm_area_dup+0x20/0x160 [ 37.720111] __split_vma+0x170/0x950 [ 37.720578] split_vma+0xc6/0x110 [ 37.721017] mprotect_fixup+0x8d2/0xb30 [ 37.721521] do_mprotect_pkey+0x87e/0xd40 [ 37.722044] __x64_sys_mprotect+0x78/0xc0 [ 37.722568] do_syscall_64+0x3f/0x90 [ 37.723045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.723688] [ 37.723911] Freed by task 215: [ 37.724312] kasan_save_stack+0x22/0x50 [ 37.724827] kasan_set_track+0x25/0x30 [ 37.725318] kasan_save_free_info+0x2b/0x50 [ 37.725862] __kasan_slab_free+0x10a/0x190 [ 37.726416] kmem_cache_free+0x10d/0x4d0 [ 37.726922] rcu_core+0x8c8/0x2860 [ 37.727370] __do_softirq+0x1b7/0x7d4 [ 37.727868] [ 37.728085] Last potentially related work creation: [ 37.728671] kasan_save_stack+0x22/0x50 [ 37.729173] __kasan_record_aux_stack+0x8e/0xa0 [ 37.729749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.730387] remove_vma+0x139/0x170 [ 37.730840] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.731403] do_vmi_munmap+0x1f1/0x2b0 [ 37.731894] __vm_munmap+0x138/0x3a0 [ 37.732361] __x64_sys_munmap+0x59/0x80 [ 37.732851] do_syscall_64+0x3f/0x90 [ 37.733327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.733965] [ 37.734185] The buggy address belongs to the object at ffff88801bc48740 [ 37.734185] which belongs to the cache vm_area_struct of size 168 [ 37.735670] The buggy address is located 88 bytes inside of [ 37.735670] freed 168-byte region [ffff88801bc48740, ffff88801bc487e8) [ 37.737071] [ 37.737285] The buggy address belongs to the physical page: [ 37.737946] page:00000000b12aeb1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc48 [ 37.739043] memcg:ffff888016c76401 [ 37.739469] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.740141] page_type: 0xffffffff() [ 37.740603] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.741527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c76401 [ 37.742433] page dumped because: kasan: bad access detected [ 37.743096] [ 37.743310] Memory state around the buggy address: [ 37.743901] ffff88801bc48680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.744798] ffff88801bc48700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.745698] >ffff88801bc48780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.746599] ^ [ 37.747126] ffff88801bc48800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.747995] ffff88801bc48880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.748850] ================================================================== [ 37.749841] Disabling lock debugging due to kernel taint [ 39.631553] BUG: Bad rss-counter state mm:0000000083e7e5b4 type:MM_FILEPAGES val:33 [ 39.632627] BUG: Bad rss-counter state mm:0000000083e7e5b4 type:MM_ANONPAGES val:22 [ 40.105264] BUG: Bad rss-counter state mm:00000000b42cd85d type:MM_FILEPAGES val:33 [ 40.106347] BUG: Bad rss-counter state mm:00000000b42cd85d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19700' (ECDSA) to the list of known hosts. 2023/06/20 06:25:50 fuzzer started 2023/06/20 06:25:50 dialing manager at localhost:44161 2023/06/20 06:25:50 checking machine... 2023/06/20 06:25:50 checking revisions... [ 40.850672] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:25:50 testing simple program... [ 40.900008] cgroup: Unknown subsys name 'net' [ 40.968977] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:25:43 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff888009e10b80 RCX=1ffff110013c2208 RDX=1ffff110013c21b6 RSI=0000000000000004 RDI=ffff88800f627aa8 RBP=1ffff11001ec4f76 RSP=ffff88800f627b38 R8 =0000000000000001 R9 =ffffed1001ec4f55 R10=0000000000000003 R11=0000000000000000 R12=ffff888009e10d98 R13=0000000000000000 R14=ffff888009e10000 R15=ffff888009e10b80 RIP=ffffffff8302db92 RFL=00000046 [---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 0000000000000000 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=00007ffc446c18c8 CR3=0000000005482000 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=00007faee2515510000055cf1f9d0790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff819766b9 RCX=0000000000000001 RDX=1ffff11002bb7ed1 RSI=ffff888015dbf9d8 RDI=ffffffff819766b9 RBP=ffffffff819766b9 RSP=ffff888015dbf5e0 R8 =0000000000000001 R9 =ffff888015dbf670 R10=0000000000038001 R11=0000000000025fbc R12=0000000000000001 R13=0000000000000000 R14=ffff8880146ad1c0 R15=ffff8880169ab390 RIP=ffffffff811fc772 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 00007ffa9e7e7700 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=00007fd3da5905b0 CR3=000000000e1b4000 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=2039343a35323a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a35323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000