[ 28.495962] BUG: Bad rss-counter state mm:00000000776d6fc6 type:MM_FILEPAGES val:33 [ 28.497339] BUG: Bad rss-counter state mm:00000000776d6fc6 type:MM_ANONPAGES val:22 [ 28.669173] ================================================================== [ 28.670260] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.671362] Read of size 8 at addr ffff88800d9423f8 by task sshd/220 [ 28.672346] [ 28.672602] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.673619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.674799] Call Trace: [ 28.675163] [ 28.675492] dump_stack_lvl+0x91/0xf0 [ 28.676052] print_report+0xcc/0x620 [ 28.676608] ? __virt_addr_valid+0x102/0x340 [ 28.677248] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.677966] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.678704] kasan_report+0xbe/0xf0 [ 28.679274] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.679996] vma_interval_tree_remove+0xc75/0xec0 [ 28.680682] vma_prepare+0xc54/0x11a0 [ 28.681245] __split_vma+0x5af/0x950 [ 28.681822] ? __pfx___split_vma+0x10/0x10 [ 28.682433] ? find_held_lock+0x2c/0x110 [ 28.683040] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.683701] ? lock_is_held_type+0x9f/0x120 [ 28.684358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.685101] ? mtree_range_walk+0x632/0x900 [ 28.685785] ? mas_walk+0x5c7/0x7c0 [ 28.686348] do_vmi_munmap+0x1f1/0x2b0 [ 28.686937] mmap_region+0x1f9/0x2660 [ 28.687524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.688149] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.689003] ? __pfx_lock_acquire+0x10/0x10 [ 28.689654] ? __pfx_mmap_region+0x10/0x10 [ 28.690310] ? security_mmap_addr+0x7d/0xa0 [ 28.690935] ? get_unmapped_area+0x1f5/0x3f0 [ 28.691490] do_mmap+0x854/0xf00 [ 28.691931] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.692433] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.692996] ksys_mmap_pgoff+0x3af/0x500 [ 28.693530] do_syscall_64+0x3f/0x90 [ 28.694012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.694656] RIP: 0033:0x7f884f2cbd82 [ 28.695115] 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 [ 28.697250] RSP: 002b:00007ffe44fcc1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.698180] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f884f2cbd82 [ 28.699035] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f884e705000 [ 28.699899] RBP: 00007f884e705000 R08: 0000000000000009 R09: 0000000000001000 [ 28.700916] R10: 0000000000000812 R11: 0000000000000206 R12: 000056540c27dec0 [ 28.701939] R13: 00007ffe44fcc200 R14: 00007ffe44fcc230 R15: 00007ffe44fcc590 [ 28.702982] [ 28.703330] [ 28.703585] Allocated by task 213: [ 28.704096] kasan_save_stack+0x22/0x50 [ 28.704704] kasan_set_track+0x25/0x30 [ 28.705306] __kasan_slab_alloc+0x59/0x70 [ 28.705966] kmem_cache_alloc+0x16b/0x370 [ 28.706582] vm_area_dup+0x20/0x160 [ 28.707135] __split_vma+0x170/0x950 [ 28.707698] split_vma+0xc6/0x110 [ 28.708164] mprotect_fixup+0x8d2/0xb30 [ 28.708665] do_mprotect_pkey+0x87e/0xd40 [ 28.709180] __x64_sys_mprotect+0x78/0xc0 [ 28.709706] do_syscall_64+0x3f/0x90 [ 28.710180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.710816] [ 28.711032] Freed by task 213: [ 28.711422] kasan_save_stack+0x22/0x50 [ 28.711919] kasan_set_track+0x25/0x30 [ 28.712402] kasan_save_free_info+0x2b/0x50 [ 28.712923] __kasan_slab_free+0x10a/0x190 [ 28.713453] kmem_cache_free+0x10d/0x4d0 [ 28.713982] rcu_core+0x8c8/0x2860 [ 28.714419] __do_softirq+0x1b7/0x7d4 [ 28.714886] [ 28.715099] Last potentially related work creation: [ 28.715679] kasan_save_stack+0x22/0x50 [ 28.716203] __kasan_record_aux_stack+0x8e/0xa0 [ 28.716789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.717429] remove_vma+0x139/0x170 [ 28.717893] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.718446] do_vmi_munmap+0x1f1/0x2b0 [ 28.718933] __vm_munmap+0x138/0x3a0 [ 28.719395] __x64_sys_munmap+0x59/0x80 [ 28.719887] do_syscall_64+0x3f/0x90 [ 28.720360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.720996] [ 28.721210] Second to last potentially related work creation: [ 28.721905] kasan_save_stack+0x22/0x50 [ 28.722403] __kasan_record_aux_stack+0x8e/0xa0 [ 28.722971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.723599] remove_vma+0x139/0x170 [ 28.724047] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.724604] do_vmi_munmap+0x1f1/0x2b0 [ 28.725091] mmap_region+0x1f9/0x2660 [ 28.725580] do_mmap+0x854/0xf00 [ 28.726008] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.726499] ksys_mmap_pgoff+0x3af/0x500 [ 28.727006] do_syscall_64+0x3f/0x90 [ 28.727474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.728115] [ 28.728327] The buggy address belongs to the object at ffff88800d9423a0 [ 28.728327] which belongs to the cache vm_area_struct of size 168 [ 28.729813] The buggy address is located 88 bytes inside of [ 28.729813] freed 168-byte region [ffff88800d9423a0, ffff88800d942448) [ 28.731228] [ 28.731448] The buggy address belongs to the physical page: [ 28.732122] page:0000000082a245cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd942 [ 28.733215] memcg:ffff88800d88db01 [ 28.733658] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.734340] page_type: 0xffffffff() [ 28.734762] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 28.735654] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d88db01 [ 28.736560] page dumped because: kasan: bad access detected [ 28.737230] [ 28.737443] Memory state around the buggy address: [ 28.738033] ffff88800d942280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 28.738890] ffff88800d942300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 28.739758] >ffff88800d942380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.740611] ^ [ 28.741450] ffff88800d942400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.742321] ffff88800d942480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.743176] ================================================================== [ 28.744259] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.419857] BUG: Bad rss-counter state mm:000000001583e533 type:MM_FILEPAGES val:33 [ 30.420560] BUG: Bad rss-counter state mm:000000001583e533 type:MM_ANONPAGES val:22 [ 30.965053] BUG: Bad rss-counter state mm:00000000fbd5a197 type:MM_FILEPAGES val:33 [ 30.966192] BUG: Bad rss-counter state mm:00000000fbd5a197 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61440' (ECDSA) to the list of known hosts. 2023/06/19 20:35:53 fuzzer started 2023/06/19 20:35:53 dialing manager at localhost:44161 2023/06/19 20:35:53 checking machine... 2023/06/19 20:35:53 checking revisions... [ 31.609589] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:35:54 testing simple program... [ 31.659118] cgroup: Unknown subsys name 'net' [ 31.702128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:35:49 Registers: info registers vcpu 0 RAX=ffff888019f68788 RBX=0000000000000000 RCX=1ffff11001d3f73f RDX=dffffc0000000000 RSI=ffffffff87b86f80 RDI=ffff88800e9fb9f8 RBP=ffff888019f1e720 RSP=ffff88806ce09dc8 R8 =0000000000000001 R9 =ffffed100d9c13b1 R10=0000000000000003 R11=0000000000000128 R12=0000000000000283 R13=ffff888019f1e788 R14=ffff88800e9fb9e8 R15=ffffffff87b86f80 RIP=ffffffff844cc243 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=0000557d9d5f1748 CR3=000000000d786000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=af9e4dd7886ac27100000000000ae988 XMM05=ca6e7f85a695720a0000000000135698 XMM06=325820a3c1c5cb7f0000000000134100 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85dfc6a8 RCX=ffffffff8180995c RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a8 RSP=ffff888008e578c0 R8 =ffffffff86137004 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 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=000055ee842c9f40 CR3=000000000fff8000 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=ffffffffff0000000000000000000000 XMM01=000000000074656b636f732e73756264 XMM02=00030022200000010100000000000000 XMM03=66356334393133633437353862373134 XMM04=2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e XMM05=000055ee8432dee0000055ee8435f5a0 XMM06=00000000000000210000000000307300 XMM07=00000000000000000000000000000000 XMM08=746c75616665640073646e6f63657300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000