[ 30.738890] BUG: Bad rss-counter state mm:00000000d58fcbc4 type:MM_FILEPAGES val:33 [ 30.740054] BUG: Bad rss-counter state mm:00000000d58fcbc4 type:MM_ANONPAGES val:22 [ 30.780983] ================================================================== [ 30.782023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.783015] Read of size 8 at addr ffff88801818f968 by task sshd/220 [ 30.783882] [ 30.784182] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.785088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.786127] Call Trace: [ 30.786464] [ 30.786764] dump_stack_lvl+0x91/0xf0 [ 30.787281] print_report+0xcc/0x620 [ 30.787787] ? __virt_addr_valid+0x102/0x340 [ 30.788368] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.789013] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.789668] kasan_report+0xbe/0xf0 [ 30.790170] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.790827] vma_interval_tree_remove+0xc75/0xec0 [ 30.791467] vma_prepare+0xc54/0x11a0 [ 30.791973] __split_vma+0x5af/0x950 [ 30.792476] ? __pfx___split_vma+0x10/0x10 [ 30.793037] ? find_held_lock+0x2c/0x110 [ 30.793613] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.794212] ? lock_is_held_type+0x9f/0x120 [ 30.794781] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.795424] ? mtree_range_walk+0x632/0x900 [ 30.796008] ? mas_walk+0x5c7/0x7c0 [ 30.796510] do_vmi_munmap+0x1f1/0x2b0 [ 30.797033] mmap_region+0x1f9/0x2660 [ 30.797556] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.798098] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.798854] ? __pfx_lock_acquire+0x10/0x10 [ 30.799419] ? __pfx_mmap_region+0x10/0x10 [ 30.799983] ? security_mmap_addr+0x7d/0xa0 [ 30.800549] ? get_unmapped_area+0x1f5/0x3f0 [ 30.801131] do_mmap+0x854/0xf00 [ 30.801605] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.802129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.802728] ksys_mmap_pgoff+0x3af/0x500 [ 30.803268] do_syscall_64+0x3f/0x90 [ 30.803772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804455] RIP: 0033:0x7f2cb4dbcd82 [ 30.804934] 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 [ 30.807193] RSP: 002b:00007ffcf8905cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.808152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2cb4dbcd82 [ 30.809047] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2cb41f6000 [ 30.809944] RBP: 00007f2cb41f6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.810843] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634a8b66ec0 [ 30.811739] R13: 00007ffcf8905ce0 R14: 00007ffcf8905d10 R15: 00007ffcf8906070 [ 30.812641] [ 30.812949] [ 30.813177] Allocated by task 210: [ 30.813648] kasan_save_stack+0x22/0x50 [ 30.814182] kasan_set_track+0x25/0x30 [ 30.814704] __kasan_slab_alloc+0x59/0x70 [ 30.815260] kmem_cache_alloc+0x16b/0x370 [ 30.815810] vm_area_dup+0x20/0x160 [ 30.816293] __split_vma+0x170/0x950 [ 30.816790] split_vma+0xc6/0x110 [ 30.817255] mprotect_fixup+0x8d2/0xb30 [ 30.817797] do_mprotect_pkey+0x87e/0xd40 [ 30.818352] __x64_sys_mprotect+0x78/0xc0 [ 30.818904] do_syscall_64+0x3f/0x90 [ 30.819406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820083] [ 30.820312] Freed by task 13: [ 30.820720] kasan_save_stack+0x22/0x50 [ 30.821251] kasan_set_track+0x25/0x30 [ 30.821781] kasan_save_free_info+0x2b/0x50 [ 30.822348] __kasan_slab_free+0x10a/0x190 [ 30.822917] kmem_cache_free+0x10d/0x4d0 [ 30.823463] rcu_core+0x8c8/0x2860 [ 30.823935] __do_softirq+0x1b7/0x7d4 [ 30.824440] [ 30.824670] Last potentially related work creation: [ 30.825290] kasan_save_stack+0x22/0x50 [ 30.825838] __kasan_record_aux_stack+0x8e/0xa0 [ 30.826450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.827131] remove_vma+0x139/0x170 [ 30.827610] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.828200] do_vmi_munmap+0x1f1/0x2b0 [ 30.828716] __vm_munmap+0x138/0x3a0 [ 30.829213] __x64_sys_munmap+0x59/0x80 [ 30.829747] do_syscall_64+0x3f/0x90 [ 30.830247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.830924] [ 30.831153] Second to last potentially related work creation: [ 30.831879] kasan_save_stack+0x22/0x50 [ 30.832417] __kasan_record_aux_stack+0x8e/0xa0 [ 30.833025] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.833725] remove_vma+0x139/0x170 [ 30.834203] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.834799] do_vmi_munmap+0x1f1/0x2b0 [ 30.835313] mmap_region+0x1f9/0x2660 [ 30.835818] do_mmap+0x854/0xf00 [ 30.836274] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.836791] ksys_mmap_pgoff+0x3af/0x500 [ 30.837320] do_syscall_64+0x3f/0x90 [ 30.837841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838519] [ 30.838747] The buggy address belongs to the object at ffff88801818f910 [ 30.838747] which belongs to the cache vm_area_struct of size 168 [ 30.840304] The buggy address is located 88 bytes inside of [ 30.840304] freed 168-byte region [ffff88801818f910, ffff88801818f9b8) [ 30.841805] [ 30.842035] The buggy address belongs to the physical page: [ 30.842734] page:00000000a0374b42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1818f [ 30.843890] memcg:ffff88800d449301 [ 30.844342] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.845021] page_type: 0xffffffff() [ 30.845506] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.846482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d449301 [ 30.847439] page dumped because: kasan: bad access detected [ 30.848138] [ 30.848372] Memory state around the buggy address: [ 30.848985] ffff88801818f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.849897] ffff88801818f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.850802] >ffff88801818f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.851702] ^ [ 30.852522] ffff88801818f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.853443] ffff88801818fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.854353] ================================================================== [ 30.855644] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.937985] BUG: Bad rss-counter state mm:00000000c39699ff type:MM_FILEPAGES val:33 [ 32.939099] BUG: Bad rss-counter state mm:00000000c39699ff type:MM_ANONPAGES val:22 [ 33.524593] BUG: Bad rss-counter state mm:000000005277219d type:MM_FILEPAGES val:33 [ 33.525797] BUG: Bad rss-counter state mm:000000005277219d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53702' (ECDSA) to the list of known hosts. 2023/06/19 18:39:18 fuzzer started 2023/06/19 18:39:19 dialing manager at localhost:44161 2023/06/19 18:39:19 checking machine... 2023/06/19 18:39:19 checking revisions... [ 34.156091] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:39:19 testing simple program... [ 34.208811] cgroup: Unknown subsys name 'net' [ 34.297853] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:39:12 Registers: info registers vcpu 0 RAX=1ffffffff0bbf943 RBX=ffffffff85dfca1c RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff888008d7f878 R8 =ffffffff86137508 R9 =ffff888008d7f970 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-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 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=00007f86f1636650 CR3=000000000e352000 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=2038313a39333a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a39333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002866f38 RSP=ffff8880143379a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81f595b4 R14=ffff888010250008 R15=dffffc0000000000 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007f86f1081900 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=00007f86f1638618 CR3=000000000cb9e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000