[ 42.141297] BUG: Bad rss-counter state mm:00000000ad9f4913 type:MM_FILEPAGES val:33 [ 42.142938] BUG: Bad rss-counter state mm:00000000ad9f4913 type:MM_ANONPAGES val:22 [ 42.310783] ================================================================== [ 42.311751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.312688] Read of size 8 at addr ffff88800eb02968 by task sshd/220 [ 42.313559] [ 42.313823] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.314685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.315654] Call Trace: [ 42.315973] <TASK> [ 42.316255] dump_stack_lvl+0x91/0xf0 [ 42.316750] print_report+0xcc/0x620 [ 42.317235] ? __virt_addr_valid+0x102/0x340 [ 42.317780] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.318396] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.319010] kasan_report+0xbe/0xf0 [ 42.319482] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.320102] vma_interval_tree_remove+0xc75/0xec0 [ 42.320725] vma_prepare+0xc54/0x11a0 [ 42.321218] __split_vma+0x5af/0x950 [ 42.321707] ? __pfx___split_vma+0x10/0x10 [ 42.322274] ? find_held_lock+0x2c/0x110 [ 42.322817] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.323405] ? lock_is_held_type+0x9f/0x120 [ 42.323961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.324592] ? mtree_range_walk+0x632/0x900 [ 42.325158] ? mas_walk+0x5c7/0x7c0 [ 42.325644] do_vmi_munmap+0x1f1/0x2b0 [ 42.326154] mmap_region+0x1f9/0x2660 [ 42.326666] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.327194] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.327931] ? __pfx_lock_acquire+0x10/0x10 [ 42.328472] ? __pfx_mmap_region+0x10/0x10 [ 42.329000] ? security_mmap_addr+0x7d/0xa0 [ 42.329530] ? get_unmapped_area+0x1f5/0x3f0 [ 42.330079] do_mmap+0x854/0xf00 [ 42.330535] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.331026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.331599] ksys_mmap_pgoff+0x3af/0x500 [ 42.332109] do_syscall_64+0x3f/0x90 [ 42.332590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.333234] RIP: 0033:0x7fd34fdd4d82 [ 42.333684] 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 [ 42.335816] RSP: 002b:00007ffcaacc6228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.336724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd34fdd4d82 [ 42.337576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd34f20e000 [ 42.338430] RBP: 00007fd34f20e000 R08: 0000000000000009 R09: 0000000000001000 [ 42.339281] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9374f0ec0 [ 42.340119] R13: 00007ffcaacc6240 R14: 00007ffcaacc6270 R15: 00007ffcaacc65d0 [ 42.340979] </TASK> [ 42.341271] [ 42.341484] Allocated by task 213: [ 42.341914] kasan_save_stack+0x22/0x50 [ 42.342442] kasan_set_track+0x25/0x30 [ 42.342938] __kasan_slab_alloc+0x59/0x70 [ 42.343460] kmem_cache_alloc+0x16b/0x370 [ 42.343977] vm_area_dup+0x20/0x160 [ 42.344434] __split_vma+0x170/0x950 [ 42.344894] split_vma+0xc6/0x110 [ 42.345339] mprotect_fixup+0x8d2/0xb30 [ 42.345836] do_mprotect_pkey+0x87e/0xd40 [ 42.346378] __x64_sys_mprotect+0x78/0xc0 [ 42.346909] do_syscall_64+0x3f/0x90 [ 42.347375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.348011] [ 42.348224] Freed by task 213: [ 42.348616] kasan_save_stack+0x22/0x50 [ 42.349116] kasan_set_track+0x25/0x30 [ 42.349608] kasan_save_free_info+0x2b/0x50 [ 42.350139] __kasan_slab_free+0x10a/0x190 [ 42.350690] kmem_cache_free+0x10d/0x4d0 [ 42.351192] rcu_core+0x8c8/0x2860 [ 42.351633] __do_softirq+0x1b7/0x7d4 [ 42.352105] [ 42.352322] Last potentially related work creation: [ 42.352906] kasan_save_stack+0x22/0x50 [ 42.353420] __kasan_record_aux_stack+0x8e/0xa0 [ 42.353991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.354696] remove_vma+0x139/0x170 [ 42.355161] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.355736] do_vmi_munmap+0x1f1/0x2b0 [ 42.356243] __vm_munmap+0x138/0x3a0 [ 42.356731] __x64_sys_munmap+0x59/0x80 [ 42.357237] do_syscall_64+0x3f/0x90 [ 42.357725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.358409] [ 42.358630] Second to last potentially related work creation: [ 42.359342] kasan_save_stack+0x22/0x50 [ 42.359866] __kasan_record_aux_stack+0x8e/0xa0 [ 42.360471] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.361141] remove_vma+0x139/0x170 [ 42.361614] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.362196] do_vmi_munmap+0x1f1/0x2b0 [ 42.362708] mmap_region+0x1f9/0x2660 [ 42.363209] do_mmap+0x854/0xf00 [ 42.363660] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.364167] ksys_mmap_pgoff+0x3af/0x500 [ 42.364696] do_syscall_64+0x3f/0x90 [ 42.365188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.365856] [ 42.366078] The buggy address belongs to the object at ffff88800eb02910 [ 42.366078] which belongs to the cache vm_area_struct of size 168 [ 42.367628] The buggy address is located 88 bytes inside of [ 42.367628] freed 168-byte region [ffff88800eb02910, ffff88800eb029b8) [ 42.369100] [ 42.369325] The buggy address belongs to the physical page: [ 42.370010] page:00000000db9d198c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb02 [ 42.371144] memcg:ffff88800ccf9401 [ 42.371595] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.372323] page_type: 0xffffffff() [ 42.372792] raw: 0100000000000200 ffff88800879fc80 ffffea00003a0dc0 0000000000000007 [ 42.373751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ccf9401 [ 42.374702] page dumped because: kasan: bad access detected [ 42.375384] [ 42.375605] Memory state around the buggy address: [ 42.376209] ffff88800eb02800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 42.377101] ffff88800eb02880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 42.377998] >ffff88800eb02900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.378903] ^ [ 42.379716] ffff88800eb02980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 42.380625] ffff88800eb02a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.381519] ================================================================== [ 42.382523] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.796883] BUG: Bad rss-counter state mm:00000000e15a0ba5 type:MM_FILEPAGES val:33 [ 44.798148] BUG: Bad rss-counter state mm:00000000e15a0ba5 type:MM_ANONPAGES val:22 [ 45.290540] BUG: Bad rss-counter state mm:0000000048cff8d0 type:MM_FILEPAGES val:33 [ 45.291706] BUG: Bad rss-counter state mm:0000000048cff8d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42391' (ECDSA) to the list of known hosts. 2023/06/19 12:11:23 fuzzer started 2023/06/19 12:11:23 dialing manager at localhost:44161 2023/06/19 12:11:23 checking machine... 2023/06/19 12:11:23 checking revisions... [ 45.928312] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:11:23 testing simple program... [ 45.981718] cgroup: Unknown subsys name 'net' [ 46.070522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:11:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f75715ed650 CR3=0000000009796000 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=2032323a31313a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a31313a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800ff679e8 RCX=0000000000000001 RDX=1ffff11001fecf3f RSI=ffff88800ff67d50 RDI=ffff88800ff679f8 RBP=ffff88800ff67d50 RSP=ffff88800ff67940 R8 =ffffffff86137dd6 R9 =ffff88800ff67a28 R10=0000000000038001 R11=0000000000020f00 R12=0000000000000008 R13=ffff88800ff60000 R14=ffff88800ff67d58 R15=ffff88800ff679e8 RIP=ffffffff81130468 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 00007f7571038900 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=00007f75715f00b0 CR3=000000000e49a000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000