[ 23.901372] BUG: Bad rss-counter state mm:00000000fe3d83a2 type:MM_FILEPAGES val:33 [ 23.902580] BUG: Bad rss-counter state mm:00000000fe3d83a2 type:MM_ANONPAGES val:22 [ 24.056981] ================================================================== [ 24.058019] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.059069] Read of size 8 at addr ffff88800d9143f8 by task sshd/219 [ 24.060046] [ 24.060292] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.061277] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.062357] Call Trace: [ 24.062718] <TASK> [ 24.063042] dump_stack_lvl+0x91/0xf0 [ 24.063589] print_report+0xcc/0x620 [ 24.064129] ? __virt_addr_valid+0x102/0x340 [ 24.064746] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.065449] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.066132] kasan_report+0xbe/0xf0 [ 24.066686] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.067418] vma_interval_tree_remove+0xc75/0xec0 [ 24.068130] vma_prepare+0xc54/0x11a0 [ 24.068691] __split_vma+0x5af/0x950 [ 24.069243] ? __pfx___split_vma+0x10/0x10 [ 24.069859] ? find_held_lock+0x2c/0x110 [ 24.070469] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.071124] ? lock_is_held_type+0x9f/0x120 [ 24.071748] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.072459] ? mtree_range_walk+0x632/0x900 [ 24.073112] ? mas_walk+0x5c7/0x7c0 [ 24.073654] do_vmi_munmap+0x1f1/0x2b0 [ 24.074220] mmap_region+0x1f9/0x2660 [ 24.074782] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.075372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.076197] ? __pfx_lock_acquire+0x10/0x10 [ 24.076816] ? __pfx_mmap_region+0x10/0x10 [ 24.077455] ? security_mmap_addr+0x7d/0xa0 [ 24.078079] ? get_unmapped_area+0x1f5/0x3f0 [ 24.078727] do_mmap+0x854/0xf00 [ 24.079248] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.079816] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.080455] ksys_mmap_pgoff+0x3af/0x500 [ 24.081066] do_syscall_64+0x3f/0x90 [ 24.081622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.082365] RIP: 0033:0x7fa24b3ead82 [ 24.082894] 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 [ 24.085384] RSP: 002b:00007ffde99cbf88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.086431] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa24b3ead82 [ 24.087407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa24a824000 [ 24.088394] RBP: 00007fa24a824000 R08: 0000000000000009 R09: 0000000000001000 [ 24.089387] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b90513f60 [ 24.090367] R13: 00007ffde99cbfa0 R14: 00007ffde99cbfd0 R15: 00007ffde99cc330 [ 24.091356] </TASK> [ 24.091690] [ 24.091936] Allocated by task 212: [ 24.092427] kasan_save_stack+0x22/0x50 [ 24.093019] kasan_set_track+0x25/0x30 [ 24.093588] __kasan_slab_alloc+0x59/0x70 [ 24.094193] kmem_cache_alloc+0x16b/0x370 [ 24.094785] vm_area_dup+0x20/0x160 [ 24.095308] __split_vma+0x170/0x950 [ 24.095840] split_vma+0xc6/0x110 [ 24.096347] mprotect_fixup+0x8d2/0xb30 [ 24.096946] do_mprotect_pkey+0x87e/0xd40 [ 24.097545] __x64_sys_mprotect+0x78/0xc0 [ 24.098150] do_syscall_64+0x3f/0x90 [ 24.098693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.099432] [ 24.099675] Freed by task 212: [ 24.100122] kasan_save_stack+0x22/0x50 [ 24.100687] kasan_set_track+0x25/0x30 [ 24.101263] kasan_save_free_info+0x2b/0x50 [ 24.101863] __kasan_slab_free+0x10a/0x190 [ 24.102473] kmem_cache_free+0x10d/0x4d0 [ 24.103044] rcu_core+0x8c8/0x2860 [ 24.103546] __do_softirq+0x1b7/0x7d4 [ 24.104091] [ 24.104337] Last potentially related work creation: [ 24.105114] kasan_save_stack+0x22/0x50 [ 24.105759] __kasan_record_aux_stack+0x8e/0xa0 [ 24.106508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.107338] remove_vma+0x139/0x170 [ 24.107900] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.108632] do_vmi_munmap+0x1f1/0x2b0 [ 24.109287] __vm_munmap+0x138/0x3a0 [ 24.109887] __x64_sys_munmap+0x59/0x80 [ 24.110535] do_syscall_64+0x3f/0x90 [ 24.111149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.111988] [ 24.112256] Second to last potentially related work creation: [ 24.113146] kasan_save_stack+0x22/0x50 [ 24.113805] __kasan_record_aux_stack+0x8e/0xa0 [ 24.114549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.115375] remove_vma+0x139/0x170 [ 24.115951] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.116653] do_vmi_munmap+0x1f1/0x2b0 [ 24.117303] mmap_region+0x1f9/0x2660 [ 24.117897] do_mmap+0x854/0xf00 [ 24.118470] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.119099] ksys_mmap_pgoff+0x3af/0x500 [ 24.119739] do_syscall_64+0x3f/0x90 [ 24.120358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.121197] [ 24.121447] The buggy address belongs to the object at ffff88800d9143a0 [ 24.121447] which belongs to the cache vm_area_struct of size 168 [ 24.122949] The buggy address is located 88 bytes inside of [ 24.122949] freed 168-byte region [ffff88800d9143a0, ffff88800d914448) [ 24.124382] [ 24.124596] The buggy address belongs to the physical page: [ 24.125288] page:00000000d52122cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd914 [ 24.126442] memcg:ffff88800e25a301 [ 24.126873] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.127541] page_type: 0xffffffff() [ 24.128016] raw: 0100000000000200 ffff8880087a0c80 ffffea000025dfc0 dead000000000004 [ 24.128976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e25a301 [ 24.129898] page dumped because: kasan: bad access detected [ 24.130602] [ 24.130824] Memory state around the buggy address: [ 24.131429] ffff88800d914280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.132316] ffff88800d914300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.133226] >ffff88800d914380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.134108] ^ [ 24.134969] ffff88800d914400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.135844] ffff88800d914480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.136716] ================================================================== [ 24.138023] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.125224] BUG: Bad rss-counter state mm:00000000c651e49c type:MM_FILEPAGES val:33 [ 26.126258] BUG: Bad rss-counter state mm:00000000c651e49c type:MM_ANONPAGES val:22 [ 26.670640] BUG: Bad rss-counter state mm:000000008fe532d6 type:MM_FILEPAGES val:33 [ 26.671814] BUG: Bad rss-counter state mm:000000008fe532d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37132' (ECDSA) to the list of known hosts. 2023/06/21 10:40:03 fuzzer started 2023/06/21 10:40:04 dialing manager at localhost:36067 2023/06/21 10:40:04 checking machine... 2023/06/21 10:40:04 checking revisions... [ 27.297594] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:40:04 testing simple program... [ 27.348739] cgroup: Unknown subsys name 'net' [ 27.383834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:40:03 Registers: info registers vcpu 0 RAX=fffffffffd694d61 RBX=ffffffff85fa4d38 RCX=ffffffff83639ab0 RDX=0000000000000000 RSI=ffffffff863b3218 RDI=ffffffff85fa4d24 RBP=ffffffff85fa4d24 RSP=ffff88801453f8f0 R8 =ffffffff863b3218 R9 =ffff88801453f9e8 R10=0000000000038001 R11=000000000008a8d8 R12=ffffffff85fa4d50 R13=ffffffff85fa4d24 R14=ffffffff85fa4d24 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f9539b21900 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=00007f953a0d90b0 CR3=0000000016d50000 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=0000000000000003 RBX=00000000ffffffff RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84537d61 RBP=ffff888008e07dc8 RSP=ffff88806cf09f80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000080 R15=0000000000000000 RIP=ffffffff84537d67 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=00007f9914bcd870 CR3=000000000cb36000 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=967be24be0198097634de10935b93997 XMM02=ec2efd57dc4c00df000000000011bf10 XMM03=bcda0fcd9f81606c000000000011bfe0 XMM04=a07437cf053b16b000000000000ae988 XMM05=dfcdbad4f1609c370000000000133448 XMM06=5660b22a019dd4c80000000000132620 XMM07=e042d86d42eb936e00000000001224e8 XMM08=bcda0fcd9f81606c000000000011bfe0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000