[ 30.194486] BUG: Bad rss-counter state mm:000000001f276c4c type:MM_FILEPAGES val:33 [ 30.196532] BUG: Bad rss-counter state mm:000000001f276c4c type:MM_ANONPAGES val:22 [ 30.358699] ================================================================== [ 30.359610] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.360546] Read of size 8 at addr ffff88800e7425c8 by task sshd/220 [ 30.361307] [ 30.361526] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.362546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.363511] Call Trace: [ 30.363830] [ 30.364139] dump_stack_lvl+0x91/0xf0 [ 30.364628] print_report+0xcc/0x620 [ 30.365106] ? __virt_addr_valid+0x102/0x340 [ 30.365671] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.366281] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.366891] kasan_report+0xbe/0xf0 [ 30.367364] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.367981] vma_interval_tree_remove+0xc75/0xec0 [ 30.368580] vma_prepare+0xc54/0x11a0 [ 30.369055] __split_vma+0x5af/0x950 [ 30.369531] ? __pfx___split_vma+0x10/0x10 [ 30.370070] ? find_held_lock+0x2c/0x110 [ 30.370586] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.371153] ? lock_is_held_type+0x9f/0x120 [ 30.371690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.372301] ? mtree_range_walk+0x632/0x900 [ 30.372853] ? mas_walk+0x5c7/0x7c0 [ 30.373326] do_vmi_munmap+0x1f1/0x2b0 [ 30.373831] mmap_region+0x1f9/0x2660 [ 30.374310] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.374821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.375538] ? __pfx_lock_acquire+0x10/0x10 [ 30.376075] ? __pfx_mmap_region+0x10/0x10 [ 30.376603] ? security_mmap_addr+0x7d/0xa0 [ 30.377136] ? get_unmapped_area+0x1f5/0x3f0 [ 30.377692] do_mmap+0x854/0xf00 [ 30.378138] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.378631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.379198] ksys_mmap_pgoff+0x3af/0x500 [ 30.379706] do_syscall_64+0x3f/0x90 [ 30.380186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.380840] RIP: 0033:0x7f3bd7260d82 [ 30.381304] 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 [ 30.383437] RSP: 002b:00007fff775eef58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.384345] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bd7260d82 [ 30.385187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bd669a000 [ 30.386047] RBP: 00007f3bd669a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.386890] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563be461f60 [ 30.387737] R13: 00007fff775eef70 R14: 00007fff775eefa0 R15: 00007fff775ef300 [ 30.388592] [ 30.388883] [ 30.389097] Allocated by task 213: [ 30.389527] kasan_save_stack+0x22/0x50 [ 30.390035] kasan_set_track+0x25/0x30 [ 30.390534] __kasan_slab_alloc+0x59/0x70 [ 30.391097] kmem_cache_alloc+0x16b/0x370 [ 30.391671] vm_area_dup+0x20/0x160 [ 30.392187] __split_vma+0x170/0x950 [ 30.392705] split_vma+0xc6/0x110 [ 30.393199] mprotect_fixup+0x8d2/0xb30 [ 30.393770] do_mprotect_pkey+0x87e/0xd40 [ 30.394357] __x64_sys_mprotect+0x78/0xc0 [ 30.394949] do_syscall_64+0x3f/0x90 [ 30.395489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396212] [ 30.396450] Freed by task 213: [ 30.396897] kasan_save_stack+0x22/0x50 [ 30.397461] kasan_set_track+0x25/0x30 [ 30.398032] kasan_save_free_info+0x2b/0x50 [ 30.398631] __kasan_slab_free+0x10a/0x190 [ 30.399228] kmem_cache_free+0x10d/0x4d0 [ 30.399808] rcu_core+0x8c8/0x2860 [ 30.400302] __do_softirq+0x1b7/0x7d4 [ 30.400834] [ 30.401078] Last potentially related work creation: [ 30.401747] kasan_save_stack+0x22/0x50 [ 30.402317] __kasan_record_aux_stack+0x8e/0xa0 [ 30.403042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.403756] remove_vma+0x139/0x170 [ 30.404257] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.404878] do_vmi_munmap+0x1f1/0x2b0 [ 30.405419] __vm_munmap+0x138/0x3a0 [ 30.405952] __x64_sys_munmap+0x59/0x80 [ 30.406510] do_syscall_64+0x3f/0x90 [ 30.407046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.407790] [ 30.408036] Second to last potentially related work creation: [ 30.408820] kasan_save_stack+0x22/0x50 [ 30.409416] __kasan_record_aux_stack+0x8e/0xa0 [ 30.410094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.410834] remove_vma+0x139/0x170 [ 30.411367] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.412011] do_vmi_munmap+0x1f1/0x2b0 [ 30.412585] mmap_region+0x1f9/0x2660 [ 30.413149] do_mmap+0x854/0xf00 [ 30.413661] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.414227] ksys_mmap_pgoff+0x3af/0x500 [ 30.414815] do_syscall_64+0x3f/0x90 [ 30.415381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.416140] [ 30.416393] The buggy address belongs to the object at ffff88800e742570 [ 30.416393] which belongs to the cache vm_area_struct of size 168 [ 30.418134] The buggy address is located 88 bytes inside of [ 30.418134] freed 168-byte region [ffff88800e742570, ffff88800e742618) [ 30.419788] [ 30.420043] The buggy address belongs to the physical page: [ 30.420813] page:000000004e240166 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe742 [ 30.422106] memcg:ffff88800e393701 [ 30.422610] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.423363] page_type: 0xffffffff() [ 30.423877] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ea00 dead000000000008 [ 30.424946] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e393701 [ 30.426032] page dumped because: kasan: bad access detected [ 30.426803] [ 30.427056] Memory state around the buggy address: [ 30.427734] ffff88800e742480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.428737] ffff88800e742500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.429751] >ffff88800e742580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.430748] ^ [ 30.431532] ffff88800e742600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.432531] ffff88800e742680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.433525] ================================================================== [ 30.434672] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.321383] BUG: Bad rss-counter state mm:00000000f6054efa type:MM_FILEPAGES val:33 [ 32.322581] BUG: Bad rss-counter state mm:00000000f6054efa type:MM_ANONPAGES val:22 [ 32.804379] BUG: Bad rss-counter state mm:000000003487f2be type:MM_FILEPAGES val:33 [ 32.805545] BUG: Bad rss-counter state mm:000000003487f2be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14184' (ECDSA) to the list of known hosts. 2023/06/20 16:14:11 fuzzer started 2023/06/20 16:14:11 dialing manager at localhost:36067 2023/06/20 16:14:11 checking machine... 2023/06/20 16:14:11 checking revisions... [ 33.515848] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:14:11 testing simple program... [ 33.560680] cgroup: Unknown subsys name 'net' [ 33.602014] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:14:11 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff888009e37888 RDX=1ffff110013c6f08 RSI=ffffffff813ad720 RDI=ffff888009e378b0 RBP=ffff888009e37880 RSP=ffff888009e377e0 R8 =0000000000000001 R9 =ffff888009e37828 R10=0000000000038001 R11=0000000000003c0d R12=ffff888009e378b0 R13=0000000000000000 R14=ffff88800db59b40 R15=0000000000092cc0 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007f4e09fc3900 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=00007f4e0a57a618 CR3=0000000008c7e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f211679c8a0 CR3=00000000099aa000 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=4643c34f627fe8bfbf4e4dfb280b0bfa XMM02=2c67c8bc2e329bc3000000000011b0f0 XMM03=fb795ef6d65770560000000000121e40 XMM04=e34e15d9db5a3dd700000000000ae988 XMM05=bee09c1196ceef470000000000133ef8 XMM06=4fda316b135da52b0000000000132c28 XMM07=e042d86d42eb936e0000000000122118 XMM08=f5ccb60673ebe9fb000000000011b150 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000