[ 33.466336] BUG: Bad rss-counter state mm:00000000fbc9b52f type:MM_FILEPAGES val:33 [ 33.467103] BUG: Bad rss-counter state mm:00000000fbc9b52f type:MM_ANONPAGES val:22 [ 33.595800] ================================================================== [ 33.596526] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.597253] Read of size 8 at addr ffff88800d1a8140 by task sshd/220 [ 33.597839] [ 33.598020] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.598712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.599462] Call Trace: [ 33.599705] [ 33.599924] dump_stack_lvl+0x91/0xf0 [ 33.600462] print_report+0xcc/0x620 [ 33.600832] ? __virt_addr_valid+0x102/0x340 [ 33.601254] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.601724] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.602213] kasan_report+0xbe/0xf0 [ 33.602588] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.603067] vma_interval_tree_remove+0xc75/0xec0 [ 33.603528] vma_prepare+0xc54/0x11a0 [ 33.603899] __split_vma+0x5af/0x950 [ 33.604260] ? __pfx___split_vma+0x10/0x10 [ 33.604662] ? find_held_lock+0x2c/0x110 [ 33.605185] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.605646] ? lock_is_held_type+0x9f/0x120 [ 33.606064] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.606545] ? mtree_range_walk+0x632/0x900 [ 33.606965] ? mas_walk+0x5c7/0x7c0 [ 33.607321] do_vmi_munmap+0x1f1/0x2b0 [ 33.607696] mmap_region+0x1f9/0x2660 [ 33.608068] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.608465] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.609008] ? __pfx_lock_acquire+0x10/0x10 [ 33.609414] ? __pfx_mmap_region+0x10/0x10 [ 33.609816] ? security_mmap_addr+0x7d/0xa0 [ 33.610242] ? get_unmapped_area+0x1f5/0x3f0 [ 33.610662] do_mmap+0x854/0xf00 [ 33.610996] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.611376] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.611804] ksys_mmap_pgoff+0x3af/0x500 [ 33.612192] do_syscall_64+0x3f/0x90 [ 33.612556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.613048] RIP: 0033:0x7fea10224d82 [ 33.613393] 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 [ 33.615031] RSP: 002b:00007fff7a393998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.615723] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea10224d82 [ 33.616370] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea0f65e000 [ 33.617023] RBP: 00007fea0f65e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.617671] R10: 0000000000000812 R11: 0000000000000206 R12: 000055565c70ad90 [ 33.618331] R13: 00007fff7a3939b0 R14: 00007fff7a3939e0 R15: 00007fff7a393d40 [ 33.618989] [ 33.619210] [ 33.619375] Allocated by task 212: [ 33.619700] kasan_save_stack+0x22/0x50 [ 33.620084] kasan_set_track+0x25/0x30 [ 33.620464] __kasan_slab_alloc+0x59/0x70 [ 33.620865] kmem_cache_alloc+0x16b/0x370 [ 33.621261] vm_area_dup+0x20/0x160 [ 33.621610] __split_vma+0x170/0x950 [ 33.621982] split_vma+0xc6/0x110 [ 33.622319] mprotect_fixup+0x8d2/0xb30 [ 33.622702] do_mprotect_pkey+0x87e/0xd40 [ 33.623100] __x64_sys_mprotect+0x78/0xc0 [ 33.623501] do_syscall_64+0x3f/0x90 [ 33.623869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.624363] [ 33.624528] Freed by task 19: [ 33.624815] kasan_save_stack+0x22/0x50 [ 33.625204] kasan_set_track+0x25/0x30 [ 33.625579] kasan_save_free_info+0x2b/0x50 [ 33.625991] __kasan_slab_free+0x10a/0x190 [ 33.626396] kmem_cache_free+0x10d/0x4d0 [ 33.626788] rcu_core+0x8c8/0x2860 [ 33.627131] __do_softirq+0x1b7/0x7d4 [ 33.627497] [ 33.627659] Last potentially related work creation: [ 33.628108] kasan_save_stack+0x22/0x50 [ 33.628493] __kasan_record_aux_stack+0x8e/0xa0 [ 33.628933] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.629429] remove_vma+0x139/0x170 [ 33.629774] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.630209] do_vmi_munmap+0x1f1/0x2b0 [ 33.630581] __vm_munmap+0x138/0x3a0 [ 33.630935] __x64_sys_munmap+0x59/0x80 [ 33.631313] do_syscall_64+0x3f/0x90 [ 33.631676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.632167] [ 33.632329] Second to last potentially related work creation: [ 33.632854] kasan_save_stack+0x22/0x50 [ 33.633240] __kasan_record_aux_stack+0x8e/0xa0 [ 33.633676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.634177] remove_vma+0x139/0x170 [ 33.634519] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.634946] do_vmi_munmap+0x1f1/0x2b0 [ 33.635314] mmap_region+0x1f9/0x2660 [ 33.635677] do_mmap+0x854/0xf00 [ 33.636018] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.636393] ksys_mmap_pgoff+0x3af/0x500 [ 33.636775] do_syscall_64+0x3f/0x90 [ 33.637136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.637621] [ 33.637782] The buggy address belongs to the object at ffff88800d1a80e8 [ 33.637782] which belongs to the cache vm_area_struct of size 168 [ 33.638917] The buggy address is located 88 bytes inside of [ 33.638917] freed 168-byte region [ffff88800d1a80e8, ffff88800d1a8190) [ 33.639988] [ 33.640153] The buggy address belongs to the physical page: [ 33.640677] page:0000000008237dcb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd1a8 [ 33.641527] memcg:ffff88800d200301 [ 33.641863] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.642436] page_type: 0xffffffff() [ 33.642788] raw: 0100000000000200 ffff88800879fc80 ffffea000038f6c0 dead000000000003 [ 33.643526] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d200301 [ 33.644235] page dumped because: kasan: bad access detected [ 33.644741] [ 33.644913] Memory state around the buggy address: [ 33.645377] ffff88800d1a8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.646092] ffff88800d1a8080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.646761] >ffff88800d1a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.647410] ^ [ 33.647896] ffff88800d1a8180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 33.648544] ffff88800d1a8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.649198] ================================================================== [ 33.650148] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.062905] BUG: Bad rss-counter state mm:0000000003627ae2 type:MM_FILEPAGES val:33 [ 36.063887] BUG: Bad rss-counter state mm:0000000003627ae2 type:MM_ANONPAGES val:22 [ 36.555205] BUG: Bad rss-counter state mm:000000000a01488d type:MM_FILEPAGES val:33 [ 36.556369] BUG: Bad rss-counter state mm:000000000a01488d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63537' (ECDSA) to the list of known hosts. 2023/06/20 06:07:18 fuzzer started 2023/06/20 06:07:19 dialing manager at localhost:44161 2023/06/20 06:07:19 checking machine... 2023/06/20 06:07:19 checking revisions... [ 37.311720] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:07:19 testing simple program... [ 37.370632] cgroup: Unknown subsys name 'net' [ 37.426355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:07:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=1ffff1100d9c1359 RDX=dffffc0000000000 RSI=ffffffff812e004a RDI=ffff888016877e50 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff864bb032 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130702 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 00007f9ae1d5a900 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=00007f9ae2311618 CR3=000000001bc44000 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=563412feff00545000000000000080fe 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f8e7a702680 CR3=000000000d998000 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=96b0b76a678d819d0e420d22d5e4bdf0 XMM02=000000000011cfc0ec2efd57dc4c00df XMM03=00000000001239603c729f9175b72f4e XMM04=b5e33571070257ef00000000000ae988 XMM05=19e9129bd510f2350000000000134618 XMM06=45c31ad8ad1e8a4e00000000001337d0 XMM07=e042d86d42eb936e0000000000123be0 XMM08=3c729f9175b72f4e000000000011d020 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000