[ 31.554871] BUG: Bad rss-counter state mm:000000007ce3bd1f type:MM_FILEPAGES val:33 [ 31.556508] BUG: Bad rss-counter state mm:000000007ce3bd1f type:MM_ANONPAGES val:22 [ 31.722123] ================================================================== [ 31.723189] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.724284] Read of size 8 at addr ffff88800dfc56b0 by task sshd/220 [ 31.725367] [ 31.725603] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.726415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.727331] Call Trace: [ 31.727635] [ 31.727904] dump_stack_lvl+0x91/0xf0 [ 31.728368] print_report+0xcc/0x620 [ 31.728830] ? __virt_addr_valid+0x102/0x340 [ 31.729352] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.729942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.730519] kasan_report+0xbe/0xf0 [ 31.730978] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.731573] vma_interval_tree_remove+0xc75/0xec0 [ 31.732140] vma_prepare+0xc54/0x11a0 [ 31.732594] __split_vma+0x5af/0x950 [ 31.733056] ? __pfx___split_vma+0x10/0x10 [ 31.733572] ? find_held_lock+0x2c/0x110 [ 31.734107] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.734665] ? lock_is_held_type+0x9f/0x120 [ 31.735194] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.735786] ? mtree_range_walk+0x632/0x900 [ 31.736344] ? mas_walk+0x5c7/0x7c0 [ 31.736820] do_vmi_munmap+0x1f1/0x2b0 [ 31.737300] mmap_region+0x1f9/0x2660 [ 31.737785] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.738292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.739000] ? __pfx_lock_acquire+0x10/0x10 [ 31.739529] ? __pfx_mmap_region+0x10/0x10 [ 31.740046] ? security_mmap_addr+0x7d/0xa0 [ 31.740580] ? get_unmapped_area+0x1f5/0x3f0 [ 31.741116] do_mmap+0x854/0xf00 [ 31.741549] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.742043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.742596] ksys_mmap_pgoff+0x3af/0x500 [ 31.743102] do_syscall_64+0x3f/0x90 [ 31.743565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.744202] RIP: 0033:0x7fa229cb0d82 [ 31.744652] 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 [ 31.746768] RSP: 002b:00007ffe8b4c7198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.747658] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa229cb0d82 [ 31.748493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2290ea000 [ 31.749332] RBP: 00007fa2290ea000 R08: 0000000000000009 R09: 0000000000001000 [ 31.750170] R10: 0000000000000812 R11: 0000000000000206 R12: 000055589a8b5f60 [ 31.751005] R13: 00007ffe8b4c71b0 R14: 00007ffe8b4c71e0 R15: 00007ffe8b4c7540 [ 31.751840] [ 31.752133] [ 31.752343] Allocated by task 213: [ 31.752763] kasan_save_stack+0x22/0x50 [ 31.753259] kasan_set_track+0x25/0x30 [ 31.753764] __kasan_slab_alloc+0x59/0x70 [ 31.754281] kmem_cache_alloc+0x16b/0x370 [ 31.754785] vm_area_dup+0x20/0x160 [ 31.755239] __split_vma+0x170/0x950 [ 31.755703] split_vma+0xc6/0x110 [ 31.756133] mprotect_fixup+0x8d2/0xb30 [ 31.756629] do_mprotect_pkey+0x87e/0xd40 [ 31.757153] __x64_sys_mprotect+0x78/0xc0 [ 31.757661] do_syscall_64+0x3f/0x90 [ 31.758135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.758776] [ 31.758992] Freed by task 213: [ 31.759381] kasan_save_stack+0x22/0x50 [ 31.759868] kasan_set_track+0x25/0x30 [ 31.760363] kasan_save_free_info+0x2b/0x50 [ 31.760902] __kasan_slab_free+0x10a/0x190 [ 31.761453] kmem_cache_free+0x10d/0x4d0 [ 31.761945] rcu_core+0x8c8/0x2860 [ 31.762367] __do_softirq+0x1b7/0x7d4 [ 31.762818] [ 31.763024] Last potentially related work creation: [ 31.763569] kasan_save_stack+0x22/0x50 [ 31.764048] __kasan_record_aux_stack+0x8e/0xa0 [ 31.764590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.765192] remove_vma+0x139/0x170 [ 31.765626] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.766236] do_vmi_munmap+0x1f1/0x2b0 [ 31.766708] __vm_munmap+0x138/0x3a0 [ 31.767156] __x64_sys_munmap+0x59/0x80 [ 31.767622] do_syscall_64+0x3f/0x90 [ 31.768073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.768687] [ 31.768897] Second to last potentially related work creation: [ 31.769545] kasan_save_stack+0x22/0x50 [ 31.770033] __kasan_record_aux_stack+0x8e/0xa0 [ 31.770575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.771200] remove_vma+0x139/0x170 [ 31.771633] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.772184] do_vmi_munmap+0x1f1/0x2b0 [ 31.772658] mmap_region+0x1f9/0x2660 [ 31.773141] do_mmap+0x854/0xf00 [ 31.773560] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.774046] ksys_mmap_pgoff+0x3af/0x500 [ 31.774548] do_syscall_64+0x3f/0x90 [ 31.775017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775649] [ 31.775856] The buggy address belongs to the object at ffff88800dfc5658 [ 31.775856] which belongs to the cache vm_area_struct of size 168 [ 31.777276] The buggy address is located 88 bytes inside of [ 31.777276] freed 168-byte region [ffff88800dfc5658, ffff88800dfc5700) [ 31.778672] [ 31.778883] The buggy address belongs to the physical page: [ 31.779530] page:00000000a6ff5626 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfc5 [ 31.780605] memcg:ffff8880097d0001 [ 31.781024] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.781671] page_type: 0xffffffff() [ 31.782114] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ee800 dead000000000002 [ 31.783003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d0001 [ 31.783889] page dumped because: kasan: bad access detected [ 31.784541] [ 31.784750] Memory state around the buggy address: [ 31.785317] ffff88800dfc5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.786178] ffff88800dfc5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.787005] >ffff88800dfc5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.787839] ^ [ 31.788408] ffff88800dfc5700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.789244] ffff88800dfc5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.790091] ================================================================== [ 31.790991] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.410579] BUG: Bad rss-counter state mm:00000000e31cefca type:MM_FILEPAGES val:33 [ 34.411618] BUG: Bad rss-counter state mm:00000000e31cefca type:MM_ANONPAGES val:22 [ 34.947522] BUG: Bad rss-counter state mm:00000000282be619 type:MM_FILEPAGES val:33 [ 34.948679] BUG: Bad rss-counter state mm:00000000282be619 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54849' (ECDSA) to the list of known hosts. 2023/06/21 07:59:51 fuzzer started 2023/06/21 07:59:51 dialing manager at localhost:36067 2023/06/21 07:59:51 checking machine... 2023/06/21 07:59:51 checking revisions... [ 35.622299] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:59:51 testing simple program... [ 35.678004] cgroup: Unknown subsys name 'net' [ 35.747568] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:59:50 Registers: info registers vcpu 0 RAX=0000000000000040 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c138f RSI=ffffffff83863b7b RDI=ffff88806ce09b6c RBP=ffff88806ce09c78 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000009195a R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888009ba1b40 R15=ffff88800d9681b0 RIP=ffffffff813ad553 RFL=00000283 [--S---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 00007f9e2c7ed900 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=00007ffd06e00000 CR3=000000000961a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c04400 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=00007fcd70a69f10 CR3=000000000d7be000 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=6c8d3a98e700f096734ac8d5f8e568eb XMM02=2c67c8bc2e329bc3000000000011b800 XMM03=fb795ef6d65770560000000000121a08 XMM04=7682fd3b24aaa62d00000000000ae988 XMM05=19e9129bd510f2350000000000132858 XMM06=3121e4fce1aa15b30000000000131a30 XMM07=e042d86d42eb936e0000000000121c88 XMM08=a3acf8039016b62e000000000011b860 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000