[ 30.362084] BUG: Bad rss-counter state mm:0000000048ba7742 type:MM_FILEPAGES val:33 [ 30.362802] BUG: Bad rss-counter state mm:0000000048ba7742 type:MM_ANONPAGES val:22 [ 30.482316] ================================================================== [ 30.483389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.484509] Read of size 8 at addr ffff88801a381d08 by task sshd/218 [ 30.485535] [ 30.485671] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.486202] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.486820] Call Trace: [ 30.487017] [ 30.487194] dump_stack_lvl+0x91/0xf0 [ 30.487495] print_report+0xcc/0x620 [ 30.487794] ? __virt_addr_valid+0x102/0x340 [ 30.488138] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.488517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.488899] kasan_report+0xbe/0xf0 [ 30.489199] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.489583] vma_interval_tree_remove+0xc75/0xec0 [ 30.489951] vma_prepare+0xc54/0x11a0 [ 30.490248] __split_vma+0x5af/0x950 [ 30.490539] ? __pfx___split_vma+0x10/0x10 [ 30.490869] ? find_held_lock+0x2c/0x110 [ 30.491191] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.491535] ? lock_is_held_type+0x9f/0x120 [ 30.491878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.492271] ? mtree_range_walk+0x632/0x900 [ 30.492635] ? mas_walk+0x5c7/0x7c0 [ 30.492946] do_vmi_munmap+0x1f1/0x2b0 [ 30.493288] mmap_region+0x1f9/0x2660 [ 30.493609] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.493935] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.494416] ? __pfx_lock_acquire+0x10/0x10 [ 30.494758] ? __pfx_mmap_region+0x10/0x10 [ 30.495107] ? security_mmap_addr+0x7d/0xa0 [ 30.495457] ? get_unmapped_area+0x1f5/0x3f0 [ 30.495814] do_mmap+0x854/0xf00 [ 30.496108] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.496426] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.496789] ksys_mmap_pgoff+0x3af/0x500 [ 30.497122] do_syscall_64+0x3f/0x90 [ 30.497433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.497844] RIP: 0033:0x7efcc35d8d82 [ 30.498145] 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 [ 30.499524] RSP: 002b:00007ffd4662df68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.500116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcc35d8d82 [ 30.500663] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcc2a12000 [ 30.501218] RBP: 00007efcc2a12000 R08: 0000000000000009 R09: 0000000000001000 [ 30.501777] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d535decec0 [ 30.502346] R13: 00007ffd4662df80 R14: 00007ffd4662dfb0 R15: 00007ffd4662e310 [ 30.502913] [ 30.503101] [ 30.503246] Allocated by task 206: [ 30.503520] kasan_save_stack+0x22/0x50 [ 30.503845] kasan_set_track+0x25/0x30 [ 30.504168] __kasan_slab_alloc+0x59/0x70 [ 30.504516] kmem_cache_alloc+0x16b/0x370 [ 30.504841] vm_area_dup+0x20/0x160 [ 30.505153] __split_vma+0x170/0x950 [ 30.505468] split_vma+0xc6/0x110 [ 30.505758] mprotect_fixup+0x8d2/0xb30 [ 30.506090] do_mprotect_pkey+0x87e/0xd40 [ 30.506428] __x64_sys_mprotect+0x78/0xc0 [ 30.506766] do_syscall_64+0x3f/0x90 [ 30.507072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.507493] [ 30.507631] Freed by task 206: [ 30.507898] kasan_save_stack+0x22/0x50 [ 30.508227] kasan_set_track+0x25/0x30 [ 30.508548] kasan_save_free_info+0x2b/0x50 [ 30.508881] __kasan_slab_free+0x10a/0x190 [ 30.509231] kmem_cache_free+0x10d/0x4d0 [ 30.509558] rcu_core+0x8c8/0x2860 [ 30.509839] __do_softirq+0x1b7/0x7d4 [ 30.510148] [ 30.510288] Last potentially related work creation: [ 30.510660] kasan_save_stack+0x22/0x50 [ 30.510979] __kasan_record_aux_stack+0x8e/0xa0 [ 30.511342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.511752] remove_vma+0x139/0x170 [ 30.512053] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.512425] do_vmi_munmap+0x1f1/0x2b0 [ 30.512742] __vm_munmap+0x138/0x3a0 [ 30.513039] __x64_sys_munmap+0x59/0x80 [ 30.513361] do_syscall_64+0x3f/0x90 [ 30.513666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.514077] [ 30.514213] The buggy address belongs to the object at ffff88801a381cb0 [ 30.514213] which belongs to the cache vm_area_struct of size 168 [ 30.515169] The buggy address is located 88 bytes inside of [ 30.515169] freed 168-byte region [ffff88801a381cb0, ffff88801a381d58) [ 30.516078] [ 30.516218] The buggy address belongs to the physical page: [ 30.516652] page:0000000036098b39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a381 [ 30.517376] memcg:ffff88801a361701 [ 30.517644] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.518055] page_type: 0xffffffff() [ 30.518350] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.518944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a361701 [ 30.519533] page dumped because: kasan: bad access detected [ 30.519951] [ 30.520085] Memory state around the buggy address: [ 30.520458] ffff88801a381c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.521010] ffff88801a381c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.521561] >ffff88801a381d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.522099] ^ [ 30.522379] ffff88801a381d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.522916] ffff88801a381e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.523463] ================================================================== [ 30.524089] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.755559] BUG: Bad rss-counter state mm:00000000b61c9a07 type:MM_FILEPAGES val:33 [ 31.756751] BUG: Bad rss-counter state mm:00000000b61c9a07 type:MM_ANONPAGES val:22 [ 32.058069] BUG: Bad rss-counter state mm:00000000f4be5451 type:MM_FILEPAGES val:33 [ 32.058806] BUG: Bad rss-counter state mm:00000000f4be5451 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21691' (ECDSA) to the list of known hosts. 2023/06/19 23:48:35 fuzzer started 2023/06/19 23:48:35 dialing manager at localhost:44161 2023/06/19 23:48:35 checking machine... 2023/06/19 23:48:35 checking revisions... [ 32.621361] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:48:35 testing simple program... [ 32.667834] cgroup: Unknown subsys name 'net' [ 32.706599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:48:28 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=000056430eeb5fe0 CR3=0000000005482000 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=00007f691e55551000005612efe46790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86120363 RBX=0000000000000001 RCX=ffffffff86120360 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff86120362 RBP=ffff88800f0573c8 RSP=ffff88800f057300 R8 =0000000000000001 R9 =ffff88800f0573b0 R10=0000000000038001 R11=000000000001cfe6 R12=ffff88800f0573d0 R13=ffff88800f0573b8 R14=ffff88800f057730 R15=ffff88800f057370 RIP=ffffffff811311ed 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 00007f6d3b07d900 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=00007f6d3b634618 CR3=0000000016b14000 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=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