[ 47.429558] BUG: Bad rss-counter state mm:0000000021a3c74f type:MM_FILEPAGES val:31 [ 47.430614] BUG: Bad rss-counter state mm:0000000021a3c74f type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 47.603470] ================================================================== [ 47.604367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.605387] Read of size 8 at addr ffff88800efb25c8 by task sshd/221 [ 47.606146] [ 47.606384] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.607242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.608209] Call Trace: [ 47.608529] [ 47.608810] dump_stack_lvl+0x91/0xf0 [ 47.609303] print_report+0xcc/0x620 [ 47.609781] ? __virt_addr_valid+0x102/0x340 [ 47.610337] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.610942] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.611552] kasan_report+0xbe/0xf0 [ 47.612024] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.612655] vma_interval_tree_remove+0xc75/0xec0 [ 47.613246] vma_prepare+0xc54/0x11a0 [ 47.613735] __split_vma+0x5af/0x950 [ 47.614202] ? __pfx___split_vma+0x10/0x10 [ 47.614735] ? find_held_lock+0x2c/0x110 [ 47.615251] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.615813] ? lock_is_held_type+0x9f/0x120 [ 47.616345] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.616941] ? mtree_range_walk+0x632/0x900 [ 47.617483] ? mas_walk+0x5c7/0x7c0 [ 47.617950] do_vmi_munmap+0x1f1/0x2b0 [ 47.618452] mmap_region+0x1f9/0x2660 [ 47.618932] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.619448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.620181] ? __pfx_lock_acquire+0x10/0x10 [ 47.620730] ? __pfx_mmap_region+0x10/0x10 [ 47.621284] ? security_mmap_addr+0x7d/0xa0 [ 47.621837] ? get_unmapped_area+0x1f5/0x3f0 [ 47.622416] do_mmap+0x854/0xf00 [ 47.622874] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.623382] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.623962] ksys_mmap_pgoff+0x3af/0x500 [ 47.624497] do_syscall_64+0x3f/0x90 [ 47.624988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.625667] RIP: 0033:0x7fc4247a6d82 [ 47.626141] 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 [ 47.628388] RSP: 002b:00007ffcfcf39028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.629318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4247a6d82 [ 47.630186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc423be0000 [ 47.631057] RBP: 00007fc423be0000 R08: 0000000000000009 R09: 0000000000001000 [ 47.631913] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b11d932ec0 [ 47.632779] R13: 00007ffcfcf39040 R14: 00007ffcfcf39070 R15: 00007ffcfcf393d0 [ 47.633653] [ 47.633959] [ 47.634182] Allocated by task 214: [ 47.634649] kasan_save_stack+0x22/0x50 [ 47.635171] kasan_set_track+0x25/0x30 [ 47.635681] __kasan_slab_alloc+0x59/0x70 [ 47.636221] kmem_cache_alloc+0x16b/0x370 [ 47.636752] vm_area_dup+0x20/0x160 [ 47.637227] __split_vma+0x170/0x950 [ 47.637712] split_vma+0xc6/0x110 [ 47.638163] mprotect_fixup+0x8d2/0xb30 [ 47.638684] do_mprotect_pkey+0x87e/0xd40 [ 47.639222] __x64_sys_mprotect+0x78/0xc0 [ 47.639765] do_syscall_64+0x3f/0x90 [ 47.640257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.640922] [ 47.641143] Freed by task 214: [ 47.641554] kasan_save_stack+0x22/0x50 [ 47.642081] kasan_set_track+0x25/0x30 [ 47.642601] kasan_save_free_info+0x2b/0x50 [ 47.643159] __kasan_slab_free+0x10a/0x190 [ 47.643716] kmem_cache_free+0x10d/0x4d0 [ 47.644249] rcu_core+0x8c8/0x2860 [ 47.644719] __do_softirq+0x1b7/0x7d4 [ 47.645218] [ 47.645439] Last potentially related work creation: [ 47.646042] kasan_save_stack+0x22/0x50 [ 47.646581] __kasan_record_aux_stack+0x8e/0xa0 [ 47.647177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.647850] remove_vma+0x139/0x170 [ 47.648319] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.648879] do_vmi_munmap+0x1f1/0x2b0 [ 47.649361] __vm_munmap+0x138/0x3a0 [ 47.649822] __x64_sys_munmap+0x59/0x80 [ 47.650310] do_syscall_64+0x3f/0x90 [ 47.650789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.651429] [ 47.651641] The buggy address belongs to the object at ffff88800efb2570 [ 47.651641] which belongs to the cache vm_area_struct of size 168 [ 47.653105] The buggy address is located 88 bytes inside of [ 47.653105] freed 168-byte region [ffff88800efb2570, ffff88800efb2618) [ 47.654507] [ 47.654722] The buggy address belongs to the physical page: [ 47.655379] page:000000000f1830b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefb2 [ 47.656450] memcg:ffff88800999a901 [ 47.656870] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.657508] page_type: 0xffffffff() [ 47.657953] raw: 0100000000000200 ffff88800879fc80 ffffea0000386bc0 dead000000000002 [ 47.658863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800999a901 [ 47.659766] page dumped because: kasan: bad access detected [ 47.660417] [ 47.660630] Memory state around the buggy address: [ 47.661205] ffff88800efb2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.662051] ffff88800efb2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 47.662911] >ffff88800efb2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.663756] ^ [ 47.664415] ffff88800efb2600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 47.665260] ffff88800efb2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.666099] ================================================================== [ 47.667116] Disabling lock debugging due to kernel taint [ 49.545113] BUG: Bad rss-counter state mm:00000000f5124345 type:MM_FILEPAGES val:33 [ 49.545895] BUG: Bad rss-counter state mm:00000000f5124345 type:MM_ANONPAGES val:22 [ 50.041057] BUG: Bad rss-counter state mm:00000000bb9779b9 type:MM_FILEPAGES val:33 [ 50.042056] BUG: Bad rss-counter state mm:00000000bb9779b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33222' (ECDSA) to the list of known hosts. 2023/06/20 02:27:06 fuzzer started 2023/06/20 02:27:06 dialing manager at localhost:44161 2023/06/20 02:27:06 checking machine... 2023/06/20 02:27:06 checking revisions... [ 50.774500] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:27:06 testing simple program... [ 50.827436] cgroup: Unknown subsys name 'net' [ 50.876017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:26:49 Registers: info registers vcpu 0 RAX=00000016d72b7ff0 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000054081 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f08a9 R11=0000000000000001 R12=0000000000054081 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-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 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=00007fae108abdd0 CR3=000000000b94a000 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=c6203f160f21d4b5d2452491c8c768cd XMM02=2c67c8bc2e329bc3000000000011e900 XMM03=fb795ef6d65770560000000000125290 XMM04=d1a7223b9ec2e75100000000000ae988 XMM05=e4cb8bb95a7664b60000000000134e28 XMM06=652bb096f3bc37fd0000000000133c90 XMM07=e042d86d42eb936e0000000000125510 XMM08=6d688ebe4f46c631000000000011e960 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d9e45f RBX=ffff88800ecf22c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ecf22f8 RBP=ffff88800dc310e8 RSP=ffff8880177af888 R8 =0000000000000001 R9 =ffffed1002ef5f05 R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800f2b8000 R14=ffffffff83677d2f R15=0000000000000014 RIP=ffffffff8184636c RFL=00000046 [---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 00007f05e974c900 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=00007f05e9d03618 CR3=000000000ee9c000 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=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