[ 32.318587] BUG: Bad rss-counter state mm:0000000054ab85db type:MM_FILEPAGES val:33 [ 32.319611] BUG: Bad rss-counter state mm:0000000054ab85db type:MM_ANONPAGES val:22 [ 32.476969] ================================================================== [ 32.477914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.478850] Read of size 8 at addr ffff88800f118140 by task sshd/220 [ 32.479624] [ 32.479846] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.480875] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.481850] Call Trace: [ 32.482175] [ 32.482495] dump_stack_lvl+0x91/0xf0 [ 32.482982] print_report+0xcc/0x620 [ 32.483485] ? __virt_addr_valid+0x102/0x340 [ 32.484041] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.484659] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.485275] kasan_report+0xbe/0xf0 [ 32.485757] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.486396] vma_interval_tree_remove+0xc75/0xec0 [ 32.487004] vma_prepare+0xc54/0x11a0 [ 32.487493] __split_vma+0x5af/0x950 [ 32.487968] ? __pfx___split_vma+0x10/0x10 [ 32.488489] ? find_held_lock+0x2c/0x110 [ 32.489013] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.489585] ? lock_is_held_type+0x9f/0x120 [ 32.490128] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.490735] ? mtree_range_walk+0x632/0x900 [ 32.491301] ? mas_walk+0x5c7/0x7c0 [ 32.491784] do_vmi_munmap+0x1f1/0x2b0 [ 32.492276] mmap_region+0x1f9/0x2660 [ 32.492759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.493278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.494013] ? __pfx_lock_acquire+0x10/0x10 [ 32.494545] ? __pfx_mmap_region+0x10/0x10 [ 32.495081] ? security_mmap_addr+0x7d/0xa0 [ 32.495617] ? get_unmapped_area+0x1f5/0x3f0 [ 32.496166] do_mmap+0x854/0xf00 [ 32.496621] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.497114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.497679] ksys_mmap_pgoff+0x3af/0x500 [ 32.498185] do_syscall_64+0x3f/0x90 [ 32.498664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.499318] RIP: 0033:0x7febe7508d82 [ 32.499779] 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 [ 32.501887] RSP: 002b:00007ffc293e5208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.502784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febe7508d82 [ 32.503643] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febe6942000 [ 32.504486] RBP: 00007febe6942000 R08: 0000000000000009 R09: 0000000000001000 [ 32.505333] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fa9d09d90 [ 32.506173] R13: 00007ffc293e5220 R14: 00007ffc293e5250 R15: 00007ffc293e55b0 [ 32.507027] [ 32.507322] [ 32.507539] Allocated by task 213: [ 32.507975] kasan_save_stack+0x22/0x50 [ 32.508485] kasan_set_track+0x25/0x30 [ 32.508979] __kasan_slab_alloc+0x59/0x70 [ 32.509505] kmem_cache_alloc+0x16b/0x370 [ 32.510018] vm_area_dup+0x20/0x160 [ 32.510474] __split_vma+0x170/0x950 [ 32.510942] split_vma+0xc6/0x110 [ 32.511388] mprotect_fixup+0x8d2/0xb30 [ 32.511888] do_mprotect_pkey+0x87e/0xd40 [ 32.512411] __x64_sys_mprotect+0x78/0xc0 [ 32.512931] do_syscall_64+0x3f/0x90 [ 32.513402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.514044] [ 32.514260] Freed by task 19: [ 32.514643] kasan_save_stack+0x22/0x50 [ 32.515144] kasan_set_track+0x25/0x30 [ 32.515659] kasan_save_free_info+0x2b/0x50 [ 32.516188] __kasan_slab_free+0x10a/0x190 [ 32.516722] kmem_cache_free+0x10d/0x4d0 [ 32.517230] rcu_core+0x8c8/0x2860 [ 32.517681] __do_softirq+0x1b7/0x7d4 [ 32.518156] [ 32.518372] Last potentially related work creation: [ 32.518957] kasan_save_stack+0x22/0x50 [ 32.519472] __kasan_record_aux_stack+0x8e/0xa0 [ 32.520043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.520679] remove_vma+0x139/0x170 [ 32.521205] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.521755] do_vmi_munmap+0x1f1/0x2b0 [ 32.522238] __vm_munmap+0x138/0x3a0 [ 32.522702] __x64_sys_munmap+0x59/0x80 [ 32.523195] do_syscall_64+0x3f/0x90 [ 32.523693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.524333] [ 32.524550] The buggy address belongs to the object at ffff88800f1180e8 [ 32.524550] which belongs to the cache vm_area_struct of size 168 [ 32.525997] The buggy address is located 88 bytes inside of [ 32.525997] freed 168-byte region [ffff88800f1180e8, ffff88800f118190) [ 32.527387] [ 32.527605] The buggy address belongs to the physical page: [ 32.528264] page:00000000fb112007 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf118 [ 32.529339] memcg:ffff8880168fe901 [ 32.529760] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.530406] page_type: 0xffffffff() [ 32.530858] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.531773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168fe901 [ 32.532678] page dumped because: kasan: bad access detected [ 32.533336] [ 32.533553] Memory state around the buggy address: [ 32.534128] ffff88800f118000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.534974] ffff88800f118080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.535841] >ffff88800f118100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.536694] ^ [ 32.537324] ffff88800f118180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.538173] ffff88800f118200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.539015] ================================================================== [ 32.539952] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.137293] BUG: Bad rss-counter state mm:00000000de1cbc38 type:MM_FILEPAGES val:33 [ 35.138344] BUG: Bad rss-counter state mm:00000000de1cbc38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39617' (ECDSA) to the list of known hosts. [ 35.777395] BUG: Bad rss-counter state mm:000000008e380343 type:MM_FILEPAGES val:33 [ 35.778562] BUG: Bad rss-counter state mm:000000008e380343 type:MM_ANONPAGES val:22 2023/06/20 02:40:00 fuzzer started 2023/06/20 02:40:01 dialing manager at localhost:44161 2023/06/20 02:40:01 checking machine... 2023/06/20 02:40:01 checking revisions... [ 36.376236] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:40:01 testing simple program... [ 36.425483] cgroup: Unknown subsys name 'net' [ 36.487717] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:39:52 Registers: info registers vcpu 0 RAX=ffff88800e30001c RBX=0000000000000008 RCX=000000000100007f RDX=0000000000000004 RSI=ffff888016c17420 RDI=ffff88800e30001c RBP=ffff888013f5d500 RSP=ffff888016c17390 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800e300020 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000001 R14=ffff888016c17420 R15=0000000000000ea8 RIP=ffffffff8450d187 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 00007f9fafbe6900 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=00007f9fb019d618 CR3=000000000c5b2000 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=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=00007f07f0df6ce0 CR3=000000000d178000 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=0f7ceda68efe298fe643bb814d9b52d9 XMM02=000000000011cb00eff9b2d0a8fce9cb XMM03=000000000011cbd02c67c8bc2e329bc3 XMM04=7fd20626911ed10d00000000000ae988 XMM05=19e9129bd510f23500000000001330f0 XMM06=2be796be3b8807160000000000131b60 XMM07=e042d86d42eb936e00000000001238c8 XMM08=74ace10627af5ee8000000000011cbd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000