syzkaller login: [ 91.350777] BUG: Bad rss-counter state mm:00000000a63f5b4a type:MM_FILEPAGES val:33 [ 91.351810] BUG: Bad rss-counter state mm:00000000a63f5b4a type:MM_ANONPAGES val:22 [ 91.509930] ================================================================== [ 91.510870] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 91.511807] Read of size 8 at addr ffff88800f89d3f8 by task sshd/224 [ 91.512580] [ 91.512811] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 91.513861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 91.514837] Call Trace: [ 91.515157] [ 91.515475] dump_stack_lvl+0x91/0xf0 [ 91.515972] print_report+0xcc/0x620 [ 91.516463] ? __virt_addr_valid+0x102/0x340 [ 91.517035] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.517651] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.518267] kasan_report+0xbe/0xf0 [ 91.518748] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.519368] vma_interval_tree_remove+0xc75/0xec0 [ 91.519977] vma_prepare+0xc54/0x11a0 [ 91.520453] __split_vma+0x5af/0x950 [ 91.520931] ? __pfx___split_vma+0x10/0x10 [ 91.521463] ? find_held_lock+0x2c/0x110 [ 91.521988] do_vmi_align_munmap+0x2ba/0x11f0 [ 91.522555] ? lock_is_held_type+0x9f/0x120 [ 91.523096] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 91.523705] ? mtree_range_walk+0x632/0x900 [ 91.524258] ? mas_walk+0x5c7/0x7c0 [ 91.524736] do_vmi_munmap+0x1f1/0x2b0 [ 91.525252] mmap_region+0x1f9/0x2660 [ 91.525738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 91.526251] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 91.526964] ? __pfx_lock_acquire+0x10/0x10 [ 91.527497] ? __pfx_mmap_region+0x10/0x10 [ 91.528034] ? security_mmap_addr+0x7d/0xa0 [ 91.528565] ? get_unmapped_area+0x1f5/0x3f0 [ 91.529127] do_mmap+0x854/0xf00 [ 91.529568] vm_mmap_pgoff+0x1a6/0x3a0 [ 91.530069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 91.530634] ksys_mmap_pgoff+0x3af/0x500 [ 91.531145] do_syscall_64+0x3f/0x90 [ 91.531628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.532273] RIP: 0033:0x7f3be5038d82 [ 91.532724] 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 [ 91.534862] RSP: 002b:00007ffe5983e558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 91.535778] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3be5038d82 [ 91.536623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3be4472000 [ 91.537490] RBP: 00007f3be4472000 R08: 0000000000000009 R09: 0000000000001000 [ 91.538329] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557bfe0f9f60 [ 91.539169] R13: 00007ffe5983e570 R14: 00007ffe5983e5a0 R15: 00007ffe5983e900 [ 91.540021] [ 91.540322] [ 91.540540] Allocated by task 217: [ 91.540977] kasan_save_stack+0x22/0x50 [ 91.541482] kasan_set_track+0x25/0x30 [ 91.541980] __kasan_slab_alloc+0x59/0x70 [ 91.542503] kmem_cache_alloc+0x16b/0x370 [ 91.543021] vm_area_dup+0x20/0x160 [ 91.543477] __split_vma+0x170/0x950 [ 91.543941] split_vma+0xc6/0x110 [ 91.544380] mprotect_fixup+0x8d2/0xb30 [ 91.544899] do_mprotect_pkey+0x87e/0xd40 [ 91.545426] __x64_sys_mprotect+0x78/0xc0 [ 91.545947] do_syscall_64+0x3f/0x90 [ 91.546426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.547065] [ 91.547281] Freed by task 217: [ 91.547679] kasan_save_stack+0x22/0x50 [ 91.548179] kasan_set_track+0x25/0x30 [ 91.548673] kasan_save_free_info+0x2b/0x50 [ 91.549213] __kasan_slab_free+0x10a/0x190 [ 91.549749] kmem_cache_free+0x10d/0x4d0 [ 91.550260] rcu_core+0x8c8/0x2860 [ 91.550704] __do_softirq+0x1b7/0x7d4 [ 91.551179] [ 91.551395] Last potentially related work creation: [ 91.551978] kasan_save_stack+0x22/0x50 [ 91.552486] __kasan_record_aux_stack+0x8e/0xa0 [ 91.553071] __call_rcu_common.constprop.0+0x6a/0xb90 [ 91.553719] remove_vma+0x139/0x170 [ 91.554243] do_vmi_align_munmap+0xd4a/0x11f0 [ 91.554804] do_vmi_munmap+0x1f1/0x2b0 [ 91.555291] __vm_munmap+0x138/0x3a0 [ 91.555757] __x64_sys_munmap+0x59/0x80 [ 91.556262] do_syscall_64+0x3f/0x90 [ 91.556740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.557396] [ 91.557613] The buggy address belongs to the object at ffff88800f89d3a0 [ 91.557613] which belongs to the cache vm_area_struct of size 168 [ 91.559081] The buggy address is located 88 bytes inside of [ 91.559081] freed 168-byte region [ffff88800f89d3a0, ffff88800f89d448) [ 91.560475] [ 91.560694] The buggy address belongs to the physical page: [ 91.561358] page:00000000331d9c25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf89d [ 91.562452] memcg:ffff88800f0f5f01 [ 91.562882] flags: 0x100000000000200(slab|node=0|zone=1) [ 91.563527] page_type: 0xffffffff() [ 91.563973] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 91.564907] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0f5f01 [ 91.565815] page dumped because: kasan: bad access detected [ 91.566478] [ 91.566696] Memory state around the buggy address: [ 91.567276] ffff88800f89d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 91.568131] ffff88800f89d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 91.568995] >ffff88800f89d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 91.569836] ^ [ 91.570677] ffff88800f89d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 91.571524] ffff88800f89d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.572367] ================================================================== [ 91.573316] Disabling lock debugging due to kernel taint [ 93.452242] BUG: Bad rss-counter state mm:000000002d560c7d type:MM_FILEPAGES val:33 [ 93.453865] BUG: Bad rss-counter state mm:000000002d560c7d type:MM_ANONPAGES val:22 [ 93.894538] BUG: Bad rss-counter state mm:00000000264c4509 type:MM_FILEPAGES val:33 [ 93.895623] BUG: Bad rss-counter state mm:00000000264c4509 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6906' (ECDSA) to the list of known hosts. 2023/06/21 04:12:13 fuzzer started 2023/06/21 04:12:13 dialing manager at localhost:36067 2023/06/21 04:12:13 checking machine... 2023/06/21 04:12:13 checking revisions... [ 94.626662] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:12:13 testing simple program... [ 94.677925] cgroup: Unknown subsys name 'net' [ 94.731809] cgroup: Unknown subsys name 'rlimit' [ 97.123874] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) executing program executing program executing program VM DIAGNOSIS: 04:12:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019f2f3e8 RSP=ffff888019f2f320 R8 =ffffffff860d825a R9 =ffff888019f2f3d0 R10=0000000000038001 R11=0000000000010b8d R12=ffff888019f2f3f0 R13=ffff888019f2f3d8 R14=ffff888019f2f4c8 R15=ffff888019f2f390 RIP=ffffffff81131171 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 00007f9ddbf96900 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=00007f9ddc54d618 CR3=000000000d5d8000 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=1ffffffff0bbfc09 RBX=ffffffff85dfe048 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88806cf099e0 R8 =ffffffff86138eb0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe060 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 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=00007fe0deac2200 CR3=000000000d4b8000 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=707527435dbeddb5864b038017764ef8 XMM02=000000000011ac38eff9b2d0a8fce9cb XMM03=000000000011ad082c67c8bc2e329bc3 XMM04=91704e57d5abefbf00000000000ae988 XMM05=d455a0d60059a2280000000000132330 XMM06=993088549562ad030000000000131060 XMM07=e042d86d42eb936e0000000000121928 XMM08=b0822e93309ed42e000000000011ad08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000