syzkaller login: [ 40.359928] BUG: Bad rss-counter state mm:000000005d356f5e type:MM_FILEPAGES val:33 [ 40.360716] BUG: Bad rss-counter state mm:000000005d356f5e type:MM_ANONPAGES val:22 [ 40.493358] ================================================================== [ 40.494267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.495194] Read of size 8 at addr ffff88800de4f140 by task sshd/219 [ 40.495960] [ 40.496289] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.497159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.498155] Call Trace: [ 40.498488] <TASK> [ 40.498771] dump_stack_lvl+0x91/0xf0 [ 40.499258] print_report+0xcc/0x620 [ 40.499741] ? __virt_addr_valid+0x102/0x340 [ 40.500287] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.500900] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.501511] kasan_report+0xbe/0xf0 [ 40.502001] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.502631] vma_interval_tree_remove+0xc75/0xec0 [ 40.503226] vma_prepare+0xc54/0x11a0 [ 40.503703] __split_vma+0x5af/0x950 [ 40.504169] ? __pfx___split_vma+0x10/0x10 [ 40.504695] ? find_held_lock+0x2c/0x110 [ 40.505213] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.505784] ? lock_is_held_type+0x9f/0x120 [ 40.506313] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.506912] ? mtree_range_walk+0x632/0x900 [ 40.507459] ? mas_walk+0x5c7/0x7c0 [ 40.507924] do_vmi_munmap+0x1f1/0x2b0 [ 40.508409] mmap_region+0x1f9/0x2660 [ 40.508885] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.509390] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.510120] ? __pfx_lock_acquire+0x10/0x10 [ 40.510654] ? __pfx_mmap_region+0x10/0x10 [ 40.511182] ? security_mmap_addr+0x7d/0xa0 [ 40.511709] ? get_unmapped_area+0x1f5/0x3f0 [ 40.512249] do_mmap+0x854/0xf00 [ 40.512691] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.513176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.513746] ksys_mmap_pgoff+0x3af/0x500 [ 40.514252] do_syscall_64+0x3f/0x90 [ 40.514730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.515370] RIP: 0033:0x7fccff60dd82 [ 40.515821] 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 [ 40.517936] RSP: 002b:00007ffe16108f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.518828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccff60dd82 [ 40.519669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccfea47000 [ 40.520505] RBP: 00007fccfea47000 R08: 0000000000000009 R09: 0000000000001000 [ 40.521349] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569b1bc7d90 [ 40.522196] R13: 00007ffe16108f40 R14: 00007ffe16108f70 R15: 00007ffe161092d0 [ 40.523043] </TASK> [ 40.523330] [ 40.523551] Allocated by task 212: [ 40.523976] kasan_save_stack+0x22/0x50 [ 40.524476] kasan_set_track+0x25/0x30 [ 40.524968] __kasan_slab_alloc+0x59/0x70 [ 40.525486] kmem_cache_alloc+0x16b/0x370 [ 40.526027] vm_area_dup+0x20/0x160 [ 40.526481] __split_vma+0x170/0x950 [ 40.526947] split_vma+0xc6/0x110 [ 40.527384] mprotect_fixup+0x8d2/0xb30 [ 40.527885] do_mprotect_pkey+0x87e/0xd40 [ 40.528397] __x64_sys_mprotect+0x78/0xc0 [ 40.528917] do_syscall_64+0x3f/0x90 [ 40.529386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.530035] [ 40.530249] Freed by task 19: [ 40.530634] kasan_save_stack+0x22/0x50 [ 40.531136] kasan_set_track+0x25/0x30 [ 40.531626] kasan_save_free_info+0x2b/0x50 [ 40.532151] __kasan_slab_free+0x10a/0x190 [ 40.532682] kmem_cache_free+0x10d/0x4d0 [ 40.533184] rcu_core+0x8c8/0x2860 [ 40.533629] __do_softirq+0x1b7/0x7d4 [ 40.534102] [ 40.534314] Last potentially related work creation: [ 40.534900] kasan_save_stack+0x22/0x50 [ 40.535398] __kasan_record_aux_stack+0x8e/0xa0 [ 40.535974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.536611] remove_vma+0x139/0x170 [ 40.537061] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.537633] do_vmi_munmap+0x1f1/0x2b0 [ 40.538115] __vm_munmap+0x138/0x3a0 [ 40.538579] __x64_sys_munmap+0x59/0x80 [ 40.539070] do_syscall_64+0x3f/0x90 [ 40.539537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.540175] [ 40.540387] Second to last potentially related work creation: [ 40.541059] kasan_save_stack+0x22/0x50 [ 40.541567] __kasan_record_aux_stack+0x8e/0xa0 [ 40.542141] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.542771] remove_vma+0x139/0x170 [ 40.543218] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.543766] do_vmi_munmap+0x1f1/0x2b0 [ 40.544249] mmap_region+0x1f9/0x2660 [ 40.544722] do_mmap+0x854/0xf00 [ 40.545154] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.545741] ksys_mmap_pgoff+0x3af/0x500 [ 40.546236] do_syscall_64+0x3f/0x90 [ 40.546707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.547340] [ 40.547553] The buggy address belongs to the object at ffff88800de4f0e8 [ 40.547553] which belongs to the cache vm_area_struct of size 168 [ 40.548995] The buggy address is located 88 bytes inside of [ 40.548995] freed 168-byte region [ffff88800de4f0e8, ffff88800de4f190) [ 40.550414] [ 40.550626] The buggy address belongs to the physical page: [ 40.551279] page:00000000b8da2d35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde4f [ 40.552349] memcg:ffff88800ce82401 [ 40.552771] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.553413] page_type: 0xffffffff() [ 40.553867] raw: 0100000000000200 ffff88800879fc80 ffffea0000391fc0 dead000000000002 [ 40.554777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce82401 [ 40.555676] page dumped because: kasan: bad access detected [ 40.556327] [ 40.556543] Memory state around the buggy address: [ 40.557116] ffff88800de4f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.557977] ffff88800de4f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 40.558833] >ffff88800de4f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.559685] ^ [ 40.560310] ffff88800de4f180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 40.561157] ffff88800de4f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.562011] ================================================================== [ 40.563049] Disabling lock debugging due to kernel taint [ 43.317905] BUG: Bad rss-counter state mm:00000000fb88b853 type:MM_FILEPAGES val:33 [ 43.319061] BUG: Bad rss-counter state mm:00000000fb88b853 type:MM_ANONPAGES val:22 [ 43.694123] BUG: Bad rss-counter state mm:0000000051b24ac4 type:MM_FILEPAGES val:33 [ 43.695456] BUG: Bad rss-counter state mm:0000000051b24ac4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21831' (ECDSA) to the list of known hosts. 2023/06/20 03:39:30 fuzzer started 2023/06/20 03:39:31 dialing manager at localhost:44161 2023/06/20 03:39:31 checking machine... 2023/06/20 03:39:31 checking revisions... [ 44.433403] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:39:31 testing simple program... [ 44.484703] cgroup: Unknown subsys name 'net' [ 44.525797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:39:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ca58c00 RCX=0000000000000000 RDX=ffff8880147c9b40 RSI=ffffffff8199b065 RDI=ffff88800ca58d40 RBP=ffff88800ced4600 RSP=ffff8880147afc88 R8 =0000000000000001 R9 =ffffed10028f5f79 R10=0000000000000003 R11=0000000000000000 R12=ffff8880147afd88 R13=ffff88800ced4620 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff845306f4 RFL=00000082 [--S----] 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 00007f857358b900 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=00007f8572a11a00 CR3=000000000d5ca000 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=5e4e498058d2c6acd844db95402e7f83 XMM02=eff9b2d0a8fce9cb0000000000120530 XMM03=2c67c8bc2e329bc30000000000120658 XMM04=3d720f62b0ba47d600000000000ae988 XMM05=2c8b21e86491dfe90000000000138048 XMM06=c291bd5c70af25b90000000000136e38 XMM07=fb795ef6d65770560000000000125990 XMM08=2c67c8bc2e329bc30000000000120658 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff84493a77 RDI=0000000000000001 RBP=ffffffff84e39aa0 RSP=ffff88801876f4b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88801876fe70 R13=ffff88801876fe70 R14=ffff88801876fea9 R15=0000000000000002 RIP=ffffffff8135b910 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 00007ffbfd0b7900 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=00007ffbfd05c008 CR3=000000001768c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000