syzkaller login: [ 31.562216] BUG: Bad rss-counter state mm:00000000316bea4a type:MM_FILEPAGES val:33 [ 31.562930] BUG: Bad rss-counter state mm:00000000316bea4a type:MM_ANONPAGES val:22 [ 31.689362] ================================================================== [ 31.690042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.690700] Read of size 8 at addr ffff8880102e4228 by task sshd/220 [ 31.691236] [ 31.691394] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.692001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.692644] Call Trace: [ 31.692866] [ 31.693081] dump_stack_lvl+0x91/0xf0 [ 31.693590] print_report+0xcc/0x620 [ 31.693933] ? __virt_addr_valid+0x102/0x340 [ 31.694301] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.694699] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.695091] kasan_report+0xbe/0xf0 [ 31.695409] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.695867] vma_interval_tree_remove+0xc75/0xec0 [ 31.696300] vma_prepare+0xc54/0x11a0 [ 31.696634] __split_vma+0x5af/0x950 [ 31.696960] ? __pfx___split_vma+0x10/0x10 [ 31.697369] ? find_held_lock+0x2c/0x110 [ 31.697729] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.698120] ? lock_is_held_type+0x9f/0x120 [ 31.698498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.698926] ? mtree_range_walk+0x632/0x900 [ 31.699304] ? mas_walk+0x5c7/0x7c0 [ 31.699642] do_vmi_munmap+0x1f1/0x2b0 [ 31.699973] mmap_region+0x1f9/0x2660 [ 31.700306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.700654] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.701164] ? __pfx_lock_acquire+0x10/0x10 [ 31.701523] ? __pfx_mmap_region+0x10/0x10 [ 31.701890] ? security_mmap_addr+0x7d/0xa0 [ 31.702258] ? get_unmapped_area+0x1f5/0x3f0 [ 31.702643] do_mmap+0x854/0xf00 [ 31.702944] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.703276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.703659] ksys_mmap_pgoff+0x3af/0x500 [ 31.704002] do_syscall_64+0x3f/0x90 [ 31.704342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.704801] RIP: 0033:0x7f07cd75ed82 [ 31.705171] 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 [ 31.706665] RSP: 002b:00007ffe622fa2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.707267] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07cd75ed82 [ 31.707812] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07ccb98000 [ 31.708372] RBP: 00007f07ccb98000 R08: 0000000000000009 R09: 0000000000001000 [ 31.708985] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585c6ddbf70 [ 31.709570] R13: 00007ffe622fa2d0 R14: 00007ffe622fa300 R15: 00007ffe622fa660 [ 31.710175] [ 31.710395] [ 31.710561] Allocated by task 213: [ 31.710896] kasan_save_stack+0x22/0x50 [ 31.711258] kasan_set_track+0x25/0x30 [ 31.711589] __kasan_slab_alloc+0x59/0x70 [ 31.711971] kmem_cache_alloc+0x16b/0x370 [ 31.712355] vm_area_dup+0x20/0x160 [ 31.712689] __split_vma+0x170/0x950 [ 31.713083] split_vma+0xc6/0x110 [ 31.713388] mprotect_fixup+0x8d2/0xb30 [ 31.713734] do_mprotect_pkey+0x87e/0xd40 [ 31.714108] __x64_sys_mprotect+0x78/0xc0 [ 31.714469] do_syscall_64+0x3f/0x90 [ 31.714800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.715258] [ 31.715416] Freed by task 19: [ 31.715690] kasan_save_stack+0x22/0x50 [ 31.716045] kasan_set_track+0x25/0x30 [ 31.716392] kasan_save_free_info+0x2b/0x50 [ 31.716765] __kasan_slab_free+0x10a/0x190 [ 31.718129] kmem_cache_free+0x10d/0x4d0 [ 31.718501] rcu_core+0x8c8/0x2860 [ 31.718794] __do_softirq+0x1b7/0x7d4 [ 31.719107] [ 31.719247] Last potentially related work creation: [ 31.719625] kasan_save_stack+0x22/0x50 [ 31.719956] __kasan_record_aux_stack+0x8e/0xa0 [ 31.720328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.720743] remove_vma+0x139/0x170 [ 31.721058] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.721423] do_vmi_munmap+0x1f1/0x2b0 [ 31.721740] __vm_munmap+0x138/0x3a0 [ 31.722042] __x64_sys_munmap+0x59/0x80 [ 31.722361] do_syscall_64+0x3f/0x90 [ 31.722692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.723116] [ 31.723253] The buggy address belongs to the object at ffff8880102e41d0 [ 31.723253] which belongs to the cache vm_area_struct of size 168 [ 31.724237] The buggy address is located 88 bytes inside of [ 31.724237] freed 168-byte region [ffff8880102e41d0, ffff8880102e4278) [ 31.725179] [ 31.725319] The buggy address belongs to the physical page: [ 31.725738] page:000000007d4cc10a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102e4 [ 31.726446] memcg:ffff888017f54201 [ 31.726748] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.727167] page_type: 0xffffffff() [ 31.727459] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.728093] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f54201 [ 31.728678] page dumped because: kasan: bad access detected [ 31.729117] [ 31.729256] Memory state around the buggy address: [ 31.729632] ffff8880102e4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.730181] ffff8880102e4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.730751] >ffff8880102e4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.731296] ^ [ 31.731678] ffff8880102e4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.732235] ffff8880102e4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.732813] ================================================================== [ 31.733495] Disabling lock debugging due to kernel taint [ 33.595168] BUG: Bad rss-counter state mm:00000000b69e88a5 type:MM_FILEPAGES val:33 [ 33.595851] BUG: Bad rss-counter state mm:00000000b69e88a5 type:MM_ANONPAGES val:22 [ 33.964022] BUG: Bad rss-counter state mm:000000000d703ea1 type:MM_FILEPAGES val:33 [ 33.964717] BUG: Bad rss-counter state mm:000000000d703ea1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40734' (ECDSA) to the list of known hosts. 2023/06/20 08:42:21 fuzzer started 2023/06/20 08:42:21 dialing manager at localhost:44161 2023/06/20 08:42:21 checking machine... 2023/06/20 08:42:21 checking revisions... [ 34.466424] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:42:21 testing simple program... [ 34.510241] cgroup: Unknown subsys name 'net' [ 34.545911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:42:19 Registers: info registers vcpu 0 RAX=ffffffff863dcb3b RBX=0000000000000001 RCX=ffffffff863dcb36 RDX=0000000000000000 RSI=1ffffffff0c7b967 RDI=ffffffff85fc0370 RBP=ffff8880168577a0 RSP=ffff8880168576d8 R8 =ffffffff863dcb36 R9 =ffff888016857788 R10=0000000000038001 R11=0000000000091be7 R12=ffff8880168577a8 R13=ffff888016857790 R14=ffff888016857789 R15=ffff888016857748 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007fa82e54e900 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=00007fa82eb05618 CR3=000000000e312000 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=ffffffff85d3d010 RBX=0000000000000001 RCX=ffffffff8153425b RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff812340b3 RSP=ffff888008d87a90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88806cf39518 R13=ffff88800f3d3680 R14=ffff88800f3d3b28 R15=ffff88806cf39500 RIP=ffffffff812d12f6 RFL=00000002 [-------] 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=00007f8b4f7eb5c0 CR3=000000000ee60000 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=2030323a32343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a32343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000