syzkaller login: [ 29.582600] BUG: Bad rss-counter state mm:000000007564e580 type:MM_FILEPAGES val:33 [ 29.583217] BUG: Bad rss-counter state mm:000000007564e580 type:MM_ANONPAGES val:22 [ 29.758565] ================================================================== [ 29.759762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.761012] Read of size 8 at addr ffff88800dcb2a50 by task sshd/220 [ 29.762115] [ 29.762391] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.763543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.764839] Call Trace: [ 29.765260] [ 29.765630] dump_stack_lvl+0x91/0xf0 [ 29.766265] print_report+0xcc/0x620 [ 29.766915] ? __virt_addr_valid+0x102/0x340 [ 29.767642] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.768455] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.769267] kasan_report+0xbe/0xf0 [ 29.769879] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.770698] vma_interval_tree_remove+0xc75/0xec0 [ 29.771511] vma_prepare+0xc54/0x11a0 [ 29.772136] __split_vma+0x5af/0x950 [ 29.772764] ? __pfx___split_vma+0x10/0x10 [ 29.773469] ? find_held_lock+0x2c/0x110 [ 29.774152] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.774923] ? lock_is_held_type+0x9f/0x120 [ 29.775624] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.776411] ? mtree_range_walk+0x632/0x900 [ 29.777131] ? mas_walk+0x5c7/0x7c0 [ 29.777760] do_vmi_munmap+0x1f1/0x2b0 [ 29.778402] mmap_region+0x1f9/0x2660 [ 29.779042] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.779700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.780654] ? __pfx_lock_acquire+0x10/0x10 [ 29.781344] ? __pfx_mmap_region+0x10/0x10 [ 29.782040] ? security_mmap_addr+0x7d/0xa0 [ 29.782732] ? get_unmapped_area+0x1f5/0x3f0 [ 29.783498] do_mmap+0x854/0xf00 [ 29.784005] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.784517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.785090] ksys_mmap_pgoff+0x3af/0x500 [ 29.785619] do_syscall_64+0x3f/0x90 [ 29.786107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.786776] RIP: 0033:0x7f647851cd82 [ 29.787244] 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 [ 29.789442] RSP: 002b:00007fff4eb9db08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.790406] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f647851cd82 [ 29.791363] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6477956000 [ 29.792281] RBP: 00007f6477956000 R08: 0000000000000009 R09: 0000000000001000 [ 29.793199] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b57468aec0 [ 29.794132] R13: 00007fff4eb9db20 R14: 00007fff4eb9db50 R15: 00007fff4eb9deb0 [ 29.795070] [ 29.795382] [ 29.795612] Allocated by task 213: [ 29.796073] kasan_save_stack+0x22/0x50 [ 29.796610] kasan_set_track+0x25/0x30 [ 29.797137] __kasan_slab_alloc+0x59/0x70 [ 29.797696] kmem_cache_alloc+0x16b/0x370 [ 29.798250] vm_area_dup+0x20/0x160 [ 29.798741] __split_vma+0x170/0x950 [ 29.799242] split_vma+0xc6/0x110 [ 29.799713] mprotect_fixup+0x8d2/0xb30 [ 29.800251] do_mprotect_pkey+0x87e/0xd40 [ 29.800808] __x64_sys_mprotect+0x78/0xc0 [ 29.801372] do_syscall_64+0x3f/0x90 [ 29.801890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.802595] [ 29.802843] Freed by task 213: [ 29.803277] kasan_save_stack+0x22/0x50 [ 29.803823] kasan_set_track+0x25/0x30 [ 29.804351] kasan_save_free_info+0x2b/0x50 [ 29.804916] __kasan_slab_free+0x10a/0x190 [ 29.805483] kmem_cache_free+0x10d/0x4d0 [ 29.806034] rcu_core+0x8c8/0x2860 [ 29.806512] __do_softirq+0x1b7/0x7d4 [ 29.807034] [ 29.807265] Last potentially related work creation: [ 29.807881] kasan_save_stack+0x22/0x50 [ 29.808431] __kasan_record_aux_stack+0x8e/0xa0 [ 29.809044] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.809744] remove_vma+0x139/0x170 [ 29.810233] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.810847] do_vmi_munmap+0x1f1/0x2b0 [ 29.811371] __vm_munmap+0x138/0x3a0 [ 29.811874] __x64_sys_munmap+0x59/0x80 [ 29.812407] do_syscall_64+0x3f/0x90 [ 29.812915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.813606] [ 29.813836] The buggy address belongs to the object at ffff88800dcb29f8 [ 29.813836] which belongs to the cache vm_area_struct of size 168 [ 29.815411] The buggy address is located 88 bytes inside of [ 29.815411] freed 168-byte region [ffff88800dcb29f8, ffff88800dcb2aa0) [ 29.816931] [ 29.817166] The buggy address belongs to the physical page: [ 29.817910] page:000000001934d63f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcb2 [ 29.819131] memcg:ffff88800e109101 [ 29.819603] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.820326] page_type: 0xffffffff() [ 29.820839] raw: 0100000000000200 ffff8880087a0c80 ffffea0000363500 dead000000000002 [ 29.821865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e109101 [ 29.822896] page dumped because: kasan: bad access detected [ 29.823640] [ 29.823879] Memory state around the buggy address: [ 29.824525] ffff88800dcb2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.825472] ffff88800dcb2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.826428] >ffff88800dcb2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.827380] ^ [ 29.828155] ffff88800dcb2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.829105] ffff88800dcb2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.830007] ================================================================== [ 29.831155] Disabling lock debugging due to kernel taint [ 32.098458] BUG: Bad rss-counter state mm:00000000c291a07b type:MM_FILEPAGES val:33 [ 32.100310] BUG: Bad rss-counter state mm:00000000c291a07b type:MM_ANONPAGES val:22 [ 32.605578] BUG: Bad rss-counter state mm:0000000049c43ee7 type:MM_FILEPAGES val:33 [ 32.606605] BUG: Bad rss-counter state mm:0000000049c43ee7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2214' (ECDSA) to the list of known hosts. 2023/06/21 06:54:46 fuzzer started 2023/06/21 06:54:46 dialing manager at localhost:36067 2023/06/21 06:54:46 checking machine... 2023/06/21 06:54:46 checking revisions... [ 33.323637] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:54:46 testing simple program... [ 33.364899] cgroup: Unknown subsys name 'net' [ 33.392088] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:54:46 Registers: info registers vcpu 0 RAX=ffff88800e832b30 RBX=ffff888008d9fdc8 RCX=1ffff11001d06566 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008d9fdd8 RBP=0000000000000004 RSP=ffff888008d9fd30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008d9fdc8 R14=ffff88806ce35000 R15=ffff88800dccc080 RIP=ffffffff8137fcd4 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 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=00007f57fafb20a0 CR3=0000000010198000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d69a76d5404b890000000000000ae988 XMM05=d958ec53ccf191f700000000001331d8 XMM06=4fda316b135da52b0000000000131fc8 XMM07=fb795ef6d65770560000000000122260 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11003944f16 RCX=ffffffff83741bc6 RDX=ffff88800fc5b680 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff8880159c1500 RSP=ffff88801ca27888 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000300 R11=00000000000b6a61 R12=0000000000000006 R13=ffff888016b57a18 R14=ffff888016b57a00 R15=0000000000000002 RIP=ffffffff814c027c 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 00007f2d63cf5900 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=00007f2d642ac618 CR3=000000000d1c6000 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=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