syzkaller login: [ 30.535402] BUG: Bad rss-counter state mm:00000000ec736324 type:MM_FILEPAGES val:33 [ 30.536472] BUG: Bad rss-counter state mm:00000000ec736324 type:MM_ANONPAGES val:22 [ 30.702707] ================================================================== [ 30.703592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.704486] Read of size 8 at addr ffff88801633e228 by task sshd/219 [ 30.705278] [ 30.705528] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.706331] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.707244] Call Trace: [ 30.707561] [ 30.707845] dump_stack_lvl+0x91/0xf0 [ 30.708312] print_report+0xcc/0x620 [ 30.708770] ? __virt_addr_valid+0x102/0x340 [ 30.709295] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709879] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710456] kasan_report+0xbe/0xf0 [ 30.710911] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711498] vma_interval_tree_remove+0xc75/0xec0 [ 30.712186] vma_prepare+0xc54/0x11a0 [ 30.712751] __split_vma+0x5af/0x950 [ 30.713307] ? __pfx___split_vma+0x10/0x10 [ 30.713932] ? find_held_lock+0x2c/0x110 [ 30.714544] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.715213] ? lock_is_held_type+0x9f/0x120 [ 30.715874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.716592] ? mtree_range_walk+0x632/0x900 [ 30.717245] ? mas_walk+0x5c7/0x7c0 [ 30.717804] do_vmi_munmap+0x1f1/0x2b0 [ 30.718389] mmap_region+0x1f9/0x2660 [ 30.718957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.719592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.720439] ? __pfx_lock_acquire+0x10/0x10 [ 30.721071] ? __pfx_mmap_region+0x10/0x10 [ 30.721692] ? security_mmap_addr+0x7d/0xa0 [ 30.722322] ? get_unmapped_area+0x1f5/0x3f0 [ 30.722971] do_mmap+0x854/0xf00 [ 30.723484] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.724086] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.724751] ksys_mmap_pgoff+0x3af/0x500 [ 30.725344] do_syscall_64+0x3f/0x90 [ 30.725910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.726674] RIP: 0033:0x7f9002830d82 [ 30.727210] 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 [ 30.729748] RSP: 002b:00007ffe9b897668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.730819] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9002830d82 [ 30.731856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9001c6a000 [ 30.732856] RBP: 00007f9001c6a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.733858] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634ef272ec0 [ 30.734859] R13: 00007ffe9b897680 R14: 00007ffe9b8976b0 R15: 00007ffe9b897a10 [ 30.735901] [ 30.736244] [ 30.736494] Allocated by task 212: [ 30.737001] kasan_save_stack+0x22/0x50 [ 30.737594] kasan_set_track+0x25/0x30 [ 30.738176] __kasan_slab_alloc+0x59/0x70 [ 30.738793] kmem_cache_alloc+0x16b/0x370 [ 30.739399] vm_area_dup+0x20/0x160 [ 30.739970] __split_vma+0x170/0x950 [ 30.740519] split_vma+0xc6/0x110 [ 30.741035] mprotect_fixup+0x8d2/0xb30 [ 30.741626] do_mprotect_pkey+0x87e/0xd40 [ 30.742238] __x64_sys_mprotect+0x78/0xc0 [ 30.742851] do_syscall_64+0x3f/0x90 [ 30.743409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.744186] [ 30.744438] Freed by task 19: [ 30.744888] kasan_save_stack+0x22/0x50 [ 30.745477] kasan_set_track+0x25/0x30 [ 30.746058] kasan_save_free_info+0x2b/0x50 [ 30.746685] __kasan_slab_free+0x10a/0x190 [ 30.747309] kmem_cache_free+0x10d/0x4d0 [ 30.747938] rcu_core+0x8c8/0x2860 [ 30.748462] __do_softirq+0x1b7/0x7d4 [ 30.749031] [ 30.749282] Last potentially related work creation: [ 30.749972] kasan_save_stack+0x22/0x50 [ 30.750565] __kasan_record_aux_stack+0x8e/0xa0 [ 30.751241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.752024] remove_vma+0x139/0x170 [ 30.752558] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.753214] do_vmi_munmap+0x1f1/0x2b0 [ 30.753787] __vm_munmap+0x138/0x3a0 [ 30.754337] __x64_sys_munmap+0x59/0x80 [ 30.754924] do_syscall_64+0x3f/0x90 [ 30.755482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756267] [ 30.756518] The buggy address belongs to the object at ffff88801633e1d0 [ 30.756518] which belongs to the cache vm_area_struct of size 168 [ 30.758252] The buggy address is located 88 bytes inside of [ 30.758252] freed 168-byte region [ffff88801633e1d0, ffff88801633e278) [ 30.759945] [ 30.760197] The buggy address belongs to the physical page: [ 30.760976] page:00000000420fa61f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1633e [ 30.762266] memcg:ffff88800f749601 [ 30.762768] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.763539] page_type: 0xffffffff() [ 30.764086] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.765169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f749601 [ 30.766235] page dumped because: kasan: bad access detected [ 30.767017] [ 30.767269] Memory state around the buggy address: [ 30.767977] ffff88801633e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.768984] ffff88801633e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.769987] >ffff88801633e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.770986] ^ [ 30.771664] ffff88801633e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.772675] ffff88801633e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.773676] ================================================================== [ 30.774851] Disabling lock debugging due to kernel taint [ 33.364040] BUG: Bad rss-counter state mm:00000000faaac155 type:MM_FILEPAGES val:33 [ 33.365199] BUG: Bad rss-counter state mm:00000000faaac155 type:MM_ANONPAGES val:22 [ 33.817901] BUG: Bad rss-counter state mm:00000000525a55f0 type:MM_FILEPAGES val:33 [ 33.819091] BUG: Bad rss-counter state mm:00000000525a55f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16358' (ECDSA) to the list of known hosts. 2023/06/20 11:19:29 fuzzer started 2023/06/20 11:19:29 dialing manager at localhost:36067 2023/06/20 11:19:29 checking machine... 2023/06/20 11:19:29 checking revisions... [ 34.540016] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:19:29 testing simple program... [ 34.591191] cgroup: Unknown subsys name 'net' [ 34.643519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:19:29 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535fa3 RSP=ffff8880147b7e20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880147723b8 R13=ffff888014771b40 R14=0000000000000001 R15=ffff88800c9fa000 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007f59a6257900 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=00007fb7051e2650 CR3=000000000d73a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=af4e3659df67e17400000000000ae988 XMM05=f28eb0a809132a370000000000132990 XMM06=dfcdbad4f1609c370000000000131828 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138976 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff86138978 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff81131204 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 00007fb704c2d900 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=00007fb7051e4618 CR3=000000000e0a6000 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=563412feff00545000000000000080fe 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