syzkaller login: [ 30.879946] BUG: Bad rss-counter state mm:00000000c773352e type:MM_FILEPAGES val:33 [ 30.881088] BUG: Bad rss-counter state mm:00000000c773352e type:MM_ANONPAGES val:22 [ 31.044741] ================================================================== [ 31.045692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.046689] Read of size 8 at addr ffff88801598c310 by task sshd/219 [ 31.047491] [ 31.047724] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.048791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.049807] Call Trace: [ 31.050149] [ 31.050459] dump_stack_lvl+0x91/0xf0 [ 31.050966] print_report+0xcc/0x620 [ 31.051477] ? __virt_addr_valid+0x102/0x340 [ 31.052057] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052696] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053333] kasan_report+0xbe/0xf0 [ 31.053823] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054499] vma_interval_tree_remove+0xc75/0xec0 [ 31.055124] vma_prepare+0xc54/0x11a0 [ 31.055628] __split_vma+0x5af/0x950 [ 31.056118] ? __pfx___split_vma+0x10/0x10 [ 31.056668] ? find_held_lock+0x2c/0x110 [ 31.057206] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.057809] ? lock_is_held_type+0x9f/0x120 [ 31.058373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.059032] ? mtree_range_walk+0x632/0x900 [ 31.059606] ? mas_walk+0x5c7/0x7c0 [ 31.060096] do_vmi_munmap+0x1f1/0x2b0 [ 31.060617] mmap_region+0x1f9/0x2660 [ 31.061121] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.061652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.062395] ? __pfx_lock_acquire+0x10/0x10 [ 31.062980] ? __pfx_mmap_region+0x10/0x10 [ 31.063525] ? security_mmap_addr+0x7d/0xa0 [ 31.064076] ? get_unmapped_area+0x1f5/0x3f0 [ 31.064650] do_mmap+0x854/0xf00 [ 31.065107] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.065625] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.066201] ksys_mmap_pgoff+0x3af/0x500 [ 31.066752] do_syscall_64+0x3f/0x90 [ 31.067250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067929] RIP: 0033:0x7fa50f61bd82 [ 31.068408] 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 [ 31.070641] RSP: 002b:00007ffd9f646948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.071588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa50f61bd82 [ 31.072483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa50ea55000 [ 31.073367] RBP: 00007fa50ea55000 R08: 0000000000000009 R09: 0000000000001000 [ 31.074254] R10: 0000000000000812 R11: 0000000000000206 R12: 000056530e3ccec0 [ 31.075165] R13: 00007ffd9f646960 R14: 00007ffd9f646990 R15: 00007ffd9f646cf0 [ 31.076060] [ 31.076363] [ 31.076583] Allocated by task 212: [ 31.077032] kasan_save_stack+0x22/0x50 [ 31.077557] kasan_set_track+0x25/0x30 [ 31.078065] __kasan_slab_alloc+0x59/0x70 [ 31.078625] kmem_cache_alloc+0x16b/0x370 [ 31.079168] vm_area_dup+0x20/0x160 [ 31.079636] __split_vma+0x170/0x950 [ 31.080110] split_vma+0xc6/0x110 [ 31.080569] mprotect_fixup+0x8d2/0xb30 [ 31.081086] do_mprotect_pkey+0x87e/0xd40 [ 31.081632] __x64_sys_mprotect+0x78/0xc0 [ 31.082171] do_syscall_64+0x3f/0x90 [ 31.082685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.083356] [ 31.083581] Freed by task 212: [ 31.083985] kasan_save_stack+0x22/0x50 [ 31.084505] kasan_set_track+0x25/0x30 [ 31.085015] kasan_save_free_info+0x2b/0x50 [ 31.085568] __kasan_slab_free+0x10a/0x190 [ 31.086112] kmem_cache_free+0x10d/0x4d0 [ 31.086662] rcu_core+0x8c8/0x2860 [ 31.087115] __do_softirq+0x1b7/0x7d4 [ 31.087607] [ 31.087827] Last potentially related work creation: [ 31.088425] kasan_save_stack+0x22/0x50 [ 31.089030] __kasan_record_aux_stack+0x8e/0xa0 [ 31.089641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.090301] remove_vma+0x139/0x170 [ 31.090782] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.091357] do_vmi_munmap+0x1f1/0x2b0 [ 31.091864] __vm_munmap+0x138/0x3a0 [ 31.092343] __x64_sys_munmap+0x59/0x80 [ 31.092854] do_syscall_64+0x3f/0x90 [ 31.093340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094012] [ 31.094234] The buggy address belongs to the object at ffff88801598c2b8 [ 31.094234] which belongs to the cache vm_area_struct of size 168 [ 31.095766] The buggy address is located 88 bytes inside of [ 31.095766] freed 168-byte region [ffff88801598c2b8, ffff88801598c360) [ 31.097232] [ 31.097454] The buggy address belongs to the physical page: [ 31.098135] page:000000001265d283 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1598c [ 31.099293] memcg:ffff888016ecf501 [ 31.099741] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.100408] page_type: 0xffffffff() [ 31.100884] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.101839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ecf501 [ 31.102804] page dumped because: kasan: bad access detected [ 31.103487] [ 31.103716] Memory state around the buggy address: [ 31.104320] ffff88801598c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.105202] ffff88801598c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.106102] >ffff88801598c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.106998] ^ [ 31.107486] ffff88801598c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.108364] ffff88801598c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.109254] ================================================================== [ 31.110219] Disabling lock debugging due to kernel taint [ 33.289622] BUG: Bad rss-counter state mm:000000000c0d5a5b type:MM_FILEPAGES val:33 [ 33.291340] BUG: Bad rss-counter state mm:000000000c0d5a5b type:MM_ANONPAGES val:22 [ 33.825637] BUG: Bad rss-counter state mm:00000000c8f3962c type:MM_FILEPAGES val:33 [ 33.826628] BUG: Bad rss-counter state mm:00000000c8f3962c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12020' (ECDSA) to the list of known hosts. 2023/06/20 18:37:22 fuzzer started 2023/06/20 18:37:22 dialing manager at localhost:36067 2023/06/20 18:37:22 checking machine... 2023/06/20 18:37:22 checking revisions... [ 34.491538] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:37:23 testing simple program... [ 34.547334] cgroup: Unknown subsys name 'net' [ 34.608078] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:37:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffc2a73bc08 CR3=0000000005482000 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=00007fbde2a94510000055edcf22d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000012 RBX=0000000000000002 RCX=ffffffff8451105d RDX=0000000000000012 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffff88806cf09ac0 RSP=ffff88806cf099c0 R8 =ffffffff864b2f26 R9 =ffff88806cf09aa8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f61c R13=ffff88806cf09ab0 R14=ffff88806cf09aa9 R15=ffff88806cf09a68 RIP=ffffffff8112fc21 RFL=00000206 [-----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 00007f053b48e900 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=00007f053ba45618 CR3=000000000c532000 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