syzkaller login: [ 30.045340] BUG: Bad rss-counter state mm:000000000f5ceef4 type:MM_FILEPAGES val:33 [ 30.046767] BUG: Bad rss-counter state mm:000000000f5ceef4 type:MM_ANONPAGES val:22 [ 30.080060] ================================================================== [ 30.080658] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.081387] Read of size 8 at addr ffff8880186013f8 by task sshd/221 [ 30.081981] [ 30.082151] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.082814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.083567] Call Trace: [ 30.083811] [ 30.084031] dump_stack_lvl+0x91/0xf0 [ 30.084411] print_report+0xcc/0x620 [ 30.084789] ? __virt_addr_valid+0x102/0x340 [ 30.085201] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.085719] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.086196] kasan_report+0xbe/0xf0 [ 30.086562] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.087047] vma_interval_tree_remove+0xc75/0xec0 [ 30.087533] vma_prepare+0xc54/0x11a0 [ 30.087903] __split_vma+0x5af/0x950 [ 30.088266] ? __pfx___split_vma+0x10/0x10 [ 30.088686] ? find_held_lock+0x2c/0x110 [ 30.088988] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.089314] ? lock_is_held_type+0x9f/0x120 [ 30.089632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.089982] ? mtree_range_walk+0x632/0x900 [ 30.090306] ? mas_walk+0x5c7/0x7c0 [ 30.090587] do_vmi_munmap+0x1f1/0x2b0 [ 30.090879] mmap_region+0x1f9/0x2660 [ 30.091161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.091465] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.091885] ? __pfx_lock_acquire+0x10/0x10 [ 30.092198] ? __pfx_mmap_region+0x10/0x10 [ 30.092518] ? security_mmap_addr+0x7d/0xa0 [ 30.092834] ? get_unmapped_area+0x1f5/0x3f0 [ 30.093153] do_mmap+0x854/0xf00 [ 30.093412] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.093707] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.094041] ksys_mmap_pgoff+0x3af/0x500 [ 30.094340] do_syscall_64+0x3f/0x90 [ 30.094618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.094996] RIP: 0033:0x7f2c08272d82 [ 30.095270] 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 [ 30.096535] RSP: 002b:00007ffe42926228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.097072] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c08272d82 [ 30.097586] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c076ac000 [ 30.098085] RBP: 00007f2c076ac000 R08: 0000000000000009 R09: 0000000000001000 [ 30.098594] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc322b2b20 [ 30.099105] R13: 00007ffe42926240 R14: 00007ffe42926270 R15: 00007ffe429265d0 [ 30.099619] [ 30.099791] [ 30.099911] Allocated by task 214: [ 30.100168] kasan_save_stack+0x22/0x50 [ 30.100474] kasan_set_track+0x25/0x30 [ 30.100762] __kasan_slab_alloc+0x59/0x70 [ 30.101066] kmem_cache_alloc+0x16b/0x370 [ 30.101375] vm_area_dup+0x20/0x160 [ 30.101648] __split_vma+0x170/0x950 [ 30.101916] split_vma+0xc6/0x110 [ 30.102174] mprotect_fixup+0x8d2/0xb30 [ 30.102470] do_mprotect_pkey+0x87e/0xd40 [ 30.102772] __x64_sys_mprotect+0x78/0xc0 [ 30.103071] do_syscall_64+0x3f/0x90 [ 30.103351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.103730] [ 30.103855] Freed by task 203: [ 30.104087] kasan_save_stack+0x22/0x50 [ 30.104382] kasan_set_track+0x25/0x30 [ 30.104668] kasan_save_free_info+0x2b/0x50 [ 30.104968] __kasan_slab_free+0x10a/0x190 [ 30.105287] kmem_cache_free+0x10d/0x4d0 [ 30.105589] rcu_core+0x8c8/0x2860 [ 30.105853] __do_softirq+0x1b7/0x7d4 [ 30.106136] [ 30.106262] Last potentially related work creation: [ 30.106614] kasan_save_stack+0x22/0x50 [ 30.106907] __kasan_record_aux_stack+0x8e/0xa0 [ 30.107241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.107617] remove_vma+0x139/0x170 [ 30.107881] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.108206] do_vmi_munmap+0x1f1/0x2b0 [ 30.108503] __vm_munmap+0x138/0x3a0 [ 30.108771] __x64_sys_munmap+0x59/0x80 [ 30.109057] do_syscall_64+0x3f/0x90 [ 30.109335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.109710] [ 30.109837] The buggy address belongs to the object at ffff8880186013a0 [ 30.109837] which belongs to the cache vm_area_struct of size 168 [ 30.110718] The buggy address is located 88 bytes inside of [ 30.110718] freed 168-byte region [ffff8880186013a0, ffff888018601448) [ 30.111547] [ 30.111672] The buggy address belongs to the physical page: [ 30.112055] page:00000000379219e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18601 [ 30.112716] memcg:ffff88800df7d201 [ 30.112961] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.113345] page_type: 0xffffffff() [ 30.113619] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.114161] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df7d201 [ 30.114701] page dumped because: kasan: bad access detected [ 30.115090] [ 30.115211] Memory state around the buggy address: [ 30.115561] ffff888018601280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.116070] ffff888018601300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.116582] >ffff888018601380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.117087] ^ [ 30.117595] ffff888018601400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.118099] ffff888018601480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.118615] ================================================================== [ 30.119229] Disabling lock debugging due to kernel taint [ 32.045106] BUG: Bad rss-counter state mm:00000000e27bfcdf type:MM_FILEPAGES val:33 [ 32.046309] BUG: Bad rss-counter state mm:00000000e27bfcdf type:MM_ANONPAGES val:22 [ 32.475096] BUG: Bad rss-counter state mm:000000002ef565a9 type:MM_FILEPAGES val:33 [ 32.476268] BUG: Bad rss-counter state mm:000000002ef565a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38661' (ECDSA) to the list of known hosts. 2023/06/20 13:56:45 fuzzer started 2023/06/20 13:56:45 dialing manager at localhost:36067 2023/06/20 13:56:45 checking machine... 2023/06/20 13:56:45 checking revisions... [ 33.221400] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:56:45 testing simple program... [ 33.273456] cgroup: Unknown subsys name 'net' [ 33.316658] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:56:45 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09e01 RSI=ffff88806ce09e38 RDI=ffff88806ce09a30 RBP=ffff88806ce09a78 RSP=ffff88806ce099b0 R8 =ffffffff8609de4a R9 =ffff88806ce09a60 R10=0000000000038001 R11=0000000000007035 R12=ffff88806ce09a80 R13=ffff88806ce09a68 R14=ffff88806ce09e40 R15=ffff88806ce09a20 RIP=ffffffff81131028 RFL=00000292 [--S-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 00007f1c297c8900 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=00007f1c28c28798 CR3=000000000ca26000 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=a2c12378cf61eeaeb446dd92d47ec781 XMM02=eff9b2d0a8fce9cb000000000011a610 XMM03=2c67c8bc2e329bc3000000000011a738 XMM04=339017c4e72c8efd00000000000ae988 XMM05=6e6c3667fb9400d60000000000132a88 XMM06=c291bd5c70af25b90000000000131878 XMM07=fb795ef6d65770560000000000121ba0 XMM08=2c67c8bc2e329bc3000000000011a738 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000325e00 RBX=ffff88800c978d10 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782f8 RDI=ffff88800844f780 RBP=ffff88806cf09e58 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800844f780 R13=ffff88808c978d10 R14=ffffffff813782f8 R15=ffff88800c978d90 RIP=ffffffff81809a4f RFL=00000286 [--S--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 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=00007ffe9d85f428 CR3=000000000daba000 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=2034343a36353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a36353a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000