syzkaller login: [ 32.207966] BUG: Bad rss-counter state mm:00000000f6ef73fd type:MM_FILEPAGES val:33 [ 32.209577] BUG: Bad rss-counter state mm:00000000f6ef73fd type:MM_ANONPAGES val:22 [ 32.365558] ================================================================== [ 32.366513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.367512] Read of size 8 at addr ffff88800e38ac20 by task sshd/219 [ 32.368352] [ 32.368583] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.369546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.370567] Call Trace: [ 32.370912] [ 32.371219] dump_stack_lvl+0x91/0xf0 [ 32.371749] print_report+0xcc/0x620 [ 32.372260] ? __virt_addr_valid+0x102/0x340 [ 32.372841] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.373491] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.374137] kasan_report+0xbe/0xf0 [ 32.374653] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.375338] vma_interval_tree_remove+0xc75/0xec0 [ 32.376012] vma_prepare+0xc54/0x11a0 [ 32.376535] __split_vma+0x5af/0x950 [ 32.377058] ? __pfx___split_vma+0x10/0x10 [ 32.377641] ? find_held_lock+0x2c/0x110 [ 32.378205] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.378824] ? lock_is_held_type+0x9f/0x120 [ 32.379413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.380103] ? mtree_range_walk+0x632/0x900 [ 32.380713] ? mas_walk+0x5c7/0x7c0 [ 32.381233] do_vmi_munmap+0x1f1/0x2b0 [ 32.381775] mmap_region+0x1f9/0x2660 [ 32.382305] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.382872] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.383653] ? __pfx_lock_acquire+0x10/0x10 [ 32.384243] ? __pfx_mmap_region+0x10/0x10 [ 32.384826] ? security_mmap_addr+0x7d/0xa0 [ 32.385416] ? get_unmapped_area+0x1f5/0x3f0 [ 32.386019] do_mmap+0x854/0xf00 [ 32.386498] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.387040] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.387664] ksys_mmap_pgoff+0x3af/0x500 [ 32.388225] do_syscall_64+0x3f/0x90 [ 32.388749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.389457] RIP: 0033:0x7f35ea36bd82 [ 32.389941] 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 [ 32.392198] RSP: 002b:00007ffdd7226b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.393144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35ea36bd82 [ 32.394037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35e97a5000 [ 32.394930] RBP: 00007f35e97a5000 R08: 0000000000000009 R09: 0000000000001000 [ 32.395827] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558acdb4ec0 [ 32.396725] R13: 00007ffdd7226ba0 R14: 00007ffdd7226bd0 R15: 00007ffdd7226f30 [ 32.397634] [ 32.397939] [ 32.398165] Allocated by task 212: [ 32.398625] kasan_save_stack+0x22/0x50 [ 32.399166] kasan_set_track+0x25/0x30 [ 32.399709] __kasan_slab_alloc+0x59/0x70 [ 32.400273] kmem_cache_alloc+0x16b/0x370 [ 32.400829] vm_area_dup+0x20/0x160 [ 32.401317] __split_vma+0x170/0x950 [ 32.401825] split_vma+0xc6/0x110 [ 32.402294] mprotect_fixup+0x8d2/0xb30 [ 32.402833] do_mprotect_pkey+0x87e/0xd40 [ 32.403403] __x64_sys_mprotect+0x78/0xc0 [ 32.403969] do_syscall_64+0x3f/0x90 [ 32.404477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.405173] [ 32.405399] Freed by task 212: [ 32.405812] kasan_save_stack+0x22/0x50 [ 32.406350] kasan_set_track+0x25/0x30 [ 32.406883] kasan_save_free_info+0x2b/0x50 [ 32.407456] __kasan_slab_free+0x10a/0x190 [ 32.408034] kmem_cache_free+0x10d/0x4d0 [ 32.408582] rcu_core+0x8c8/0x2860 [ 32.409062] __do_softirq+0x1b7/0x7d4 [ 32.409578] [ 32.409807] Last potentially related work creation: [ 32.410427] kasan_save_stack+0x22/0x50 [ 32.410966] __kasan_record_aux_stack+0x8e/0xa0 [ 32.411629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.412337] remove_vma+0x139/0x170 [ 32.412832] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.413450] do_vmi_munmap+0x1f1/0x2b0 [ 32.413986] __vm_munmap+0x138/0x3a0 [ 32.414497] __x64_sys_munmap+0x59/0x80 [ 32.415045] do_syscall_64+0x3f/0x90 [ 32.415570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.416274] [ 32.416512] The buggy address belongs to the object at ffff88800e38abc8 [ 32.416512] which belongs to the cache vm_area_struct of size 168 [ 32.418112] The buggy address is located 88 bytes inside of [ 32.418112] freed 168-byte region [ffff88800e38abc8, ffff88800e38ac70) [ 32.419698] [ 32.419938] The buggy address belongs to the physical page: [ 32.420656] page:000000009ecc00e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe38a [ 32.421834] memcg:ffff888019cee201 [ 32.422293] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.423001] page_type: 0xffffffff() [ 32.423491] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.424501] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cee201 [ 32.425500] page dumped because: kasan: bad access detected [ 32.426221] [ 32.426463] Memory state around the buggy address: [ 32.427098] ffff88800e38ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.428046] ffff88800e38ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.428985] >ffff88800e38ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.429904] ^ [ 32.430478] ffff88800e38ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.431417] ffff88800e38ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.432348] ================================================================== [ 32.433532] Disabling lock debugging due to kernel taint [ 34.572872] BUG: Bad rss-counter state mm:00000000ef8a152f type:MM_FILEPAGES val:33 [ 34.574150] BUG: Bad rss-counter state mm:00000000ef8a152f type:MM_ANONPAGES val:22 [ 34.994957] BUG: Bad rss-counter state mm:00000000e49688cc type:MM_FILEPAGES val:33 [ 34.996175] BUG: Bad rss-counter state mm:00000000e49688cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4550' (ECDSA) to the list of known hosts. 2023/06/19 22:56:55 fuzzer started 2023/06/19 22:56:55 dialing manager at localhost:44161 2023/06/19 22:56:55 checking machine... 2023/06/19 22:56:55 checking revisions... [ 35.684942] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:56:55 testing simple program... [ 35.732450] cgroup: Unknown subsys name 'net' [ 35.775027] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:56:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000016 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81f2cc16 RDI=ffffffff849c4698 RBP=0000000000000003 RSP=ffff8880164bfaa8 R8 =0000000000000005 R9 =0000000000000044 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880164bfb40 R13=dffffc0000000000 R14=0000000000000012 R15=ffff88800e0d8c80 RIP=ffffffff81f2cc39 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 00007f0024533900 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=00007f0024aea618 CR3=0000000009540000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f17018d6ee0 CR3=0000000009f82000 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=2034353a36353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a36353a3232203931 XMM08=69767265732e4079747465672f6d6574 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000