syzkaller login: [ 30.219218] BUG: Bad rss-counter state mm:000000003c6c59da type:MM_FILEPAGES val:33 [ 30.220444] BUG: Bad rss-counter state mm:000000003c6c59da type:MM_ANONPAGES val:22 [ 30.406455] ================================================================== [ 30.407544] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.408686] Read of size 8 at addr ffff88800e807a50 by task sshd/218 [ 30.409741] [ 30.409998] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.411022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.412191] Call Trace: [ 30.412485] [ 30.412753] dump_stack_lvl+0x91/0xf0 [ 30.413213] print_report+0xcc/0x620 [ 30.413664] ? __virt_addr_valid+0x102/0x340 [ 30.414176] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.414752] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.415320] kasan_report+0xbe/0xf0 [ 30.415783] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.416360] vma_interval_tree_remove+0xc75/0xec0 [ 30.416928] vma_prepare+0xc54/0x11a0 [ 30.417378] __split_vma+0x5af/0x950 [ 30.417819] ? __pfx___split_vma+0x10/0x10 [ 30.418307] ? find_held_lock+0x2c/0x110 [ 30.418791] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.419314] ? lock_is_held_type+0x9f/0x120 [ 30.419828] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.420400] ? mtree_range_walk+0x632/0x900 [ 30.420915] ? mas_walk+0x5c7/0x7c0 [ 30.421365] do_vmi_munmap+0x1f1/0x2b0 [ 30.421818] mmap_region+0x1f9/0x2660 [ 30.422268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.422746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.423412] ? __pfx_lock_acquire+0x10/0x10 [ 30.423941] ? __pfx_mmap_region+0x10/0x10 [ 30.424436] ? security_mmap_addr+0x7d/0xa0 [ 30.424933] ? get_unmapped_area+0x1f5/0x3f0 [ 30.425445] do_mmap+0x854/0xf00 [ 30.425849] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.426321] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.426844] ksys_mmap_pgoff+0x3af/0x500 [ 30.427316] do_syscall_64+0x3f/0x90 [ 30.427769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.428375] RIP: 0033:0x7fd9fca58d82 [ 30.428805] 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 [ 30.430830] RSP: 002b:00007ffe0795d588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.431694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9fca58d82 [ 30.432481] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9fbe92000 [ 30.433260] RBP: 00007fd9fbe92000 R08: 0000000000000009 R09: 0000000000001000 [ 30.434042] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e20d724d90 [ 30.434839] R13: 00007ffe0795d5a0 R14: 00007ffe0795d5d0 R15: 00007ffe0795d930 [ 30.435630] [ 30.435905] [ 30.436104] Allocated by task 211: [ 30.436504] kasan_save_stack+0x22/0x50 [ 30.436973] kasan_set_track+0x25/0x30 [ 30.437431] __kasan_slab_alloc+0x59/0x70 [ 30.437914] kmem_cache_alloc+0x16b/0x370 [ 30.438400] vm_area_dup+0x20/0x160 [ 30.438828] __split_vma+0x170/0x950 [ 30.439255] split_vma+0xc6/0x110 [ 30.439670] mprotect_fixup+0x8d2/0xb30 [ 30.440141] do_mprotect_pkey+0x87e/0xd40 [ 30.440624] __x64_sys_mprotect+0x78/0xc0 [ 30.441103] do_syscall_64+0x3f/0x90 [ 30.441539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.442132] [ 30.442335] Freed by task 211: [ 30.442694] kasan_save_stack+0x22/0x50 [ 30.443157] kasan_set_track+0x25/0x30 [ 30.443623] kasan_save_free_info+0x2b/0x50 [ 30.444146] __kasan_slab_free+0x10a/0x190 [ 30.444641] kmem_cache_free+0x10d/0x4d0 [ 30.445111] rcu_core+0x8c8/0x2860 [ 30.445530] __do_softirq+0x1b7/0x7d4 [ 30.445979] [ 30.446176] Last potentially related work creation: [ 30.446716] kasan_save_stack+0x22/0x50 [ 30.447192] __kasan_record_aux_stack+0x8e/0xa0 [ 30.447724] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.448325] remove_vma+0x139/0x170 [ 30.448738] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.449256] do_vmi_munmap+0x1f1/0x2b0 [ 30.449703] __vm_munmap+0x138/0x3a0 [ 30.450139] __x64_sys_munmap+0x59/0x80 [ 30.450593] do_syscall_64+0x3f/0x90 [ 30.451024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.451616] [ 30.451829] Second to last potentially related work creation: [ 30.452459] kasan_save_stack+0x22/0x50 [ 30.452926] __kasan_record_aux_stack+0x8e/0xa0 [ 30.453450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.454043] remove_vma+0x139/0x170 [ 30.454465] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.454980] do_vmi_munmap+0x1f1/0x2b0 [ 30.455428] mmap_region+0x1f9/0x2660 [ 30.455886] do_mmap+0x854/0xf00 [ 30.456281] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.456728] ksys_mmap_pgoff+0x3af/0x500 [ 30.457197] do_syscall_64+0x3f/0x90 [ 30.457638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.458236] [ 30.458433] The buggy address belongs to the object at ffff88800e8079f8 [ 30.458433] which belongs to the cache vm_area_struct of size 168 [ 30.459796] The buggy address is located 88 bytes inside of [ 30.459796] freed 168-byte region [ffff88800e8079f8, ffff88800e807aa0) [ 30.461084] [ 30.461287] The buggy address belongs to the physical page: [ 30.461903] page:00000000118725f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe807 [ 30.462899] memcg:ffff88800dec6901 [ 30.463293] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.463901] page_type: 0xffffffff() [ 30.464316] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356100 dead000000000004 [ 30.465163] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dec6901 [ 30.465993] page dumped because: kasan: bad access detected [ 30.466598] [ 30.466797] Memory state around the buggy address: [ 30.467334] ffff88800e807900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.468131] ffff88800e807980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.468913] >ffff88800e807a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.469705] ^ [ 30.470357] ffff88800e807a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.471162] ffff88800e807b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.471973] ================================================================== [ 30.473119] Disabling lock debugging due to kernel taint [ 32.932372] BUG: Bad rss-counter state mm:00000000499af366 type:MM_FILEPAGES val:33 [ 32.933359] BUG: Bad rss-counter state mm:00000000499af366 type:MM_ANONPAGES val:22 [ 33.397373] BUG: Bad rss-counter state mm:00000000ef747463 type:MM_FILEPAGES val:33 [ 33.398578] BUG: Bad rss-counter state mm:00000000ef747463 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48269' (ECDSA) to the list of known hosts. 2023/06/20 18:09:21 fuzzer started 2023/06/20 18:09:21 dialing manager at localhost:36067 2023/06/20 18:09:21 checking machine... 2023/06/20 18:09:21 checking revisions... [ 34.163250] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:09:21 testing simple program... [ 34.219544] cgroup: Unknown subsys name 'net' [ 34.280416] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:09:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8363b743 RCX=0000000000000001 RDX=1ffff11002d11f32 RSI=ffff88801688fef0 RDI=ffffffff8363b743 RBP=ffffffff8363b743 RSP=ffff88801688f8f0 R8 =0000000000000001 R9 =ffff88801688f978 R10=0000000000038001 R11=000000000008a966 R12=ffff88801688fa00 R13=0000000000000000 R14=ffff88800b3a3680 R15=0000000000000dc0 RIP=ffffffff811fc6f0 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 00007f4b13478900 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=00007f4b13a2f618 CR3=000000001c884000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff001659bd0 CR3=000000000d90c000 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=0175d4998cf9f5b04b47537ff1679b44 XMM02=000000000011d9a8eff9b2d0a8fce9cb XMM03=000000000011da782c67c8bc2e329bc3 XMM04=4cb558cd6c72780f00000000000ae988 XMM05=1fa332d07ea6083d0000000000133a50 XMM06=bdf2e299e47b49d50000000000132780 XMM07=e042d86d42eb936e0000000000121998 XMM08=3037a75edc5120ee000000000011da78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000