syzkaller login: [ 25.903776] BUG: Bad rss-counter state mm:00000000f1c868b8 type:MM_FILEPAGES val:33 [ 25.905842] BUG: Bad rss-counter state mm:00000000f1c868b8 type:MM_ANONPAGES val:22 [ 26.059271] ================================================================== [ 26.060231] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.061169] Read of size 8 at addr ffff88800e4696b0 by task sshd/220 [ 26.061948] [ 26.062172] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.063138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.064127] Call Trace: [ 26.064443] [ 26.064751] dump_stack_lvl+0x91/0xf0 [ 26.065249] print_report+0xcc/0x620 [ 26.065751] ? __virt_addr_valid+0x102/0x340 [ 26.066308] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.066930] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.067552] kasan_report+0xbe/0xf0 [ 26.068030] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.068658] vma_interval_tree_remove+0xc75/0xec0 [ 26.069269] vma_prepare+0xc54/0x11a0 [ 26.069763] __split_vma+0x5af/0x950 [ 26.070242] ? __pfx___split_vma+0x10/0x10 [ 26.070776] ? find_held_lock+0x2c/0x110 [ 26.071304] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.071871] ? lock_is_held_type+0x9f/0x120 [ 26.072413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.073035] ? mtree_range_walk+0x632/0x900 [ 26.073606] ? mas_walk+0x5c7/0x7c0 [ 26.074087] do_vmi_munmap+0x1f1/0x2b0 [ 26.074581] mmap_region+0x1f9/0x2660 [ 26.075064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.075581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.076301] ? __pfx_lock_acquire+0x10/0x10 [ 26.076835] ? __pfx_mmap_region+0x10/0x10 [ 26.077369] ? security_mmap_addr+0x7d/0xa0 [ 26.077912] ? get_unmapped_area+0x1f5/0x3f0 [ 26.078469] do_mmap+0x854/0xf00 [ 26.078915] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.079414] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.079984] ksys_mmap_pgoff+0x3af/0x500 [ 26.080498] do_syscall_64+0x3f/0x90 [ 26.080978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.081674] RIP: 0033:0x7f7faaf04d82 [ 26.082143] 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 [ 26.084292] RSP: 002b:00007ffe72f1bdd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.085205] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7faaf04d82 [ 26.086074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7faa33e000 [ 26.086931] RBP: 00007f7faa33e000 R08: 0000000000000009 R09: 0000000000001000 [ 26.087785] R10: 0000000000000812 R11: 0000000000000206 R12: 000056066f2c1f60 [ 26.088641] R13: 00007ffe72f1bdf0 R14: 00007ffe72f1be20 R15: 00007ffe72f1c180 [ 26.089522] [ 26.089818] [ 26.090040] Allocated by task 213: [ 26.090475] kasan_save_stack+0x22/0x50 [ 26.090984] kasan_set_track+0x25/0x30 [ 26.091502] __kasan_slab_alloc+0x59/0x70 [ 26.092038] kmem_cache_alloc+0x16b/0x370 [ 26.092555] vm_area_dup+0x20/0x160 [ 26.093011] __split_vma+0x170/0x950 [ 26.093478] split_vma+0xc6/0x110 [ 26.093933] mprotect_fixup+0x8d2/0xb30 [ 26.094437] do_mprotect_pkey+0x87e/0xd40 [ 26.094962] __x64_sys_mprotect+0x78/0xc0 [ 26.095492] do_syscall_64+0x3f/0x90 [ 26.095969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.096612] [ 26.096827] Freed by task 19: [ 26.097218] kasan_save_stack+0x22/0x50 [ 26.097739] kasan_set_track+0x25/0x30 [ 26.098236] kasan_save_free_info+0x2b/0x50 [ 26.098781] __kasan_slab_free+0x10a/0x190 [ 26.099340] kmem_cache_free+0x10d/0x4d0 [ 26.099856] rcu_core+0x8c8/0x2860 [ 26.100307] __do_softirq+0x1b7/0x7d4 [ 26.100785] [ 26.101006] Last potentially related work creation: [ 26.101620] kasan_save_stack+0x22/0x50 [ 26.102129] __kasan_record_aux_stack+0x8e/0xa0 [ 26.102708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.103354] remove_vma+0x139/0x170 [ 26.103812] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.104379] do_vmi_munmap+0x1f1/0x2b0 [ 26.104867] __vm_munmap+0x138/0x3a0 [ 26.105336] __x64_sys_munmap+0x59/0x80 [ 26.105842] do_syscall_64+0x3f/0x90 [ 26.106315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.106959] [ 26.107183] The buggy address belongs to the object at ffff88800e469658 [ 26.107183] which belongs to the cache vm_area_struct of size 168 [ 26.108678] The buggy address is located 88 bytes inside of [ 26.108678] freed 168-byte region [ffff88800e469658, ffff88800e469700) [ 26.110099] [ 26.110318] The buggy address belongs to the physical page: [ 26.110988] page:00000000140cd328 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe469 [ 26.112082] memcg:ffff88800da72b01 [ 26.112514] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.113217] page_type: 0xffffffff() [ 26.113698] raw: 0100000000000200 ffff88800879fc80 ffffea00003756c0 dead000000000005 [ 26.114635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da72b01 [ 26.115542] page dumped because: kasan: bad access detected [ 26.116218] [ 26.116441] Memory state around the buggy address: [ 26.117028] ffff88800e469580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.117899] ffff88800e469600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 26.118763] >ffff88800e469680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.119630] ^ [ 26.120219] ffff88800e469700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.121076] ffff88800e469780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.121950] ================================================================== [ 26.122934] Disabling lock debugging due to kernel taint [ 27.915517] BUG: Bad rss-counter state mm:00000000ddcd9ded type:MM_FILEPAGES val:33 [ 27.916255] BUG: Bad rss-counter state mm:00000000ddcd9ded type:MM_ANONPAGES val:22 [ 28.320501] BUG: Bad rss-counter state mm:00000000543446d4 type:MM_FILEPAGES val:33 [ 28.321259] BUG: Bad rss-counter state mm:00000000543446d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4272' (ECDSA) to the list of known hosts. 2023/06/20 06:29:27 fuzzer started 2023/06/20 06:29:27 dialing manager at localhost:44161 2023/06/20 06:29:27 checking machine... 2023/06/20 06:29:27 checking revisions... [ 29.031170] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:29:27 testing simple program... [ 29.084135] cgroup: Unknown subsys name 'net' [ 29.148370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:29:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff864bb901 RDX=ffffffff85407f10 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =ffffffff864bb9f2 R9 =ffff88806ce09ad8 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88806ce09a98 RIP=ffffffff81130937 RFL=00000296 [--S-AP-] 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 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=00007ffd6ace92f8 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=00007f5b5a66e5100000563c14908790 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=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001f7aebc RSI=ffffffff846000aa RDI=ffff88800fbd7580 RBP=ffff88800fbd75d8 RSP=ffff88800fbd7510 R8 =0000000000000001 R9 =ffff88800fbd75c0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800fbd75e0 R13=ffff88800fbd75c8 R14=ffff88800de61b40 R15=ffff88800fbd7580 RIP=ffffffff81130682 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 00007f55ed256900 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=00007f55ed80d618 CR3=000000001bc6a000 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