syzkaller login: [ 30.423161] BUG: Bad rss-counter state mm:0000000043e603ad type:MM_FILEPAGES val:33 [ 30.424046] BUG: Bad rss-counter state mm:0000000043e603ad type:MM_ANONPAGES val:22 [ 30.534959] ================================================================== [ 30.535623] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.536242] Read of size 8 at addr ffff88800e2e0058 by task sshd/219 [ 30.536714] [ 30.536849] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.537401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.538020] Call Trace: [ 30.538231] [ 30.538417] dump_stack_lvl+0x91/0xf0 [ 30.538718] print_report+0xcc/0x620 [ 30.539012] ? __virt_addr_valid+0x102/0x340 [ 30.539413] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539817] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.540191] kasan_report+0xbe/0xf0 [ 30.540531] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.540937] vma_interval_tree_remove+0xc75/0xec0 [ 30.541357] vma_prepare+0xc54/0x11a0 [ 30.542207] __split_vma+0x5af/0x950 [ 30.542977] ? __pfx___split_vma+0x10/0x10 [ 30.543935] ? find_held_lock+0x2c/0x110 [ 30.544820] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.545766] ? lock_is_held_type+0x9f/0x120 [ 30.546683] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.547803] ? mtree_range_walk+0x632/0x900 [ 30.548760] ? mas_walk+0x5c7/0x7c0 [ 30.549570] do_vmi_munmap+0x1f1/0x2b0 [ 30.550430] mmap_region+0x1f9/0x2660 [ 30.551270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.552132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.553413] ? __pfx_lock_acquire+0x10/0x10 [ 30.554369] ? __pfx_mmap_region+0x10/0x10 [ 30.555338] ? security_mmap_addr+0x7d/0xa0 [ 30.556279] ? get_unmapped_area+0x1f5/0x3f0 [ 30.557252] do_mmap+0x854/0xf00 [ 30.557988] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.558809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.559840] ksys_mmap_pgoff+0x3af/0x500 [ 30.560753] do_syscall_64+0x3f/0x90 [ 30.561617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.562751] RIP: 0033:0x7f4fee39ed82 [ 30.563588] 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 [ 30.568203] RSP: 002b:00007fff6e994338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.570039] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fee39ed82 [ 30.571735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fed7d8000 [ 30.573380] RBP: 00007f4fed7d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.575022] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6d7a59ec0 [ 30.575883] R13: 00007fff6e994350 R14: 00007fff6e994380 R15: 00007fff6e9946e0 [ 30.576460] [ 30.576665] [ 30.576817] Allocated by task 212: [ 30.577119] kasan_save_stack+0x22/0x50 [ 30.577463] kasan_set_track+0x25/0x30 [ 30.577798] __kasan_slab_alloc+0x59/0x70 [ 30.578179] kmem_cache_alloc+0x16b/0x370 [ 30.578518] vm_area_dup+0x20/0x160 [ 30.578816] __split_vma+0x170/0x950 [ 30.579134] split_vma+0xc6/0x110 [ 30.579505] mprotect_fixup+0x8d2/0xb30 [ 30.579840] do_mprotect_pkey+0x87e/0xd40 [ 30.580161] __x64_sys_mprotect+0x78/0xc0 [ 30.580504] do_syscall_64+0x3f/0x90 [ 30.580826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.581277] [ 30.581420] Freed by task 212: [ 30.581682] kasan_save_stack+0x22/0x50 [ 30.582020] kasan_set_track+0x25/0x30 [ 30.582377] kasan_save_free_info+0x2b/0x50 [ 30.582718] __kasan_slab_free+0x10a/0x190 [ 30.583048] kmem_cache_free+0x10d/0x4d0 [ 30.583578] rcu_core+0x8c8/0x2860 [ 30.583872] __do_softirq+0x1b7/0x7d4 [ 30.584192] [ 30.584340] Last potentially related work creation: [ 30.584742] kasan_save_stack+0x22/0x50 [ 30.585067] __kasan_record_aux_stack+0x8e/0xa0 [ 30.585440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.585872] remove_vma+0x139/0x170 [ 30.586205] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.586627] do_vmi_munmap+0x1f1/0x2b0 [ 30.586959] __vm_munmap+0x138/0x3a0 [ 30.587319] __x64_sys_munmap+0x59/0x80 [ 30.587652] do_syscall_64+0x3f/0x90 [ 30.587980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.588426] [ 30.588571] Second to last potentially related work creation: [ 30.589017] kasan_save_stack+0x22/0x50 [ 30.589365] __kasan_record_aux_stack+0x8e/0xa0 [ 30.589753] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.590208] remove_vma+0x139/0x170 [ 30.590514] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.590892] do_vmi_munmap+0x1f1/0x2b0 [ 30.591248] mmap_region+0x1f9/0x2660 [ 30.591564] do_mmap+0x854/0xf00 [ 30.591837] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.592154] ksys_mmap_pgoff+0x3af/0x500 [ 30.592493] do_syscall_64+0x3f/0x90 [ 30.592813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.593252] [ 30.593398] The buggy address belongs to the object at ffff88800e2e0000 [ 30.593398] which belongs to the cache vm_area_struct of size 168 [ 30.594365] The buggy address is located 88 bytes inside of [ 30.594365] freed 168-byte region [ffff88800e2e0000, ffff88800e2e00a8) [ 30.595304] [ 30.595446] The buggy address belongs to the physical page: [ 30.595872] page:00000000237146de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2e0 [ 30.596600] memcg:ffff88800dd23d01 [ 30.596887] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.597355] page_type: 0xffffffff() [ 30.597656] raw: 0100000000000200 ffff8880087a0c80 ffffea000038aac0 dead000000000003 [ 30.598254] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd23d01 [ 30.598824] page dumped because: kasan: bad access detected [ 30.599269] [ 30.599400] Memory state around the buggy address: [ 30.599762] ffff88800e2dff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.600300] ffff88800e2dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.600864] >ffff88800e2e0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.601418] ^ [ 30.601880] ffff88800e2e0080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.602455] ffff88800e2e0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.602986] ================================================================== [ 30.603667] Disabling lock debugging due to kernel taint [ 32.287366] BUG: Bad rss-counter state mm:00000000281eec8c type:MM_FILEPAGES val:33 [ 32.288527] BUG: Bad rss-counter state mm:00000000281eec8c type:MM_ANONPAGES val:22 [ 32.646176] BUG: Bad rss-counter state mm:0000000033bc9bc4 type:MM_FILEPAGES val:33 [ 32.646833] BUG: Bad rss-counter state mm:0000000033bc9bc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4612' (ECDSA) to the list of known hosts. 2023/06/21 08:54:45 fuzzer started 2023/06/21 08:54:45 dialing manager at localhost:36067 2023/06/21 08:54:45 checking machine... 2023/06/21 08:54:45 checking revisions... [ 33.243414] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:54:45 testing simple program... [ 33.275074] cgroup: Unknown subsys name 'net' [ 33.306505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:54:45 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=ffff888008e50000 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=00007ffc5eba6458 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=00007f911b57f5100000557de72f2790 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=ffff888016439bc0 RCX=ffffffff81294506 RDX=1ffff1100d9e72ea RSI=0000000000000008 RDI=ffff888016439bc0 RBP=dffffc0000000000 RSP=ffff88806cf09d28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806cf39500 R13=0000000000000000 R14=ffff888016439b40 R15=ffff88806cf395c0 RIP=ffffffff8125301a RFL=00000082 [--S----] 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 00007f4250c46900 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=00007ffe184be000 CR3=000000001640e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000