syzkaller login: [ 35.869022] BUG: Bad rss-counter state mm:0000000024a706f4 type:MM_FILEPAGES val:33 [ 35.870909] BUG: Bad rss-counter state mm:0000000024a706f4 type:MM_ANONPAGES val:22 [ 36.034427] ================================================================== [ 36.035369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.036330] Read of size 8 at addr ffff88800f1375c8 by task sshd/220 [ 36.037126] [ 36.037357] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.038362] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.039371] Call Trace: [ 36.039694] [ 36.039984] dump_stack_lvl+0x91/0xf0 [ 36.040519] print_report+0xcc/0x620 [ 36.041028] ? __virt_addr_valid+0x102/0x340 [ 36.041605] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.042238] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.042868] kasan_report+0xbe/0xf0 [ 36.043349] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.043999] vma_interval_tree_remove+0xc75/0xec0 [ 36.044610] vma_prepare+0xc54/0x11a0 [ 36.045094] __split_vma+0x5af/0x950 [ 36.045590] ? __pfx___split_vma+0x10/0x10 [ 36.046149] ? find_held_lock+0x2c/0x110 [ 36.046679] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.047255] ? lock_is_held_type+0x9f/0x120 [ 36.047802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.048427] ? mtree_range_walk+0x632/0x900 [ 36.048987] ? mas_walk+0x5c7/0x7c0 [ 36.049488] do_vmi_munmap+0x1f1/0x2b0 [ 36.049997] mmap_region+0x1f9/0x2660 [ 36.050491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.051008] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.051775] ? __pfx_lock_acquire+0x10/0x10 [ 36.052337] ? __pfx_mmap_region+0x10/0x10 [ 36.052877] ? security_mmap_addr+0x7d/0xa0 [ 36.053424] ? get_unmapped_area+0x1f5/0x3f0 [ 36.053983] do_mmap+0x854/0xf00 [ 36.054441] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.054962] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.055541] ksys_mmap_pgoff+0x3af/0x500 [ 36.056056] do_syscall_64+0x3f/0x90 [ 36.056549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.057209] RIP: 0033:0x7fd6ab6c5d82 [ 36.057686] 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 [ 36.059826] RSP: 002b:00007fff95373df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.060764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6ab6c5d82 [ 36.061641] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6aaaff000 [ 36.062499] RBP: 00007fd6aaaff000 R08: 0000000000000009 R09: 0000000000001000 [ 36.063371] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a208fa6ec0 [ 36.064249] R13: 00007fff95373e10 R14: 00007fff95373e40 R15: 00007fff953741a0 [ 36.065127] [ 36.065430] [ 36.065651] Allocated by task 213: [ 36.066085] kasan_save_stack+0x22/0x50 [ 36.066602] kasan_set_track+0x25/0x30 [ 36.067107] __kasan_slab_alloc+0x59/0x70 [ 36.067649] kmem_cache_alloc+0x16b/0x370 [ 36.068187] vm_area_dup+0x20/0x160 [ 36.068660] __split_vma+0x170/0x950 [ 36.069139] split_vma+0xc6/0x110 [ 36.069603] mprotect_fixup+0x8d2/0xb30 [ 36.070123] do_mprotect_pkey+0x87e/0xd40 [ 36.070657] __x64_sys_mprotect+0x78/0xc0 [ 36.071185] do_syscall_64+0x3f/0x90 [ 36.071661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.072306] [ 36.072525] Freed by task 213: [ 36.072918] kasan_save_stack+0x22/0x50 [ 36.073451] kasan_set_track+0x25/0x30 [ 36.073959] kasan_save_free_info+0x2b/0x50 [ 36.074502] __kasan_slab_free+0x10a/0x190 [ 36.075048] kmem_cache_free+0x10d/0x4d0 [ 36.075557] rcu_core+0x8c8/0x2860 [ 36.076019] __do_softirq+0x1b7/0x7d4 [ 36.076500] [ 36.076727] Last potentially related work creation: [ 36.077348] kasan_save_stack+0x22/0x50 [ 36.077879] __kasan_record_aux_stack+0x8e/0xa0 [ 36.078460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.079127] remove_vma+0x139/0x170 [ 36.079584] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.080154] do_vmi_munmap+0x1f1/0x2b0 [ 36.080651] __vm_munmap+0x138/0x3a0 [ 36.081123] __x64_sys_munmap+0x59/0x80 [ 36.081642] do_syscall_64+0x3f/0x90 [ 36.082130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.082783] [ 36.083008] The buggy address belongs to the object at ffff88800f137570 [ 36.083008] which belongs to the cache vm_area_struct of size 168 [ 36.084505] The buggy address is located 88 bytes inside of [ 36.084505] freed 168-byte region [ffff88800f137570, ffff88800f137618) [ 36.085955] [ 36.086173] The buggy address belongs to the physical page: [ 36.086842] page:00000000ef1e2405 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf137 [ 36.088008] memcg:ffff88800ef69301 [ 36.088465] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.089222] page_type: 0xffffffff() [ 36.089704] raw: 0100000000000200 ffff88800879fc80 ffffea0000385c80 dead000000000003 [ 36.090667] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef69301 [ 36.091589] page dumped because: kasan: bad access detected [ 36.092263] [ 36.092498] Memory state around the buggy address: [ 36.093136] ffff88800f137480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.094073] ffff88800f137500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.095001] >ffff88800f137580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.095936] ^ [ 36.096658] ffff88800f137600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.097601] ffff88800f137680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.098530] ================================================================== [ 36.099682] Disabling lock debugging due to kernel taint [ 38.070418] BUG: Bad rss-counter state mm:00000000b1cee235 type:MM_FILEPAGES val:33 [ 38.071572] BUG: Bad rss-counter state mm:00000000b1cee235 type:MM_ANONPAGES val:22 [ 38.495743] BUG: Bad rss-counter state mm:00000000020f886c type:MM_FILEPAGES val:33 [ 38.496956] BUG: Bad rss-counter state mm:00000000020f886c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1903' (ECDSA) to the list of known hosts. 2023/06/20 00:30:33 fuzzer started 2023/06/20 00:30:33 dialing manager at localhost:44161 2023/06/20 00:30:33 checking machine... 2023/06/20 00:30:33 checking revisions... [ 39.196881] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:30:33 testing simple program... [ 39.243851] cgroup: Unknown subsys name 'net' [ 39.284175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdb03eb9d8 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=00007ffbd45025100000556f2489c790 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=ffffffff86096690 RBX=0000000000000001 RCX=ffffffff811306da RDX=0000000000000000 RSI=ffffffff86096690 RDI=ffffffff85d915ac RBP=ffff88806cf09af0 RSP=ffff88806cf09a10 R8 =ffffffff86096690 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006076 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbd 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 00007f1682810900 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=00007f1682dc80b0 CR3=0000000009e8e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000