syzkaller login: [ 34.260009] BUG: Bad rss-counter state mm:000000003f033aa5 type:MM_FILEPAGES val:33 [ 34.261402] BUG: Bad rss-counter state mm:000000003f033aa5 type:MM_ANONPAGES val:22 [ 34.416239] ================================================================== [ 34.417318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.418243] Read of size 8 at addr ffff88800f787c20 by task sshd/221 [ 34.419138] [ 34.419359] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.420217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.421190] Call Trace: [ 34.421508] [ 34.421791] dump_stack_lvl+0x91/0xf0 [ 34.422276] print_report+0xcc/0x620 [ 34.422751] ? __virt_addr_valid+0x102/0x340 [ 34.423301] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.423910] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.424526] kasan_report+0xbe/0xf0 [ 34.425006] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.425629] vma_interval_tree_remove+0xc75/0xec0 [ 34.426238] vma_prepare+0xc54/0x11a0 [ 34.426719] __split_vma+0x5af/0x950 [ 34.427197] ? __pfx___split_vma+0x10/0x10 [ 34.427727] ? find_held_lock+0x2c/0x110 [ 34.428247] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.428831] ? lock_is_held_type+0x9f/0x120 [ 34.429361] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.429965] ? mtree_range_walk+0x632/0x900 [ 34.430517] ? mas_walk+0x5c7/0x7c0 [ 34.430996] do_vmi_munmap+0x1f1/0x2b0 [ 34.431488] mmap_region+0x1f9/0x2660 [ 34.431970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.432479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.433199] ? __pfx_lock_acquire+0x10/0x10 [ 34.433728] ? __pfx_mmap_region+0x10/0x10 [ 34.434258] ? security_mmap_addr+0x7d/0xa0 [ 34.434795] ? get_unmapped_area+0x1f5/0x3f0 [ 34.435347] do_mmap+0x854/0xf00 [ 34.435790] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.436284] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.436857] ksys_mmap_pgoff+0x3af/0x500 [ 34.437363] do_syscall_64+0x3f/0x90 [ 34.437842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.438484] RIP: 0033:0x7f62322f0d82 [ 34.438937] 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 [ 34.441086] RSP: 002b:00007ffed6d31678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.441983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62322f0d82 [ 34.442833] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f623172a000 [ 34.443676] RBP: 00007f623172a000 R08: 0000000000000009 R09: 0000000000001000 [ 34.444523] R10: 0000000000000812 R11: 0000000000000206 R12: 000056226db5cf60 [ 34.445360] R13: 00007ffed6d31690 R14: 00007ffed6d316c0 R15: 00007ffed6d31a20 [ 34.446215] [ 34.446503] [ 34.446715] Allocated by task 214: [ 34.447143] kasan_save_stack+0x22/0x50 [ 34.447649] kasan_set_track+0x25/0x30 [ 34.448140] __kasan_slab_alloc+0x59/0x70 [ 34.448665] kmem_cache_alloc+0x16b/0x370 [ 34.449183] vm_area_dup+0x20/0x160 [ 34.449631] __split_vma+0x170/0x950 [ 34.450093] split_vma+0xc6/0x110 [ 34.450533] mprotect_fixup+0x8d2/0xb30 [ 34.451032] do_mprotect_pkey+0x87e/0xd40 [ 34.451548] __x64_sys_mprotect+0x78/0xc0 [ 34.452067] do_syscall_64+0x3f/0x90 [ 34.452539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.453192] [ 34.453408] Freed by task 214: [ 34.453799] kasan_save_stack+0x22/0x50 [ 34.454301] kasan_set_track+0x25/0x30 [ 34.454797] kasan_save_free_info+0x2b/0x50 [ 34.455335] __kasan_slab_free+0x10a/0x190 [ 34.455863] kmem_cache_free+0x10d/0x4d0 [ 34.456365] rcu_core+0x8c8/0x2860 [ 34.456814] __do_softirq+0x1b7/0x7d4 [ 34.457283] [ 34.457499] Last potentially related work creation: [ 34.458080] kasan_save_stack+0x22/0x50 [ 34.458582] __kasan_record_aux_stack+0x8e/0xa0 [ 34.459154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.459796] remove_vma+0x139/0x170 [ 34.460244] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.460821] do_vmi_munmap+0x1f1/0x2b0 [ 34.461310] __vm_munmap+0x138/0x3a0 [ 34.461777] __x64_sys_munmap+0x59/0x80 [ 34.462278] do_syscall_64+0x3f/0x90 [ 34.462750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.463385] [ 34.463599] The buggy address belongs to the object at ffff88800f787bc8 [ 34.463599] which belongs to the cache vm_area_struct of size 168 [ 34.465076] The buggy address is located 88 bytes inside of [ 34.465076] freed 168-byte region [ffff88800f787bc8, ffff88800f787c70) [ 34.466483] [ 34.466698] The buggy address belongs to the physical page: [ 34.467375] page:00000000d5eac6f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf787 [ 34.468454] memcg:ffff888016b1cf01 [ 34.468887] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.469526] page_type: 0xffffffff() [ 34.469994] raw: 0100000000000200 ffff88800879fc80 ffffea000037e3c0 dead00000000000e [ 34.470910] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b1cf01 [ 34.471816] page dumped because: kasan: bad access detected [ 34.472472] [ 34.472688] Memory state around the buggy address: [ 34.473278] ffff88800f787b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.474134] ffff88800f787b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.474981] >ffff88800f787c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.475833] ^ [ 34.476374] ffff88800f787c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.477223] ffff88800f787d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.478070] ================================================================== [ 34.479037] Disabling lock debugging due to kernel taint [ 36.288937] BUG: Bad rss-counter state mm:00000000cb376182 type:MM_FILEPAGES val:33 [ 36.289728] BUG: Bad rss-counter state mm:00000000cb376182 type:MM_ANONPAGES val:22 [ 36.813976] BUG: Bad rss-counter state mm:000000009701d1ab type:MM_FILEPAGES val:33 [ 36.815143] BUG: Bad rss-counter state mm:000000009701d1ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28506' (ECDSA) to the list of known hosts. 2023/06/20 06:41:58 fuzzer started 2023/06/20 06:41:59 dialing manager at localhost:44161 2023/06/20 06:41:59 checking machine... 2023/06/20 06:41:59 checking revisions... [ 37.395678] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:41:59 testing simple program... [ 37.435687] cgroup: Unknown subsys name 'net' [ 37.503154] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:41:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000035 RCX=ffffffff83726530 RDX=ffff888012dc1b40 RSI=0000000000000035 RDI=0000000000000011 RBP=0000000000000036 RSP=ffff888015ddf7b8 R8 =0000000000000004 R9 =000000000000000a R10=0000000000000035 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96c88 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0388 RFL=00000293 [--S-A-C] 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 00007f359e646900 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=00007fffc0e34000 CR3=000000000e996000 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=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 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=00007f3bbece2c80 CR3=000000000da3a000 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=2038353a31343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a31343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000