syzkaller login: [ 34.880981] BUG: Bad rss-counter state mm:00000000073811f5 type:MM_FILEPAGES val:33 [ 34.882036] BUG: Bad rss-counter state mm:00000000073811f5 type:MM_ANONPAGES val:22 [ 35.050094] ================================================================== [ 35.051053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.052056] Read of size 8 at addr ffff888019c0d880 by task sshd/222 [ 35.052872] [ 35.053095] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.054106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.055141] Call Trace: [ 35.055500] [ 35.055820] dump_stack_lvl+0x91/0xf0 [ 35.056336] print_report+0xcc/0x620 [ 35.056838] ? __virt_addr_valid+0x102/0x340 [ 35.057411] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.058056] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.058701] kasan_report+0xbe/0xf0 [ 35.059208] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.060082] vma_interval_tree_remove+0xc75/0xec0 [ 35.060815] vma_prepare+0xc54/0x11a0 [ 35.061404] __split_vma+0x5af/0x950 [ 35.061980] ? __pfx___split_vma+0x10/0x10 [ 35.062640] ? find_held_lock+0x2c/0x110 [ 35.063300] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.063988] ? lock_is_held_type+0x9f/0x120 [ 35.064646] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.065395] ? mtree_range_walk+0x632/0x900 [ 35.066065] ? mas_walk+0x5c7/0x7c0 [ 35.066638] do_vmi_munmap+0x1f1/0x2b0 [ 35.067289] mmap_region+0x1f9/0x2660 [ 35.067830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.068359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.069103] ? __pfx_lock_acquire+0x10/0x10 [ 35.069656] ? __pfx_mmap_region+0x10/0x10 [ 35.070208] ? security_mmap_addr+0x7d/0xa0 [ 35.070763] ? get_unmapped_area+0x1f5/0x3f0 [ 35.071349] do_mmap+0x854/0xf00 [ 35.071797] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.072308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.072899] ksys_mmap_pgoff+0x3af/0x500 [ 35.073436] do_syscall_64+0x3f/0x90 [ 35.073926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.074611] RIP: 0033:0x7f8855f3cd82 [ 35.075098] 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 [ 35.077341] RSP: 002b:00007ffe5e6602f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.078281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8855f3cd82 [ 35.079164] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8855376000 [ 35.080045] RBP: 00007f8855376000 R08: 0000000000000009 R09: 0000000000001000 [ 35.080902] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0789c6b20 [ 35.081751] R13: 00007ffe5e660310 R14: 00007ffe5e660340 R15: 00007ffe5e6606a0 [ 35.082615] [ 35.082909] [ 35.083126] Allocated by task 215: [ 35.083584] kasan_save_stack+0x22/0x50 [ 35.084086] kasan_set_track+0x25/0x30 [ 35.084587] __kasan_slab_alloc+0x59/0x70 [ 35.085114] kmem_cache_alloc+0x16b/0x370 [ 35.085640] vm_area_dup+0x20/0x160 [ 35.086104] __split_vma+0x170/0x950 [ 35.086568] split_vma+0xc6/0x110 [ 35.087003] mprotect_fixup+0x8d2/0xb30 [ 35.087521] do_mprotect_pkey+0x87e/0xd40 [ 35.088038] __x64_sys_mprotect+0x78/0xc0 [ 35.088552] do_syscall_64+0x3f/0x90 [ 35.089044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.089710] [ 35.089932] Freed by task 215: [ 35.090349] kasan_save_stack+0x22/0x50 [ 35.090883] kasan_set_track+0x25/0x30 [ 35.091396] kasan_save_free_info+0x2b/0x50 [ 35.091930] __kasan_slab_free+0x10a/0x190 [ 35.092461] kmem_cache_free+0x10d/0x4d0 [ 35.092973] rcu_core+0x8c8/0x2860 [ 35.093420] __do_softirq+0x1b7/0x7d4 [ 35.093901] [ 35.094116] Last potentially related work creation: [ 35.094704] kasan_save_stack+0x22/0x50 [ 35.095232] __kasan_record_aux_stack+0x8e/0xa0 [ 35.095809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.096447] remove_vma+0x139/0x170 [ 35.096906] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.097464] do_vmi_munmap+0x1f1/0x2b0 [ 35.097957] __vm_munmap+0x138/0x3a0 [ 35.098419] __x64_sys_munmap+0x59/0x80 [ 35.098909] do_syscall_64+0x3f/0x90 [ 35.099388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.100028] [ 35.100240] The buggy address belongs to the object at ffff888019c0d828 [ 35.100240] which belongs to the cache vm_area_struct of size 168 [ 35.101693] The buggy address is located 88 bytes inside of [ 35.101693] freed 168-byte region [ffff888019c0d828, ffff888019c0d8d0) [ 35.103104] [ 35.103344] The buggy address belongs to the physical page: [ 35.104001] page:00000000b9279d06 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c0d [ 35.105094] memcg:ffff88800ea1ad01 [ 35.105527] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.106168] page_type: 0xffffffff() [ 35.106622] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.107539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea1ad01 [ 35.108440] page dumped because: kasan: bad access detected [ 35.109108] [ 35.109321] Memory state around the buggy address: [ 35.109898] ffff888019c0d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.110747] ffff888019c0d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.111607] >ffff888019c0d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.112452] ^ [ 35.112858] ffff888019c0d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.113703] ffff888019c0d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.114541] ================================================================== [ 35.115645] Disabling lock debugging due to kernel taint [ 37.026044] BUG: Bad rss-counter state mm:0000000085878c21 type:MM_FILEPAGES val:33 [ 37.027573] BUG: Bad rss-counter state mm:0000000085878c21 type:MM_ANONPAGES val:22 [ 37.477210] BUG: Bad rss-counter state mm:000000007570d0d6 type:MM_FILEPAGES val:33 [ 37.477890] BUG: Bad rss-counter state mm:000000007570d0d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6755' (ECDSA) to the list of known hosts. 2023/06/19 12:29:55 fuzzer started 2023/06/19 12:29:55 dialing manager at localhost:44161 2023/06/19 12:29:55 checking machine... 2023/06/19 12:29:55 checking revisions... [ 38.155707] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:29:56 testing simple program... [ 38.201541] cgroup: Unknown subsys name 'net' [ 38.269172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:29:51 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=00007ffe7342c758 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=00007f956ae75510000055cac1332790 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=ffffffff860d0c26 RBX=0000000000000002 RCX=ffffffff81370a39 RDX=0000000000000000 RSI=ffffffff860d0c26 RDI=ffffffff85db8410 RBP=ffffffff85db8414 RSP=ffff88806cf099b0 R8 =ffffffff860d0c26 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fc0f R12=ffffffff85db8410 R13=ffffffff85db8410 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 RFL=00000282 [--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 00007fa5c056d900 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=00007fa5c0b24618 CR3=000000000f7c4000 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