syzkaller login: [ 30.889285] BUG: Bad rss-counter state mm:000000000fae3af0 type:MM_FILEPAGES val:33 [ 30.890267] BUG: Bad rss-counter state mm:000000000fae3af0 type:MM_ANONPAGES val:22 [ 31.064648] ================================================================== [ 31.065559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.066487] Read of size 8 at addr ffff88800fbf9c20 by task sshd/221 [ 31.067391] [ 31.067646] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.068496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.069460] Call Trace: [ 31.069829] [ 31.070122] dump_stack_lvl+0x91/0xf0 [ 31.070615] print_report+0xcc/0x620 [ 31.071095] ? __virt_addr_valid+0x102/0x340 [ 31.071672] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.072280] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.072887] kasan_report+0xbe/0xf0 [ 31.073362] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073983] vma_interval_tree_remove+0xc75/0xec0 [ 31.074589] vma_prepare+0xc54/0x11a0 [ 31.075063] __split_vma+0x5af/0x950 [ 31.075599] ? __pfx___split_vma+0x10/0x10 [ 31.076253] ? find_held_lock+0x2c/0x110 [ 31.076895] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.077594] ? lock_is_held_type+0x9f/0x120 [ 31.078254] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.079006] ? mtree_range_walk+0x632/0x900 [ 31.079689] ? mas_walk+0x5c7/0x7c0 [ 31.080283] do_vmi_munmap+0x1f1/0x2b0 [ 31.080891] mmap_region+0x1f9/0x2660 [ 31.081482] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.082110] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.082993] ? __pfx_lock_acquire+0x10/0x10 [ 31.083746] ? __pfx_mmap_region+0x10/0x10 [ 31.084297] ? security_mmap_addr+0x7d/0xa0 [ 31.084826] ? get_unmapped_area+0x1f5/0x3f0 [ 31.085375] do_mmap+0x854/0xf00 [ 31.085811] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.086299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.086885] ksys_mmap_pgoff+0x3af/0x500 [ 31.087388] do_syscall_64+0x3f/0x90 [ 31.087887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.088526] RIP: 0033:0x7f9ce18ced82 [ 31.088984] 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 [ 31.091092] RSP: 002b:00007ffc2dde5718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.092015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ce18ced82 [ 31.092854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ce0d08000 [ 31.093688] RBP: 00007f9ce0d08000 R08: 0000000000000009 R09: 0000000000001000 [ 31.094533] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641e4074ec0 [ 31.095381] R13: 00007ffc2dde5730 R14: 00007ffc2dde5760 R15: 00007ffc2dde5ac0 [ 31.096303] [ 31.096610] [ 31.096838] Allocated by task 214: [ 31.097282] kasan_save_stack+0x22/0x50 [ 31.097815] kasan_set_track+0x25/0x30 [ 31.098326] __kasan_slab_alloc+0x59/0x70 [ 31.098869] kmem_cache_alloc+0x16b/0x370 [ 31.099395] vm_area_dup+0x20/0x160 [ 31.099861] __split_vma+0x170/0x950 [ 31.100326] split_vma+0xc6/0x110 [ 31.100767] mprotect_fixup+0x8d2/0xb30 [ 31.101263] do_mprotect_pkey+0x87e/0xd40 [ 31.101775] __x64_sys_mprotect+0x78/0xc0 [ 31.102293] do_syscall_64+0x3f/0x90 [ 31.102764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.103399] [ 31.103635] Freed by task 214: [ 31.104025] kasan_save_stack+0x22/0x50 [ 31.104526] kasan_set_track+0x25/0x30 [ 31.105084] kasan_save_free_info+0x2b/0x50 [ 31.105618] __kasan_slab_free+0x10a/0x190 [ 31.106145] kmem_cache_free+0x10d/0x4d0 [ 31.106648] rcu_core+0x8c8/0x2860 [ 31.107085] __do_softirq+0x1b7/0x7d4 [ 31.107575] [ 31.107790] Last potentially related work creation: [ 31.108371] kasan_save_stack+0x22/0x50 [ 31.108908] __kasan_record_aux_stack+0x8e/0xa0 [ 31.109491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.110128] remove_vma+0x139/0x170 [ 31.110584] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.111156] do_vmi_munmap+0x1f1/0x2b0 [ 31.111659] __vm_munmap+0x138/0x3a0 [ 31.112118] __x64_sys_munmap+0x59/0x80 [ 31.112619] do_syscall_64+0x3f/0x90 [ 31.113146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.113791] [ 31.114004] The buggy address belongs to the object at ffff88800fbf9bc8 [ 31.114004] which belongs to the cache vm_area_struct of size 168 [ 31.115474] The buggy address is located 88 bytes inside of [ 31.115474] freed 168-byte region [ffff88800fbf9bc8, ffff88800fbf9c70) [ 31.116909] [ 31.117125] The buggy address belongs to the physical page: [ 31.117780] page:00000000ee0f266b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbf9 [ 31.118869] memcg:ffff888014693b01 [ 31.119297] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.119957] page_type: 0xffffffff() [ 31.120411] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.121371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014693b01 [ 31.122270] page dumped because: kasan: bad access detected [ 31.122923] [ 31.123138] Memory state around the buggy address: [ 31.123746] ffff88800fbf9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.124595] ffff88800fbf9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.125490] >ffff88800fbf9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.126345] ^ [ 31.126869] ffff88800fbf9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.127734] ffff88800fbf9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.128598] ================================================================== [ 31.130009] Disabling lock debugging due to kernel taint [ 33.333209] BUG: Bad rss-counter state mm:00000000e9cb6c62 type:MM_FILEPAGES val:33 [ 33.334414] BUG: Bad rss-counter state mm:00000000e9cb6c62 type:MM_ANONPAGES val:22 [ 33.785233] BUG: Bad rss-counter state mm:000000009b1c8e06 type:MM_FILEPAGES val:33 [ 33.786575] BUG: Bad rss-counter state mm:000000009b1c8e06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65290' (ECDSA) to the list of known hosts. 2023/06/19 17:29:38 fuzzer started 2023/06/19 17:29:38 dialing manager at localhost:44161 2023/06/19 17:29:38 checking machine... 2023/06/19 17:29:38 checking revisions... [ 34.376630] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:29:38 testing simple program... [ 34.421752] cgroup: Unknown subsys name 'net' [ 34.459964] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:29:37 Registers: info registers vcpu 0 RAX=ffffffff83684ee8 RBX=ffffffff85fa78c8 RCX=ffffffff83684ed8 RDX=0000000000000000 RSI=ffffffff863b7b2e RDI=ffffffff85fa78c0 RBP=ffffffff85fa78c0 RSP=ffff8880192ff468 R8 =ffffffff863b7b2e R9 =ffff8880192ff560 R10=0000000000038001 R11=000000000008b93b R12=ffffffff85fa78c4 R13=ffffffff85fa78c0 R14=ffffffff85fa78c0 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000287 [--S--PC] 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 00007f9e9e151900 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=00007f9e9e708618 CR3=000000000c5de000 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=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 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=00007f5d6ea170c8 CR3=000000000a0ae000 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=2037333a39323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a39323a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000