syzkaller login: [ 44.465121] BUG: Bad rss-counter state mm:0000000014fcff79 type:MM_FILEPAGES val:33 [ 44.466064] BUG: Bad rss-counter state mm:0000000014fcff79 type:MM_ANONPAGES val:22 [ 44.634356] ================================================================== [ 44.635323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.636289] Read of size 8 at addr ffff88800eb51d08 by task sshd/218 [ 44.637070] [ 44.637438] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.638354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.639352] Call Trace: [ 44.639680] <TASK> [ 44.639971] dump_stack_lvl+0x91/0xf0 [ 44.640523] print_report+0xcc/0x620 [ 44.641023] ? __virt_addr_valid+0x102/0x340 [ 44.641612] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.642256] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.642893] kasan_report+0xbe/0xf0 [ 44.643393] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.644064] vma_interval_tree_remove+0xc75/0xec0 [ 44.644829] vma_prepare+0xc54/0x11a0 [ 44.645364] __split_vma+0x5af/0x950 [ 44.645850] ? __pfx___split_vma+0x10/0x10 [ 44.646458] ? find_held_lock+0x2c/0x110 [ 44.646993] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.647598] ? lock_is_held_type+0x9f/0x120 [ 44.648143] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.648839] ? mtree_range_walk+0x632/0x900 [ 44.649419] ? mas_walk+0x5c7/0x7c0 [ 44.649904] do_vmi_munmap+0x1f1/0x2b0 [ 44.650418] mmap_region+0x1f9/0x2660 [ 44.650907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.651458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.652193] ? __pfx_lock_acquire+0x10/0x10 [ 44.652784] ? __pfx_mmap_region+0x10/0x10 [ 44.653350] ? security_mmap_addr+0x7d/0xa0 [ 44.653896] ? get_unmapped_area+0x1f5/0x3f0 [ 44.654475] do_mmap+0x854/0xf00 [ 44.654926] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.655461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.656037] ksys_mmap_pgoff+0x3af/0x500 [ 44.656584] do_syscall_64+0x3f/0x90 [ 44.657077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.657751] RIP: 0033:0x7f4d99fd9d82 [ 44.658217] 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 [ 44.660455] RSP: 002b:00007ffc9855ef78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.661394] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d99fd9d82 [ 44.662271] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d99413000 [ 44.663121] RBP: 00007f4d99413000 R08: 0000000000000009 R09: 0000000000001000 [ 44.664004] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e14012ec0 [ 44.664898] R13: 00007ffc9855ef90 R14: 00007ffc9855efc0 R15: 00007ffc9855f320 [ 44.665796] </TASK> [ 44.666099] [ 44.666353] Allocated by task 211: [ 44.666788] kasan_save_stack+0x22/0x50 [ 44.667337] kasan_set_track+0x25/0x30 [ 44.667843] __kasan_slab_alloc+0x59/0x70 [ 44.668414] kmem_cache_alloc+0x16b/0x370 [ 44.668946] vm_area_dup+0x20/0x160 [ 44.669431] __split_vma+0x170/0x950 [ 44.669910] split_vma+0xc6/0x110 [ 44.670381] mprotect_fixup+0x8d2/0xb30 [ 44.670891] do_mprotect_pkey+0x87e/0xd40 [ 44.671433] __x64_sys_mprotect+0x78/0xc0 [ 44.671976] do_syscall_64+0x3f/0x90 [ 44.672482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.673140] [ 44.673374] Freed by task 211: [ 44.673777] kasan_save_stack+0x22/0x50 [ 44.674308] kasan_set_track+0x25/0x30 [ 44.674815] kasan_save_free_info+0x2b/0x50 [ 44.675387] __kasan_slab_free+0x10a/0x190 [ 44.675933] kmem_cache_free+0x10d/0x4d0 [ 44.676501] rcu_core+0x8c8/0x2860 [ 44.676960] __do_softirq+0x1b7/0x7d4 [ 44.677464] [ 44.677685] Last potentially related work creation: [ 44.678300] kasan_save_stack+0x22/0x50 [ 44.678825] __kasan_record_aux_stack+0x8e/0xa0 [ 44.679428] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.680088] remove_vma+0x139/0x170 [ 44.680587] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.681165] do_vmi_munmap+0x1f1/0x2b0 [ 44.681670] __vm_munmap+0x138/0x3a0 [ 44.682149] __x64_sys_munmap+0x59/0x80 [ 44.682668] do_syscall_64+0x3f/0x90 [ 44.683152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.683830] [ 44.684052] The buggy address belongs to the object at ffff88800eb51cb0 [ 44.684052] which belongs to the cache vm_area_struct of size 168 [ 44.685617] The buggy address is located 88 bytes inside of [ 44.685617] freed 168-byte region [ffff88800eb51cb0, ffff88800eb51d58) [ 44.687067] [ 44.687314] The buggy address belongs to the physical page: [ 44.688001] page:00000000af424a0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb51 [ 44.689148] memcg:ffff88800ccf9c01 [ 44.689597] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.690319] page_type: 0xffffffff() [ 44.690793] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 44.691754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ccf9c01 [ 44.692703] page dumped because: kasan: bad access detected [ 44.693405] [ 44.693634] Memory state around the buggy address: [ 44.694236] ffff88800eb51c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.695113] ffff88800eb51c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.695999] >ffff88800eb51d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.696919] ^ [ 44.697380] ffff88800eb51d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.698279] ffff88800eb51e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 44.699150] ================================================================== [ 44.700403] Disabling lock debugging due to kernel taint [ 47.160176] BUG: Bad rss-counter state mm:00000000ec39fa05 type:MM_FILEPAGES val:33 [ 47.161364] BUG: Bad rss-counter state mm:00000000ec39fa05 type:MM_ANONPAGES val:22 [ 47.660527] BUG: Bad rss-counter state mm:00000000c733df48 type:MM_FILEPAGES val:33 [ 47.661483] BUG: Bad rss-counter state mm:00000000c733df48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58045' (ECDSA) to the list of known hosts. 2023/06/20 10:44:23 fuzzer started 2023/06/20 10:44:24 dialing manager at localhost:44161 2023/06/20 10:44:24 checking machine... 2023/06/20 10:44:24 checking revisions... [ 48.441958] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:44:24 testing simple program... [ 48.491838] cgroup: Unknown subsys name 'net' [ 48.533120] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:44:10 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800be88000 RCX=0000000000000100 RDX=000000000001c062 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800be88180 RSP=ffff88806ce09668 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=0000000000000000 R12=000000000001c062 R13=ffff88800be8c4c8 R14=0000000000000000 R15=ffff88800be88008 RIP=ffffffff821920cf RFL=00000046 [---Z-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 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=00007fa1d471e850 CR3=000000000e5e0000 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=7b1d3917351e5abeff4e46e27c2a1532 XMM02=ec2efd57dc4c00df000000000011cfb8 XMM03=e7e4f5b5db35c938000000000011d088 XMM04=cdefaefb74c931be00000000000ae988 XMM05=848f331ff6d2576e00000000001347a0 XMM06=3a7eb8e1c152eac500000000001334d8 XMM07=fb795ef6d65770560000000000123d78 XMM08=2c67c8bc2e329bc3000000000011d028 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363ddc0 RBX=ffffffff85fa39a8 RCX=ffffffff8363dd1b RDX=0000000000000000 RSI=ffffffff863b1c7e RDI=ffffffff85fa39a0 RBP=ffffffff85fa39a0 RSP=ffff888015aaf7c0 R8 =ffffffff863b1c7e R9 =ffff888015aaf8b8 R10=0000000000038001 R11=000000000008a973 R12=ffffffff85fa39a4 R13=ffffffff85fa39a0 R14=ffffffff85fa39a0 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000283 [--S---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 00007f11ea431900 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=00007ffcffe5b000 CR3=000000000eb22000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000