syzkaller login: [ 30.835598] BUG: Bad rss-counter state mm:000000002aa5e66a type:MM_FILEPAGES val:33 [ 30.836360] BUG: Bad rss-counter state mm:000000002aa5e66a type:MM_ANONPAGES val:22 [ 31.021034] ================================================================== [ 31.021979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.022959] Read of size 8 at addr ffff88800d6296b0 by task sshd/229 [ 31.023858] [ 31.024080] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.024956] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.025961] Call Trace: [ 31.026289] <TASK> [ 31.026576] dump_stack_lvl+0x91/0xf0 [ 31.027075] print_report+0xcc/0x620 [ 31.027578] ? __virt_addr_valid+0x102/0x340 [ 31.028148] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.028779] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.029408] kasan_report+0xbe/0xf0 [ 31.029888] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.030520] vma_interval_tree_remove+0xc75/0xec0 [ 31.031142] vma_prepare+0xc54/0x11a0 [ 31.031634] __split_vma+0x5af/0x950 [ 31.032118] ? __pfx___split_vma+0x10/0x10 [ 31.032657] ? find_held_lock+0x2c/0x110 [ 31.033186] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.033755] ? lock_is_held_type+0x9f/0x120 [ 31.034300] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.034915] ? mtree_range_walk+0x632/0x900 [ 31.035499] ? mas_walk+0x5c7/0x7c0 [ 31.036011] do_vmi_munmap+0x1f1/0x2b0 [ 31.036550] mmap_region+0x1f9/0x2660 [ 31.037070] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.037603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.038330] ? __pfx_lock_acquire+0x10/0x10 [ 31.038866] ? __pfx_mmap_region+0x10/0x10 [ 31.039410] ? security_mmap_addr+0x7d/0xa0 [ 31.039947] ? get_unmapped_area+0x1f5/0x3f0 [ 31.040503] do_mmap+0x854/0xf00 [ 31.040939] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.041430] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.041996] ksys_mmap_pgoff+0x3af/0x500 [ 31.042505] do_syscall_64+0x3f/0x90 [ 31.042984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.043642] RIP: 0033:0x7fd183fcfd82 [ 31.044099] 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 [ 31.046229] RSP: 002b:00007fff6e6d3c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.047144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd183fcfd82 [ 31.047991] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd183409000 [ 31.048844] RBP: 00007fd183409000 R08: 0000000000000009 R09: 0000000000001000 [ 31.049695] R10: 0000000000000812 R11: 0000000000000206 R12: 000055668c592ec0 [ 31.050539] R13: 00007fff6e6d3ca0 R14: 00007fff6e6d3cd0 R15: 00007fff6e6d4030 [ 31.051417] </TASK> [ 31.051726] [ 31.051949] Allocated by task 220: [ 31.052380] kasan_save_stack+0x22/0x50 [ 31.052888] kasan_set_track+0x25/0x30 [ 31.053393] __kasan_slab_alloc+0x59/0x70 [ 31.053922] kmem_cache_alloc+0x16b/0x370 [ 31.054441] vm_area_dup+0x20/0x160 [ 31.054898] __split_vma+0x170/0x950 [ 31.055388] split_vma+0xc6/0x110 [ 31.055827] mprotect_fixup+0x8d2/0xb30 [ 31.056331] do_mprotect_pkey+0x87e/0xd40 [ 31.056856] __x64_sys_mprotect+0x78/0xc0 [ 31.057379] do_syscall_64+0x3f/0x90 [ 31.057892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058547] [ 31.058770] Freed by task 204: [ 31.059180] kasan_save_stack+0x22/0x50 [ 31.059700] kasan_set_track+0x25/0x30 [ 31.060196] kasan_save_free_info+0x2b/0x50 [ 31.060738] __kasan_slab_free+0x10a/0x190 [ 31.061291] kmem_cache_free+0x10d/0x4d0 [ 31.061805] rcu_core+0x8c8/0x2860 [ 31.062256] __do_softirq+0x1b7/0x7d4 [ 31.062730] [ 31.062943] Last potentially related work creation: [ 31.063543] kasan_save_stack+0x22/0x50 [ 31.064046] __kasan_record_aux_stack+0x8e/0xa0 [ 31.064624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.065266] remove_vma+0x139/0x170 [ 31.065715] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.066273] do_vmi_munmap+0x1f1/0x2b0 [ 31.066761] __vm_munmap+0x138/0x3a0 [ 31.067253] __x64_sys_munmap+0x59/0x80 [ 31.067758] do_syscall_64+0x3f/0x90 [ 31.068242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.068895] [ 31.069125] The buggy address belongs to the object at ffff88800d629658 [ 31.069125] which belongs to the cache vm_area_struct of size 168 [ 31.070620] The buggy address is located 88 bytes inside of [ 31.070620] freed 168-byte region [ffff88800d629658, ffff88800d629700) [ 31.072047] [ 31.072268] The buggy address belongs to the physical page: [ 31.072923] page:000000008eae013a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd629 [ 31.074016] memcg:ffff888015e92701 [ 31.074461] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.075106] page_type: 0xffffffff() [ 31.075581] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.076534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e92701 [ 31.077441] page dumped because: kasan: bad access detected [ 31.078105] [ 31.078327] Memory state around the buggy address: [ 31.078911] ffff88800d629580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.079778] ffff88800d629600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.080654] >ffff88800d629680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.081512] ^ [ 31.082119] ffff88800d629700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.083019] ffff88800d629780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.083895] ================================================================== [ 31.085060] Disabling lock debugging due to kernel taint [ 33.663893] BUG: Bad rss-counter state mm:00000000f4548db5 type:MM_FILEPAGES val:33 [ 33.665029] BUG: Bad rss-counter state mm:00000000f4548db5 type:MM_ANONPAGES val:22 [ 34.050890] BUG: Bad rss-counter state mm:000000007ea01fcd type:MM_FILEPAGES val:33 [ 34.052395] BUG: Bad rss-counter state mm:000000007ea01fcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40433' (ECDSA) to the list of known hosts. 2023/06/20 20:43:20 fuzzer started 2023/06/20 20:43:20 dialing manager at localhost:36067 2023/06/20 20:43:20 checking machine... 2023/06/20 20:43:20 checking revisions... [ 34.803623] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:43:21 testing simple program... [ 34.853921] cgroup: Unknown subsys name 'net' [ 34.893378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:43:20 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880197bb480 RCX=0000000000000000 RDX=ffff888016d08000 RSI=ffffffff8166e67d RDI=ffff8880197bb480 RBP=ffff8880197bb480 RSP=ffff88801cd0fc40 R8 =0000000000000001 R9 =ffffed10032f770c R10=ffff8880197bb867 R11=00000000000b6a61 R12=ffff8880197bb6b0 R13=ffff8880197bb4a8 R14=ffffffff84d2ed20 R15=ffff8880197bb558 RIP=ffffffff814c086b 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 00007faddd9dc900 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=00007fadddf93618 CR3=000000000ea64000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fa9c2ecfb00 CR3=000000000db90000 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=2030323a33343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a33343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000