[ 23.956201] BUG: Bad rss-counter state mm:00000000b2e0945f type:MM_FILEPAGES val:33 [ 23.957195] BUG: Bad rss-counter state mm:00000000b2e0945f type:MM_ANONPAGES val:22 [ 23.991808] ================================================================== [ 23.992719] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.993684] Read of size 8 at addr ffff88800e84a6b0 by task sshd/220 [ 23.994476] [ 23.994692] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.995781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.996757] Call Trace: [ 23.997077] [ 23.997365] dump_stack_lvl+0x91/0xf0 [ 23.997873] print_report+0xcc/0x620 [ 23.998360] ? __virt_addr_valid+0x102/0x340 [ 23.998911] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.999530] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.000159] kasan_report+0xbe/0xf0 [ 24.000645] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.001262] vma_interval_tree_remove+0xc75/0xec0 [ 24.001869] vma_prepare+0xc54/0x11a0 [ 24.002377] __split_vma+0x5af/0x950 [ 24.002869] ? __pfx___split_vma+0x10/0x10 [ 24.003413] ? find_held_lock+0x2c/0x110 [ 24.003957] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.004527] ? lock_is_held_type+0x9f/0x120 [ 24.005073] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.005689] ? mtree_range_walk+0x632/0x900 [ 24.006255] ? mas_walk+0x5c7/0x7c0 [ 24.006758] do_vmi_munmap+0x1f1/0x2b0 [ 24.007274] mmap_region+0x1f9/0x2660 [ 24.007821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.008386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.009153] ? __pfx_lock_acquire+0x10/0x10 [ 24.009687] ? __pfx_mmap_region+0x10/0x10 [ 24.010219] ? security_mmap_addr+0x7d/0xa0 [ 24.010752] ? get_unmapped_area+0x1f5/0x3f0 [ 24.011302] do_mmap+0x854/0xf00 [ 24.011765] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.012261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.012820] ksys_mmap_pgoff+0x3af/0x500 [ 24.013330] do_syscall_64+0x3f/0x90 [ 24.013813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.014463] RIP: 0033:0x7f3369252d82 [ 24.014916] 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 [ 24.017075] RSP: 002b:00007ffc7c4edc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.018020] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3369252d82 [ 24.018904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f336868c000 [ 24.019805] RBP: 00007f336868c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.020679] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edbe493ec0 [ 24.021557] R13: 00007ffc7c4edc80 R14: 00007ffc7c4edcb0 R15: 00007ffc7c4ee010 [ 24.022437] [ 24.022733] [ 24.022955] Allocated by task 213: [ 24.023394] kasan_save_stack+0x22/0x50 [ 24.023918] kasan_set_track+0x25/0x30 [ 24.024415] __kasan_slab_alloc+0x59/0x70 [ 24.024940] kmem_cache_alloc+0x16b/0x370 [ 24.025456] vm_area_dup+0x20/0x160 [ 24.025919] __split_vma+0x170/0x950 [ 24.026385] split_vma+0xc6/0x110 [ 24.026829] mprotect_fixup+0x8d2/0xb30 [ 24.027337] do_mprotect_pkey+0x87e/0xd40 [ 24.027879] __x64_sys_mprotect+0x78/0xc0 [ 24.028391] do_syscall_64+0x3f/0x90 [ 24.028866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.029500] [ 24.029717] Freed by task 211: [ 24.030110] kasan_save_stack+0x22/0x50 [ 24.030629] kasan_set_track+0x25/0x30 [ 24.031144] kasan_save_free_info+0x2b/0x50 [ 24.031697] __kasan_slab_free+0x10a/0x190 [ 24.032244] kmem_cache_free+0x10d/0x4d0 [ 24.032762] rcu_core+0x8c8/0x2860 [ 24.033205] __do_softirq+0x1b7/0x7d4 [ 24.033689] [ 24.033907] Last potentially related work creation: [ 24.034497] kasan_save_stack+0x22/0x50 [ 24.035023] __kasan_record_aux_stack+0x8e/0xa0 [ 24.035645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.036298] remove_vma+0x139/0x170 [ 24.036768] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.037352] do_vmi_munmap+0x1f1/0x2b0 [ 24.037856] __vm_munmap+0x138/0x3a0 [ 24.038340] __x64_sys_munmap+0x59/0x80 [ 24.038849] do_syscall_64+0x3f/0x90 [ 24.039338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.040013] [ 24.040232] The buggy address belongs to the object at ffff88800e84a658 [ 24.040232] which belongs to the cache vm_area_struct of size 168 [ 24.041698] The buggy address is located 88 bytes inside of [ 24.041698] freed 168-byte region [ffff88800e84a658, ffff88800e84a700) [ 24.043141] [ 24.043364] The buggy address belongs to the physical page: [ 24.044067] page:00000000339ee930 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe84a [ 24.045223] memcg:ffff88800e4fdd01 [ 24.045673] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.046336] page_type: 0xffffffff() [ 24.046805] raw: 0100000000000200 ffff8880087a0c80 ffffea0000607180 dead000000000004 [ 24.047746] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4fdd01 [ 24.048680] page dumped because: kasan: bad access detected [ 24.049337] [ 24.049551] Memory state around the buggy address: [ 24.050126] ffff88800e84a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.051019] ffff88800e84a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.051903] >ffff88800e84a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.052764] ^ [ 24.053363] ffff88800e84a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.054235] ffff88800e84a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.055105] ================================================================== [ 24.056318] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.172111] BUG: Bad rss-counter state mm:00000000c6e31b99 type:MM_FILEPAGES val:33 [ 26.173359] BUG: Bad rss-counter state mm:00000000c6e31b99 type:MM_ANONPAGES val:22 [ 26.673430] BUG: Bad rss-counter state mm:0000000096ff056b type:MM_FILEPAGES val:33 [ 26.674534] BUG: Bad rss-counter state mm:0000000096ff056b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35647' (ECDSA) to the list of known hosts. 2023/06/20 20:47:34 fuzzer started 2023/06/20 20:47:35 dialing manager at localhost:36067 2023/06/20 20:47:35 checking machine... 2023/06/20 20:47:35 checking revisions... [ 27.409663] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:47:35 testing simple program... [ 27.465628] cgroup: Unknown subsys name 'net' [ 27.535090] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:47:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f1e02e72dd0 CR3=0000000018076000 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=2034333a37343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a37343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88806cf09f88 RSI=ffff88806cf09f50 RDI=ffff88806cf09a30 RBP=ffff88806cf09ab8 RSP=ffff88806cf09a20 R8 =0000000000000001 R9 =ffff88806cf09a60 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09ae8 R13=0000000000000000 R14=ffff888019891b40 R15=ffff88800eeabd00 RIP=ffffffff810bd057 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 00007f14b0fae900 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=00007ffe33562000 CR3=000000000ca94000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000