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Mon, 20 Apr 2026 14:36:21 -0700 (PDT) Date: Mon, 20 Apr 2026 14:36:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69e69c55.050a0220.24bfd3.002a.GAE@google.com> Subject: [syzbot] [mm?] BUG: sleeping function called from invalid context in __zap_vma_range From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, jannh@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, pfalcato@suse.de, syzkaller-bugs@googlegroups.com, vbabka@kernel.org Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: tt3hndirtjys5z9fmzwoskwi6xwjgs8c X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 4A86C14000F X-HE-Tag: 1776720982-258823 X-HE-Meta: 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 Ke0odjRD 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 wWs6A/PZ 1fb4Fg+viN/2xDVCNsxzzVLv7rUGtC9p20J7qhz+Wn0WNj4oUidlMnpUiAV7k27NJFWIqZbKTXz/96jKtiY7nFhPKjDhbEhdlkUOpUKBLdI1lNGYvdNFRPAutj/uc+G+P/tHWuq5yyFRT4klkTJ6Crox/1BWG2xIcPeaBsqJp9ctjOoZ7okHeUffjXc+f1exLNhNYQQ6rHWiRCM2ecG+sECLdHjCoy70lcOZv7HsFJjG5kt8IMSEw1Agh0wxLXjOxSwzJb8sEKDuX4Apwrl5388pZWaO6rFd3vavcSp3xJBGSHosNtCbswoR8bOOxUITycK17wtUPFJgVaTHCeDCyzn8V/HTlcHAEq9bu+Oix1LDWJmmVAveE9txOCFxwMeFU6xgz8xo/7WzWvm0aLk6j5TIL/m3yFjOL6Zx2GiwoPXk4XU5d3VJIgZmYypg1cJuhtYlchN3KNKwwTA5xKwVBUhyBqGruZbH Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: c1f49dea2b8f Merge tag 'mm-hotfixes-stable-2026-04-19-00-1.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=142514ce580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6a29a582d8ced859 dashboard link: https://syzkaller.appspot.com/bug?extid=4cc5bc01fb4a179c4ffa compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-c1f49dea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/402c79548d6e/vmlinux-c1f49dea.xz kernel image: https://storage.googleapis.com/syzbot-assets/1bc39526d7f4/bzImage-c1f49dea.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4cc5bc01fb4a179c4ffa@syzkaller.appspotmail.com BUG: sleeping function called from invalid context at mm/memory.c:2007 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5913, name: cmp preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 2 locks held by cmp/5913: #0: ffff88801b8cc078 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:592 [inline] #0: ffff88801b8cc078 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x124/0xa10 mm/mmap.c:1284 #1: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #1: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #1: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290 CPU: 3 UID: 0 PID: 5913 Comm: cmp Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 __might_resched.cold+0x1ec/0x232 kernel/sched/core.c:9162 zap_pmd_range mm/memory.c:2007 [inline] zap_pud_range mm/memory.c:2032 [inline] zap_p4d_range mm/memory.c:2053 [inline] __zap_vma_range+0x184b/0x4bf0 mm/memory.c:2093 unmap_vmas+0x299/0x5f0 mm/memory.c:2162 exit_mmap+0x1ef/0xa10 mm/mmap.c:1300 __mmput+0x12a/0x410 kernel/fork.c:1178 mmput+0x67/0x80 kernel/fork.c:1201 exit_mm kernel/exit.c:581 [inline] do_exit+0x833/0x2a60 kernel/exit.c:963 do_group_exit+0xd5/0x2a0 kernel/exit.c:1117 __do_sys_exit_group kernel/exit.c:1128 [inline] __se_sys_exit_group kernel/exit.c:1126 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1126 x64_sys_call+0x102c/0x1530 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fedcf5c96c5 Code: Unable to access opcode bytes at 0x7fedcf5c969b. RSP: 002b:00007ffd9f5f73c8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fedcf6cafe8 RCX: 00007fedcf5c96c5 RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000 RBP: 0000000000000001 R08: 00007ffd9f5f7358 R09: 0000000000000000 R10: 00007ffd9f5f71f0 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fedcf6c9680 R15: 00007fedcf6cb000 ============================= [ BUG: Invalid wait context ] syzkaller #0 Tainted: G W ----------------------------- cmp/5913 is trying to lock: ffff88801b8cc078 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:536 [inline] ffff88801b8cc078 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x22c/0xa10 mm/mmap.c:1308 other info that might help us debug this: context-{5:5} 1 lock held by cmp/5913: #0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290 stack backtrace: CPU: 3 UID: 0 PID: 5913 Comm: cmp Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4830 [inline] check_wait_context kernel/locking/lockdep.c:4902 [inline] __lock_acquire+0xfa4/0x2630 kernel/locking/lockdep.c:5187 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825 down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1625 mmap_write_lock include/linux/mmap_lock.h:536 [inline] exit_mmap+0x22c/0xa10 mm/mmap.c:1308 __mmput+0x12a/0x410 kernel/fork.c:1178 mmput+0x67/0x80 kernel/fork.c:1201 exit_mm kernel/exit.c:581 [inline] do_exit+0x833/0x2a60 kernel/exit.c:963 do_group_exit+0xd5/0x2a0 kernel/exit.c:1117 __do_sys_exit_group kernel/exit.c:1128 [inline] __se_sys_exit_group kernel/exit.c:1126 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1126 x64_sys_call+0x102c/0x1530 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fedcf5c96c5 Code: Unable to access opcode bytes at 0x7fedcf5c969b. RSP: 002b:00007ffd9f5f73c8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fedcf6cafe8 RCX: 00007fedcf5c96c5 RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000 RBP: 0000000000000001 R08: 00007ffd9f5f7358 R09: 0000000000000000 R10: 00007ffd9f5f71f0 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fedcf6c9680 R15: 00007fedcf6cb000 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup